Couple of small fixes for mac midi and win32 threads, and fixed a memory leak in the demo app.

extras/juce demo/src/demos/RenderingTestComponent.cpp

@@ -35,6 +35,7 @@ public:
     {
         setOpaque (true);
         averageTime = 0;
+        svgDrawable = 0;
 
         rgbImage = ImageFileFormat::loadFrom (RenderingTestComponent::demoJpeg_jpg, RenderingTestComponent::demoJpeg_jpgSize);
         argbImage = ImageFileFormat::loadFrom (RenderingTestComponent::demoPng_png, RenderingTestComponent::demoPng_pngSize);
@@ -334,7 +335,7 @@ private:
 
     void createSVGDrawable()
     {
-        svgDrawable = 0;
+        deleteAndZero (svgDrawable);
 
         MemoryInputStream iconsFileStream (BinaryData::icons_zip, BinaryData::icons_zipSize, false);
         ZipFile icons (&iconsFileStream, false);

juce_amalgamated.cpp

@@ -234198,7 +234198,7 @@ bool InterProcessLock::enter (const int timeOutMillisecs) throw()
 {
     if (reentrancyLevel++ == 0)
     {
-        internal = CreateMutex (0, TRUE, name);
+        internal = CreateMutex (0, TRUE, "Global\\" + name);
 
         if (internal != 0 && GetLastError() == ERROR_ALREADY_EXISTS)
         {
@@ -264828,8 +264828,8 @@ static bool makeSureClientExists()
 class MidiPortAndEndpoint
 {
 public:
-    MidiPortAndEndpoint (MIDIPortRef port, MIDIEndpointRef endpoint) throw()
-        : port (port), endPoint (endpoint)
+    MidiPortAndEndpoint (MIDIPortRef port_, MIDIEndpointRef endPoint_) throw()
+        : port (port_), endPoint (endPoint_)
     {
     }
 
@@ -264838,7 +264838,7 @@ public:
         if (port != 0)
             MIDIPortDispose (port);
 
-        if (endPoint != 0)
+        if (port == 0 && endPoint != 0) // if port == 0, it means we created the endpoint, so it's safe to delete it
             MIDIEndpointDispose (endPoint);
     }
 
@@ -272540,8 +272540,8 @@ static bool makeSureClientExists()
 class MidiPortAndEndpoint
 {
 public:
-    MidiPortAndEndpoint (MIDIPortRef port, MIDIEndpointRef endpoint) throw()
-        : port (port), endPoint (endpoint)
+    MidiPortAndEndpoint (MIDIPortRef port_, MIDIEndpointRef endPoint_) throw()
+        : port (port_), endPoint (endPoint_)
     {
     }
 
@@ -272550,7 +272550,7 @@ public:
         if (port != 0)
             MIDIPortDispose (port);
 
-        if (endPoint != 0)
+        if (port == 0 && endPoint != 0) // if port == 0, it means we created the endpoint, so it's safe to delete it
             MIDIEndpointDispose (endPoint);
     }
 

src/native/mac/juce_mac_CoreMidi.cpp

@@ -236,8 +236,8 @@ static bool makeSureClientExists()
 class MidiPortAndEndpoint
 {
 public:
-    MidiPortAndEndpoint (MIDIPortRef port, MIDIEndpointRef endpoint) throw()
-        : port (port), endPoint (endpoint)
+    MidiPortAndEndpoint (MIDIPortRef port_, MIDIEndpointRef endPoint_) throw()
+        : port (port_), endPoint (endPoint_)
     {
     }
 
@@ -246,7 +246,7 @@ public:
         if (port != 0)
             MIDIPortDispose (port);
 
-        if (endPoint != 0)
+        if (port == 0 && endPoint != 0) // if port == 0, it means we created the endpoint, so it's safe to delete it
             MIDIEndpointDispose (endPoint);
     }
 

src/native/windows/juce_win32_Threads.cpp

@@ -357,7 +357,7 @@ bool InterProcessLock::enter (const int timeOutMillisecs) throw()
 {
     if (reentrancyLevel++ == 0)
     {
-        internal = CreateMutex (0, TRUE, name);
+        internal = CreateMutex (0, TRUE, "Global\\" + name);
 
         if (internal != 0 && GetLastError() == ERROR_ALREADY_EXISTS)
         {