/////////////////////////////////////////////////////////////////////////////
-// 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
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "thread.h"
-#endif
-
// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if wxUSE_THREADS
#include "wx/thread.h"
-#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 "wx/except.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/app.h"
+ #include "wx/dynarray.h"
+ #include "wx/intl.h"
+ #include "wx/log.h"
+ #include "wx/utils.h"
+ #include "wx/timer.h"
+ #include "wx/stopwatch.h"
+ #include "wx/module.h"
+#endif
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <time.h>
+#include <sys/time.h> // needed for at least __QNX__
#ifdef HAVE_SCHED_H
#include <sched.h>
#endif
#include <thread.h>
#endif
+#ifdef HAVE_ABI_FORCEDUNWIND
+ #include <cxxabi.h>
+#endif
+
+#ifdef HAVE_SETPRIORITY
+ #include <sys/resource.h> // for setpriority()
+#endif
+
// we use wxFFile under Linux in GetCPUCount()
#ifdef __LINUX__
#include "wx/ffile.h"
- // For setpriority.
- #include <sys/time.h>
- #include <sys/resource.h>
#endif
-#ifdef __VMS
- #define THR_ID(thr) ((long long)(thr)->GetId())
-#else
- #define THR_ID(thr) ((long)(thr)->GetId())
-#endif
+#define THR_ID_CAST(id) (reinterpret_cast<void*>(id))
+#define THR_ID(thr) THR_ID_CAST((thr)->GetId())
// ----------------------------------------------------------------------------
// constants
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
// ----------------------------------------------------------------------------
// 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
// be left in memory
static wxArrayThread gs_allThreads;
+// a mutex to protect 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;
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;
+#ifndef __WXOSX__
// 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;
+#endif
// 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
~wxMutexInternal();
wxMutexError Lock();
+ wxMutexError Lock(unsigned long ms);
wxMutexError TryLock();
wxMutexError Unlock();
bool IsOk() const { return m_isOk; }
+private:
+ // convert the result of pthread_mutex_[timed]lock() call to wx return code
+ wxMutexError HandleLockResult(int err);
+
private:
pthread_mutex_t m_mutex;
bool m_isOk;
+ wxMutexType m_type;
+ unsigned long m_owningThread;
// wxConditionInternal uses our m_mutex
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);
wxMutexInternal::wxMutexInternal(wxMutexType mutexType)
{
+ m_type = mutexType;
+ m_owningThread = 0;
+
int err;
switch ( mutexType )
{
break;
default:
- wxFAIL_MSG( _T("unknown mutex type") );
+ wxFAIL_MSG( wxT("unknown mutex type") );
// fall through
case wxMUTEX_DEFAULT:
wxMutexError wxMutexInternal::Lock()
{
- int err = pthread_mutex_lock(&m_mutex);
+ if ((m_type == wxMUTEX_DEFAULT) && (m_owningThread != 0))
+ {
+ if (m_owningThread == wxThread::GetCurrentId())
+ return wxMUTEX_DEAD_LOCK;
+ }
+
+ return HandleLockResult(pthread_mutex_lock(&m_mutex));
+}
+
+wxMutexError wxMutexInternal::Lock(unsigned long ms)
+{
+#ifdef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ static const long MSEC_IN_SEC = 1000;
+ static const long NSEC_IN_MSEC = 1000000;
+ static const long NSEC_IN_USEC = 1000;
+ static const long NSEC_IN_SEC = MSEC_IN_SEC * NSEC_IN_MSEC;
+
+ time_t seconds = ms/MSEC_IN_SEC;
+ long nanoseconds = (ms % MSEC_IN_SEC) * NSEC_IN_MSEC;
+ timespec ts = { 0, 0 };
+
+ // normally we should use clock_gettime(CLOCK_REALTIME) here but this
+ // function is in librt and we don't link with it currently, so use
+ // gettimeofday() instead -- if it turns out that this is really too
+ // imprecise, we should modify configure to check if clock_gettime() is
+ // available and whether it requires -lrt and use it instead
+#if 0
+ if ( clock_gettime(CLOCK_REALTIME, &ts) == 0 )
+ {
+ }
+#else
+ struct timeval tv;
+ if ( wxGetTimeOfDay(&tv) != -1 )
+ {
+ ts.tv_sec = tv.tv_sec;
+ ts.tv_nsec = tv.tv_usec*NSEC_IN_USEC;
+ }
+#endif
+ else // fall back on system timer
+ {
+ ts.tv_sec = time(NULL);
+ }
+
+ ts.tv_sec += seconds;
+ ts.tv_nsec += nanoseconds;
+ if ( ts.tv_nsec > NSEC_IN_SEC )
+ {
+ ts.tv_sec += 1;
+ ts.tv_nsec -= NSEC_IN_SEC;
+ }
+
+ return HandleLockResult(pthread_mutex_timedlock(&m_mutex, &ts));
+#else // !HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ wxUnusedVar(ms);
+
+ return wxMUTEX_MISC_ERROR;
+#endif // HAVE_PTHREAD_MUTEX_TIMEDLOCK/!HAVE_PTHREAD_MUTEX_TIMEDLOCK
+}
+
+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_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_lock()"), err);
+ wxLogApiError(wxT("pthread_mutex_[timed]lock()"), err);
}
return wxMUTEX_MISC_ERROR;
}
+
wxMutexError wxMutexInternal::TryLock()
{
int err = pthread_mutex_trylock(&m_mutex);
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;
wxMutexError wxMutexInternal::Unlock()
{
+ m_owningThread = 0;
+
int err = pthread_mutex_unlock(&m_mutex);
switch ( err )
{
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;
if ( !m_isOk )
{
- wxLogApiError(_T("pthread_cond_init()"), err);
+ wxLogApiError(wxT("pthread_cond_init()"), err);
}
}
int err = pthread_cond_destroy(&m_cond);
if ( err != 0 )
{
- wxLogApiError(_T("pthread_cond_destroy()"), err);
+ wxLogApiError(wxT("pthread_cond_destroy()"), err);
}
}
}
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;
}
wxCondError wxConditionInternal::WaitTimeout(unsigned long milliseconds)
{
- wxLongLong curtime = wxGetLocalTimeMillis();
+ wxLongLong curtime = wxGetUTCTimeMillis();
curtime += milliseconds;
wxLongLong temp = curtime / 1000;
int sec = temp.GetLo();
return wxCOND_NO_ERROR;
default:
- wxLogApiError(_T("pthread_cond_timedwait()"), err);
+ wxLogApiError(wxT("pthread_cond_timedwait()"), err);
}
return wxCOND_MISC_ERROR;
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;
}
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;
}
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;
+ m_isOk = false;
}
else
{
while ( m_count == 0 )
{
wxLogTrace(TRACE_SEMA,
- _T("Thread %ld waiting for semaphore to become signalled"),
- wxThread::GetCurrentId());
+ wxT("Thread %p waiting for semaphore to become signalled"),
+ THR_ID_CAST(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"),
- wxThread::GetCurrentId(), (unsigned long)m_count);
+ wxT("Thread %p finished waiting for semaphore, count = %lu"),
+ THR_ID_CAST(wxThread::GetCurrentId()), (unsigned long)m_count);
}
m_count--;
m_count++;
wxLogTrace(TRACE_SEMA,
- _T("Thread %ld about to signal semaphore, count = %lu"),
- wxThread::GetCurrentId(), (unsigned long)m_count);
+ wxT("Thread %p about to signal semaphore, count = %lu"),
+ THR_ID_CAST(wxThread::GetCurrentId()), (unsigned long)m_count);
return m_cond.Signal() == wxCOND_NO_ERROR ? wxSEMA_NO_ERROR
: wxSEMA_MISC_ERROR;
static void *PthreadStart(wxThread *thread);
// thread actions
+ // create the thread
+ wxThreadError Create(wxThread *thread, unsigned int stackSize);
// start the thread
wxThreadError Run();
// unblock the thread allowing it to run
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."),
+ THR_ID(this), stateNames[m_state], stateNames[state]);
+#endif // wxUSE_LOG_TRACE
m_state = state;
}
// id
pthread_t GetId() const { return m_threadId; }
pthread_t *GetIdPtr() { return &m_threadId; }
+ // "created" flag
+ bool WasCreated() const { return m_created; }
// "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; }
{
wxCriticalSectionLocker lock(m_csJoinFlag);
- m_shouldBeJoined = FALSE;
- m_isDetached = TRUE;
+ m_shouldBeJoined = false;
+ m_isDetached = true;
}
#ifdef wxHAVE_PTHREAD_CLEANUP
wxThreadState m_state; // see wxThreadState enum
int m_prio; // in wxWidgets units: from 0 to 100
+ // this flag is set when the thread was successfully created
+ bool m_created;
+
// this flag is set when the thread should terminate
bool m_cancelled;
{
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
int rc = pthread_setspecific(gs_keySelf, thread);
if ( rc != 0 )
{
- wxLogSysError(rc, _("Cannot start thread: error writing TLS"));
+ wxLogSysError(rc, _("Cannot start thread: error writing TLS."));
return (void *)-1;
}
{
// 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));
- pthread->m_exitcode = thread->Entry();
+ wxTRY
+ {
+ pthread->m_exitcode = thread->Entry();
- wxLogTrace(TRACE_THREADS,
- _T("Thread %ld Entry() returned %lu."),
- THR_ID(pthread), (unsigned long)pthread->m_exitcode);
+ wxLogTrace(TRACE_THREADS,
+ wxT("Thread %p Entry() returned %lu."),
+ THR_ID(pthread), wxPtrToUInt(pthread->m_exitcode));
+ }
+#ifdef HAVE_ABI_FORCEDUNWIND
+ // When using common C++ ABI under Linux we must always rethrow this
+ // special exception used to unwind the stack when the thread was
+ // cancelled, otherwise the thread library would simply terminate the
+ // program, see http://udrepper.livejournal.com/21541.html
+ catch ( abi::__forced_unwind& )
+ {
+ wxCriticalSectionLocker lock(thread->m_critsect);
+ pthread->SetState(STATE_EXITED);
+ throw;
+ }
+#endif // HAVE_ABI_FORCEDUNWIND
+ wxCATCH_ALL( wxTheApp->OnUnhandledException(); )
{
wxCriticalSectionLocker lock(thread->m_critsect);
}
}
- // 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!
+ // 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);
+
+ #ifdef __DECCXX
+ #pragma message restore
+ #endif
#endif // wxHAVE_PTHREAD_CLEANUP
if ( dontRunAtAll )
void wxThreadInternal::Cleanup(wxThread *thread)
{
+ if (pthread_getspecific(gs_keySelf) == 0) return;
{
wxCriticalSectionLocker lock(thread->m_critsect);
if ( thread->m_internal->GetState() == STATE_EXITED )
wxThreadInternal::wxThreadInternal()
{
m_state = STATE_NEW;
- m_cancelled = FALSE;
- m_prio = WXTHREAD_DEFAULT_PRIORITY;
+ m_created = false;
+ m_cancelled = false;
+ m_prio = wxPRIORITY_DEFAULT;
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()
{
}
+#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
+ #define WXUNUSED_STACKSIZE(identifier) identifier
+#else
+ #define WXUNUSED_STACKSIZE(identifier) WXUNUSED(identifier)
+#endif
+
+wxThreadError wxThreadInternal::Create(wxThread *thread,
+ unsigned int WXUNUSED_STACKSIZE(stackSize))
+{
+ if ( GetState() != STATE_NEW )
+ {
+ // don't recreate thread
+ return wxTHREAD_RUNNING;
+ }
+
+ // set up the thread attribute: right now, we only set thread priority
+ 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 )
+ {
+ wxLogError(_("Cannot retrieve thread scheduling policy."));
+ }
+
+#ifdef __VMS__
+ /* the pthread.h contains too many spaces. This is a work-around */
+# undef sched_get_priority_max
+#undef sched_get_priority_min
+#define sched_get_priority_max(_pol_) \
+ (_pol_ == SCHED_OTHER ? PRI_FG_MAX_NP : PRI_FIFO_MAX)
+#define sched_get_priority_min(_pol_) \
+ (_pol_ == SCHED_OTHER ? PRI_FG_MIN_NP : PRI_FIFO_MIN)
+#endif
+
+ int max_prio = sched_get_priority_max(policy),
+ min_prio = sched_get_priority_min(policy),
+ prio = GetPriority();
+
+ if ( min_prio == -1 || max_prio == -1 )
+ {
+ wxLogError(_("Cannot get priority range for scheduling policy %d."),
+ policy);
+ }
+ else if ( max_prio == min_prio )
+ {
+ if ( prio != wxPRIORITY_DEFAULT )
+ {
+ // notify the programmer that this doesn't work here
+ wxLogWarning(_("Thread priority setting is ignored."));
+ }
+ //else: we have default priority, so don't complain
+
+ // anyhow, don't do anything because priority is just ignored
+ }
+ else
+ {
+ struct sched_param sp;
+ if ( pthread_attr_getschedparam(&attr, &sp) != 0 )
+ {
+ 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(wxT("pthread_attr_setschedparam(priority) failed"));
+ }
+ }
+#endif // HAVE_THREAD_PRIORITY_FUNCTIONS
+
+#ifdef HAVE_PTHREAD_ATTR_SETSCOPE
+ // this will make the threads created by this process really concurrent
+ if ( pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) != 0 )
+ {
+ wxFAIL_MSG(wxT("pthread_attr_setscope(PTHREAD_SCOPE_SYSTEM) failed"));
+ }
+#endif // HAVE_PTHREAD_ATTR_SETSCOPE
+
+ // VZ: assume that this one is always available (it's rather fundamental),
+ // if this function is ever missing we should try to use
+ // pthread_detach() instead (after thread creation)
+ if ( thread->IsDetached() )
+ {
+ if ( pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0 )
+ {
+ wxFAIL_MSG(wxT("pthread_attr_setdetachstate(DETACHED) failed"));
+ }
+
+ // never try to join detached threads
+ Detach();
+ }
+ //else: threads are created joinable by default, it's ok
+
+ // create the new OS thread object
+ int rc = pthread_create
+ (
+ GetIdPtr(),
+ &attr,
+ wxPthreadStart,
+ (void *)thread
+ );
+
+ if ( pthread_attr_destroy(&attr) != 0 )
+ {
+ wxFAIL_MSG(wxT("pthread_attr_destroy() failed"));
+ }
+
+ if ( rc != 0 )
+ {
+ SetState(STATE_EXITED);
+
+ return wxTHREAD_NO_RESOURCE;
+ }
+
+ m_created = true;
+ return wxTHREAD_NO_ERROR;
+}
+
wxThreadError wxThreadInternal::Run()
{
wxCHECK_MSG( GetState() == STATE_NEW, wxTHREAD_RUNNING,
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
if ( wxThread::IsMain() )
+ {
+#ifdef __WXOSX__
+ // give the thread we're waiting for chance to do the GUI call
+ // it might be in, we don't do this conditionally as the to be waited on
+ // thread might have to acquire the mutex later but before terminating
+ if ( wxGuiOwnedByMainThread() )
+ wxMutexGuiLeave();
+#else
wxMutexGuiLeave();
+#endif
+ }
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
wxLogError(_("Failed to join a thread, potential memory leak detected - please restart the program"));
}
- m_shouldBeJoined = FALSE;
+ m_shouldBeJoined = false;
}
}
+#ifndef __WXOSX__
// reacquire GUI mutex
if ( wxThread::IsMain() )
wxMutexGuiEnter();
+#endif
}
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();
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();
// reset the flag
- SetReallyPaused(FALSE);
+ SetReallyPaused(false);
}
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);
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
#endif
}
-void wxThread::Sleep(unsigned long milliseconds)
-{
- wxMilliSleep(milliseconds);
-}
-
int wxThread::GetCPUCount()
{
-#if defined(__LINUX__) && wxUSE_FFILE
+#if defined(_SC_NPROCESSORS_ONLN)
+ // this works for Solaris and Linux 2.6
+ int rc = sysconf(_SC_NPROCESSORS_ONLN);
+ if ( rc != -1 )
+ {
+ return rc;
+ }
+#elif defined(__LINUX__) && wxUSE_FFILE
// read from proc (can't use wxTextFile here because it's a special file:
// 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
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"));
}
}
-#elif defined(_SC_NPROCESSORS_ONLN)
- // this works for Solaris
- int rc = sysconf(_SC_NPROCESSORS_ONLN);
- if ( rc != -1 )
- {
- return rc;
- }
#endif // different ways to get number of CPUs
// unknown
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)
{
-#ifdef HAVE_THR_SETCONCURRENCY
+#ifdef HAVE_PTHREAD_SET_CONCURRENCY
+ int rc = pthread_setconcurrency( level );
+#elif defined(HAVE_THR_SETCONCURRENCY)
int rc = thr_setconcurrency(level);
+#else // !HAVE_THR_SETCONCURRENCY
+ // ok only for the default value
+ int rc = level == 0 ? 0 : -1;
+#endif // HAVE_THR_SETCONCURRENCY/!HAVE_THR_SETCONCURRENCY
+
if ( rc != 0 )
{
- wxLogSysError(rc, _T("thr_setconcurrency() failed"));
+ wxLogSysError(rc, _("Failed to set thread concurrency level to %lu"),
+ static_cast<unsigned long>(level));
+ return false;
}
- return rc == 0;
-#else // !HAVE_THR_SETCONCURRENCY
- // ok only for the default value
- return level == 0;
-#endif // HAVE_THR_SETCONCURRENCY/!HAVE_THR_SETCONCURRENCY
+ return true;
}
// -----------------------------------------------------------------------------
wxThread::wxThread(wxThreadKind kind)
{
// add this thread to the global list of all threads
- gs_allThreads.Add(this);
+ {
+ wxMutexLocker lock(*gs_mutexAllThreads);
+
+ gs_allThreads.Add(this);
+ }
m_internal = new wxThreadInternal();
m_isDetached = kind == wxTHREAD_DETACHED;
}
-wxThreadError wxThread::Create(unsigned int WXUNUSED(stackSize))
+wxThreadError wxThread::Create(unsigned int stackSize)
{
- if ( m_internal->GetState() != STATE_NEW )
- {
- // don't recreate thread
- return wxTHREAD_RUNNING;
- }
-
- // set up the thread attribute: right now, we only set thread priority
- pthread_attr_t attr;
- pthread_attr_init(&attr);
-
-#ifdef HAVE_THREAD_PRIORITY_FUNCTIONS
- int policy;
- if ( pthread_attr_getschedpolicy(&attr, &policy) != 0 )
- {
- wxLogError(_("Cannot retrieve thread scheduling policy."));
- }
-
-#ifdef __VMS__
- /* the pthread.h contains too many spaces. This is a work-around */
-# undef sched_get_priority_max
-#undef sched_get_priority_min
-#define sched_get_priority_max(_pol_) \
- (_pol_ == SCHED_OTHER ? PRI_FG_MAX_NP : PRI_FIFO_MAX)
-#define sched_get_priority_min(_pol_) \
- (_pol_ == SCHED_OTHER ? PRI_FG_MIN_NP : PRI_FIFO_MIN)
-#endif
-
- int max_prio = sched_get_priority_max(policy),
- min_prio = sched_get_priority_min(policy),
- prio = m_internal->GetPriority();
-
- if ( min_prio == -1 || max_prio == -1 )
- {
- wxLogError(_("Cannot get priority range for scheduling policy %d."),
- policy);
- }
- else if ( max_prio == min_prio )
- {
- if ( prio != WXTHREAD_DEFAULT_PRIORITY )
- {
- // notify the programmer that this doesn't work here
- wxLogWarning(_("Thread priority setting is ignored."));
- }
- //else: we have default priority, so don't complain
-
- // anyhow, don't do anything because priority is just ignored
- }
- else
- {
- struct sched_param sp;
- if ( pthread_attr_getschedparam(&attr, &sp) != 0 )
- {
- wxFAIL_MSG(_T("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"));
- }
- }
-#endif // HAVE_THREAD_PRIORITY_FUNCTIONS
-
-#ifdef HAVE_PTHREAD_ATTR_SETSCOPE
- // 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"));
- }
-#endif // HAVE_PTHREAD_ATTR_SETSCOPE
-
- // VZ: assume that this one is always available (it's rather fundamental),
- // if this function is ever missing we should try to use
- // pthread_detach() instead (after thread creation)
- if ( m_isDetached )
- {
- if ( pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0 )
- {
- wxFAIL_MSG(_T("pthread_attr_setdetachstate(DETACHED) failed"));
- }
-
- // never try to join detached threads
- m_internal->Detach();
- }
- //else: threads are created joinable by default, it's ok
-
- // create the new OS thread object
- int rc = pthread_create
- (
- m_internal->GetIdPtr(),
- &attr,
- wxPthreadStart,
- (void *)this
- );
-
- if ( pthread_attr_destroy(&attr) != 0 )
- {
- wxFAIL_MSG(_T("pthread_attr_destroy() failed"));
- }
-
- if ( rc != 0 )
- {
- m_internal->SetState(STATE_EXITED);
-
- return wxTHREAD_NO_RESOURCE;
- }
+ wxCriticalSectionLocker lock(m_critsect);
- return wxTHREAD_NO_ERROR;
+ return m_internal->Create(this, stackSize);
}
wxThreadError wxThread::Run()
{
wxCriticalSectionLocker lock(m_critsect);
- wxCHECK_MSG( m_internal->GetId(), wxTHREAD_MISC_ERROR,
- wxT("must call wxThread::Create() first") );
+ // Create the thread if it wasn't created yet with an explicit
+ // Create() call:
+ if ( !m_internal->WasCreated() )
+ {
+ wxThreadError rv = m_internal->Create(this, 0);
+ if ( rv != wxTHREAD_NO_ERROR )
+ return rv;
+ }
return m_internal->Run();
}
void wxThread::SetPriority(unsigned int prio)
{
- wxCHECK_RET( ((int)WXTHREAD_MIN_PRIORITY <= (int)prio) &&
- ((int)prio <= (int)WXTHREAD_MAX_PRIORITY),
+ wxCHECK_RET( wxPRIORITY_MIN <= prio && prio <= wxPRIORITY_MAX,
wxT("invalid thread priority") );
wxCriticalSectionLocker lock(m_critsect);
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 0..100 to Unix priorities 20..-20
+ if ( setpriority(PRIO_PROCESS, 0, -(2*(int)prio)/5 + 20) == -1 )
+ {
+ wxLogError(_("Failed to set thread priority %d."), prio);
}
#else // __LINUX__
{
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);
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);
switch ( state )
{
case STATE_PAUSED:
- wxLogTrace(TRACE_THREADS, _T("Thread %ld suspended, resuming."),
- GetId());
+ wxLogTrace(TRACE_THREADS, wxT("Thread %p suspended, resuming."),
+ THR_ID(this));
m_internal->Resume();
return wxTHREAD_NO_ERROR;
case STATE_EXITED:
- wxLogTrace(TRACE_THREADS, _T("Thread %ld exited, won't resume."),
- GetId());
+ wxLogTrace(TRACE_THREADS, wxT("Thread %p exited, won't resume."),
+ THR_ID(this));
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;
}
// exiting thread
// -----------------------------------------------------------------------------
-wxThread::ExitCode wxThread::Wait()
+wxThread::ExitCode wxThread::Wait(wxThreadWait WXUNUSED(waitMode))
{
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();
return m_internal->GetExitCode();
}
-wxThreadError wxThread::Delete(ExitCode *rc)
+wxThreadError wxThread::Delete(ExitCode *rc, wxThreadWait WXUNUSED(waitMode))
{
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;
m_critsect.Leave();
+ OnDelete();
+
switch ( state )
{
case STATE_NEW:
//else: can't wait for detached threads
}
+ if (state == STATE_NEW)
+ return wxTHREAD_MISC_ERROR;
+ // for coherency with the MSW implementation, signal the user that
+ // Delete() was called on a thread which didn't start to run yet.
+
return wxTHREAD_NO_ERROR;
}
wxThreadError wxThread::Kill()
{
wxCHECK_MSG( This() != this, wxTHREAD_MISC_ERROR,
- _T("a thread can't kill itself") );
+ wxT("a thread can't kill itself") );
+
+ OnKill();
switch ( m_internal->GetState() )
{
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
}
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") );
+ wxT("wxThread::Exit() can only be called in the context of the same thread") );
if ( m_isDetached )
{
// might deadlock if, for example, it signals a condition in OnExit() (a
// common case) while the main thread calls any of functions entering
// m_critsect on us (almost all of them do)
- OnExit();
+ wxTRY
+ {
+ OnExit();
+ }
+ wxCATCH_ALL( wxTheApp->OnUnhandledException(); )
// delete C++ thread object if this is a detached thread - user is
// responsible for doing this for joinable ones
// 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
{
// 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();
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
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."), GetId());
+ wxLogDebug(wxT("The thread %p is being destroyed although it is still running! The application may crash."),
+ THR_ID(this));
}
m_critsect.Leave();
-#endif // __WXDEBUG__
delete m_internal;
// remove this thread from the global array
- gs_allThreads.Remove(this);
+ {
+ wxMutexLocker lock(*gs_mutexAllThreads);
+
+ gs_allThreads.Remove(this);
+ }
}
// -----------------------------------------------------------------------------
{
case STATE_RUNNING:
case STATE_PAUSED:
- return TRUE;
+ return true;
default:
- return FALSE;
+ return false;
}
}
// wxThreadModule
//--------------------------------------------------------------------
+#ifdef __WXOSX__
+void wxOSXThreadModuleOnInit();
+void wxOSXThreadModuleOnExit();
+#endif
+
class wxThreadModule : public wxModule
{
public:
{
wxLogSysError(rc, _("Thread module initialization failed: failed to create thread key"));
- return FALSE;
+ return false;
}
- gs_tidMain = pthread_self();
+ wxThread::ms_idMainThread = wxThread::GetCurrentId();
+
+ gs_mutexAllThreads = new wxMutex();
+#ifdef __WXOSX__
+ wxOSXThreadModuleOnInit();
+#else
gs_mutexGui = new wxMutex();
gs_mutexGui->Lock();
+#endif
gs_mutexDeleteThread = new wxMutex();
- gs_condAllDeleted = new wxCondition( *gs_mutexDeleteThread );
+ gs_condAllDeleted = new wxCondition(*gs_mutexDeleteThread);
- return TRUE;
+ return true;
}
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
}
}
- // terminate any threads left
- size_t count = gs_allThreads.GetCount();
- if ( count != 0u )
+ size_t count;
+
{
- wxLogDebug(wxT("%lu threads were not terminated by the application."),
- (unsigned long)count);
- }
+ wxMutexLocker lock(*gs_mutexAllThreads);
+
+ // terminate any threads left
+ count = gs_allThreads.GetCount();
+ if ( count != 0u )
+ {
+ wxLogDebug(wxT("%lu threads were not terminated by the application."),
+ (unsigned long)count);
+ }
+ } // unlock mutex before deleting the threads as they lock it in their dtor
for ( size_t n = 0u; n < count; n++ )
{
gs_allThreads[0]->Delete();
}
+ delete gs_mutexAllThreads;
+
+#ifdef __WXOSX__
+ wxOSXThreadModuleOnExit();
+#else
// destroy GUI mutex
gs_mutexGui->Unlock();
delete gs_mutexGui;
+#endif
// and free TLD slot
(void)pthread_key_delete(gs_keySelf);
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 ? "" : "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."), THR_ID(This));
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 )
}
}
-void wxMutexGuiEnter()
+#ifndef __DARWIN__
+
+void wxMutexGuiEnterImpl()
{
gs_mutexGui->Lock();
}
-void wxMutexGuiLeave()
+void wxMutexGuiLeaveImpl()
{
gs_mutexGui->Unlock();
}
+#endif
+
// ----------------------------------------------------------------------------
// include common implementation code
// ----------------------------------------------------------------------------
#include "wx/thrimpl.cpp"
#endif // wxUSE_THREADS
-
projects / wxWidgets.git / blobdiff