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namespace LinuxSampler { |
namespace LinuxSampler { |
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#if defined(WIN32) |
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// Callback functions for the WIN32 thread API |
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DWORD WINAPI __win32thread_launcher(LPVOID lpParameter); |
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#else |
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// Callback functions for the POSIX thread API |
// Callback functions for the POSIX thread API |
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static void* __pthread_launcher(void* thread); |
static void* __pthread_launcher(void* thread); |
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static void __pthread_destructor(void* thread); |
static void __pthread_destructor(void* thread); |
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#endif |
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Thread::Thread(bool LockMemory, bool RealTime, int PriorityMax, int PriorityDelta) { |
Thread::Thread(bool LockMemory, bool RealTime, int PriorityMax, int PriorityDelta) { |
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this->bLockedMemory = LockMemory; |
this->bLockedMemory = LockMemory; |
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this->isRealTime = RealTime; |
this->isRealTime = RealTime; |
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this->PriorityDelta = PriorityDelta; |
this->PriorityDelta = PriorityDelta; |
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this->PriorityMax = PriorityMax; |
this->PriorityMax = PriorityMax; |
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#if defined(WIN32) |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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win32isRunning = false; |
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#endif |
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#else |
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__thread_destructor_key = 0; |
__thread_destructor_key = 0; |
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pthread_attr_init(&__thread_attr); |
pthread_attr_init(&__thread_attr); |
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#endif |
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} |
} |
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Thread::~Thread() { |
Thread::~Thread() { |
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StopThread(); |
StopThread(); |
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#if defined(WIN32) |
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#else |
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pthread_attr_destroy(&__thread_attr); |
pthread_attr_destroy(&__thread_attr); |
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#endif |
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} |
} |
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/** |
/** |
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* Main() method in your subclass. |
* Main() method in your subclass. |
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*/ |
*/ |
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int Thread::StartThread() { |
int Thread::StartThread() { |
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#if defined (WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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// poll the win32isRunning variable and sleep 1msec inbetween |
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if(!win32isRunning) { |
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SignalStartThread(); |
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while(1) { |
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Sleep(1); |
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if(win32isRunning) break; |
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} |
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} |
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return 0; |
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#else |
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RunningCondition.Lock(); |
RunningCondition.Lock(); |
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if (!RunningCondition.GetUnsafe()) { |
if (!RunningCondition.GetUnsafe()) { |
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SignalStartThread(); |
SignalStartThread(); |
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} |
} |
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RunningCondition.Unlock(); |
RunningCondition.Unlock(); |
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return 0; |
return 0; |
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#endif |
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} |
} |
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|
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/** |
/** |
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* @see StartThread() |
* @see StartThread() |
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*/ |
*/ |
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int Thread::SignalStartThread() { |
int Thread::SignalStartThread() { |
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#if defined(WIN32) |
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LPVOID lpParameter; |
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hThread = CreateThread( |
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NULL, // no security attributes |
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MIN_STACK_SIZE, |
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__win32thread_launcher, |
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this, |
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0, |
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&lpThreadId); |
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if(hThread == NULL) { |
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std::cerr << "Thread creation failed: Error" << GetLastError() << std::endl << std::flush; |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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win32isRunning = false; |
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#else |
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RunningCondition.Set(false); |
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#endif |
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return -1; |
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} |
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return 0; |
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#else |
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// prepare the thread properties |
// prepare the thread properties |
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int res = pthread_attr_setinheritsched(&__thread_attr, PTHREAD_EXPLICIT_SCHED); |
int res = pthread_attr_setinheritsched(&__thread_attr, PTHREAD_EXPLICIT_SCHED); |
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if (res) { |
if (res) { |
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break; |
break; |
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} |
} |
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return res; |
return res; |
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#endif |
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} |
} |
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/** |
/** |
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* it's execution before it will return. |
* it's execution before it will return. |
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*/ |
*/ |
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int Thread::StopThread() { |
int Thread::StopThread() { |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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SignalStopThread(); |
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win32isRunning = false; |
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return 0; |
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#endif |
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RunningCondition.Lock(); |
RunningCondition.Lock(); |
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if (RunningCondition.GetUnsafe()) { |
if (RunningCondition.GetUnsafe()) { |
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SignalStopThread(); |
SignalStopThread(); |
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// wait until thread stopped execution |
// wait until thread stopped execution |
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RunningCondition.WaitIf(true); |
RunningCondition.WaitIf(true); |
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#if defined(WIN32) |
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#else |
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pthread_detach(__thread_id); |
pthread_detach(__thread_id); |
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#endif |
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} |
} |
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RunningCondition.Unlock(); |
RunningCondition.Unlock(); |
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return 0; |
return 0; |
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*/ |
*/ |
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int Thread::SignalStopThread() { |
int Thread::SignalStopThread() { |
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//FIXME: segfaults when thread is not yet running |
//FIXME: segfaults when thread is not yet running |
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#if defined(WIN32) |
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BOOL res; |
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res = TerminateThread(hThread, 0); // we set ExitCode to 0 |
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//res = WaitForSingleObject( hThread, INFINITE); |
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//myprint(("Thread::SignalStopThread: WaitForSingleObject( hThread, INFINITE) res=%d\n",res)); |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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win32isRunning = false; |
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#else |
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RunningCondition.Set(false); |
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#endif |
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#else |
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pthread_cancel(__thread_id); |
pthread_cancel(__thread_id); |
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#endif |
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return 0; |
return 0; |
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} |
} |
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* Returns @c true in case the thread is currently running. |
* Returns @c true in case the thread is currently running. |
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*/ |
*/ |
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bool Thread::IsRunning() { |
bool Thread::IsRunning() { |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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return win32isRunning; |
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#else |
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return RunningCondition.GetUnsafe(); |
return RunningCondition.GetUnsafe(); |
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#endif |
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} |
} |
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/** |
/** |
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* current priority). |
* current priority). |
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*/ |
*/ |
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int Thread::SetSchedulingPriority() { |
int Thread::SetSchedulingPriority() { |
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#if defined(WIN32) |
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DWORD dwPriorityClass; |
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int nPriority; |
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if(isRealTime) { |
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dwPriorityClass = REALTIME_PRIORITY_CLASS; |
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if (this->PriorityMax == 1) { |
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if(this->PriorityDelta == 0) nPriority = THREAD_PRIORITY_TIME_CRITICAL; |
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else nPriority = 7 + this->PriorityDelta; |
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} |
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else nPriority = THREAD_PRIORITY_NORMAL + this->PriorityDelta; |
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} |
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else { |
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dwPriorityClass = NORMAL_PRIORITY_CLASS; |
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nPriority = THREAD_PRIORITY_NORMAL + this->PriorityDelta; |
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} |
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BOOL res; |
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// FIXME: priority class (realtime) does not work yet, gives error. check why. |
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#if 0 |
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res = SetPriorityClass( hThread, dwPriorityClass ); |
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if(res == false) { |
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std::cerr << "Thread: WARNING, setPriorityClass " << dwPriorityClass << "failed. Error " << GetLastError() << "\n"; |
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return -1; |
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} |
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res = SetThreadPriority( hThread, nPriority ); |
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if(res == false) { |
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std::cerr << "Thread: WARNING, setThreadPriority " << nPriority << "failed. Error " << GetLastError() << "\n"; |
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return -1; |
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} |
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#endif |
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return 0; |
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#else |
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#if !defined(__APPLE__) |
#if !defined(__APPLE__) |
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int policy; |
int policy; |
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const char* policyDescription = NULL; |
const char* policyDescription = NULL; |
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} |
} |
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#endif |
#endif |
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return 0; |
return 0; |
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#endif |
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} |
} |
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/** |
/** |
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* Locks the memory so it will not be swapped out by the operating system. |
* Locks the memory so it will not be swapped out by the operating system. |
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*/ |
*/ |
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int Thread::LockMemory() { |
int Thread::LockMemory() { |
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#if defined(WIN32) |
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return 0; |
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#else |
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#if !defined(__APPLE__) |
#if !defined(__APPLE__) |
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if (!bLockedMemory) return 0; |
if (!bLockedMemory) return 0; |
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if (mlockall(MCL_CURRENT | MCL_FUTURE) < 0) { |
if (mlockall(MCL_CURRENT | MCL_FUTURE) < 0) { |
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} |
} |
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#endif |
#endif |
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return 0; |
return 0; |
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#endif |
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} |
} |
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/** |
/** |
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* CALL THIS METHOD YOURSELF! |
* CALL THIS METHOD YOURSELF! |
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*/ |
*/ |
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void Thread::EnableDestructor() { |
void Thread::EnableDestructor() { |
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#if defined(WIN32_SIGNALSTARTTHREAD_WORKAROUND) |
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win32isRunning = true; |
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return; |
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#endif |
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RunningCondition.Lock(); |
RunningCondition.Lock(); |
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#if defined(WIN32) |
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#else |
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pthread_key_create(&__thread_destructor_key, __pthread_destructor); |
pthread_key_create(&__thread_destructor_key, __pthread_destructor); |
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pthread_setspecific(__thread_destructor_key, this); |
pthread_setspecific(__thread_destructor_key, this); |
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#endif |
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RunningCondition.Set(true); |
RunningCondition.Set(true); |
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RunningCondition.Unlock(); |
RunningCondition.Unlock(); |
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} |
} |
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* Will be called by the kernel when the thread stops it's execution. |
* Will be called by the kernel when the thread stops it's execution. |
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*/ |
*/ |
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int Thread::Destructor() { |
int Thread::Destructor() { |
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#if defined(WIN32) |
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#else |
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pthread_key_delete(__thread_destructor_key); |
pthread_key_delete(__thread_destructor_key); |
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RunningCondition.Set(false); |
RunningCondition.Set(false); |
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#endif |
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return 0; |
return 0; |
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} |
} |
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#if defined(WIN32) |
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DWORD WINAPI __win32thread_launcher(LPVOID lpParameter) { |
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Thread* t; |
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t = (Thread*) lpParameter; |
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t->SetSchedulingPriority(); |
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t->LockMemory(); |
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t->EnableDestructor(); |
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t->Main(); |
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return 0; |
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} |
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#else |
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/// Callback function for the POSIX thread API |
/// Callback function for the POSIX thread API |
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static void* __pthread_launcher(void* thread) { |
static void* __pthread_launcher(void* thread) { |
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pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL); // let the thread be killable under any circumstances |
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL); // let the thread be killable under any circumstances |
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t->Main(); |
t->Main(); |
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return NULL; |
return NULL; |
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} |
} |
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#endif |
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#if defined(WIN32) |
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#else |
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/// Callback function for the POSIX thread API |
/// Callback function for the POSIX thread API |
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static void __pthread_destructor(void* thread) { |
static void __pthread_destructor(void* thread) { |
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Thread* t; |
Thread* t; |
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t = (Thread*) thread; |
t = (Thread*) thread; |
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t->Destructor(); |
t->Destructor(); |
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} |
} |
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#endif |
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} // namespace LinuxSampler |
} // namespace LinuxSampler |