#include "Threads/WCThreadSafe.h" #if XPLATFORMTHREADS_WINDOWS #define _WIN32_WINNT 0x0500 // need at least Windows2000 (for TryEnterCriticalSection() and SignalObjectAndWait() #include "IncludeWindows.h" #include #endif // XPLATFORMTHREADS_WINDOWS #if defined(__MACOS__) #include #include #endif // __MACOS__ #if XPLATFORMTHREADS_POSIX #include // avoid the framework version and use the /usr/include version #include #include #include #include #include // We do this externs because comes from MSL extern "C" FILE *popen(const char *command, const char *type); extern "C" int pclose(FILE *stream); static int (*BSDfread)( void *, size_t, size_t, FILE * ) = 0; #include #endif //XPLATFORMTHREADS_POSIX #include "Akupara/threading/atomic_ops.hpp" namespace wvNS { static const unsigned int knMicrosecondsPerSecond = 1000*1000; static const unsigned int knNanosecondsPerMicrosecond = 1000; static const unsigned int knNanosecondsPerSecond = knMicrosecondsPerSecond*knNanosecondsPerMicrosecond; namespace wvThread { //-------------------------------------------------------------------------------- static inline bool EnsureThreadingInitialized() { bool bRetval = true; return bRetval; } //-------------------------------------------------------------------------------- //-------------------------------------------------------------------------------- static uint32_t CalculateTicksPerMicrosecond(); static uint32_t CalculateTicksPerMicrosecond() { uint32_t nTicksPerMicrosecond=0; #if defined(_WIN32) LARGE_INTEGER TSC; ::QueryPerformanceFrequency(&TSC); nTicksPerMicrosecond = uint32_t (TSC.QuadPart / knMicrosecondsPerSecond); #elif defined(__linux__) && defined(__i386__) static const timediff sktd_TSC_MeasurementPeriod = 40*1000; // delay for CalculateTicksPerMicrosecond() to measure the TSC frequency uint64_t Tstart, Tend; timeval tvtmp, tvstart, tvend; //--------------------- begin measurement code // poll to align to a tick of gettimeofday ::gettimeofday(&tvtmp,0); do { ::gettimeofday(&tvstart,0); __asm__ __volatile__ (".byte 0x0f, 0x31" : "=A" (Tstart)); // RDTSC } while (tvtmp.tv_usec!=tvstart.tv_usec); // delay some ::usleep(sktd_TSC_MeasurementPeriod); // ::gettimeofday(&tvtmp,0); do { ::gettimeofday(&tvend,0); __asm__ __volatile__ (".byte 0x0f, 0x31" : "=A" (Tend)); // RDTSC } while (tvtmp.tv_usec!=tvend.tv_usec); //--------------------- end measurement code suseconds_t elapsed_usec = (tvend.tv_sec-tvstart.tv_sec)*knMicrosecondsPerSecond + (tvend.tv_usec-tvstart.tv_usec); uint64_t elapsed_ticks = Tend-Tstart; nTicksPerMicrosecond = uint32_t (elapsed_ticks/elapsed_usec); #endif return nTicksPerMicrosecond; } #if defined(__MACOS__) //&& !defined(__MACH__) bool FindNetInterfaceByIPAddress(const char *sIP, char *sInterface) // sIP and sInterface are both char[16] { FILE *fProcess , *pSubcall; char sLine[256]="", *pToken, sCommand[150]; bool res = false; int iret; fProcess = popen("ifconfig -l inet", "r"); if (fProcess) { memset(sInterface, '\0', 16); iret = BSDfread(sLine, sizeof(char), sizeof(sLine), fProcess); pToken = strtok(sLine, " "); while (pToken) { sprintf(sCommand, "ifconfig %s | grep \"inet %s \"", pToken, sIP); pSubcall = popen(sCommand, "r"); if (pSubcall) { char sSubline[100]=""; if (BSDfread(sSubline, sizeof(char), sizeof(sSubline), pSubcall)) { // found strcpy(sInterface, pToken); res = true; pclose(pSubcall); break; } } pclose(pSubcall); pToken = strtok(NULL, " "); } } pclose(fProcess); return res; } #endif // MACOS timestamp now(void) { EnsureThreadingInitialized(); static const uint32_t nTicksPerMicrosecond = CalculateTicksPerMicrosecond(); #if defined(_WIN32) if (nTicksPerMicrosecond) { LARGE_INTEGER TSC; ::QueryPerformanceCounter(&TSC); return timestamp(uint32_t(TSC.QuadPart/nTicksPerMicrosecond)); } else return timestamp(0); #elif defined(__MACOS__) if (nTicksPerMicrosecond) {} // prevent 'unused' warnings UnsignedWide usecs; ::Microseconds(&usecs); return timestamp(usecs.lo); #elif defined(__linux__) && defined(__i386__) && defined(__gnu_linux__) uint64_t TSC; __asm__ __volatile__ (".byte 0x0f, 0x31" : "=A" (TSC)); // RDTSC return timestamp(TSC/nTicksPerMicrosecond); #elif defined(__linux__) && defined(__PPC__) && defined(__gnu_linux__) #warning need to implement maybe #else #error Dont know how to get microseconds timer ! #endif // defined(_WIN32) } void sleep_milliseconds(unsigned int nMillisecs) { EnsureThreadingInitialized(); #if XPLATFORMTHREADS_WINDOWS ::Sleep(nMillisecs); #elif XPLATFORMTHREADS_POSIX ::usleep(nMillisecs*1000); #else #error Not implemented for your OS #endif } #if XPLATFORMTHREADS_WINDOWS inline DWORD win32_milliseconds(timediff td) { return (td+499)/1000; } #endif void sleep(timediff _td) { if (_td>0) { EnsureThreadingInitialized(); #if XPLATFORMTHREADS_WINDOWS ::Sleep(win32_milliseconds(_td)); // This is the best we can do in windows #elif XPLATFORMTHREADS_POSIX ::usleep(_td); #else #error Not implemented for your OS #endif } } #if XPLATFORMTHREADS_WINDOWS void yield() { ::Sleep(0); } #elif XPLATFORMTHREADS_POSIX void yield() { ::sched_yield(); } #endif class ThreadMutexInited::OSDependentMutex : public noncopyableobject { #if defined (XPLATFORMTHREADS_WINDOWS) protected: CRITICAL_SECTION m_critsec; public: inline OSDependentMutex() { EnsureThreadingInitialized(); ::InitializeCriticalSection(&m_critsec); } inline ~OSDependentMutex() { EnsureThreadingInitialized(); ::DeleteCriticalSection (&m_critsec); } inline void obtain() { EnsureThreadingInitialized(); ::EnterCriticalSection (&m_critsec); } inline void release() { EnsureThreadingInitialized(); ::LeaveCriticalSection (&m_critsec); } inline bool tryobtain() { EnsureThreadingInitialized(); return TryEnterCriticalSection(&m_critsec)!=FALSE; } #elif defined (XPLATFORMTHREADS_POSIX) protected: pthread_mutex_t m_ptmutex; public: inline OSDependentMutex() { EnsureThreadingInitialized(); pthread_mutexattr_t attr; pthread_mutexattr_init(&attr); pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); ::pthread_mutex_init (&m_ptmutex, &attr); } inline ~OSDependentMutex() { EnsureThreadingInitialized(); ::pthread_mutex_destroy(&m_ptmutex); } inline void obtain() { EnsureThreadingInitialized(); ::pthread_mutex_lock (&m_ptmutex); } inline void release() { EnsureThreadingInitialized(); ::pthread_mutex_unlock (&m_ptmutex); } inline bool tryobtain() { EnsureThreadingInitialized(); return ::pthread_mutex_trylock(&m_ptmutex)!=EBUSY; } #endif }; ThreadMutexInited::ThreadMutexInited() : m_osdmutex(0) {} void ThreadMutexInited::init() { if (! is_init()) { m_osdmutex = new OSDependentMutex; } } void ThreadMutexInited::uninit() { if (is_init()) { delete m_osdmutex; m_osdmutex = 0; } } ThreadMutexInited::~ThreadMutexInited() { uninit(); } void ThreadMutexInited::obtain() { if (is_init()) { m_osdmutex->obtain(); } } void ThreadMutexInited::release() { if (is_init()) { m_osdmutex->release(); } } bool ThreadMutexInited::tryobtain() { bool retVal = true; if (is_init()) { retVal = m_osdmutex->tryobtain(); } return retVal; } class ThreadConditionSignal::OSDependentObject : public noncopyableobject { #if defined (XPLATFORMTHREADS_POSIX) protected: pthread_cond_t m_ptcond; pthread_mutex_t m_ptmutex; public: inline OSDependentObject() { EnsureThreadingInitialized(); ::pthread_mutex_init(&m_ptmutex,0); ::pthread_cond_init(&m_ptcond, 0); } inline ~OSDependentObject() { ::pthread_cond_destroy(&m_ptcond), ::pthread_mutex_destroy(&m_ptmutex); } inline void signal_unicast() { ::pthread_cond_signal(&m_ptcond); } inline void signal_broadcast() { ::pthread_cond_broadcast(&m_ptcond); } inline void await_signal() { ::pthread_cond_wait(&m_ptcond, &m_ptmutex); } inline bool await_signal(timediff td) { timespec tspecDeadline; timeval tvNow; ::gettimeofday(&tvNow,0); tspecDeadline.tv_nsec = (tvNow.tv_usec + td%knMicrosecondsPerSecond)*knNanosecondsPerMicrosecond; tspecDeadline.tv_sec = tvNow.tv_sec + td/knMicrosecondsPerSecond; if (!(tspecDeadline.tv_nsec < suseconds_t(knNanosecondsPerSecond))) ++tspecDeadline.tv_sec, tspecDeadline.tv_nsec-=knNanosecondsPerSecond; return ::pthread_cond_timedwait(&m_ptcond, &m_ptmutex, &tspecDeadline) != ETIMEDOUT; } void obtain_mutex() { ::pthread_mutex_lock(&m_ptmutex); } bool tryobtain_mutex() { return ::pthread_mutex_trylock(&m_ptmutex)!=EBUSY; } void release_mutex() { ::pthread_mutex_unlock(&m_ptmutex); } #elif XPLATFORMTHREADS_WINDOWS protected: unsigned int m_nWaiterCount; CRITICAL_SECTION m_csectWaiterCount; HANDLE m_hndSemaphoreSignaller; // We keep this semaphore always at 0 count (non-signalled). We use it to release a controlled number of threads. HANDLE m_hndEventAllWaitersReleased; // auto-reset HANDLE m_hndMutex; // the mutex associated with the condition bool m_bBroadcastSignalled; // means that the last waiter must signal m_hndEventAllWaitersReleased when done waiting protected: // - - - - - - - - - - - - - - - - - - - - - - - - bool await_signal_win32(DWORD dwTimeout) { ::EnterCriticalSection(&m_csectWaiterCount); ++m_nWaiterCount; ::LeaveCriticalSection(&m_csectWaiterCount); // This is the actual wait for the signal bool bWaitSucceeded = ::SignalObjectAndWait(m_hndMutex, m_hndSemaphoreSignaller, dwTimeout, FALSE) == WAIT_OBJECT_0; // ::EnterCriticalSection(&m_csectWaiterCount); bool bLastWaiter = --m_nWaiterCount==0 && m_bBroadcastSignalled; ::LeaveCriticalSection(&m_csectWaiterCount); // re-acquire the mutex if (bLastWaiter) ::SignalObjectAndWait(m_hndEventAllWaitersReleased, m_hndMutex, INFINITE, FALSE); else ::WaitForSingleObject(m_hndMutex, INFINITE); return bWaitSucceeded; } public: inline bool await_signal(timediff td) { return await_signal_win32((win32_milliseconds(td))); } inline void await_signal() { await_signal_win32(INFINITE); } OSDependentObject() : m_nWaiterCount(0), m_bBroadcastSignalled(false) { EnsureThreadingInitialized(); ::InitializeCriticalSection(&m_csectWaiterCount); m_hndEventAllWaitersReleased = ::CreateEvent( 0, // security FALSE, // auto-reset FALSE, // initial state non-sognalled 0); // name m_hndSemaphoreSignaller = ::CreateSemaphore( 0, // security 0, // initial count (and will stay this way) 0x100000, // maximum count (should be as large as the maximum number of waiting threads) 0); // name m_hndMutex = ::CreateMutex( 0, // security FALSE, // not owned initially 0); // name //if (m_hndEventAllWaitersReleased==INVALID_HANDLE_VALUE || m_hndSemaphoreSignaller==INVALID_HANDLE_VALUE) // throw something(); } ~OSDependentObject() { ::CloseHandle(m_hndMutex); ::CloseHandle(m_hndSemaphoreSignaller); ::CloseHandle(m_hndEventAllWaitersReleased); ::DeleteCriticalSection(&m_csectWaiterCount); } inline void signal_unicast() { ::EnterCriticalSection(&m_csectWaiterCount); unsigned int nWaiters = m_nWaiterCount; ::LeaveCriticalSection(&m_csectWaiterCount); if (nWaiters) ::ReleaseSemaphore(m_hndSemaphoreSignaller, 1, 0); // release 1 semaphore credit to release one waiting thread } void signal_broadcast() { ::EnterCriticalSection(&m_csectWaiterCount); unsigned int nWaiters = m_nWaiterCount; if (nWaiters) { m_bBroadcastSignalled = true; ::ReleaseSemaphore(m_hndSemaphoreSignaller, nWaiters, 0); // release as many credits as there are waiting threads ::LeaveCriticalSection(&m_csectWaiterCount); ::WaitForSingleObject(m_hndEventAllWaitersReleased, INFINITE); // at this point all threads are waiting on m_hndMutex, which would be released outside this function call m_bBroadcastSignalled = false; } else // no one is waiting ::LeaveCriticalSection(&m_csectWaiterCount); } //------------------------------------------------ inline void obtain_mutex() { ::WaitForSingleObject(m_hndMutex, INFINITE); } inline bool tryobtain_mutex() { return ::WaitForSingleObject(m_hndMutex,0) == WAIT_OBJECT_0; } inline void release_mutex() { ::ReleaseMutex(m_hndMutex); } //------------------------------------------------ #endif // OS switch }; void ThreadConditionSignal::obtain_mutex() { m_osdepobj.obtain_mutex(); } bool ThreadConditionSignal::tryobtain_mutex() { return m_osdepobj.tryobtain_mutex(); } void ThreadConditionSignal::release_mutex() { m_osdepobj.release_mutex(); } void ThreadConditionSignal::await_condition() { m_osdepobj.await_signal(); } bool ThreadConditionSignal::await_condition(timediff tdTimeout) { return m_osdepobj.await_signal(tdTimeout); } void ThreadConditionSignal::signal_condition_single() { m_osdepobj.signal_unicast(); } void ThreadConditionSignal::signal_condition_broadcast() { m_osdepobj.signal_broadcast(); } ThreadConditionSignal::ThreadConditionSignal() : m_osdepobj(*new OSDependentObject) {} ThreadConditionSignal::~ThreadConditionSignal() { delete &m_osdepobj; } #if XPLATFORMTHREADS_POSIX namespace // anon { inline int max_FIFO_schedparam() { static const int max_priority = ::sched_get_priority_max(SCHED_FIFO); return max_priority; } inline int schedparam_by_percentage(unsigned short percentage) { return (max_FIFO_schedparam()*10*percentage+500)/1000; } class POSIXThreadPriority { public: int m_SchedPolicy; int m_SchedPriority; POSIXThreadPriority(ThreadPriority pri) { switch (pri) { case ThreadPriority::TimeCritical: m_SchedPolicy=SCHED_FIFO, m_SchedPriority=schedparam_by_percentage(80); break; case ThreadPriority::AboveNormal: m_SchedPolicy=SCHED_FIFO, m_SchedPriority=schedparam_by_percentage(20); break; case ThreadPriority::BelowNormal: // fall through to normal; nothing is below normal in POSIX case ThreadPriority::Normal: // fall through to default default: m_SchedPolicy=SCHED_OTHER, m_SchedPriority=0; break; } } }; } // namespace anonymous #endif // XPLATFORMTHREADS_POSIX #if XPLATFORMTHREADS_WINDOWS namespace // anon { inline int WinThreadPriority(ThreadPriority pri) { switch (pri) { case ThreadPriority::BelowNormal: return THREAD_PRIORITY_BELOW_NORMAL; case ThreadPriority::AboveNormal: return THREAD_PRIORITY_ABOVE_NORMAL; case ThreadPriority::TimeCritical: return THREAD_PRIORITY_TIME_CRITICAL; case ThreadPriority::Normal: // fall through to default default: return THREAD_PRIORITY_NORMAL; } } } // namespace anon #endif // XPLATFORMTHREADS_WINDOWS void SetMyThreadPriority(ThreadPriority pri) { #if XPLATFORMTHREADS_WINDOWS ::SetThreadPriority(::GetCurrentThread(), WinThreadPriority(pri)); #endif // XPLATFORMTHREADS_WINDOWS #if XPLATFORMTHREADS_POSIX const POSIXThreadPriority posixpri(pri); sched_param sparam; ::memset(&sparam, 0, sizeof(sparam)); sparam.sched_priority = posixpri.m_SchedPriority; #if defined(__linux__) ::sched_setscheduler(0, posixpri.m_SchedPolicy, &sparam); // linux uses this function instead of pthread_ #else pthread_setschedparam(pthread_self(), posixpri.m_SchedPolicy, &sparam); #endif #endif // XPLATFORMTHREADS_POSIX } struct ThreadWrapperData { ThreadFunction *func; ThreadFunctionArgument arg; }; #if XPLATFORMTHREADS_WINDOWS static unsigned int __stdcall ThreadWrapper(void * arg) { register ThreadWrapperData *twd = reinterpret_cast(arg); ThreadFunction *func=twd->func; ThreadFunctionArgument farg=twd->arg; delete twd; return DWORD(func(farg)); } #elif XPLATFORMTHREADS_POSIX static void * ThreadWrapper(void *arg) { register ThreadWrapperData *twd = reinterpret_cast(arg); ThreadFunction *func=twd->func; ThreadFunctionArgument farg=twd->arg; delete twd; return reinterpret_cast(func(farg)); } typedef void*(ThreadWrapperFunction)(void*); static ThreadWrapperFunction *ThunkedThreadWrapper = ThreadWrapper; #endif // OS switch class ThreadHandle::OSDependent { public: static void StartThread(ThreadWrapperData *, ThreadHandle &, ThreadPriority); static bool KillThread(ThreadHandle); static bool JoinThread(ThreadHandle, ThreadFunctionReturnType*); static void Close(ThreadHandle); #if XPLATFORMTHREADS_WINDOWS static inline uintptr_t from_oshandle(HANDLE h) { return reinterpret_cast(h); } static inline HANDLE to_oshandle(uintptr_t h) { return reinterpret_cast(h); } #elif XPLATFORMTHREADS_POSIX static inline uintptr_t from_oshandle(pthread_t pt) { return uintptr_t(pt); } static inline pthread_t to_oshandle(uintptr_t h) { return pthread_t(h); } #endif // OS switch }; #if XPLATFORMTHREADS_WINDOWS const ThreadHandle ThreadHandle::Invalid(OSDependent::from_oshandle(INVALID_HANDLE_VALUE)); #elif XPLATFORMTHREADS_POSIX const ThreadHandle ThreadHandle::Invalid(OSDependent::from_oshandle(0)); #endif // OS switch inline void ThreadHandle::OSDependent::StartThread(ThreadWrapperData *ptwdata, ThreadHandle &th, ThreadPriority pri) { #if XPLATFORMTHREADS_WINDOWS uintptr_t h = ::_beginthreadex( 0, // no security attributes, not inheritable 0, // default stack size ThreadWrapper, // function to call (void*)(ptwdata), // argument for function 0, // creation flags 0 // where to store thread ID ); if (h) { th.m_oshandle = h; if (pri!=ThreadPriority::Normal) ::SetThreadPriority(to_oshandle(h), WinThreadPriority(pri)); } else th=Invalid; #elif XPLATFORMTHREADS_POSIX pthread_attr_t my_thread_attr, *pmy_thread_attr = 0; sched_param my_schedparam; if (pri!=ThreadPriority::Normal) { pmy_thread_attr = &my_thread_attr; const POSIXThreadPriority posixpriority(pri); int result; result = pthread_attr_init (pmy_thread_attr); result = pthread_attr_setschedpolicy(pmy_thread_attr, posixpriority.m_SchedPolicy); memset(&my_schedparam, 0, sizeof(my_schedparam)); my_schedparam.sched_priority = posixpriority.m_SchedPriority; result = pthread_attr_setschedparam(pmy_thread_attr, &my_schedparam); } pthread_t pt; int anyerr = pthread_create( &pt, // variable for thread handle pmy_thread_attr, // default attributes ThunkedThreadWrapper, ptwdata ); if (anyerr) th=Invalid; else th.m_oshandle = OSDependent::from_oshandle(pt); #endif } inline bool ThreadHandle::OSDependent::KillThread(ThreadHandle h) { #if XPLATFORMTHREADS_WINDOWS return ::TerminateThread(to_oshandle(h.m_oshandle), (DWORD)-1) != 0; #elif XPLATFORMTHREADS_POSIX return pthread_cancel(to_oshandle(h.m_oshandle)) == 0; #endif } bool ThreadHandle::OSDependent::JoinThread(ThreadHandle h, ThreadFunctionReturnType *pretval) { #if XPLATFORMTHREADS_WINDOWS const bool kbReturnedOk = (WAIT_OBJECT_0 == ::WaitForSingleObject(OSDependent::to_oshandle(h.m_oshandle), INFINITE)); if (kbReturnedOk && pretval) { DWORD dwExitCode; ::GetExitCodeThread(to_oshandle(h.m_oshandle), &dwExitCode); *pretval = (ThreadFunctionReturnType)(dwExitCode); } return kbReturnedOk; #endif #if XPLATFORMTHREADS_POSIX ThreadFunctionReturnType ptrExitCode = 0; int join_return_code = pthread_join(to_oshandle(h.m_oshandle), (void**)ptrExitCode); const bool kbReturnedOk = (0 == join_return_code); if (0 != pretval) { *pretval = ptrExitCode; } return kbReturnedOk; #endif } #if XPLATFORMTHREADS_WINDOWS inline void ThreadHandle::OSDependent::Close(ThreadHandle h) { ::CloseHandle(OSDependent::to_oshandle(h.m_oshandle)); } #endif // XPLATFORMTHREADS_WINDOWS #if XPLATFORMTHREADS_POSIX inline void ThreadHandle::OSDependent::Close(ThreadHandle) {} #endif // XPLATFORMTHREADS_POSIX //********************************************************************************************** class WCThreadRef::OSDependent { public: static void GetCurrentThreadRef(WCThreadRef& tid); #if XPLATFORMTHREADS_WINDOWS static inline uintptr_t from_os(DWORD thread_id) { return (uintptr_t)(thread_id); } static inline DWORD to_os(uintptr_t thread_id) { return (DWORD)(thread_id); } #elif XPLATFORMTHREADS_POSIX static inline uintptr_t from_os(pthread_t thread_id) { return (uintptr_t)(thread_id); } static inline pthread_t to_os(uintptr_t thread_id) { return pthread_t(thread_id); } #endif // OS switch }; //********************************************************************************************** inline void WCThreadRef::OSDependent::GetCurrentThreadRef(WCThreadRef& tid) { #if XPLATFORMTHREADS_WINDOWS DWORD thread_id = ::GetCurrentThreadId(); tid.m_osThreadRef = OSDependent::from_os(thread_id); #elif XPLATFORMTHREADS_POSIX pthread_t thread_id = ::pthread_self(); tid.m_osThreadRef = OSDependent::from_os(thread_id); #endif // OS switch } //********************************************************************************************** ThreadHandle StartThread(ThreadFunction func, ThreadFunctionArgument arg, ThreadPriority thpri) { EnsureThreadingInitialized(); ThreadWrapperData *ptwdata = new ThreadWrapperData; ptwdata->func = func; ptwdata->arg = arg; ThreadHandle thToReturn; ThreadHandle::OSDependent::StartThread(ptwdata, thToReturn, thpri); return thToReturn; } bool KillThread(ThreadHandle h) { EnsureThreadingInitialized(); return ThreadHandle::OSDependent::KillThread(h); } bool JoinThread(ThreadHandle h, ThreadFunctionReturnType *pretval) { EnsureThreadingInitialized(); return ThreadHandle::OSDependent::JoinThread(h, pretval); } void Close(ThreadHandle h) { EnsureThreadingInitialized(); return ThreadHandle::OSDependent::Close(h); } //******************************************************************************************* WCThreadRef GetCurrentThreadRef() { EnsureThreadingInitialized(); // Is it necessary? WCThreadRef tRefToReturn; WCThreadRef::OSDependent::GetCurrentThreadRef(tRefToReturn); return tRefToReturn; } //******************************************************************************************* bool IsThreadExists(const WCThreadRef& threadRef) { #if XPLATFORMTHREADS_WINDOWS DWORD dwThreadId = WCThreadRef::OSDependent::to_os((uintptr_t)threadRef); HANDLE handle = ::OpenThread(SYNCHRONIZE, // dwDesiredAccess - use of the thread handle in any of the wait functions FALSE, // bInheritHandle - processes do not inherit this handle dwThreadId); // Now we have the handle, check if the associated thread exists: DWORD retVal = WaitForSingleObject(handle, 0); if (retVal == WAIT_FAILED) return false; // the thread does not exists else return true; // the thread exists #elif XPLATFORMTHREADS_POSIX pthread_t pthreadRef = WCThreadRef::OSDependent::to_os((uintptr_t)threadRef); int retVal = pthread_kill(pthreadRef, 0); // send a signal to the thread, but do nothing if (retVal == ESRCH) return false; // the thread does not exists else return true; // the thread exists #endif // OS switch } //******************************************************************************************* bool operator==(const WCThreadRef& first, const WCThreadRef& second) { return (first.m_osThreadRef == second.m_osThreadRef); } bool operator!=(const WCThreadRef& first, const WCThreadRef& second) { return (first.m_osThreadRef != second.m_osThreadRef); } bool operator<(const WCThreadRef& first, const WCThreadRef& second) { return (first.m_osThreadRef < second.m_osThreadRef); } bool operator>(const WCThreadRef& first, const WCThreadRef& second) { return (first.m_osThreadRef > second.m_osThreadRef); } bool WCAtomicLock::obtain(const uint32_t in_num_trys) { bool retVal = false; uint32_t timeOut = in_num_trys; while (true) { retVal = Akupara::threading::atomic::compare_and_store(&m_the_lock, int32_t(0), int32_t(1)); if (retVal) { break; } else { if (--timeOut == 0) { break; } sleep_milliseconds(1000); } } return retVal; } void WCAtomicLock::release() { m_the_lock = 0; } } // namespace wvThread } // namespace wvNS {