// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#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/intl.h"
#include "wx/dynarray.h"
#include "wx/timer.h"
+#include "wx/stopwatch.h"
#include <stdio.h>
#include <unistd.h>
// 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
// ----------------------------------------------------------------------------
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;
// 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
friend class wxConditionInternal;
};
+#ifdef HAVE_PTHREAD_MUTEXATTR_T
+// 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);
+#endif
+
wxMutexInternal::wxMutexInternal(wxMutexType mutexType)
{
int err;
m_isOk = err == 0;
if ( !m_isOk )
{
- wxLogApiError("pthread_mutex_init()", err);
+ wxLogApiError( wxT("pthread_mutex_init()"), err);
}
}
int err = pthread_mutex_destroy(&m_mutex);
if ( err != 0 )
{
- wxLogApiError("pthread_mutex_destroy()", err);
+ wxLogApiError( wxT("pthread_mutex_destroy()"), err);
}
}
}
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 = %u",
- wxThread::GetCurrentId(), m_count);
+ _T("Thread %ld finished waiting for semaphore, count = %lu"),
+ wxThread::GetCurrentId(), (unsigned long)m_count);
}
m_count--;
return wxSEMA_TIMEOUT;
}
- if ( m_cond.Wait(remainingTime) != wxCOND_NO_ERROR )
- return wxSEMA_MISC_ERROR;
+ switch ( m_cond.WaitTimeout(remainingTime) )
+ {
+ case wxCOND_TIMEOUT:
+ return wxSEMA_TIMEOUT;
+
+ default:
+ return wxSEMA_MISC_ERROR;
+
+ case wxCOND_NO_ERROR:
+ ;
+ }
}
m_count--;
m_count++;
wxLogTrace(TRACE_SEMA,
- "Thread %ld about to signal semaphore, count = %u",
- wxThread::GetCurrentId(), m_count);
-
+ _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
: wxSEMA_MISC_ERROR;
}
};
wxLogTrace(TRACE_THREADS, _T("Thread %ld: %s => %s."),
- GetId(), stateNames[m_state], stateNames[state]);
+ (long)GetId(), stateNames[m_state], stateNames[state]);
#endif // __WXDEBUG__
m_state = state;
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;
{
wxThreadInternal *pthread = thread->m_internal;
- wxLogTrace(TRACE_THREADS, _T("Thread %ld started."), pthread->GetId());
+ 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
if ( !dontRunAtAll )
{
// call the main entry
- wxLogTrace(TRACE_THREADS, _T("Thread %ld about to enter its Entry()."),
- pthread->GetId());
+ 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."),
- pthread->GetId(), (unsigned long)pthread->m_exitcode);
+ wxLogTrace(TRACE_THREADS,
+ _T("Thread %ld Entry() returned %lu."),
+ THR_ID(pthread), (unsigned long)pthread->m_exitcode);
{
wxCriticalSectionLocker lock(thread->m_critsect);
wxMutexGuiLeave();
wxLogTrace(TRACE_THREADS,
- _T("Starting to wait for thread %ld to exit."), GetId());
+ _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
// we're cancelled inside pthread_join(), things will almost
// certainly break - but if we disable the cancellation, we
// might deadlock
- if ( pthread_join((pthread_t)GetId(), &m_exitcode) != 0 )
+ if ( pthread_join(GetId(), &m_exitcode) != 0 )
{
// this is a serious problem, so use wxLogError and not
// 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;
wxCHECK_RET( m_state == STATE_PAUSED,
wxT("thread must first be paused with wxThread::Pause().") );
- wxLogTrace(TRACE_THREADS, _T("Thread %ld goes to sleep."), GetId());
+ wxLogTrace(TRACE_THREADS,
+ _T("Thread %ld goes to sleep."), THR_ID(this));
// wait until the semaphore is Post()ed from Resume()
m_semSuspend.Wait();
// TestDestroy() since the last call to Pause() for example
if ( IsReallyPaused() )
{
- wxLogTrace(TRACE_THREADS, _T("Waking up thread %ld"), GetId());
+ wxLogTrace(TRACE_THREADS,
+ _T("Waking up thread %ld"), THR_ID(this));
// wake up Pause()
m_semSuspend.Post();
}
else
{
- wxLogTrace(TRACE_THREADS, _T("Thread %ld is not yet really paused"),
- GetId());
+ wxLogTrace(TRACE_THREADS,
+ _T("Thread %ld is not yet really paused"), THR_ID(this));
}
SetState(STATE_RUNNING);
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()
void wxThread::Sleep(unsigned long milliseconds)
{
- wxUsleep(milliseconds);
+ wxMilliSleep(milliseconds);
}
int wxThread::GetCPUCount()
wxString s;
if ( file.ReadAll(&s) )
{
- // (ab)use Replace() to find the number of "processor" strings
- size_t count = s.Replace(_T("processor"), _T(""));
+ // (ab)use Replace() to find the number of "processor: num" strings
+ size_t count = s.Replace(_T("processor\t:"), _T(""));
if ( count > 0 )
{
return count;
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
case STATE_RUNNING:
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;
+
+ if (setpriority(PRIO_PROCESS, 0, iPrio) == -1)
+ {
+ wxLogError(_("Failed to set thread priority %d."), prio);
+ }
+ }
+#else // __LINUX__
{
struct sched_param sparam;
sparam.sched_priority = prio;
wxLogError(_("Failed to set thread priority %d."), prio);
}
}
+#endif // __LINUX__
#endif // HAVE_THREAD_PRIORITY_FUNCTIONS
break;
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 )
{
// only call one thread function at a time :-(
DeleteThread(this);
}
+ else
+ {
+ m_critsect.Enter();
+ m_internal->SetState(STATE_EXITED);
+ m_critsect.Leave();
+ }
// terminate the thread (pthread_exit() never returns)
pthread_exit(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_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."), GetId());
}
m_critsect.Leave();
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;
}
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 );
if ( nThreadsBeingDeleted > 0 )
{
- wxLogTrace(TRACE_THREADS, _T("Waiting for %u threads to disappear"),
- nThreadsBeingDeleted);
+ wxLogTrace(TRACE_THREADS,
+ _T("Waiting for %lu threads to disappear"),
+ (unsigned long)nThreadsBeingDeleted);
// have to wait until all of them disappear
gs_condAllDeleted->Wait();
size_t count = gs_allThreads.GetCount();
if ( count != 0u )
{
- wxLogDebug(wxT("%u threads were not terminated by the application."),
- count);
+ wxLogDebug(wxT("%lu threads were not terminated by the application."),
+ (unsigned long)count);
}
for ( size_t n = 0u; n < count; n++ )
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);
gs_nThreadsBeingDeleted++;
- wxLogTrace(TRACE_THREADS, _T("%u thread%s waiting to be deleted"),
- gs_nThreadsBeingDeleted,
+ wxLogTrace(TRACE_THREADS, _T("%lu thread%s waiting to be deleted"),
+ (unsigned long)gs_nThreadsBeingDeleted,
gs_nThreadsBeingDeleted == 1 ? "" : "s");
}
wxCHECK_RET( gs_nThreadsBeingDeleted > 0,
_T("no threads scheduled for deletion, yet we delete one?") );
- wxLogTrace(TRACE_THREADS, _T("%u scheduled for deletion threads left."),
- gs_nThreadsBeingDeleted - 1);
+ wxLogTrace(TRACE_THREADS, _T("%lu scheduled for deletion threads left."),
+ (unsigned long)gs_nThreadsBeingDeleted - 1);
if ( !--gs_nThreadsBeingDeleted )
{
void wxMutexGuiEnter()
{
-#if wxUSE_GUI
gs_mutexGui->Lock();
-#endif // wxUSE_GUI
}
void wxMutexGuiLeave()
{
-#if wxUSE_GUI
gs_mutexGui->Unlock();
-#endif // wxUSE_GUI
}
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff