X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ca9e2173a63d0e5a56fa9c2f8e1ff6ff32a9b71f..1fbfbfb0bf19e11ec98c2c1002cd561f16bc0b72:/src/unix/threadpsx.cpp diff --git a/src/unix/threadpsx.cpp b/src/unix/threadpsx.cpp index 2274d96da2..142268d1b0 100644 --- a/src/unix/threadpsx.cpp +++ b/src/unix/threadpsx.cpp @@ -67,16 +67,6 @@ #define THR_ID(thr) ((long)(thr)->GetId()) #endif -#ifdef __WXMAC__ - - // implement wxCriticalSection using mutexes -wxCriticalSection::wxCriticalSection() { } -wxCriticalSection::~wxCriticalSection() { } - -void wxCriticalSection::Enter() { (void)m_mutex.Lock(); } -void wxCriticalSection::Leave() { (void)m_mutex.Unlock(); } - -#endif // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -94,10 +84,10 @@ enum wxThreadState static const wxThread::ExitCode EXITCODE_CANCELLED = (wxThread::ExitCode)-1; // trace mask for wxThread operations -#define TRACE_THREADS _T("thread") +#define TRACE_THREADS wxT("thread") // you can get additional debugging messages for the semaphore operations -#define TRACE_SEMA _T("semaphore") +#define TRACE_SEMA wxT("semaphore") // ---------------------------------------------------------------------------- // private functions @@ -128,7 +118,11 @@ static wxArrayThread gs_allThreads; static wxMutex *gs_mutexAllThreads = NULL; // the id of the main thread -static pthread_t gs_tidMain = (pthread_t)-1; +// +// we suppose that 0 is not a valid pthread_t value but in principle this might +// be false (e.g. if it's a selector-like value), wxThread::IsMain() would need +// to be updated in such case +wxThreadIdType wxThread::ms_idMainThread = 0; // the key for the pointer to the associated wxThread object static pthread_key_t gs_keySelf; @@ -138,11 +132,11 @@ static pthread_key_t gs_keySelf; static size_t gs_nThreadsBeingDeleted = 0; // a mutex to protect gs_nThreadsBeingDeleted -static wxMutex *gs_mutexDeleteThread = (wxMutex *)NULL; +static wxMutex *gs_mutexDeleteThread = NULL; // and a condition variable which will be signaled when all // gs_nThreadsBeingDeleted will have been deleted -static wxCondition *gs_condAllDeleted = (wxCondition *)NULL; +static wxCondition *gs_condAllDeleted = NULL; // this mutex must be acquired before any call to a GUI function // (it's not inside #if wxUSE_GUI because this file is compiled as part @@ -188,6 +182,8 @@ private: private: pthread_mutex_t m_mutex; bool m_isOk; + wxMutexType m_type; + unsigned long m_owningThread; // wxConditionInternal uses our m_mutex friend class wxConditionInternal; @@ -202,6 +198,9 @@ extern "C" int pthread_mutexattr_settype(pthread_mutexattr_t *, int); wxMutexInternal::wxMutexInternal(wxMutexType mutexType) { + m_type = mutexType; + m_owningThread = 0; + int err; switch ( mutexType ) { @@ -233,7 +232,7 @@ wxMutexInternal::wxMutexInternal(wxMutexType mutexType) break; default: - wxFAIL_MSG( _T("unknown mutex type") ); + wxFAIL_MSG( wxT("unknown mutex type") ); // fall through case wxMUTEX_DEFAULT: @@ -262,6 +261,12 @@ wxMutexInternal::~wxMutexInternal() wxMutexError wxMutexInternal::Lock() { + if ((m_type == wxMUTEX_DEFAULT) && (m_owningThread != 0)) + { + if (m_owningThread == wxThread::GetCurrentId()) + return wxMUTEX_DEAD_LOCK; + } + return HandleLockResult(pthread_mutex_lock(&m_mutex)); } @@ -317,26 +322,30 @@ wxMutexError wxMutexInternal::Lock(unsigned long ms) wxMutexError wxMutexInternal::HandleLockResult(int err) { + // wxPrintf( "err %d\n", err ); + switch ( err ) { case EDEADLK: // only error checking mutexes return this value and so it's an // unexpected situation -- hence use assert, not wxLogDebug - wxFAIL_MSG( _T("mutex deadlock prevented") ); + wxFAIL_MSG( wxT("mutex deadlock prevented") ); return wxMUTEX_DEAD_LOCK; case EINVAL: - wxLogDebug(_T("pthread_mutex_[timed]lock(): mutex not initialized")); + wxLogDebug(wxT("pthread_mutex_[timed]lock(): mutex not initialized")); break; case ETIMEDOUT: return wxMUTEX_TIMEOUT; case 0: + if (m_type == wxMUTEX_DEFAULT) + m_owningThread = wxThread::GetCurrentId(); return wxMUTEX_NO_ERROR; default: - wxLogApiError(_T("pthread_mutex_[timed]lock()"), err); + wxLogApiError(wxT("pthread_mutex_[timed]lock()"), err); } return wxMUTEX_MISC_ERROR; @@ -354,14 +363,16 @@ wxMutexError wxMutexInternal::TryLock() return wxMUTEX_BUSY; case EINVAL: - wxLogDebug(_T("pthread_mutex_trylock(): mutex not initialized.")); + wxLogDebug(wxT("pthread_mutex_trylock(): mutex not initialized.")); break; case 0: + if (m_type == wxMUTEX_DEFAULT) + m_owningThread = wxThread::GetCurrentId(); return wxMUTEX_NO_ERROR; default: - wxLogApiError(_T("pthread_mutex_trylock()"), err); + wxLogApiError(wxT("pthread_mutex_trylock()"), err); } return wxMUTEX_MISC_ERROR; @@ -369,6 +380,8 @@ wxMutexError wxMutexInternal::TryLock() wxMutexError wxMutexInternal::Unlock() { + m_owningThread = 0; + int err = pthread_mutex_unlock(&m_mutex); switch ( err ) { @@ -377,14 +390,14 @@ wxMutexError wxMutexInternal::Unlock() return wxMUTEX_UNLOCKED; case EINVAL: - wxLogDebug(_T("pthread_mutex_unlock(): mutex not initialized.")); + wxLogDebug(wxT("pthread_mutex_unlock(): mutex not initialized.")); break; case 0: return wxMUTEX_NO_ERROR; default: - wxLogApiError(_T("pthread_mutex_unlock()"), err); + wxLogApiError(wxT("pthread_mutex_unlock()"), err); } return wxMUTEX_MISC_ERROR; @@ -433,7 +446,7 @@ wxConditionInternal::wxConditionInternal(wxMutex& mutex) if ( !m_isOk ) { - wxLogApiError(_T("pthread_cond_init()"), err); + wxLogApiError(wxT("pthread_cond_init()"), err); } } @@ -444,7 +457,7 @@ wxConditionInternal::~wxConditionInternal() int err = pthread_cond_destroy(&m_cond); if ( err != 0 ) { - wxLogApiError(_T("pthread_cond_destroy()"), err); + wxLogApiError(wxT("pthread_cond_destroy()"), err); } } } @@ -454,7 +467,7 @@ wxCondError wxConditionInternal::Wait() int err = pthread_cond_wait(&m_cond, GetPMutex()); if ( err != 0 ) { - wxLogApiError(_T("pthread_cond_wait()"), err); + wxLogApiError(wxT("pthread_cond_wait()"), err); return wxCOND_MISC_ERROR; } @@ -487,7 +500,7 @@ wxCondError wxConditionInternal::WaitTimeout(unsigned long milliseconds) return wxCOND_NO_ERROR; default: - wxLogApiError(_T("pthread_cond_timedwait()"), err); + wxLogApiError(wxT("pthread_cond_timedwait()"), err); } return wxCOND_MISC_ERROR; @@ -498,7 +511,7 @@ wxCondError wxConditionInternal::Signal() int err = pthread_cond_signal(&m_cond); if ( err != 0 ) { - wxLogApiError(_T("pthread_cond_signal()"), err); + wxLogApiError(wxT("pthread_cond_signal()"), err); return wxCOND_MISC_ERROR; } @@ -511,7 +524,7 @@ wxCondError wxConditionInternal::Broadcast() int err = pthread_cond_broadcast(&m_cond); if ( err != 0 ) { - wxLogApiError(_T("pthread_cond_broadcast()"), err); + wxLogApiError(wxT("pthread_cond_broadcast()"), err); return wxCOND_MISC_ERROR; } @@ -560,7 +573,7 @@ wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount) if ( (initialcount < 0 || maxcount < 0) || ((maxcount > 0) && (initialcount > maxcount)) ) { - wxFAIL_MSG( _T("wxSemaphore: invalid initial or maximal count") ); + wxFAIL_MSG( wxT("wxSemaphore: invalid initial or maximal count") ); m_isOk = false; } @@ -580,14 +593,14 @@ wxSemaError wxSemaphoreInternal::Wait() while ( m_count == 0 ) { wxLogTrace(TRACE_SEMA, - _T("Thread %ld waiting for semaphore to become signalled"), + wxT("Thread %p waiting for semaphore to become signalled"), wxThread::GetCurrentId()); if ( m_cond.Wait() != wxCOND_NO_ERROR ) return wxSEMA_MISC_ERROR; wxLogTrace(TRACE_SEMA, - _T("Thread %ld finished waiting for semaphore, count = %lu"), + wxT("Thread %p finished waiting for semaphore, count = %lu"), wxThread::GetCurrentId(), (unsigned long)m_count); } @@ -654,7 +667,7 @@ wxSemaError wxSemaphoreInternal::Post() m_count++; wxLogTrace(TRACE_SEMA, - _T("Thread %ld about to signal semaphore, count = %lu"), + wxT("Thread %p about to signal semaphore, count = %lu"), wxThread::GetCurrentId(), (unsigned long)m_count); return m_cond.Signal() == wxCOND_NO_ERROR ? wxSEMA_NO_ERROR @@ -711,18 +724,18 @@ public: wxThreadState GetState() const { return m_state; } void SetState(wxThreadState state) { -#ifdef __WXDEBUG__ - static const wxChar *stateNames[] = +#if wxUSE_LOG_TRACE + static const wxChar *const stateNames[] = { - _T("NEW"), - _T("RUNNING"), - _T("PAUSED"), - _T("EXITED"), + wxT("NEW"), + wxT("RUNNING"), + wxT("PAUSED"), + wxT("EXITED"), }; - wxLogTrace(TRACE_THREADS, _T("Thread %ld: %s => %s."), - (long)GetId(), stateNames[m_state], stateNames[state]); -#endif // __WXDEBUG__ + wxLogTrace(TRACE_THREADS, wxT("Thread %p: %s => %s."), + GetId(), stateNames[m_state], stateNames[state]); +#endif // wxUSE_LOG_TRACE m_state = state; } @@ -797,7 +810,7 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) { wxThreadInternal *pthread = thread->m_internal; - wxLogTrace(TRACE_THREADS, _T("Thread %ld started."), THR_ID(pthread)); + wxLogTrace(TRACE_THREADS, wxT("Thread %p started."), THR_ID(pthread)); // associate the thread pointer with the newly created thread so that // wxThread::This() will work @@ -835,7 +848,7 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) { // call the main entry wxLogTrace(TRACE_THREADS, - _T("Thread %ld about to enter its Entry()."), + wxT("Thread %p about to enter its Entry()."), THR_ID(pthread)); wxTRY @@ -843,7 +856,7 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) pthread->m_exitcode = thread->Entry(); wxLogTrace(TRACE_THREADS, - _T("Thread %ld Entry() returned %lu."), + wxT("Thread %p Entry() returned %lu."), THR_ID(pthread), wxPtrToUInt(pthread->m_exitcode)); } wxCATCH_ALL( wxTheApp->OnUnhandledException(); ) @@ -958,7 +971,7 @@ wxThreadError wxThreadInternal::Run() void wxThreadInternal::Wait() { - wxCHECK_RET( !m_isDetached, _T("can't wait for a detached thread") ); + wxCHECK_RET( !m_isDetached, wxT("can't wait for a detached thread") ); // if the thread we're waiting for is waiting for the GUI mutex, we will // deadlock so make sure we release it temporarily @@ -966,7 +979,7 @@ void wxThreadInternal::Wait() wxMutexGuiLeave(); wxLogTrace(TRACE_THREADS, - _T("Starting to wait for thread %ld to exit."), + wxT("Starting to wait for thread %p to exit."), THR_ID(this)); // to avoid memory leaks we should call pthread_join(), but it must only be @@ -1006,7 +1019,7 @@ void wxThreadInternal::Pause() wxT("thread must first be paused with wxThread::Pause().") ); wxLogTrace(TRACE_THREADS, - _T("Thread %ld goes to sleep."), THR_ID(this)); + wxT("Thread %p goes to sleep."), THR_ID(this)); // wait until the semaphore is Post()ed from Resume() m_semSuspend.Wait(); @@ -1022,7 +1035,7 @@ void wxThreadInternal::Resume() if ( IsReallyPaused() ) { wxLogTrace(TRACE_THREADS, - _T("Waking up thread %ld"), THR_ID(this)); + wxT("Waking up thread %p"), THR_ID(this)); // wake up Pause() m_semSuspend.Post(); @@ -1033,7 +1046,7 @@ void wxThreadInternal::Resume() else { wxLogTrace(TRACE_THREADS, - _T("Thread %ld is not yet really paused"), THR_ID(this)); + wxT("Thread %p is not yet really paused"), THR_ID(this)); } SetState(STATE_RUNNING); @@ -1048,11 +1061,6 @@ wxThread *wxThread::This() return (wxThread *)pthread_getspecific(gs_keySelf); } -bool wxThread::IsMain() -{ - return (bool)pthread_equal(pthread_self(), gs_tidMain) || gs_tidMain == (pthread_t)-1; -} - void wxThread::Yield() { #ifdef HAVE_SCHED_YIELD @@ -1074,7 +1082,7 @@ int wxThread::GetCPUCount() // it has 0 size but still can be read from) wxLogNull nolog; - wxFFile file(_T("/proc/cpuinfo")); + wxFFile file(wxT("/proc/cpuinfo")); if ( file.IsOpened() ) { // slurp the whole file @@ -1082,17 +1090,17 @@ int wxThread::GetCPUCount() if ( file.ReadAll(&s) ) { // (ab)use Replace() to find the number of "processor: num" strings - size_t count = s.Replace(_T("processor\t:"), _T("")); + size_t count = s.Replace(wxT("processor\t:"), wxT("")); if ( count > 0 ) { return count; } - wxLogDebug(_T("failed to parse /proc/cpuinfo")); + wxLogDebug(wxT("failed to parse /proc/cpuinfo")); } else { - wxLogDebug(_T("failed to read /proc/cpuinfo")); + wxLogDebug(wxT("failed to read /proc/cpuinfo")); } } #endif // different ways to get number of CPUs @@ -1101,23 +1109,11 @@ int wxThread::GetCPUCount() return -1; } -// VMS is a 64 bit system and threads have 64 bit pointers. -// FIXME: also needed for other systems???? -#ifdef __VMS -unsigned long long wxThread::GetCurrentId() -{ - return (unsigned long long)pthread_self(); -} - -#else // !__VMS - -unsigned long wxThread::GetCurrentId() +wxThreadIdType wxThread::GetCurrentId() { - return (unsigned long)pthread_self(); + return (wxThreadIdType)pthread_self(); } -#endif // __VMS/!__VMS - bool wxThread::SetConcurrency(size_t level) { @@ -1125,7 +1121,7 @@ bool wxThread::SetConcurrency(size_t level) int rc = thr_setconcurrency(level); if ( rc != 0 ) { - wxLogSysError(rc, _T("thr_setconcurrency() failed")); + wxLogSysError(rc, wxT("thr_setconcurrency() failed")); } return rc == 0; @@ -1218,14 +1214,14 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED_STACKSIZE(stackSize)) struct sched_param sp; if ( pthread_attr_getschedparam(&attr, &sp) != 0 ) { - wxFAIL_MSG(_T("pthread_attr_getschedparam() failed")); + wxFAIL_MSG(wxT("pthread_attr_getschedparam() failed")); } sp.sched_priority = min_prio + (prio*(max_prio - min_prio))/100; if ( pthread_attr_setschedparam(&attr, &sp) != 0 ) { - wxFAIL_MSG(_T("pthread_attr_setschedparam(priority) failed")); + wxFAIL_MSG(wxT("pthread_attr_setschedparam(priority) failed")); } } #endif // HAVE_THREAD_PRIORITY_FUNCTIONS @@ -1234,7 +1230,7 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED_STACKSIZE(stackSize)) // this will make the threads created by this process really concurrent if ( pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) != 0 ) { - wxFAIL_MSG(_T("pthread_attr_setscope(PTHREAD_SCOPE_SYSTEM) failed")); + wxFAIL_MSG(wxT("pthread_attr_setscope(PTHREAD_SCOPE_SYSTEM) failed")); } #endif // HAVE_PTHREAD_ATTR_SETSCOPE @@ -1245,7 +1241,7 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED_STACKSIZE(stackSize)) { if ( pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0 ) { - wxFAIL_MSG(_T("pthread_attr_setdetachstate(DETACHED) failed")); + wxFAIL_MSG(wxT("pthread_attr_setdetachstate(DETACHED) failed")); } // never try to join detached threads @@ -1264,7 +1260,7 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED_STACKSIZE(stackSize)) if ( pthread_attr_destroy(&attr) != 0 ) { - wxFAIL_MSG(_T("pthread_attr_destroy() failed")); + wxFAIL_MSG(wxT("pthread_attr_destroy() failed")); } if ( rc != 0 ) @@ -1366,7 +1362,7 @@ wxThreadIdType wxThread::GetId() const wxThreadError wxThread::Pause() { wxCHECK_MSG( This() != this, wxTHREAD_MISC_ERROR, - _T("a thread can't pause itself") ); + wxT("a thread can't pause itself") ); wxCriticalSectionLocker lock(m_critsect); @@ -1387,7 +1383,7 @@ wxThreadError wxThread::Pause() wxThreadError wxThread::Resume() { wxCHECK_MSG( This() != this, wxTHREAD_MISC_ERROR, - _T("a thread can't resume itself") ); + wxT("a thread can't resume itself") ); wxCriticalSectionLocker lock(m_critsect); @@ -1396,7 +1392,7 @@ wxThreadError wxThread::Resume() switch ( state ) { case STATE_PAUSED: - wxLogTrace(TRACE_THREADS, _T("Thread %ld suspended, resuming."), + wxLogTrace(TRACE_THREADS, wxT("Thread %p suspended, resuming."), GetId()); m_internal->Resume(); @@ -1404,12 +1400,12 @@ wxThreadError wxThread::Resume() return wxTHREAD_NO_ERROR; case STATE_EXITED: - wxLogTrace(TRACE_THREADS, _T("Thread %ld exited, won't resume."), + wxLogTrace(TRACE_THREADS, wxT("Thread %p exited, won't resume."), GetId()); return wxTHREAD_NO_ERROR; default: - wxLogDebug(_T("Attempt to resume a thread which is not paused.")); + wxLogDebug(wxT("Attempt to resume a thread which is not paused.")); return wxTHREAD_MISC_ERROR; } @@ -1422,10 +1418,10 @@ wxThreadError wxThread::Resume() wxThread::ExitCode wxThread::Wait() { wxCHECK_MSG( This() != this, (ExitCode)-1, - _T("a thread can't wait for itself") ); + wxT("a thread can't wait for itself") ); wxCHECK_MSG( !m_isDetached, (ExitCode)-1, - _T("can't wait for detached thread") ); + wxT("can't wait for detached thread") ); m_internal->Wait(); @@ -1435,7 +1431,7 @@ wxThread::ExitCode wxThread::Wait() wxThreadError wxThread::Delete(ExitCode *rc) { wxCHECK_MSG( This() != this, wxTHREAD_MISC_ERROR, - _T("a thread can't delete itself") ); + wxT("a thread can't delete itself") ); bool isDetached = m_isDetached; @@ -1488,7 +1484,7 @@ wxThreadError wxThread::Delete(ExitCode *rc) wxThreadError wxThread::Kill() { wxCHECK_MSG( This() != this, wxTHREAD_MISC_ERROR, - _T("a thread can't kill itself") ); + wxT("a thread can't kill itself") ); switch ( m_internal->GetState() ) { @@ -1539,7 +1535,7 @@ wxThreadError wxThread::Kill() void wxThread::Exit(ExitCode status) { wxASSERT_MSG( This() == this, - _T("wxThread::Exit() can only be called in the context of the same thread") ); + wxT("wxThread::Exit() can only be called in the context of the same thread") ); if ( m_isDetached ) { @@ -1582,14 +1578,14 @@ void wxThread::Exit(ExitCode status) // terminate the thread (pthread_exit() never returns) pthread_exit(status); - wxFAIL_MSG(_T("pthread_exit() failed")); + wxFAIL_MSG(wxT("pthread_exit() failed")); } // also test whether we were paused bool wxThread::TestDestroy() { wxASSERT_MSG( This() == this, - _T("wxThread::TestDestroy() can only be called in the context of the same thread") ); + wxT("wxThread::TestDestroy() can only be called in the context of the same thread") ); m_critsect.Enter(); @@ -1615,19 +1611,17 @@ bool wxThread::TestDestroy() wxThread::~wxThread() { -#ifdef __WXDEBUG__ m_critsect.Enter(); // check that the thread either exited or couldn't be created if ( m_internal->GetState() != STATE_EXITED && m_internal->GetState() != STATE_NEW ) { - wxLogDebug(_T("The thread %ld is being destroyed although it is still running! The application may crash."), + wxLogDebug(wxT("The thread %ld is being destroyed although it is still running! The application may crash."), (long)GetId()); } m_critsect.Leave(); -#endif // __WXDEBUG__ delete m_internal; @@ -1698,7 +1692,7 @@ bool wxThreadModule::OnInit() return false; } - gs_tidMain = pthread_self(); + wxThread::ms_idMainThread = wxThread::GetCurrentId(); gs_mutexAllThreads = new wxMutex(); @@ -1725,7 +1719,7 @@ void wxThreadModule::OnExit() if ( nThreadsBeingDeleted > 0 ) { wxLogTrace(TRACE_THREADS, - _T("Waiting for %lu threads to disappear"), + wxT("Waiting for %lu threads to disappear"), (unsigned long)nThreadsBeingDeleted); // have to wait until all of them disappear @@ -1777,25 +1771,26 @@ static void ScheduleThreadForDeletion() gs_nThreadsBeingDeleted++; - wxLogTrace(TRACE_THREADS, _T("%lu thread%s waiting to be deleted"), + wxLogTrace(TRACE_THREADS, wxT("%lu thread%s waiting to be deleted"), (unsigned long)gs_nThreadsBeingDeleted, - gs_nThreadsBeingDeleted == 1 ? _T("") : _T("s")); + gs_nThreadsBeingDeleted == 1 ? wxT("") : wxT("s")); } static void DeleteThread(wxThread *This) { - // gs_mutexDeleteThread should be unlocked before signalling the condition - // or wxThreadModule::OnExit() would deadlock - wxMutexLocker locker( *gs_mutexDeleteThread ); - - wxLogTrace(TRACE_THREADS, _T("Thread %ld auto deletes."), This->GetId()); + wxLogTrace(TRACE_THREADS, wxT("Thread %p auto deletes."), This->GetId()); delete This; + // only lock gs_mutexDeleteThread after deleting the thread to avoid + // calling out into user code with it locked as this may result in + // deadlocks if the thread dtor deletes another thread (see #11501) + wxMutexLocker locker( *gs_mutexDeleteThread ); + wxCHECK_RET( gs_nThreadsBeingDeleted > 0, - _T("no threads scheduled for deletion, yet we delete one?") ); + wxT("no threads scheduled for deletion, yet we delete one?") ); - wxLogTrace(TRACE_THREADS, _T("%lu scheduled for deletion threads left."), + wxLogTrace(TRACE_THREADS, wxT("%lu threads remain scheduled for deletion."), (unsigned long)gs_nThreadsBeingDeleted - 1); if ( !--gs_nThreadsBeingDeleted )