// Modified by:
// Created: 04/22/98
// RCS-ID: $Id$
-// Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998)
+// Copyright: (c) Wolfram Gloger (1996, 1997)
+// Guilhem Lavaux (1998)
+// Robert Roebling (1999)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+
#ifdef __GNUG__
#pragma implementation "thread.h"
#endif
#include <stdio.h>
#include <unistd.h>
-#include <sched.h>
#include <pthread.h>
+#include <errno.h>
+#include "wx/thread.h"
+#include "wx/module.h"
+#include "wx/utils.h"
+#include "wx/log.h"
+
+#include "gdk/gdk.h"
+#include "gtk/gtk.h"
-enum thread_state {
+enum thread_state
+{
STATE_IDLE = 0,
STATE_RUNNING,
+ STATE_PAUSING,
+ STATE_PAUSED,
STATE_CANCELED,
STATE_EXITED
};
-/////////////////////////////////////////////////////////////////////////////
-// Static variables
-/////////////////////////////////////////////////////////////////////////////
-
-#include "thread.h"
+//--------------------------------------------------------------------
+// global data
+//--------------------------------------------------------------------
static pthread_t p_mainid;
-wxMutex wxMainMutex; // controls access to all GUI functions
-/////////////////////////////////////////////////////////////////////////////
-// GUI thread manager
-/////////////////////////////////////////////////////////////////////////////
+wxMutex *wxMainMutex; /* controls access to all GUI functions */
+
+//--------------------------------------------------------------------
+// common GUI thread code
+//--------------------------------------------------------------------
+
#include "threadgui.inc"
-/////////////////////////////////////////////////////////////////////////////
-// wxThread: Posix Thread implementation (Mutex)
-/////////////////////////////////////////////////////////////////////////////
+//--------------------------------------------------------------------
+// wxMutex (Posix implementation)
+//--------------------------------------------------------------------
-class wxMutexInternal {
+class wxMutexInternal
+{
public:
pthread_mutex_t p_mutex;
};
wxMutex::wxMutex()
{
- p_internal = new wxMutexInternal;
- pthread_mutex_init(&(p_internal->p_mutex), NULL);
- m_locked = false;
+ p_internal = new wxMutexInternal;
+ pthread_mutex_init( &(p_internal->p_mutex), (const pthread_mutexattr_t*) NULL );
+ m_locked = 0;
}
wxMutex::~wxMutex()
{
- if (m_locked)
- pthread_mutex_unlock(&(p_internal->p_mutex));
- pthread_mutex_destroy(&(p_internal->p_mutex));
- delete p_internal;
+ if (m_locked > 0)
+ wxLogDebug( "wxMutex warning: freeing a locked mutex (%d locks)\n", m_locked );
+
+ pthread_mutex_destroy( &(p_internal->p_mutex) );
+ delete p_internal;
}
wxMutexError wxMutex::Lock()
{
- int err;
-
- err = pthread_mutex_lock(&(p_internal->p_mutex));
- switch (err) {
- case EDEADLK: return MUTEX_DEAD_LOCK;
- }
- m_locked++;
- return MUTEX_NO_ERROR;
+ int err = pthread_mutex_lock( &(p_internal->p_mutex) );
+ if (err == EDEADLK)
+ {
+ return wxMUTEX_DEAD_LOCK;
+ }
+
+ m_locked++;
+
+ return wxMUTEX_NO_ERROR;
}
wxMutexError wxMutex::TryLock()
{
- int err;
-
- if (m_locked)
- return MUTEX_BUSY;
- err = pthread_mutex_trylock(&(p_internal->p_mutex));
- switch (err) {
- case EBUSY: return MUTEX_BUSY;
- }
- m_locked++;
- return MUTEX_NO_ERROR;
+ if (m_locked)
+ {
+ return wxMUTEX_BUSY;
+ }
+
+ int err = pthread_mutex_trylock( &(p_internal->p_mutex) );
+ switch (err)
+ {
+ case EBUSY: return wxMUTEX_BUSY;
+ }
+
+ m_locked++;
+
+ return wxMUTEX_NO_ERROR;
}
wxMutexError wxMutex::Unlock()
{
- if (m_locked > 0) m_locked--;
- pthread_mutex_unlock(&(p_internal->p_mutex));
- return MUTEX_NO_ERROR;
+ if (m_locked > 0)
+ {
+ m_locked--;
+ }
+ else
+ {
+ return wxMUTEX_UNLOCKED;
+ }
+
+ pthread_mutex_unlock( &(p_internal->p_mutex) );
+
+ return wxMUTEX_NO_ERROR;
}
-/////////////////////////////////////////////////////////////////////////////
-// wxThread: Posix Thread implementation (Condition)
-/////////////////////////////////////////////////////////////////////////////
+//--------------------------------------------------------------------
+// wxCondition (Posix implementation)
+//--------------------------------------------------------------------
-class wxConditionInternal {
+class wxConditionInternal
+{
public:
pthread_cond_t p_condition;
};
wxCondition::wxCondition()
{
- p_internal = new wxConditionInternal;
- pthread_cond_init(&(p_internal->p_condition), NULL);
+ p_internal = new wxConditionInternal;
+ pthread_cond_init( &(p_internal->p_condition), (const pthread_condattr_t *) NULL );
}
wxCondition::~wxCondition()
{
- pthread_cond_destroy(&(p_internal->p_condition));
- delete p_internal;
+ pthread_cond_destroy( &(p_internal->p_condition) );
+
+ delete p_internal;
}
void wxCondition::Wait(wxMutex& mutex)
{
- pthread_cond_wait(&(p_internal->p_condition), &(mutex.p_internal->p_mutex));
+ pthread_cond_wait( &(p_internal->p_condition), &(mutex.p_internal->p_mutex) );
}
bool wxCondition::Wait(wxMutex& mutex, unsigned long sec, unsigned long nsec)
{
- struct timespec tspec;
+ struct timespec tspec;
- tspec.tv_sec = time(NULL)+sec;
- tspec.tv_nsec = nsec;
- return (pthread_cond_timedwait(&(p_internal->p_condition), &(mutex.p_internal->p_mutex), &tspec) != ETIMEDOUT);
+ tspec.tv_sec = time(0L)+sec;
+ tspec.tv_nsec = nsec;
+ return (pthread_cond_timedwait(&(p_internal->p_condition), &(mutex.p_internal->p_mutex), &tspec) != ETIMEDOUT);
}
void wxCondition::Signal()
{
- pthread_cond_signal(&(p_internal->p_condition));
+ pthread_cond_signal( &(p_internal->p_condition) );
}
void wxCondition::Broadcast()
{
- pthread_cond_broadcast(&(p_internal->p_condition));
+ pthread_cond_broadcast( &(p_internal->p_condition) );
}
-/////////////////////////////////////////////////////////////////////////////
-// wxThread: Posix Thread implementation (Thread)
-/////////////////////////////////////////////////////////////////////////////
+//--------------------------------------------------------------------
+// wxThread (Posix implementation)
+//--------------------------------------------------------------------
-class wxThreadInternal {
+class wxThreadInternal
+{
public:
wxThreadInternal() { state = STATE_IDLE; }
~wxThreadInternal() {}
pthread_t thread_id;
int state;
int prio;
+ int defer_destroy;
};
void *wxThreadInternal::PthreadStart(void *ptr)
{
- wxThread *thread = (wxThread *)ptr;
+ wxThread *thread = (wxThread *)ptr;
- pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
- void* status = thread->Entry();
- thread->Exit(status);
+ /* Call the main entry */
+ pthread_setcanceltype( PTHREAD_CANCEL_ASYNCHRONOUS, (int*) NULL );
+ void* status = thread->Entry();
- return NULL;
+ thread->Exit(status);
+
+ return NULL;
}
wxThreadError wxThread::Create()
{
- pthread_attr_t a;
- int min_prio, max_prio, p;
- struct sched_param sp;
+ pthread_attr_t a;
+ int min_prio, max_prio, p;
+ struct sched_param sp;
- if (p_internal->state != STATE_IDLE)
- return THREAD_RUNNING;
+ if (p_internal->state != STATE_IDLE)
+ return wxTHREAD_RUNNING;
- // Change thread priority
- pthread_attr_init(&a);
- pthread_attr_getschedpolicy(&a, &p);
+ /* Change thread priority */
+ pthread_attr_init(&a);
+ pthread_attr_getschedpolicy(&a, &p);
- min_prio = sched_get_priority_min(p);
- max_prio = sched_get_priority_max(p);
+ min_prio = sched_get_priority_min(p);
+ max_prio = sched_get_priority_max(p);
- pthread_attr_getschedparam(&a, &sp);
- sp.sched_priority = min_prio +
+ pthread_attr_getschedparam(&a, &sp);
+ sp.sched_priority = min_prio +
(p_internal->prio*(max_prio-min_prio))/100;
- pthread_attr_setschedparam(&a, &sp);
-
- // this is the point of no return
- p_internal->state = STATE_RUNNING;
- if (pthread_create(&p_internal->thread_id, &a,
- wxThreadInternal::PthreadStart, (void *)this) != 0) {
- p_internal->state = STATE_IDLE;
+ pthread_attr_setschedparam(&a, &sp);
+
+ // this is the point of no return
+ p_internal->state = STATE_RUNNING;
+ if (pthread_create(&p_internal->thread_id, &a,
+ wxThreadInternal::PthreadStart, (void *)this) != 0)
+ {
+ p_internal->state = STATE_IDLE;
+ pthread_attr_destroy(&a);
+ return wxTHREAD_NO_RESOURCE;
+ }
pthread_attr_destroy(&a);
- return THREAD_NO_RESOURCE;
- }
- pthread_attr_destroy(&a);
- return THREAD_NO_ERROR;
+
+ return wxTHREAD_NO_ERROR;
}
void wxThread::SetPriority(int prio)
{
- if (p_internal->state == STATE_RUNNING)
- return;
-
- if (prio > 100)
- prio = 100;
- if (prio < 0)
- prio = 0;
- p_internal->prio = prio;
+ if (p_internal->state == STATE_RUNNING)
+ return;
+
+ if (prio > 100) prio = 100;
+
+ if (prio < 0) prio = 0;
+
+ p_internal->prio = prio;
}
int wxThread::GetPriority() const
{
- return p_internal->prio;
+ return p_internal->prio;
}
void wxThread::DeferDestroy(bool on)
{
- if (on)
- pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
- else
- pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
+ if (on)
+ pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, (int*) NULL);
+ else
+ pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, (int*) NULL);
}
wxThreadError wxThread::Destroy()
{
- int res = 0;
+ int res = 0;
+
+ if (p_internal->state == STATE_RUNNING)
+ {
+ res = pthread_cancel(p_internal->thread_id);
+ if (res == 0)
+ p_internal->state = STATE_CANCELED;
+ }
+
+ return wxTHREAD_NO_ERROR;
+}
+
+wxThreadError wxThread::Pause()
+{
+ if (p_internal->state != STATE_RUNNING)
+ return wxTHREAD_NOT_RUNNING;
+
+ if (!p_internal->defer_destroy)
+ return wxTHREAD_MISC_ERROR;
+
+ p_internal->state = STATE_PAUSING;
+ return wxTHREAD_NO_ERROR;
+}
+
+wxThreadError wxThread::Resume()
+{
+ if (p_internal->state == STATE_PAUSING || p_internal->state == STATE_PAUSED)
+ p_internal->state = STATE_RUNNING;
- if (p_internal->state == STATE_RUNNING) {
- res = pthread_cancel(p_internal->thread_id);
- if (res == 0)
- p_internal->state = STATE_CANCELED;
- }
- return THREAD_NO_ERROR;
+ return wxTHREAD_NO_ERROR;
}
void *wxThread::Join()
{
- void* status = 0;
+ void* status = 0;
+
+ if (p_internal->state != STATE_IDLE)
+ {
+ bool do_unlock = wxThread::IsMain();
- if (p_internal->state != STATE_IDLE) {
- bool do_unlock = wxThread::IsMain();
+ while (p_internal->state == STATE_RUNNING)
+ wxYield();
- while (p_internal->state == STATE_RUNNING)
- wxYield();
+ if (do_unlock) wxMainMutex->Unlock();
+
+ pthread_join(p_internal->thread_id, &status);
+
+ if (do_unlock) wxMainMutex->Lock();
- if (do_unlock)
- wxMainMutex.Unlock();
- pthread_join(p_internal->thread_id, &status);
- if (do_unlock)
- wxMainMutex.Lock();
- p_internal->state = STATE_IDLE;
- }
- return status;
+ p_internal->state = STATE_IDLE;
+ }
+
+ return status;
}
unsigned long wxThread::GetID() const
{
- return (unsigned long)p_internal->thread_id;
+ return p_internal->thread_id;
}
void wxThread::Exit(void *status)
{
- wxThread* ptr = this;
+ wxThread* ptr = this;
- THREAD_SEND_EXIT_MSG(ptr);
- p_internal->state = STATE_EXITED;
- pthread_exit(status);
+ THREAD_SEND_EXIT_MSG(ptr);
+ p_internal->state = STATE_EXITED;
+ pthread_exit(status);
}
-void wxThread::TestDestroy()
+bool wxThread::TestDestroy()
{
- pthread_testcancel();
+ if (p_internal->state == STATE_PAUSING)
+ {
+ p_internal->state = STATE_PAUSED;
+ while (p_internal->state == STATE_PAUSED)
+ {
+ pthread_testcancel();
+ usleep(1);
+ }
+ }
+
+ // VZ: do I understand it correctly that it will terminate the thread all by
+ // itself if it was cancelled?
+ pthread_testcancel();
+
+ return FALSE;
}
-bool wxThread::IsMain() const
+bool wxThread::IsMain()
{
- return (bool)pthread_equal(pthread_self(), p_mainid);
+ return (bool)pthread_equal(pthread_self(), p_mainid);
+}
+
+bool wxThread::IsRunning() const
+{
+ return (p_internal->state == STATE_RUNNING);
+}
+
+bool wxThread::IsAlive() const
+{
+ return (p_internal->state == STATE_RUNNING) ||
+ (p_internal->state == STATE_PAUSING) ||
+ (p_internal->state == STATE_PAUSED);
}
wxThread::wxThread()
{
- p_internal = new wxThreadInternal();
+ p_internal = new wxThreadInternal();
}
wxThread::~wxThread()
{
- Destroy();
- Join();
- delete p_internal;
+ Destroy();
+ Join();
+ delete p_internal;
}
-// The default callback just joins the thread and throws away the result.
+/* The default callback just joins the thread and throws away the result. */
void wxThread::OnExit()
{
+ Join();
}
-// Automatic initialization
-class wxThreadModule : public wxModule {
- DECLARE_DYNAMIC_CLASS(wxThreadModule)
+//--------------------------------------------------------------------
+// wxThreadModule
+//--------------------------------------------------------------------
+
+class wxThreadModule : public wxModule
+{
public:
- virtual bool OnInit() {
- wxThreadGuiInit();
- p_mainid = pthread_self();
- wxMainMutex.Lock();
+ virtual bool OnInit();
+ virtual void OnExit();
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxThreadModule)
+};
+IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
+
+bool wxThreadModule::OnInit()
+{
+ wxMainMutex = new wxMutex();
+ wxThreadGuiInit();
+ p_mainid = (int)getpid();
+ wxMainMutex->Lock();
return TRUE;
- }
+}
- virtual void OnExit() {
- wxMainMutex.Unlock();
+void wxThreadModule::OnExit()
+{
+ wxMainMutex->Unlock();
wxThreadGuiExit();
- }
-};
+ delete wxMainMutex;
+}
+
-IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
projects / wxWidgets.git / blobdiff