X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1dfc3cda6eb139a87773646aacde950c9c45126a..137c8bde085d6d5b7c459902d2ea1a198ab48765:/src/unix/threadpsx.cpp diff --git a/src/unix/threadpsx.cpp b/src/unix/threadpsx.cpp index 1b93fa7f52..1e538342f7 100644 --- a/src/unix/threadpsx.cpp +++ b/src/unix/threadpsx.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: threadpsx.cpp +// Name: src/unix/threadpsx.cpp // Purpose: wxThread (Posix) Implementation // Author: Original from Wolfram Gloger/Guilhem Lavaux // Modified by: K. S. Sreeram (2002): POSIXified wxCondition, added wxSemaphore @@ -21,28 +21,30 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ - #pragma implementation "thread.h" -#endif - -#include "wx/defs.h" +// for compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" #if wxUSE_THREADS #include "wx/thread.h" + +#ifndef WX_PRECOMP + #include "wx/dynarray.h" + #include "wx/intl.h" + #include "wx/log.h" + #include "wx/utils.h" + #include "wx/timer.h" +#endif + #include "wx/module.h" -#include "wx/utils.h" -#include "wx/log.h" -#include "wx/intl.h" -#include "wx/dynarray.h" -#include "wx/timer.h" +#include "wx/stopwatch.h" #include #include #include #include #include -#if HAVE_SCHED_H +#ifdef HAVE_SCHED_H #include #endif @@ -58,6 +60,12 @@ #include #endif +#ifdef __VMS + #define THR_ID(thr) ((long long)(thr)->GetId()) +#else + #define THR_ID(thr) ((long)(thr)->GetId()) +#endif + // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -92,7 +100,7 @@ static void DeleteThread(wxThread *This); // ---------------------------------------------------------------------------- // an (non owning) array of pointers to threads -WX_DEFINE_ARRAY(wxThread *, wxArrayThread); +WX_DEFINE_ARRAY_PTR(wxThread *, wxArrayThread); // an entry for a thread we can wait for @@ -106,7 +114,7 @@ WX_DEFINE_ARRAY(wxThread *, wxArrayThread); static wxArrayThread gs_allThreads; // the id of the main thread -static pthread_t gs_tidMain; +static pthread_t gs_tidMain = (pthread_t)-1; // the key for the pointer to the associated wxThread object static pthread_key_t gs_keySelf; @@ -122,10 +130,10 @@ static wxMutex *gs_mutexDeleteThread = (wxMutex *)NULL; // gs_nThreadsBeingDeleted will have been deleted static wxCondition *gs_condAllDeleted = (wxCondition *)NULL; -#if wxUSE_GUI - // this mutex must be acquired before any call to a GUI function - static wxMutex *gs_mutexGui; -#endif // wxUSE_GUI +// 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 +// of wxBase) +static wxMutex *gs_mutexGui = NULL; // when we wait for a thread to exit, we're blocking on a condition which the // thread signals in its SignalExit() method -- but this condition can't be a @@ -166,7 +174,8 @@ private: friend class wxConditionInternal; }; -#ifdef HAVE_PTHREAD_MUTEXATTR_T +#if defined(HAVE_PTHREAD_MUTEXATTR_T) && \ + wxUSE_UNIX && !defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE_DECL) // on some systems pthread_mutexattr_settype() is not in the headers (but it is // in the library, otherwise we wouldn't compile this code at all) extern "C" int pthread_mutexattr_settype(pthread_mutexattr_t *, int); @@ -476,7 +485,7 @@ wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount) { wxFAIL_MSG( _T("wxSemaphore: invalid initial or maximal count") ); - m_isOk = FALSE; + m_isOk = false; } else { @@ -494,14 +503,14 @@ wxSemaError wxSemaphoreInternal::Wait() while ( m_count == 0 ) { wxLogTrace(TRACE_SEMA, - "Thread %ld waiting for semaphore to become signalled", + _T("Thread %ld waiting for semaphore to become signalled"), wxThread::GetCurrentId()); if ( m_cond.Wait() != wxCOND_NO_ERROR ) return wxSEMA_MISC_ERROR; wxLogTrace(TRACE_SEMA, - "Thread %ld finished waiting for semaphore, count = %lu", + _T("Thread %ld finished waiting for semaphore, count = %lu"), wxThread::GetCurrentId(), (unsigned long)m_count); } @@ -568,7 +577,7 @@ wxSemaError wxSemaphoreInternal::Post() m_count++; wxLogTrace(TRACE_SEMA, - "Thread %ld about to signal semaphore, count = %lu", + _T("Thread %ld about to signal semaphore, count = %lu"), wxThread::GetCurrentId(), (unsigned long)m_count); return m_cond.Signal() == wxCOND_NO_ERROR ? wxSEMA_NO_ERROR @@ -583,10 +592,10 @@ wxSemaError wxSemaphoreInternal::Post() extern "C" { -#if HAVE_THREAD_CLEANUP_FUNCTIONS +#ifdef wxHAVE_PTHREAD_CLEANUP // thread exit function void wxPthreadCleanup(void *ptr); -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS +#endif // wxHAVE_PTHREAD_CLEANUP void *wxPthreadStart(void *ptr); @@ -644,7 +653,7 @@ public: pthread_t GetId() const { return m_threadId; } pthread_t *GetIdPtr() { return &m_threadId; } // "cancelled" flag - void SetCancelFlag() { m_cancelled = TRUE; } + void SetCancelFlag() { m_cancelled = true; } bool WasCancelled() const { return m_cancelled; } // exit code void SetExitCode(wxThread::ExitCode exitcode) { m_exitcode = exitcode; } @@ -659,19 +668,19 @@ public: { wxCriticalSectionLocker lock(m_csJoinFlag); - m_shouldBeJoined = FALSE; - m_isDetached = TRUE; + m_shouldBeJoined = false; + m_isDetached = true; } -#if HAVE_THREAD_CLEANUP_FUNCTIONS +#ifdef wxHAVE_PTHREAD_CLEANUP // this is used by wxPthreadCleanup() only static void Cleanup(wxThread *thread); -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS +#endif // wxHAVE_PTHREAD_CLEANUP private: pthread_t m_threadId; // id of the thread wxThreadState m_state; // see wxThreadState enum - int m_prio; // in wxWindows units: from 0 to 100 + int m_prio; // in wxWidgets units: from 0 to 100 // this flag is set when the thread should terminate bool m_cancelled; @@ -711,12 +720,8 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) { wxThreadInternal *pthread = thread->m_internal; -#ifdef __VMS - wxLogTrace(TRACE_THREADS, _T("Thread %ld started."), (long long)pthread->GetId()); -#else - wxLogTrace(TRACE_THREADS, _T("Thread %ld started."), (long)pthread->GetId()); -#endif - + wxLogTrace(TRACE_THREADS, _T("Thread %ld started."), THR_ID(pthread)); + // associate the thread pointer with the newly created thread so that // wxThread::This() will work int rc = pthread_setspecific(gs_keySelf, thread); @@ -731,11 +736,11 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) // block! bool dontRunAtAll; -#if HAVE_THREAD_CLEANUP_FUNCTIONS +#ifdef wxHAVE_PTHREAD_CLEANUP // install the cleanup handler which will be called if the thread is // cancelled pthread_cleanup_push(wxPthreadCleanup, thread); -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS +#endif // wxHAVE_PTHREAD_CLEANUP // wait for the semaphore to be posted from Run() pthread->m_semRun.Wait(); @@ -752,22 +757,16 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) if ( !dontRunAtAll ) { // call the main entry - wxLogTrace(TRACE_THREADS, _T("Thread %ld about to enter its Entry()."), -#ifdef __VMS - (long long)pthread->GetId()); -#else - (long)pthread->GetId()); -#endif - + wxLogTrace(TRACE_THREADS, + _T("Thread %ld about to enter its Entry()."), + THR_ID(pthread)); + pthread->m_exitcode = thread->Entry(); - wxLogTrace(TRACE_THREADS, _T("Thread %ld Entry() returned %lu."), -#ifdef __VMS - (long long)pthread->GetId(), (unsigned long)pthread->m_exitcode); -#else - (long)pthread->GetId(), (unsigned long)pthread->m_exitcode); -#endif - + wxLogTrace(TRACE_THREADS, + _T("Thread %ld Entry() returned %lu."), + THR_ID(pthread), wxPtrToUInt(pthread->m_exitcode)); + { wxCriticalSectionLocker lock(thread->m_critsect); @@ -778,13 +777,22 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) } } - // NB: at least under Linux, pthread_cleanup_push/pop are macros and pop - // contains the matching '}' for the '{' in push, so they must be used - // in the same block! -#if HAVE_THREAD_CLEANUP_FUNCTIONS + // NB: pthread_cleanup_push/pop() are macros and pop contains the matching + // '}' for the '{' in push, so they must be used in the same block! +#ifdef wxHAVE_PTHREAD_CLEANUP + #ifdef __DECCXX + // under Tru64 we get a warning from macro expansion + #pragma message save + #pragma message disable(declbutnotref) + #endif + // remove the cleanup handler without executing it pthread_cleanup_pop(FALSE); -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS + + #ifdef __DECCXX + #pragma message restore + #endif +#endif // wxHAVE_PTHREAD_CLEANUP if ( dontRunAtAll ) { @@ -804,7 +812,7 @@ void *wxThreadInternal::PthreadStart(wxThread *thread) } } -#if HAVE_THREAD_CLEANUP_FUNCTIONS +#ifdef wxHAVE_PTHREAD_CLEANUP // this handler is called when the thread is cancelled extern "C" void wxPthreadCleanup(void *ptr) @@ -814,6 +822,7 @@ extern "C" void wxPthreadCleanup(void *ptr) void wxThreadInternal::Cleanup(wxThread *thread) { + if (pthread_getspecific(gs_keySelf) == 0) return; { wxCriticalSectionLocker lock(thread->m_critsect); if ( thread->m_internal->GetState() == STATE_EXITED ) @@ -827,7 +836,7 @@ void wxThreadInternal::Cleanup(wxThread *thread) thread->Exit(EXITCODE_CANCELLED); } -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS +#endif // wxHAVE_PTHREAD_CLEANUP // ---------------------------------------------------------------------------- // wxThreadInternal @@ -836,17 +845,17 @@ void wxThreadInternal::Cleanup(wxThread *thread) wxThreadInternal::wxThreadInternal() { m_state = STATE_NEW; - m_cancelled = FALSE; + m_cancelled = false; m_prio = WXTHREAD_DEFAULT_PRIORITY; m_threadId = 0; m_exitcode = 0; - // set to TRUE only when the thread starts waiting on m_semSuspend - m_isPaused = FALSE; + // set to true only when the thread starts waiting on m_semSuspend + m_isPaused = false; // defaults for joinable threads - m_shouldBeJoined = TRUE; - m_isDetached = FALSE; + m_shouldBeJoined = true; + m_isDetached = false; } wxThreadInternal::~wxThreadInternal() @@ -876,12 +885,9 @@ void wxThreadInternal::Wait() wxMutexGuiLeave(); wxLogTrace(TRACE_THREADS, -#ifdef __VMS - _T("Starting to wait for thread %ld to exit."), (long long)GetId()); -#else - _T("Starting to wait for thread %ld to exit."), (long)GetId()); -#endif - + _T("Starting to wait for thread %ld to exit."), + THR_ID(this)); + // to avoid memory leaks we should call pthread_join(), but it must only be // done once so use a critical section to serialize the code below { @@ -899,11 +905,10 @@ void wxThreadInternal::Wait() // wxLogDebug: it is possible to bring the system to its knees // by creating too many threads and not joining them quite // easily - wxLogError(_("Failed to join a thread, potential memory leak " - "detected - please restart the program")); + wxLogError(_("Failed to join a thread, potential memory leak detected - please restart the program")); } - m_shouldBeJoined = FALSE; + m_shouldBeJoined = false; } } @@ -919,12 +924,9 @@ void wxThreadInternal::Pause() wxCHECK_RET( m_state == STATE_PAUSED, wxT("thread must first be paused with wxThread::Pause().") ); -#ifdef __VMS - wxLogTrace(TRACE_THREADS, _T("Thread %ld goes to sleep."), (long long)GetId()); -#else - wxLogTrace(TRACE_THREADS, _T("Thread %ld goes to sleep."), (long)GetId()); -#endif - + wxLogTrace(TRACE_THREADS, + _T("Thread %ld goes to sleep."), THR_ID(this)); + // wait until the semaphore is Post()ed from Resume() m_semSuspend.Wait(); } @@ -938,26 +940,19 @@ void wxThreadInternal::Resume() // TestDestroy() since the last call to Pause() for example if ( IsReallyPaused() ) { -#ifdef __VMS - wxLogTrace(TRACE_THREADS, _T("Waking up thread %ld"), (long long)GetId()); -#else - wxLogTrace(TRACE_THREADS, _T("Waking up thread %ld"), (long)GetId()); -#endif - + wxLogTrace(TRACE_THREADS, + _T("Waking up thread %ld"), THR_ID(this)); + // wake up Pause() m_semSuspend.Post(); // reset the flag - SetReallyPaused(FALSE); + SetReallyPaused(false); } else { - wxLogTrace(TRACE_THREADS, _T("Thread %ld is not yet really paused"), -#ifdef __VMS - (long long)GetId()); -#else - (long)GetId()); -#endif + wxLogTrace(TRACE_THREADS, + _T("Thread %ld is not yet really paused"), THR_ID(this)); } SetState(STATE_RUNNING); @@ -974,7 +969,7 @@ wxThread *wxThread::This() bool wxThread::IsMain() { - return (bool)pthread_equal(pthread_self(), gs_tidMain); + return (bool)pthread_equal(pthread_self(), gs_tidMain) || gs_tidMain == (pthread_t)-1; } void wxThread::Yield() @@ -986,7 +981,7 @@ void wxThread::Yield() void wxThread::Sleep(unsigned long milliseconds) { - wxUsleep(milliseconds); + wxMilliSleep(milliseconds); } int wxThread::GetCPUCount() @@ -1030,19 +1025,24 @@ 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 - // VMS is a 64 bit system and threads have 64 bit pointers. - // ??? also needed for other systems???? unsigned long long wxThread::GetCurrentId() { return (unsigned long long)pthread_self(); -#else +} + +#else // !__VMS + unsigned long wxThread::GetCurrentId() { return (unsigned long)pthread_self(); -#endif } +#endif // __VMS/!__VMS + + bool wxThread::SetConcurrency(size_t level) { #ifdef HAVE_THR_SETCONCURRENCY @@ -1073,7 +1073,13 @@ wxThread::wxThread(wxThreadKind kind) m_isDetached = kind == wxTHREAD_DETACHED; } -wxThreadError wxThread::Create(unsigned int WXUNUSED(stackSize)) +#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE + #define WXUNUSED_STACKSIZE(identifier) identifier +#else + #define WXUNUSED_STACKSIZE(identifier) WXUNUSED(identifier) +#endif + +wxThreadError wxThread::Create(unsigned int WXUNUSED_STACKSIZE(stackSize)) { if ( m_internal->GetState() != STATE_NEW ) { @@ -1085,6 +1091,11 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED(stackSize)) pthread_attr_t attr; pthread_attr_init(&attr); +#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE + if (stackSize) + pthread_attr_setstacksize(&attr, stackSize); +#endif + #ifdef HAVE_THREAD_PRIORITY_FUNCTIONS int policy; if ( pthread_attr_getschedpolicy(&attr, &policy) != 0 ) @@ -1183,8 +1194,6 @@ wxThreadError wxThread::Create(unsigned int WXUNUSED(stackSize)) return wxTHREAD_NO_RESOURCE; } - m_state = STATE_NEW; - return wxTHREAD_NO_ERROR; } @@ -1221,42 +1230,21 @@ void wxThread::SetPriority(unsigned int prio) case STATE_PAUSED: #ifdef HAVE_THREAD_PRIORITY_FUNCTIONS #if defined(__LINUX__) -// On Linux, pthread_setschedparam with SCHED_OTHER does not allow -// a priority other than 0. Instead, we use the BSD setpriority -// which alllows us to set a 'nice' value between 20 to -20. Only -// super user can set a value less than zero (more negative yields -// higher priority). setpriority set the static priority of a process, -// but this is OK since Linux is configured as a thread per process. - { - float fPrio; - float pSpan; - int iPrio; - - // Map Wx priorites (WXTHREAD_MIN_PRIORITY - - // WXTHREAD_MAX_PRIORITY) into BSD priorities (20 - -20). - // Do calculation of values instead of hard coding them - // to make maintenance easier. - - pSpan = ((float)(WXTHREAD_MAX_PRIORITY - WXTHREAD_MIN_PRIORITY)) / 2.0; - - // prio starts as ................... // value => (0) >= p <= (n) - - fPrio = ((float)prio) - pSpan; // value => (-n) >= p <= (+n) - - fPrio = 0.0 - fPrio; // value => (+n) <= p >= (-n) - - fPrio = fPrio * (20. / pSpan) + .5; // value => (20) <= p >= (-20) - - iPrio = (int)fPrio; - - // Clamp prio from 20 - -20; - iPrio = (iPrio > 20) ? 20 : iPrio; - iPrio = (iPrio < -20) ? -20 : iPrio; + // On Linux, pthread_setschedparam with SCHED_OTHER does not allow + // a priority other than 0. Instead, we use the BSD setpriority + // which alllows us to set a 'nice' value between 20 to -20. Only + // super user can set a value less than zero (more negative yields + // higher priority). setpriority set the static priority of a + // process, but this is OK since Linux is configured as a thread + // per process. + // + // FIXME this is not true for 2.6!! - if (setpriority(PRIO_PROCESS, 0, iPrio) == -1) - { - wxLogError(_("Failed to set thread priority %d."), prio); - } + // map wx priorites WXTHREAD_MIN_PRIORITY..WXTHREAD_MAX_PRIORITY + // to Unix priorities 20..-20 + if ( setpriority(PRIO_PROCESS, 0, -(2*prio)/5 + 20) == -1 ) + { + wxLogError(_("Failed to set thread priority %d."), prio); } #else // __LINUX__ { @@ -1437,25 +1425,26 @@ wxThreadError wxThread::Kill() default: #ifdef HAVE_PTHREAD_CANCEL if ( pthread_cancel(m_internal->GetId()) != 0 ) -#endif +#endif // HAVE_PTHREAD_CANCEL { wxLogError(_("Failed to terminate a thread.")); return wxTHREAD_MISC_ERROR; } +#ifdef HAVE_PTHREAD_CANCEL if ( m_isDetached ) { // if we use cleanup function, this will be done from // wxPthreadCleanup() -#if !HAVE_THREAD_CLEANUP_FUNCTIONS +#ifndef wxHAVE_PTHREAD_CLEANUP ScheduleThreadForDeletion(); // don't call OnExit() here, it can only be called in the // threads context and we're in the context of another thread DeleteThread(this); -#endif // HAVE_THREAD_CLEANUP_FUNCTIONS +#endif // wxHAVE_PTHREAD_CLEANUP } else { @@ -1463,14 +1452,14 @@ wxThreadError wxThread::Kill() } return wxTHREAD_NO_ERROR; +#endif // HAVE_PTHREAD_CANCEL } } void wxThread::Exit(ExitCode status) { wxASSERT_MSG( This() == this, - _T("wxThread::Exit() can only be called in the " - "context of the same thread") ); + _T("wxThread::Exit() can only be called in the context of the same thread") ); if ( m_isDetached ) { @@ -1497,6 +1486,13 @@ void wxThread::Exit(ExitCode status) // we make it a global object, but this would mean that we can // only call one thread function at a time :-( DeleteThread(this); + pthread_setspecific(gs_keySelf, 0); + } + else + { + m_critsect.Enter(); + m_internal->SetState(STATE_EXITED); + m_critsect.Leave(); } // terminate the thread (pthread_exit() never returns) @@ -1509,14 +1505,13 @@ void wxThread::Exit(ExitCode status) bool wxThread::TestDestroy() { wxASSERT_MSG( This() == this, - _T("wxThread::TestDestroy() can only be called in the " - "context of the same thread") ); + _T("wxThread::TestDestroy() can only be called in the context of the same thread") ); m_critsect.Enter(); if ( m_internal->GetState() == STATE_PAUSED ) { - m_internal->SetReallyPaused(TRUE); + m_internal->SetReallyPaused(true); // leave the crit section or the other threads will stop too if they // try to call any of (seemingly harmless) IsXXX() functions while we @@ -1543,8 +1538,8 @@ wxThread::~wxThread() 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."), GetId()); + wxLogDebug(_T("The thread %ld is being destroyed although it is still running! The application may crash."), + (long)GetId()); } m_critsect.Leave(); @@ -1575,10 +1570,10 @@ bool wxThread::IsAlive() const { case STATE_RUNNING: case STATE_PAUSED: - return TRUE; + return true; default: - return FALSE; + return false; } } @@ -1610,24 +1605,20 @@ bool wxThreadModule::OnInit() int rc = pthread_key_create(&gs_keySelf, NULL /* dtor function */); if ( rc != 0 ) { - wxLogSysError(rc, _("Thread module initialization failed: " - "failed to create thread key")); + wxLogSysError(rc, _("Thread module initialization failed: failed to create thread key")); - return FALSE; + return false; } gs_tidMain = pthread_self(); -#if wxUSE_GUI gs_mutexGui = new wxMutex(); - gs_mutexGui->Lock(); -#endif // wxUSE_GUI gs_mutexDeleteThread = new wxMutex(); gs_condAllDeleted = new wxCondition( *gs_mutexDeleteThread ); - return TRUE; + return true; } void wxThreadModule::OnExit() @@ -1667,12 +1658,9 @@ void wxThreadModule::OnExit() gs_allThreads[0]->Delete(); } -#if wxUSE_GUI // destroy GUI mutex gs_mutexGui->Unlock(); - delete gs_mutexGui; -#endif // wxUSE_GUI // and free TLD slot (void)pthread_key_delete(gs_keySelf); @@ -1721,16 +1709,12 @@ static void DeleteThread(wxThread *This) void wxMutexGuiEnter() { -#if wxUSE_GUI gs_mutexGui->Lock(); -#endif // wxUSE_GUI } void wxMutexGuiLeave() { -#if wxUSE_GUI gs_mutexGui->Unlock(); -#endif // wxUSE_GUI } // ---------------------------------------------------------------------------- @@ -1740,4 +1724,3 @@ void wxMutexGuiLeave() #include "wx/thrimpl.cpp" #endif // wxUSE_THREADS -