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tags/2021-05-28
jules 18 years ago
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      build/macosx/platform_specific_code/juce_mac_Threads.cpp

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- 386
build/macosx/platform_specific_code/juce_mac_Threads.cpp View File

@@ -1,386 +1,387 @@
/*
==============================================================================
This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-7 by Raw Material Software ltd.
------------------------------------------------------------------------------
JUCE can be redistributed and/or modified under the terms of the
GNU General Public License, as published by the Free Software Foundation;
either version 2 of the License, or (at your option) any later version.
JUCE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with JUCE; if not, visit www.gnu.org/licenses or write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
------------------------------------------------------------------------------
If you'd like to release a closed-source product which uses JUCE, commercial
licenses are also available: visit www.rawmaterialsoftware.com/juce for
more information.
==============================================================================
*/
#include "../../../src/juce_core/basics/juce_StandardHeader.h"
#include <pthread.h>
#include <sched.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/ptrace.h>
#include <Carbon/Carbon.h>
BEGIN_JUCE_NAMESPACE
#include "../../../src/juce_core/threads/juce_CriticalSection.h"
#include "../../../src/juce_core/threads/juce_WaitableEvent.h"
#include "../../../src/juce_core/threads/juce_Thread.h"
#include "../../../src/juce_core/threads/juce_Process.h"
#include "../../../src/juce_core/threads/juce_InterProcessLock.h"
#include "../../../src/juce_core/misc/juce_PlatformUtilities.h"
#include "../../../src/juce_core/io/files/juce_File.h"
//==============================================================================
CriticalSection::CriticalSection() throw()
{
pthread_mutexattr_t atts;
pthread_mutexattr_init (&atts);
pthread_mutexattr_settype (&atts, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init (&internal, &atts);
}
CriticalSection::~CriticalSection() throw()
{
pthread_mutex_destroy (&internal);
}
void CriticalSection::enter() const throw()
{
pthread_mutex_lock (&internal);
}
bool CriticalSection::tryEnter() const throw()
{
return pthread_mutex_trylock (&internal) == 0;
}
void CriticalSection::exit() const throw()
{
pthread_mutex_unlock (&internal);
}
//==============================================================================
struct EventStruct
{
pthread_cond_t condition;
pthread_mutex_t mutex;
bool triggered;
};
WaitableEvent::WaitableEvent() throw()
{
EventStruct* const es = new EventStruct();
es->triggered = false;
pthread_cond_init (&es->condition, 0);
pthread_mutex_init (&es->mutex, 0);
internal = es;
}
WaitableEvent::~WaitableEvent() throw()
{
EventStruct* const es = (EventStruct*) internal;
pthread_cond_destroy (&es->condition);
pthread_mutex_destroy (&es->mutex);
delete es;
}
bool WaitableEvent::wait (const int timeOutMillisecs) const throw()
{
EventStruct* const es = (EventStruct*) internal;
bool ok = true;
pthread_mutex_lock (&es->mutex);
if (! es->triggered)
{
if (timeOutMillisecs < 0)
{
pthread_cond_wait (&es->condition, &es->mutex);
}
else
{
struct timespec time;
time.tv_sec = timeOutMillisecs / 1000;
time.tv_nsec = (timeOutMillisecs % 1000) * 1000000;
pthread_cond_timedwait_relative_np (&es->condition, &es->mutex, &time);
}
ok = es->triggered;
}
es->triggered = false;
pthread_mutex_unlock (&es->mutex);
return ok;
}
void WaitableEvent::signal() const throw()
{
EventStruct* const es = (EventStruct*) internal;
pthread_mutex_lock (&es->mutex);
es->triggered = true;
pthread_cond_broadcast (&es->condition);
pthread_mutex_unlock (&es->mutex);
}
void WaitableEvent::reset() const throw()
{
EventStruct* const es = (EventStruct*) internal;
pthread_mutex_lock (&es->mutex);
es->triggered = false;
pthread_mutex_unlock (&es->mutex);
}
//==============================================================================
void JUCE_API juce_threadEntryPoint (void*);
void* threadEntryProc (void* userData) throw()
{
juce_threadEntryPoint (userData);
return 0;
}
void* juce_createThread (void* userData) throw()
{
pthread_t handle = 0;
if (pthread_create (&handle, 0, threadEntryProc, userData) == 0)
{
pthread_detach (handle);
return (void*) handle;
}
return 0;
}
void juce_killThread (void* handle) throw()
{
if (handle != 0)
pthread_cancel ((pthread_t) handle);
}
void juce_setCurrentThreadName (const String& /*name*/) throw()
{
}
int Thread::getCurrentThreadId() throw()
{
return (int) pthread_self();
}
void juce_setThreadPriority (void* handle, int priority) throw()
{
if (handle == 0)
handle = (void*) pthread_self();
struct sched_param param;
int policy;
pthread_getschedparam ((pthread_t) handle, &policy, &param);
param.sched_priority = jlimit (1, 127, 1 + (priority * 126) / 11);
pthread_setschedparam ((pthread_t) handle, policy, &param);
}
void Thread::yield() throw()
{
sched_yield();
}
void Thread::setCurrentThreadAffinityMask (const uint32 affinityMask) throw()
{
// xxx
jassertfalse
}
void JUCE_CALLTYPE Thread::sleep (int millisecs) throw()
{
struct timespec time;
time.tv_sec = millisecs / 1000;
time.tv_nsec = (millisecs % 1000) * 1000000;
nanosleep (&time, 0);
}
//==============================================================================
bool JUCE_CALLTYPE juce_isRunningUnderDebugger() throw()
{
static char testResult = 0;
if (testResult == 0)
{
testResult = (ptrace (PT_TRACE_ME, 0, 0, 0) < 0) ? 1 : -1;
if (testResult < 0)
ptrace (PT_DETACH, 0, (caddr_t) 1, 0);
}
return testResult > 0;
}
bool JUCE_CALLTYPE Process::isRunningUnderDebugger() throw()
{
return juce_isRunningUnderDebugger();
}
void Process::raisePrivilege()
{
jassertfalse
}
void Process::lowerPrivilege()
{
jassertfalse
}
void Process::terminate()
{
ExitToShell();
}
void Process::setPriority (ProcessPriority p)
{
// xxx
}
void* Process::loadDynamicLibrary (const String& name)
{
// xxx needs to use bundles
FSSpec fs;
if (PlatformUtilities::makeFSSpecFromPath (&fs, name))
{
CFragConnectionID connID;
Ptr mainPtr;
Str255 errorMessage;
Str63 nm;
PlatformUtilities::copyToStr63 (nm, name);
const OSErr err = GetDiskFragment (&fs, 0, kCFragGoesToEOF, nm, kReferenceCFrag, &connID, &mainPtr, errorMessage);
if (err == noErr)
return (void*)connID;
}
return 0;
}
void Process::freeDynamicLibrary (void* handle)
{
if (handle != 0)
CloseConnection ((CFragConnectionID*)&handle);
}
void* Process::getProcedureEntryPoint (void* h, const String& procedureName)
{
if (h != 0)
{
CFragSymbolClass cl;
Ptr ptr;
Str255 name;
PlatformUtilities::copyToStr255 (name, procedureName);
if (FindSymbol ((CFragConnectionID) h, name, &ptr, &cl) == noErr)
{
return ptr;
}
}
return 0;
}
//==============================================================================
InterProcessLock::InterProcessLock (const String& name_) throw()
: internal (0),
name (name_),
reentrancyLevel (0)
{
const File tempDir (File::getSpecialLocation (File::tempDirectory));
const File temp (tempDir.getChildFile (name));
temp.create();
internal = (void*) open (temp.getFullPathName().toUTF8(), O_NONBLOCK | O_RDONLY);
}
InterProcessLock::~InterProcessLock() throw()
{
while (reentrancyLevel > 0)
this->exit();
close ((int) internal);
}
bool InterProcessLock::enter (const int timeOutMillisecs) throw()
{
if (internal == 0)
return false;
if (reentrancyLevel != 0)
return true;
if (timeOutMillisecs <= 0)
{
if (flock ((int) internal,
timeOutMillisecs < 0 ? LOCK_EX
: (LOCK_EX | LOCK_NB)) == 0)
{
++reentrancyLevel;
return true;
}
}
else
{
const int64 endTime = Time::currentTimeMillis() + timeOutMillisecs;
for (;;)
{
if (flock ((int) internal, LOCK_EX | LOCK_NB) == 0)
{
++reentrancyLevel;
return true;
}
if (Time::currentTimeMillis() >= endTime)
break;
Thread::sleep (10);
}
}
return false;
}
void InterProcessLock::exit() throw()
{
if (reentrancyLevel > 0 && internal != 0)
{
--reentrancyLevel;
const int result = flock ((int) internal, LOCK_UN);
(void) result;
jassert (result == 0);
}
}
END_JUCE_NAMESPACE
/*
==============================================================================

This file is part of the JUCE library - "Jules' Utility Class Extensions"
Copyright 2004-7 by Raw Material Software ltd.

------------------------------------------------------------------------------

JUCE can be redistributed and/or modified under the terms of the
GNU General Public License, as published by the Free Software Foundation;
either version 2 of the License, or (at your option) any later version.

JUCE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with JUCE; if not, visit www.gnu.org/licenses or write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA

------------------------------------------------------------------------------

If you'd like to release a closed-source product which uses JUCE, commercial
licenses are also available: visit www.rawmaterialsoftware.com/juce for
more information.

==============================================================================
*/

#include "../../../src/juce_core/basics/juce_StandardHeader.h"
#include <pthread.h>
#include <sched.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <Carbon/Carbon.h>

BEGIN_JUCE_NAMESPACE

#include "../../../src/juce_core/threads/juce_CriticalSection.h"
#include "../../../src/juce_core/threads/juce_WaitableEvent.h"
#include "../../../src/juce_core/threads/juce_Thread.h"
#include "../../../src/juce_core/threads/juce_Process.h"
#include "../../../src/juce_core/threads/juce_InterProcessLock.h"
#include "../../../src/juce_core/misc/juce_PlatformUtilities.h"
#include "../../../src/juce_core/io/files/juce_File.h"


//==============================================================================
CriticalSection::CriticalSection() throw()
{
pthread_mutexattr_t atts;
pthread_mutexattr_init (&atts);
pthread_mutexattr_settype (&atts, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init (&internal, &atts);
}

CriticalSection::~CriticalSection() throw()
{
pthread_mutex_destroy (&internal);
}

void CriticalSection::enter() const throw()
{
pthread_mutex_lock (&internal);
}

bool CriticalSection::tryEnter() const throw()
{
return pthread_mutex_trylock (&internal) == 0;
}

void CriticalSection::exit() const throw()
{
pthread_mutex_unlock (&internal);
}

//==============================================================================
struct EventStruct
{
pthread_cond_t condition;
pthread_mutex_t mutex;
bool triggered;
};

WaitableEvent::WaitableEvent() throw()
{
EventStruct* const es = new EventStruct();
es->triggered = false;

pthread_cond_init (&es->condition, 0);
pthread_mutex_init (&es->mutex, 0);

internal = es;
}

WaitableEvent::~WaitableEvent() throw()
{
EventStruct* const es = (EventStruct*) internal;

pthread_cond_destroy (&es->condition);
pthread_mutex_destroy (&es->mutex);

delete es;
}

bool WaitableEvent::wait (const int timeOutMillisecs) const throw()
{
EventStruct* const es = (EventStruct*) internal;

bool ok = true;
pthread_mutex_lock (&es->mutex);

if (! es->triggered)
{
if (timeOutMillisecs < 0)
{
pthread_cond_wait (&es->condition, &es->mutex);
}
else
{
struct timespec time;
time.tv_sec = timeOutMillisecs / 1000;
time.tv_nsec = (timeOutMillisecs % 1000) * 1000000;
pthread_cond_timedwait_relative_np (&es->condition, &es->mutex, &time);
}

ok = es->triggered;
}

es->triggered = false;

pthread_mutex_unlock (&es->mutex);
return ok;
}

void WaitableEvent::signal() const throw()
{
EventStruct* const es = (EventStruct*) internal;

pthread_mutex_lock (&es->mutex);
es->triggered = true;
pthread_cond_broadcast (&es->condition);
pthread_mutex_unlock (&es->mutex);
}

void WaitableEvent::reset() const throw()
{
EventStruct* const es = (EventStruct*) internal;

pthread_mutex_lock (&es->mutex);
es->triggered = false;
pthread_mutex_unlock (&es->mutex);
}

//==============================================================================
void JUCE_API juce_threadEntryPoint (void*);

void* threadEntryProc (void* userData) throw()
{
juce_threadEntryPoint (userData);
return 0;
}

void* juce_createThread (void* userData) throw()
{
pthread_t handle = 0;

if (pthread_create (&handle, 0, threadEntryProc, userData) == 0)
{
pthread_detach (handle);
return (void*) handle;
}

return 0;
}

void juce_killThread (void* handle) throw()
{
if (handle != 0)
pthread_cancel ((pthread_t) handle);
}

void juce_setCurrentThreadName (const String& /*name*/) throw()
{
}

int Thread::getCurrentThreadId() throw()
{
return (int) pthread_self();
}

void juce_setThreadPriority (void* handle, int priority) throw()
{
if (handle == 0)
handle = (void*) pthread_self();

struct sched_param param;
int policy;
pthread_getschedparam ((pthread_t) handle, &policy, &param);
param.sched_priority = jlimit (1, 127, 1 + (priority * 126) / 11);
pthread_setschedparam ((pthread_t) handle, policy, &param);
}

void Thread::yield() throw()
{
sched_yield();
}

void Thread::setCurrentThreadAffinityMask (const uint32 affinityMask) throw()
{
// xxx
jassertfalse
}

void JUCE_CALLTYPE Thread::sleep (int millisecs) throw()
{
struct timespec time;
time.tv_sec = millisecs / 1000;
time.tv_nsec = (millisecs % 1000) * 1000000;
nanosleep (&time, 0);
}


//==============================================================================
bool JUCE_CALLTYPE juce_isRunningUnderDebugger() throw()
{
static char testResult = 0;

if (testResult == 0)
{
struct kinfo_proc info;
int m[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid() };
size_t sz = sizeof (info);
sysctl (m, 4, &info, &sz, 0, 0);
testResult = (info.kp_proc.p_flag & P_TRACED) == P_TRACED ? 1 : -1;
}

return testResult > 0;
}

bool JUCE_CALLTYPE Process::isRunningUnderDebugger() throw()
{
return juce_isRunningUnderDebugger();
}

void Process::raisePrivilege()
{
jassertfalse
}

void Process::lowerPrivilege()
{
jassertfalse
}

void Process::terminate()
{
ExitToShell();
}

void Process::setPriority (ProcessPriority p)
{
// xxx
}

void* Process::loadDynamicLibrary (const String& name)
{
// xxx needs to use bundles

FSSpec fs;
if (PlatformUtilities::makeFSSpecFromPath (&fs, name))
{
CFragConnectionID connID;
Ptr mainPtr;
Str255 errorMessage;
Str63 nm;
PlatformUtilities::copyToStr63 (nm, name);

const OSErr err = GetDiskFragment (&fs, 0, kCFragGoesToEOF, nm, kReferenceCFrag, &connID, &mainPtr, errorMessage);
if (err == noErr)
return (void*)connID;
}

return 0;
}

void Process::freeDynamicLibrary (void* handle)
{
if (handle != 0)
CloseConnection ((CFragConnectionID*)&handle);
}

void* Process::getProcedureEntryPoint (void* h, const String& procedureName)
{
if (h != 0)
{
CFragSymbolClass cl;
Ptr ptr;
Str255 name;
PlatformUtilities::copyToStr255 (name, procedureName);

if (FindSymbol ((CFragConnectionID) h, name, &ptr, &cl) == noErr)
{
return ptr;
}
}

return 0;
}

//==============================================================================
InterProcessLock::InterProcessLock (const String& name_) throw()
: internal (0),
name (name_),
reentrancyLevel (0)
{
const File tempDir (File::getSpecialLocation (File::tempDirectory));
const File temp (tempDir.getChildFile (name));
temp.create();

internal = (void*) open (temp.getFullPathName().toUTF8(), O_NONBLOCK | O_RDONLY);
}

InterProcessLock::~InterProcessLock() throw()
{
while (reentrancyLevel > 0)
this->exit();

close ((int) internal);
}

bool InterProcessLock::enter (const int timeOutMillisecs) throw()
{
if (internal == 0)
return false;

if (reentrancyLevel != 0)
return true;

if (timeOutMillisecs <= 0)
{
if (flock ((int) internal,
timeOutMillisecs < 0 ? LOCK_EX
: (LOCK_EX | LOCK_NB)) == 0)
{
++reentrancyLevel;
return true;
}
}
else
{
const int64 endTime = Time::currentTimeMillis() + timeOutMillisecs;

for (;;)
{
if (flock ((int) internal, LOCK_EX | LOCK_NB) == 0)
{
++reentrancyLevel;
return true;
}

if (Time::currentTimeMillis() >= endTime)
break;

Thread::sleep (10);
}
}

return false;
}

void InterProcessLock::exit() throw()
{
if (reentrancyLevel > 0 && internal != 0)
{
--reentrancyLevel;

const int result = flock ((int) internal, LOCK_UN);
(void) result;
jassert (result == 0);
}
}

END_JUCE_NAMESPACE

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