HighResolutionTimer: Complete rewrite

- added unit tests
- best performance timers used for each platform
- fixed an issue in which timer callbacks could drift

examples/DemoRunner/Builds/Android/app/CMakeLists.txt

@@ -1057,10 +1057,12 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -1072,6 +1074,11 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"
@@ -3109,10 +3116,12 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -3124,6 +3133,11 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"

examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj

@@ -1343,6 +1343,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1373,6 +1376,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3339,9 +3351,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters

@@ -1957,6 +1957,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1993,6 +1996,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -5262,6 +5277,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -5271,6 +5289,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj

@@ -1343,6 +1343,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1373,6 +1376,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3339,9 +3351,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters

@@ -1957,6 +1957,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1993,6 +1996,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -5262,6 +5277,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -5271,6 +5289,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

examples/DemoRunner/Builds/VisualStudio2022/DemoRunner_App.vcxproj

@@ -1343,6 +1343,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1373,6 +1376,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3339,9 +3351,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

examples/DemoRunner/Builds/VisualStudio2022/DemoRunner_App.vcxproj.filters

@@ -1957,6 +1957,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1993,6 +1996,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -5262,6 +5277,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -5271,6 +5289,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt

@@ -933,10 +933,12 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -948,6 +950,11 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"
@@ -2683,10 +2690,12 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -2698,6 +2707,11 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"

extras/AudioPerformanceTest/Builds/VisualStudio2022/AudioPerformanceTest_App.vcxproj

@@ -1183,6 +1183,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1213,6 +1216,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -2892,9 +2904,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/AudioPerformanceTest/Builds/VisualStudio2022/AudioPerformanceTest_App.vcxproj.filters

@@ -1666,6 +1666,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1702,6 +1705,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4539,6 +4554,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4548,6 +4566,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt

@@ -966,10 +966,12 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -981,6 +983,11 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"
@@ -2871,10 +2878,12 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -2886,6 +2895,11 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"

extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj

@@ -1191,6 +1191,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1221,6 +1224,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3075,9 +3087,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters

@@ -1741,6 +1741,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1777,6 +1780,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4818,6 +4833,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4827,6 +4845,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj

@@ -1191,6 +1191,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1221,6 +1224,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3075,9 +3087,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters

@@ -1741,6 +1741,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1777,6 +1780,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4818,6 +4833,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4827,6 +4845,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/AudioPluginHost/Builds/VisualStudio2022/AudioPluginHost_App.vcxproj

@@ -1191,6 +1191,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1221,6 +1224,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -3075,9 +3087,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/AudioPluginHost/Builds/VisualStudio2022/AudioPluginHost_App.vcxproj.filters

@@ -1741,6 +1741,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1777,6 +1780,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4818,6 +4833,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4827,6 +4845,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/BinaryBuilder/Builds/VisualStudio2022/BinaryBuilder_ConsoleApp.vcxproj

@@ -256,6 +256,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -286,6 +289,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -541,9 +553,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/BinaryBuilder/Builds/VisualStudio2022/BinaryBuilder_ConsoleApp.vcxproj.filters

@@ -193,6 +193,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -229,6 +232,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -636,6 +651,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -645,6 +663,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt

@@ -937,10 +937,12 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -952,6 +954,11 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"
@@ -2767,10 +2774,12 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_CFHelpers_mac.h"
     "../../../../../modules/juce_core/native/juce_CommonFile_linux.cpp"
     "../../../../../modules/juce_core/native/juce_ComSmartPtr_windows.h"
+    "../../../../../modules/juce_core/native/juce_FileDescriptor_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_android.cpp"
     "../../../../../modules/juce_core/native/juce_Files_linux.cpp"
     "../../../../../modules/juce_core/native/juce_Files_mac.mm"
     "../../../../../modules/juce_core/native/juce_Files_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_HighResolutionTimerThread.h"
     "../../../../../modules/juce_core/native/juce_IPAddress_posix.h"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.cpp"
     "../../../../../modules/juce_core/native/juce_JNIHelpers_android.h"
@@ -2782,6 +2791,11 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_linux.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_mac.mm"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_wasm.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
+    "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
     "../../../../../modules/juce_core/native/juce_Registry_windows.cpp"
     "../../../../../modules/juce_core/native/juce_RuntimePermissions_android.cpp"
     "../../../../../modules/juce_core/native/juce_SharedCode_intel.h"

extras/NetworkGraphicsDemo/Builds/VisualStudio2022/NetworkGraphicsDemo_App.vcxproj

@@ -1183,6 +1183,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1213,6 +1216,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -2983,9 +2995,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/NetworkGraphicsDemo/Builds/VisualStudio2022/NetworkGraphicsDemo_App.vcxproj.filters

@@ -1696,6 +1696,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -1732,6 +1735,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4680,6 +4695,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4689,6 +4707,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/Projucer/Builds/VisualStudio2017/Projucer_App.vcxproj

@@ -392,6 +392,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -422,6 +425,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1834,9 +1846,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/Projucer/Builds/VisualStudio2017/Projucer_App.vcxproj.filters

@@ -670,6 +670,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -706,6 +709,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -2709,6 +2724,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -2718,6 +2736,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/Projucer/Builds/VisualStudio2019/Projucer_App.vcxproj

@@ -392,6 +392,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -422,6 +425,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -1834,9 +1846,11 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_BasicNativeHeaders.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ThreadPriorities_native.h"/>

extras/Projucer/Builds/VisualStudio2019/Projucer_App.vcxproj.filters

@@ -670,6 +670,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -706,6 +709,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -2709,6 +2724,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -2718,6 +2736,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

extras/Projucer/Builds/VisualStudio2022/Projucer_App.vcxproj

@@ -392,6 +392,9 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
@@ -422,6 +425,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
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@@ -1834,9 +1846,11 @@
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_posix.h"/>
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extras/Projucer/Builds/VisualStudio2022/Projucer_App.vcxproj.filters

@@ -670,6 +670,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_CommonFile_linux.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
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@@ -706,6 +709,18 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
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extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj

@@ -1199,6 +1199,9 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
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@@ -1229,6 +1232,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
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@@ -3141,9 +3153,11 @@
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
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extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1765,6 +1765,9 @@
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
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       <Filter>JUCE Modules\juce_core\native</Filter>
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
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extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj

@@ -1199,6 +1199,9 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
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@@ -1229,6 +1232,15 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_CFHelpers_mac.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h"/>
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
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extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1765,6 +1765,9 @@
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
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+      <Filter>JUCE Modules\juce_core\native</Filter>
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+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
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+      <Filter>JUCE Modules\juce_core\native</Filter>
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extras/UnitTestRunner/Builds/VisualStudio2022/UnitTestRunner_ConsoleApp.vcxproj

@@ -1199,6 +1199,9 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_FileDescriptor_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
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@@ -1229,6 +1232,15 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <ExcludedFromBuild>true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h"/>
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h"/>
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extras/UnitTestRunner/Builds/VisualStudio2022/UnitTestRunner_ConsoleApp.vcxproj.filters

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       <Filter>JUCE Modules\juce_core\native</Filter>
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extras/WindowsDLL/Builds/VisualStudio2022/WindowsDLL_StaticLibrary.vcxproj

@@ -1182,6 +1182,9 @@
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       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClCompile>
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     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Files_android.cpp">
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@@ -1212,6 +1215,15 @@
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+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
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+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
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     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_JNIHelpers_android.h"/>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h"/>
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extras/WindowsDLL/Builds/VisualStudio2022/WindowsDLL_StaticLibrary.vcxproj.filters

@@ -1693,6 +1693,9 @@
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       <Filter>JUCE Modules\juce_core\native</Filter>
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       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_linux.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_mac.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_wasm.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_windows.cpp">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Registry_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
@@ -4647,6 +4662,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ComSmartPtr_windows.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_HighResolutionTimerThread.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_IPAddress_posix.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
@@ -4656,6 +4674,9 @@
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimerListener.h">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\modules\juce_core\native\juce_SharedCode_intel.h">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClInclude>

modules/juce_core/juce_core.cpp

@@ -187,6 +187,8 @@
 #include "files/juce_FileFilter.cpp"
 #include "files/juce_WildcardFileFilter.cpp"
 #include "native/juce_ThreadPriorities_native.h"
+#include "native/juce_PlatformTimerListener.h"
+#include "native/juce_HighResolutionTimerThread.h"
 
 //==============================================================================
 #if ! JUCE_WINDOWS
@@ -205,6 +207,7 @@
  #include "native/juce_SharedCode_intel.h"
  #include "native/juce_SystemStats_mac.mm"
  #include "native/juce_Threads_mac.mm"
+ #include "native/juce_PlatformTimer_mac.mm"
 
 //==============================================================================
 #elif JUCE_WINDOWS
@@ -213,20 +216,34 @@
  #include "native/juce_Registry_windows.cpp"
  #include "native/juce_SystemStats_windows.cpp"
  #include "native/juce_Threads_windows.cpp"
+ #include "native/juce_PlatformTimer_windows.cpp"
 
 //==============================================================================
-#elif JUCE_LINUX || JUCE_BSD
+#elif JUCE_LINUX
  #include "native/juce_CommonFile_linux.cpp"
  #include "native/juce_Files_linux.cpp"
  #include "native/juce_Network_linux.cpp"
  #if JUCE_USE_CURL
   #include "native/juce_Network_curl.cpp"
  #endif
- #if JUCE_BSD
-  #include "native/juce_SharedCode_intel.h"
+ #include "native/juce_SystemStats_linux.cpp"
+ #include "native/juce_Threads_linux.cpp"
+ #include "native/juce_FileDescriptor_linux.cpp"
+ #include "native/juce_PlatformTimer_linux.cpp"
+
+//==============================================================================
+#elif JUCE_BSD
+ #include "native/juce_CommonFile_linux.cpp"
+ #include "native/juce_Files_linux.cpp"
+ #include "native/juce_Network_linux.cpp"
+ #if JUCE_USE_CURL
+  #include "native/juce_Network_curl.cpp"
  #endif
+ #include "native/juce_SharedCode_intel.h"
  #include "native/juce_SystemStats_linux.cpp"
  #include "native/juce_Threads_linux.cpp"
+ #include "native/juce_FileDescriptor_linux.cpp"
+ #include "native/juce_PlatformTimer_linux.cpp"
 
 //==============================================================================
 #elif JUCE_ANDROID
@@ -238,10 +255,13 @@
  #include "native/juce_SystemStats_android.cpp"
  #include "native/juce_Threads_android.cpp"
  #include "native/juce_RuntimePermissions_android.cpp"
+ #include "native/juce_FileDescriptor_linux.cpp"
+ #include "native/juce_PlatformTimer_linux.cpp"
 
+//==============================================================================
 #elif JUCE_WASM
  #include "native/juce_SystemStats_wasm.cpp"
-
+ #include "native/juce_PlatformTimer_wasm.cpp"
 #endif
 
 #include "files/juce_common_MimeTypes.h"

modules/juce_core/juce_core.h

@@ -315,12 +315,12 @@ JUCE_END_IGNORE_WARNINGS_MSVC
 #include "misc/juce_WindowsRegistry.h"
 #include "threads/juce_ChildProcess.h"
 #include "threads/juce_DynamicLibrary.h"
-#include "threads/juce_HighResolutionTimer.h"
 #include "threads/juce_InterProcessLock.h"
 #include "threads/juce_Process.h"
 #include "threads/juce_SpinLock.h"
 #include "threads/juce_WaitableEvent.h"
 #include "threads/juce_Thread.h"
+#include "threads/juce_HighResolutionTimer.h"
 #include "threads/juce_ThreadLocalValue.h"
 #include "threads/juce_ThreadPool.h"
 #include "threads/juce_TimeSliceThread.h"

modules/juce_core/native/juce_BasicNativeHeaders.h

@@ -209,6 +209,8 @@
  #include <sys/types.h>
  #include <sys/vfs.h>
  #include <sys/wait.h>
+ #include <sys/timerfd.h>
+ #include <sys/eventfd.h>
  #include <utime.h>
  #include <poll.h>
 
@@ -243,6 +245,8 @@
  #include <sys/types.h>
  #include <sys/user.h>
  #include <sys/wait.h>
+ #include <sys/timerfd.h>
+ #include <sys/eventfd.h>
  #include <utime.h>
  #include <poll.h>
 
@@ -265,11 +269,13 @@
  #include <dirent.h>
  #include <fnmatch.h>
  #include <sys/wait.h>
+ #include <sys/timerfd.h>
+ #include <sys/eventfd.h>
  #include <android/api-level.h>
  #include <poll.h>
 
- // If you are getting include errors here, then you to re-build the Projucer
- // and re-save your .jucer file.
+ // If you are getting include errors here, then you need to re-build
+ // the Projucer and re-save your .jucer file.
  #include <cpu-features.h>
 #endif
 

modules/juce_core/native/juce_FileDescriptor_linux.cpp

@@ -0,0 +1,159 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class FileDescriptor
+{
+public:
+    explicit FileDescriptor (int fileDescriptorId)
+        : id { fileDescriptorId } {}
+
+    ~FileDescriptor()
+    {
+        if (isValid())
+            close (id);
+    }
+
+    bool isValid() const { return id >= 0; }
+    int get() const { return id; }
+
+    template <typename DataType>
+    DataType readData() const
+    {
+        if (! isValid())
+            return {};
+
+        alignas (DataType) std::array<std::byte, sizeof (DataType)> buffer;
+        size_t numberOfBytesRead { 0 };
+
+        while (numberOfBytesRead < buffer.size())
+        {
+            const auto result = read (get(), buffer.data() + numberOfBytesRead, buffer.size() - numberOfBytesRead);
+
+            if (result < 0)
+                return {};
+
+            numberOfBytesRead += (size_t) result;
+        }
+
+        return readUnaligned<DataType> (buffer.data());
+    }
+
+    template <typename DataType>
+    void writeData (const DataType& value) const
+    {
+        if (! isValid())
+            return;
+
+        alignas (DataType) std::array<std::byte, sizeof (DataType)> buffer;
+        writeUnaligned (buffer.data(), value);
+        size_t numberOfBytesWritten { 0 };
+
+        while (numberOfBytesWritten < buffer.size())
+        {
+            const auto result = write (get(), buffer.data() + numberOfBytesWritten, buffer.size() - numberOfBytesWritten);
+
+            if (result < 0)
+                return;
+
+            numberOfBytesWritten += (size_t) result;
+        }
+    }
+
+private:
+    int id{};
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FileDescriptor)
+    JUCE_DECLARE_NON_MOVEABLE (FileDescriptor)
+};
+
+class EventFd
+{
+public:
+    EventFd() = default;
+    void signal() const { fd.writeData ((uint64_t) 1); }
+
+    int get() const { return fd.get(); }
+    bool isValid() const { return fd.isValid(); }
+
+private:
+    FileDescriptor fd { eventfd (0, EFD_CLOEXEC) };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (EventFd)
+    JUCE_DECLARE_NON_MOVEABLE (EventFd)
+};
+
+class TimerFd
+{
+public:
+    TimerFd() = default;
+
+    bool setIntervalMs (int ms) const
+    {
+        if (! fd.isValid())
+            return false;
+
+        jassert (ms >= 0);
+
+        const auto seconds = ms / 1'000;
+        const auto nanoseconds = (ms % 1'000) * 1'000'000;
+
+        const itimerspec spec
+        {
+            { seconds, nanoseconds },
+            { seconds, nanoseconds }
+        };
+
+        return timerfd_settime (fd.get(), 0, &spec, nullptr) == 0;
+    }
+
+    int getIntervalMs() const
+    {
+        if (! fd.isValid())
+            return 0;
+
+        itimerspec result{};
+
+        if (timerfd_gettime (fd.get(), &result) != 0)
+            return 0;
+
+        return static_cast<int> (result.it_interval.tv_sec * 1'000 + result.it_interval.tv_nsec / 1'000'000);
+    }
+
+    int getAndClearNumberOfExpirations() const
+    {
+        return (int) fd.readData<uint64_t>();
+    }
+
+    int get() const { return fd.get(); }
+    bool isValid() const { return fd.isValid(); }
+
+private:
+    FileDescriptor fd { timerfd_create (CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK) };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TimerFd)
+    JUCE_DECLARE_NON_MOVEABLE (TimerFd)
+};
+
+} // namespace juce

modules/juce_core/native/juce_HighResolutionTimerThread.h

@@ -0,0 +1,63 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class HighResolutionTimerThread final : private Thread
+{
+public:
+    struct Impl
+    {
+        virtual ~Impl() = default;
+        virtual void runThread() = 0;
+        virtual void signalThreadShouldExit() = 0;
+    };
+
+    HighResolutionTimerThread (Impl& implementation)
+        : Thread { "HighResolutionTimerThread" },
+          impl { implementation }
+    {
+        startThread (Thread::Priority::highest);
+    }
+
+    ~HighResolutionTimerThread() override
+    {
+        impl.signalThreadShouldExit();
+        waitForThreadToExit (-1);
+    }
+
+    bool isRunning() const { return isThreadRunning(); }
+
+private:
+    void run() override
+    {
+        impl.runThread();
+    }
+
+    Impl& impl;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (HighResolutionTimerThread)
+    JUCE_DECLARE_NON_MOVEABLE (HighResolutionTimerThread)
+};
+
+} // namespace juce

modules/juce_core/native/juce_PlatformTimerListener.h

@@ -0,0 +1,32 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+struct PlatformTimerListener
+{
+    virtual ~PlatformTimerListener() = default;
+    virtual void onTimerExpired (int numberOfExpirations) = 0;
+};
+
+} // namespace juce

modules/juce_core/native/juce_PlatformTimer_linux.cpp

@@ -0,0 +1,88 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class PlatformTimer final : private HighResolutionTimerThread::Impl
+{
+public:
+    explicit PlatformTimer (PlatformTimerListener& ptl)
+        : listener { ptl } {}
+
+    void startTimer (int newIntervalMs)
+    {
+        timer.setIntervalMs (newIntervalMs);
+    }
+
+    void cancelTimer()
+    {
+        startTimer (0);
+    }
+
+    int getIntervalMs() const
+    {
+        return thread.isRunning() ? timer.getIntervalMs() : 0;
+    }
+
+private:
+    void runThread() override
+    {
+        if (! (timer.isValid() && exitThread.isValid()))
+            return;
+
+        pollfd pollData[]
+        {
+            { timer.get(),        POLLIN, 0 },
+            { exitThread.get(),   POLLIN, 0 }
+        };
+
+        const auto& [timerPollData, exitThreadPollData] = pollData;
+
+        for (;;)
+        {
+            if (poll (pollData, numElementsInArray (pollData), -1) <= 0)
+                return;
+
+            if (exitThreadPollData.revents & POLLIN)
+                return;
+
+            if (timerPollData.revents & POLLIN)
+                listener.onTimerExpired (timer.getAndClearNumberOfExpirations());
+        }
+    }
+
+    void signalThreadShouldExit() override
+    {
+        exitThread.signal();
+    }
+
+    PlatformTimerListener& listener;
+    const TimerFd timer;
+    const EventFd exitThread;
+    HighResolutionTimerThread thread { *this };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PlatformTimer)
+    JUCE_DECLARE_NON_MOVEABLE (PlatformTimer)
+};
+
+}

modules/juce_core/native/juce_PlatformTimer_mac.mm

@@ -0,0 +1,118 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class PlatformTimer final : private HighResolutionTimerThread::Impl
+{
+public:
+    explicit PlatformTimer (PlatformTimerListener& ptl)
+        : listener { ptl } {}
+
+    void startTimer (int newIntervalMs)
+    {
+        jassert (newIntervalMs > 0);
+        jassert (timer == nullptr);
+
+        if (runLoop == nullptr)
+            return;
+
+        const auto intervalSeconds = static_cast<double> (newIntervalMs) / 1'000.0;
+
+        CFRunLoopTimerContext context{};
+        context.info = &listener;
+
+        const auto callback = [] (CFRunLoopTimerRef, void* ctx)
+        {
+            static_cast<PlatformTimerListener*> (ctx)->onTimerExpired (1);
+        };
+
+        timer.reset (CFRunLoopTimerCreate (kCFAllocatorDefault,
+                                           intervalSeconds + CFAbsoluteTimeGetCurrent(),
+                                           intervalSeconds,
+                                           0,
+                                           0,
+                                           callback,
+                                           &context));
+
+        CFRunLoopAddTimer (runLoop, timer.get(), kCFRunLoopDefaultMode);
+    }
+
+    void cancelTimer()
+    {
+        jassert (runLoop != nullptr);
+        jassert (timer != nullptr);
+
+        CFRunLoopRemoveTimer (runLoop, timer.get(), kCFRunLoopDefaultMode);
+        timer.reset();
+    }
+
+    int getIntervalMs() const
+    {
+        return timer != nullptr ? (int) (CFRunLoopTimerGetInterval (timer.get()) * 1'000.0) : 0;
+    }
+
+private:
+    static void preventRunLoopFromEarlyExits()
+    {
+        CFRunLoopSourceContext context{};
+        CFRunLoopAddSource (CFRunLoopGetCurrent(),
+                            CFRunLoopSourceCreate (kCFAllocatorDefault, 0, &context),
+                            kCFRunLoopDefaultMode);
+    }
+
+    void setRunLoop()
+    {
+        CFRunLoopPerformBlock (CFRunLoopGetCurrent(), kCFRunLoopDefaultMode, ^()
+        {
+            runLoopPromise.set_value (CFRunLoopGetCurrent());
+        });
+    }
+
+    void runThread() override
+    {
+        preventRunLoopFromEarlyExits();
+        setRunLoop();
+        CFRunLoopRun();
+    }
+
+    void signalThreadShouldExit() override
+    {
+        if (runLoop != nullptr)
+            CFRunLoopStop (runLoop);
+    }
+
+    PlatformTimerListener& listener;
+    CFUniquePtr<CFRunLoopTimerRef> timer;
+    std::promise<CFRunLoopRef> runLoopPromise;
+    HighResolutionTimerThread thread { *this };
+    CFRunLoopRef runLoop = [&]() -> CFRunLoopRef
+    {
+       return thread.isRunning() ? runLoopPromise.get_future().get() : nullptr;
+    }();
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PlatformTimer)
+    JUCE_DECLARE_NON_MOVEABLE (PlatformTimer)
+};
+
+} // namespace juce

modules/juce_core/native/juce_PlatformTimer_wasm.cpp

@@ -0,0 +1,111 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class PlatformTimer final : private HighResolutionTimerThread::Impl
+{
+public:
+    explicit PlatformTimer (PlatformTimerListener& ptl)
+        : listener { ptl } {}
+
+    void startTimer (int newIntervalMs)
+    {
+        if (! thread.isRunning())
+            return;
+
+        {
+            std::scoped_lock lock { mutex };
+            intervalMs = newIntervalMs;
+            nextEventTime = Time::getCurrentTime() + RelativeTime::milliseconds (newIntervalMs);
+        }
+
+        event.signal();
+    }
+
+    void cancelTimer()
+    {
+        jassert (thread.isRunning());
+
+        {
+            std::scoped_lock lock { mutex };
+            jassert (intervalMs > 0);
+            intervalMs = 0;
+        }
+
+        event.signal();
+    }
+
+    int getIntervalMs() const
+    {
+        std::scoped_lock lock { mutex };
+        return thread.isRunning() ? intervalMs : 0;
+    }
+
+private:
+    int millisecondsUntilNextEvent()
+    {
+        std::scoped_lock lock { mutex };
+        return intervalMs > 0 ? jmax (0, (int) (nextEventTime - Time::getCurrentTime()).inMilliseconds()) : -1;
+    }
+
+    bool nextEvent()
+    {
+        std::scoped_lock lock { mutex };
+        if (intervalMs <= 0 || nextEventTime > Time::getCurrentTime())
+            return false;
+
+        nextEventTime += RelativeTime::milliseconds (intervalMs);
+        return true;
+    }
+
+    void runThread() override
+    {
+        while (! shouldExitThread.load())
+        {
+            if (nextEvent())
+                listener.onTimerExpired (1);
+            else
+                event.wait (millisecondsUntilNextEvent());
+        }
+    }
+
+    void signalThreadShouldExit() override
+    {
+        shouldExitThread.store (true);
+        event.signal();
+    }
+
+    PlatformTimerListener& listener;
+    mutable std::mutex mutex;
+    int intervalMs{};
+    Time nextEventTime;
+    WaitableEvent event;
+    std::atomic<bool> shouldExitThread { false };
+    HighResolutionTimerThread thread { *this };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PlatformTimer)
+    JUCE_DECLARE_NON_MOVEABLE (PlatformTimer)
+};
+
+} // namespace juce

modules/juce_core/native/juce_PlatformTimer_windows.cpp

@@ -0,0 +1,68 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2022 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+class PlatformTimer final
+{
+public:
+    explicit PlatformTimer (PlatformTimerListener& ptl)
+        : listener { ptl } {}
+
+    void startTimer (int newIntervalMs)
+    {
+        jassert (newIntervalMs > 0);
+
+        const auto callback = [] (UINT, UINT, DWORD_PTR context, DWORD_PTR, DWORD_PTR)
+        {
+            reinterpret_cast<PlatformTimerListener*> (context)->onTimerExpired (1);
+        };
+
+        timerId = timeSetEvent ((UINT) newIntervalMs, 1, callback, (DWORD_PTR) &listener, TIME_PERIODIC | TIME_CALLBACK_FUNCTION);
+        intervalMs = timerId != 0 ? newIntervalMs : 0;
+    }
+
+    void cancelTimer()
+    {
+        jassert (timerId != 0);
+
+        timeKillEvent (timerId);
+        timerId = 0;
+        intervalMs = 0;
+    }
+
+    int getIntervalMs() const
+    {
+        return intervalMs;
+    }
+
+private:
+    PlatformTimerListener& listener;
+    UINT timerId { 0 };
+    int intervalMs { 0 };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (PlatformTimer)
+    JUCE_DECLARE_NON_MOVEABLE (PlatformTimer)
+};
+
+} // namespace juce

modules/juce_core/native/juce_SharedCode_posix.h

@@ -854,7 +854,7 @@ class PosixThreadAttribute
 public:
     explicit PosixThreadAttribute (size_t stackSize)
     {
-        if (valid)
+        if (valid && stackSize != 0)
             pthread_attr_setstacksize (&attr, stackSize);
     }
 
@@ -963,7 +963,9 @@ static void* makeThreadHandle (PosixThreadAttribute& attr, Thread* userData, voi
 {
     pthread_t handle = {};
 
-    if (pthread_create (&handle, attr.get(), threadEntryProc, userData) != 0)
+    const auto status = pthread_create (&handle, attr.get(), threadEntryProc, userData);
+
+    if (status != 0)
         return nullptr;
 
     pthread_detach (handle);

modules/juce_core/native/juce_Threads_android.cpp

@@ -448,6 +448,4 @@ JUCE_API bool JUCE_CALLTYPE juce_isRunningUnderDebugger() noexcept
 JUCE_API void JUCE_CALLTYPE Process::raisePrivilege() {}
 JUCE_API void JUCE_CALLTYPE Process::lowerPrivilege() {}
 
-
-
 } // namespace juce

modules/juce_core/threads/juce_HighResolutionTimer.cpp

@@ -23,98 +23,409 @@
 namespace juce
 {
 
-class HighResolutionTimer::Pimpl : public Thread
+//==============================================================================
+class HighResolutionTimer::Impl : private PlatformTimerListener
 {
-    using steady_clock = std::chrono::steady_clock;
-    using milliseconds = std::chrono::milliseconds;
-
 public:
-    explicit Pimpl (HighResolutionTimer& ownerRef)
-        : Thread ("HighResolutionTimerThread"),
-          owner (ownerRef)
-    {
-    }
-
-    using Thread::isThreadRunning;
+    explicit Impl (HighResolutionTimer& o)
+        : owner { o } {}
 
-    void start (int periodMs)
+    void startTimer (int newIntervalMs)
     {
+        shouldCancelCallbacks.store (true);
+
+        const auto shouldWaitForPendingCallbacks = [&]
         {
-            const std::scoped_lock lk { mutex };
-            periodMillis = periodMs;
-            nextTickTime = steady_clock::now() + milliseconds (periodMillis);
-        }
+            const std::scoped_lock lock { timerMutex };
 
-        waitEvent.notify_one();
+            if (timer.getIntervalMs() > 0)
+                timer.cancelTimer();
 
-        if (! isThreadRunning())
-            startThread (Thread::Priority::high);
-    }
+            if (newIntervalMs > 0)
+                timer.startTimer (jmax (0, newIntervalMs));
 
-    void stop()
-    {
-        {
-            const std::scoped_lock lk { mutex };
-            periodMillis = 0;
-        }
+            return callbackThreadId != std::this_thread::get_id()
+                && timer.getIntervalMs() <= 0;
+        }();
 
-        waitEvent.notify_one();
+        if (shouldWaitForPendingCallbacks)
+            std::scoped_lock lock { callbackMutex };
+    }
 
-        if (Thread::getCurrentThreadId() != getThreadId())
-            stopThread (-1);
+    int getIntervalMs() const
+    {
+        const std::scoped_lock lock { timerMutex };
+        return timer.getIntervalMs();
     }
 
-    int getPeriod() const
+    bool isTimerRunning() const
     {
-        return periodMillis;
+        return getIntervalMs() > 0;
     }
 
 private:
-    void run() override
+    void onTimerExpired (int numberOfExpirations) final
     {
-        for (;;)
-        {
-            {
-                std::unique_lock lk { mutex };
+        callbackThreadId.store (std::this_thread::get_id());
 
-                if (waitEvent.wait_until (lk, nextTickTime, [this] { return periodMillis == 0; }))
-                    break;
+        std::scoped_lock lock { callbackMutex };
 
-                nextTickTime = steady_clock::now() + milliseconds (periodMillis);
-            }
+        shouldCancelCallbacks.store (! isTimerRunning());
 
-            owner.hiResTimerCallback();
+        for (int i = 0; i < numberOfExpirations && ! shouldCancelCallbacks.load(); ++i)
+        {
+            try
+            {
+                owner.hiResTimerCallback();
+            }
+            catch (...)
+            {
+                // Exceptions thrown in a timer callback won't be
+                // propagated to the main thread, it's best to find a
+                // way to avoid them if possible
+                jassertfalse;
+            }
         }
+
+        callbackThreadId.store ({});
     }
 
     HighResolutionTimer& owner;
-    std::atomic<int> periodMillis { 0 };
-    steady_clock::time_point nextTickTime;
-    std::mutex mutex;
-    std::condition_variable waitEvent;
+    mutable std::mutex timerMutex;
+    std::mutex callbackMutex;
+    std::atomic<std::thread::id> callbackThreadId{};
+    std::atomic<bool> shouldCancelCallbacks { false };
+    PlatformTimer timer { *this };
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Impl)
+    JUCE_DECLARE_NON_MOVEABLE (Impl)
 };
 
+//==============================================================================
 HighResolutionTimer::HighResolutionTimer()
-    : pimpl (new Pimpl (*this))
-{
-}
+    : impl (std::make_unique<Impl> (*this)) {}
 
 HighResolutionTimer::~HighResolutionTimer()
 {
+    // You *must* call stopTimer from the derived class destructor to
+    // avoid data races on the timer's vtable
+    jassert (! isTimerRunning());
     stopTimer();
 }
 
-void HighResolutionTimer::startTimer (int periodMs)
+void HighResolutionTimer::startTimer (int newIntervalMs)
 {
-    pimpl->start (jmax (1, periodMs));
+    impl->startTimer (newIntervalMs);
 }
 
 void HighResolutionTimer::stopTimer()
 {
-    pimpl->stop();
+    impl->startTimer (0);
+}
+
+int HighResolutionTimer::getTimerInterval() const noexcept
+{
+    return impl->getIntervalMs();
 }
 
-bool HighResolutionTimer::isTimerRunning() const noexcept     { return getTimerInterval() != 0; }
-int HighResolutionTimer::getTimerInterval() const noexcept    { return pimpl->getPeriod(); }
+bool HighResolutionTimer::isTimerRunning() const noexcept
+{
+    return impl->isTimerRunning();
+}
+
+//==============================================================================
+#if JUCE_UNIT_TESTS
+
+class HighResolutionTimerTests : public UnitTest
+{
+public:
+    HighResolutionTimerTests()
+        : UnitTest ("HighResolutionTimer", UnitTestCategories::threads) {}
+
+    void runTest() override
+    {
+        constexpr int maximumTimeoutMs {30'000};
+
+        beginTest ("Start/stop a timer");
+        {
+            WaitableEvent timerFiredOnce;
+            WaitableEvent timerFiredTwice;
+
+            Timer timer {[&, callbackCount = 0] () mutable
+            {
+                switch (++callbackCount)
+                {
+                    case 1: timerFiredOnce.signal(); return;
+                    case 2: timerFiredTwice.signal(); return;
+                    default: return;
+                }
+            }};
+
+            expect (! timer.isTimerRunning());
+            expect (timer.getTimerInterval() == 0);
+
+            timer.startTimer (1);
+            expect (timer.isTimerRunning());
+            expect (timer.getTimerInterval() == 1);
+            expect (timerFiredOnce.wait (maximumTimeoutMs));
+            expect (timerFiredTwice.wait (maximumTimeoutMs));
+
+            timer.stopTimer();
+            expect (! timer.isTimerRunning());
+            expect (timer.getTimerInterval() == 0);
+        }
+
+        beginTest ("Stop a timer from the timer callback");
+        {
+            WaitableEvent stoppedTimer;
+
+            auto timerCallback = [&](Timer& timer)
+            {
+                expect (timer.isTimerRunning());
+                timer.stopTimer();
+                expect (! timer.isTimerRunning());
+                stoppedTimer.signal();
+            };
+
+            Timer timer {[&]{ timerCallback (timer); }};
+            timer.startTimer (1);
+            expect (stoppedTimer.wait (maximumTimeoutMs));
+        }
+
+        beginTest ("Restart a timer from the timer callback");
+        {
+            WaitableEvent restartTimer;
+            WaitableEvent timerRestarted;
+            WaitableEvent timerFiredAfterRestart;
+
+            Timer timer {[&, callbackCount = 0] () mutable
+            {
+                switch (++callbackCount)
+                {
+                    case 1:
+                        expect (restartTimer.wait (maximumTimeoutMs));
+                        expect (timer.getTimerInterval() == 1);
+
+                        timer.startTimer (2);
+                        expect (timer.getTimerInterval() == 2);
+                        timerRestarted.signal();
+                        return;
+
+                    case 2:
+                        expect (timer.getTimerInterval() == 2);
+                        timerFiredAfterRestart.signal();
+                        return;
+
+                    default:
+                        return;
+                }
+            }};
+
+            timer.startTimer (1);
+            expect (timer.getTimerInterval() == 1);
+
+            restartTimer.signal();
+            expect (timerRestarted.wait (maximumTimeoutMs));
+            expect (timer.getTimerInterval() == 2);
+            expect (timerFiredAfterRestart.wait (maximumTimeoutMs));
+
+            timer.stopTimer();
+        }
+
+        beginTest ("Calling stopTimer on a timer, waits for any timer callbacks to finish");
+        {
+            WaitableEvent timerCallbackStarted;
+            WaitableEvent stoppingTimer;
+            std::atomic<bool> timerCallbackFinished { false };
+
+            Timer timer {[&, callbackCount = 0] () mutable
+            {
+                switch (++callbackCount)
+                {
+                    case 1:
+                        timerCallbackStarted.signal();
+                        expect (stoppingTimer.wait (maximumTimeoutMs));
+                        Thread::sleep (10);
+                        timerCallbackFinished = true;
+                        return;
+
+                    default:
+                        return;
+                }
+            }};
+
+            timer.startTimer (1);
+            expect (timerCallbackStarted.wait (maximumTimeoutMs));
+
+            stoppingTimer.signal();
+            timer.stopTimer();
+            expect (timerCallbackFinished);
+        }
+
+        beginTest ("Calling stopTimer on a timer, waits for any timer callbacks to finish, even if the timer callback calls stopTimer first");
+        {
+            WaitableEvent stoppedFromInsideTimerCallback;
+            WaitableEvent stoppingFromOutsideTimerCallback;
+            std::atomic<bool> timerCallbackFinished { false };
+
+            Timer timer {[&]()
+            {
+                timer.stopTimer();
+                stoppedFromInsideTimerCallback.signal();
+                expect (stoppingFromOutsideTimerCallback.wait (maximumTimeoutMs));
+                Thread::sleep (10);
+                timerCallbackFinished = true;
+
+            }};
+
+            timer.startTimer (1);
+            expect (stoppedFromInsideTimerCallback.wait (maximumTimeoutMs));
+
+            stoppingFromOutsideTimerCallback.signal();
+            timer.stopTimer();
+            expect (timerCallbackFinished);
+        }
+
+        beginTest ("Adjusting a timer period from outside the timer callback doesn't cause data races");
+        {
+            WaitableEvent timerCallbackStarted;
+            WaitableEvent timerRestarted;
+            WaitableEvent timerFiredAfterRestart;
+            std::atomic<int> lastCallbackCount {0};
+
+            Timer timer {[&, callbackCount = 0] () mutable
+            {
+                switch (++callbackCount)
+                {
+                    case 1:
+                        expect (timer.getTimerInterval() == 1);
+                        timerCallbackStarted.signal();
+                        Thread::sleep (10);
+                        lastCallbackCount = 1;
+                        return;
+
+                    case 2:
+                        expect (timerRestarted.wait (maximumTimeoutMs));
+                        expect (timer.getTimerInterval() == 2);
+                        lastCallbackCount = 2;
+                        timerFiredAfterRestart.signal();
+                        return;
+
+                    default:
+                        return;
+                }
+            }};
+
+            timer.startTimer (1);
+            expect (timerCallbackStarted.wait (maximumTimeoutMs));
+
+            timer.startTimer (2);
+            timerRestarted.signal();
+
+            expect (timerFiredAfterRestart.wait (maximumTimeoutMs));
+            expect (lastCallbackCount == 2);
+
+            timer.stopTimer();
+            expect (lastCallbackCount == 2);
+        }
+
+        beginTest ("A timer can be restarted externally, after being stopped internally");
+        {
+            WaitableEvent timerStopped;
+            WaitableEvent timerFiredAfterRestart;
+
+            Timer timer {[&, callbackCount = 0] () mutable
+            {
+                switch (++callbackCount)
+                {
+                    case 1:
+                        timer.stopTimer();
+                        timerStopped.signal();
+                        return;
+
+                    case 2:
+                        timerFiredAfterRestart.signal();
+                        return;
+
+                    default:
+                        return;
+                }
+            }};
+
+            expect (! timer.isTimerRunning());
+            timer.startTimer (1);
+            expect (timer.isTimerRunning());
+
+            expect (timerStopped.wait (maximumTimeoutMs));
+            expect (! timer.isTimerRunning());
+
+            timer.startTimer (1);
+            expect (timer.isTimerRunning());
+            expect (timerFiredAfterRestart.wait (maximumTimeoutMs));
+        }
+
+        beginTest ("Calls to `startTimer` and `getTimerInterval` succeed while a callback is blocked");
+        {
+            WaitableEvent timerBlocked;
+            WaitableEvent unblockTimer;
+
+            Timer timer {[&]
+            {
+                timerBlocked.signal();
+                unblockTimer.wait();
+                timer.stopTimer();
+            }};
+
+            timer.startTimer (1);
+            timerBlocked.wait();
+
+            expect (timer.getTimerInterval() == 1);
+            timer.startTimer (2);
+            expect (timer.getTimerInterval() == 2);
+
+            unblockTimer.signal();
+            timer.stopTimer();
+        }
+
+        beginTest ("Stress test");
+        {
+            constexpr auto maxNumTimers { 100 };
+
+            std::vector<std::unique_ptr<Timer>> timers;
+            timers.reserve (maxNumTimers);
+
+            for (int i = 0; i < maxNumTimers; ++i)
+            {
+                auto timer = std::make_unique<Timer> ([]{});
+                timer->startTimer (1);
+
+                if (! timer->isTimerRunning())
+                    break;
+
+                timers.push_back (std::move (timer));
+            }
+
+            expect (timers.size() >= 16);
+        }
+    }
+
+    class Timer : public HighResolutionTimer
+    {
+    public:
+        explicit Timer (std::function<void()> fn)
+            : callback (std::move (fn)) {}
+
+        ~Timer() override { stopTimer(); }
+
+        void hiResTimerCallback() override { callback(); }
+
+    private:
+        std::function<void()> callback;
+    };
+};
+
+static HighResolutionTimerTests highResolutionTimerTests;
+
+#endif
 
 } // namespace juce

modules/juce_core/threads/juce_HighResolutionTimer.h

@@ -32,8 +32,8 @@ namespace juce
 
     You should only use this class in situations where you really need accuracy,
     because unlike the normal Timer class, which is very lightweight and cheap
-    to start/stop, the HighResolutionTimer will use far more resources, and
-    starting/stopping it may involve launching and killing threads.
+    the HighResolutionTimer will use far more resources and require thread
+    safety considerations.
 
     @see Timer
 
@@ -57,20 +57,29 @@ public:
         This will be called on a dedicated timer thread, so make sure your
         implementation is thread-safe!
 
+        On some platforms the dedicated timer thread may be shared with
+        other HighResolutionTimer's so aim to complete any work in this
+        callback as fast as possible.
+
         It's perfectly ok to call startTimer() or stopTimer() from within this
-        callback to change the subsequent intervals.
+        callback to change the subsequent intervals. However, if you call
+        stopTimer() in the callback it's still best practice to call stopTimer()
+        from the destructor in order to avoid data races.
     */
     virtual void hiResTimerCallback() = 0;
 
     //==============================================================================
     /** Starts the timer and sets the length of interval required.
 
-        If the timer is already started, this will reset its counter, so the
-        time between calling this method and the next timer callback will not be
-        less than the interval length passed in.
+        If the timer has already started, this will reset the timer, so the
+        time between calling this method and the next timer callback
+        will not be less than the interval length passed in.
+
+        In exceptional circumstances the dedicated timer thread may not start,
+        if this is a potential concern for your use case, you can call isTimerRunning()
+        to confirm if the timer actually started.
 
-        @param  intervalInMilliseconds  the interval to use (any values less than 1 will be
-                                        rounded up to 1)
+        @param  intervalInMilliseconds  the interval to use (a value of zero or less will stop the timer)
     */
     void startTimer (int intervalInMilliseconds);
 
@@ -79,6 +88,9 @@ public:
         This method may block while it waits for pending callbacks to complete. Once it
         returns, no more callbacks will be made. If it is called from the timer's own thread,
         it will cancel the timer after the current callback returns.
+
+        To prevent data races it's normally best practice to call this in the derived classes
+        destructor, even if stopTimer() was called in the hiResTimerCallback().
     */
     void stopTimer();
 
@@ -93,8 +105,8 @@ public:
     int getTimerInterval() const noexcept;
 
 private:
-    class Pimpl;
-    std::unique_ptr<Pimpl> pimpl;
+    class Impl;
+    std::unique_ptr<Impl> impl;
 
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (HighResolutionTimer)
 };