// Author: Original from Wolfram Gloger/Guilhem Lavaux
// Modified by: K. S. Sreeram (2002): POSIXified wxCondition, added wxSemaphore
// Created: 04/22/98
-// RCS-ID: $Id$
// Copyright: (c) Wolfram Gloger (1996, 1997)
// Guilhem Lavaux (1998)
// Vadim Zeitlin (1999-2002)
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
// 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; }
bool WasCancelled() const { return m_cancelled; }
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::wxThreadInternal()
{
m_state = STATE_NEW;
+ m_created = false;
m_cancelled = false;
m_prio = wxPRIORITY_DEFAULT;
m_threadId = 0;
{
}
+#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,
m_isDetached = kind == wxTHREAD_DETACHED;
}
-#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))
+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_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 = 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 != 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 ( m_isDetached )
- {
- if ( pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0 )
- {
- wxFAIL_MSG(wxT("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(wxT("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();
}
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