/////////////////////////////////////////////////////////////////////////////
// Name: thread.cpp
-// Purpose: wxThread Implementation. For Unix ports, see e.g. src/gtk
+// Purpose: wxThread Implementation for Posix threads
// Author: Original from Wolfram Gloger/Guilhem Lavaux
-// Modified by:
+// Modified by: Robert Roebling
// Created: 04/22/98
// RCS-ID: $Id$
// Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998)
#pragma implementation "thread.h"
#endif
+#include "wx/defs.h"
+
+#if wxUSE_THREADS
+
#include "wx/module.h"
#include "wx/thread.h"
#include "wx/utils.h"
+#include "wx/log.h"
+
+#include <stdio.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <errno.h>
+
+#include <stdio.h>
+#include <unistd.h>
+
+// for select()
+#include <sys/time.h>
+#include <sys/types.h>
+#ifdef __sgi
+#include <bstring.h>
+#endif
+
+//--------------------------------------------------------------------
+// constants
+//--------------------------------------------------------------------
-enum thread_state {
+enum thread_state
+{
STATE_IDLE = 0,
STATE_RUNNING,
+ STATE_PAUSING,
+ STATE_PAUSED,
STATE_CANCELED,
STATE_EXITED
};
-/////////////////////////////////////////////////////////////////////////////
-// Static variables
-/////////////////////////////////////////////////////////////////////////////
+//--------------------------------------------------------------------
+// global data
+//--------------------------------------------------------------------
-wxMutex *wxMainMutex; // controls access to all GUI functions
+static pthread_t p_mainid;
-/////////////////////////////////////////////////////////////////////////////
-// Windows implementation
-/////////////////////////////////////////////////////////////////////////////
+wxMutex *wxMainMutex = (wxMutex*) NULL; /* controls access to all GUI functions */
+
+/* TODO for Xt */
+
+static int p_thrd_pipe[2] = { -1, -1 };
+
+//-------------------------------------------------------------------------
+// global functions
+//-------------------------------------------------------------------------
+
+static void wxThreadGuiInit()
+{
+/* TODO for Xt */
+}
+
+static void wxThreadGuiExit()
+{
+/* TODO for Xt */
+}
+
+void wxMutexGuiEnter()
+{
+ if (wxMainMutex)
+ wxMainMutex->Lock();
+}
-class wxMutexInternal {
+void wxMutexGuiLeave()
+{
+ if (wxMainMutex)
+ wxMainMutex->Unlock();
+}
+
+//--------------------------------------------------------------------
+// wxMutex (Posix implementation)
+//--------------------------------------------------------------------
+
+class wxMutexInternal
+{
public:
- // TODO: internal mutex handle
+ pthread_mutex_t p_mutex;
};
wxMutex::wxMutex()
{
p_internal = new wxMutexInternal;
- // TODO: create internal mutext handle
+ pthread_mutex_init(&(p_internal->p_mutex), NULL);
m_locked = 0;
}
wxMutex::~wxMutex()
{
if (m_locked > 0)
- wxDebugMsg("wxMutex warning: freeing a locked mutex (%d locks)\n", m_locked);
- // TODO: free internal mutext handle
+ 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()
{
- // TODO
+ int err;
+
+ err = pthread_mutex_lock(&(p_internal->p_mutex));
+ if (err == EDEADLK)
+ return wxMUTEX_DEAD_LOCK;
+
m_locked++;
- return MUTEX_NO_ERROR;
+ return wxMUTEX_NO_ERROR;
}
wxMutexError wxMutex::TryLock()
{
- // TODO
+ int err;
+
+ if (m_locked)
+ return wxMUTEX_BUSY;
+
+ err = pthread_mutex_trylock(&(p_internal->p_mutex));
+ switch (err)
+ {
+ case EBUSY: return wxMUTEX_BUSY;
+ }
m_locked++;
- return MUTEX_NO_ERROR;
+ return wxMUTEX_NO_ERROR;
}
wxMutexError wxMutex::Unlock()
{
if (m_locked > 0)
m_locked--;
-
- // TODO
- return MUTEX_NO_ERROR;
+ else
+ return wxMUTEX_UNLOCKED;
+
+ pthread_mutex_unlock(&(p_internal->p_mutex));
+ return wxMUTEX_NO_ERROR;
}
-class wxConditionInternal {
+//--------------------------------------------------------------------
+// wxCondition (Posix implementation)
+//--------------------------------------------------------------------
+
+class wxConditionInternal
+{
public:
- // TODO: internal handle
- int waiters;
+ pthread_cond_t p_condition;
};
wxCondition::wxCondition()
{
p_internal = new wxConditionInternal;
- // TODO: create internal handle
- p_internal->waiters = 0;
+ pthread_cond_init(&(p_internal->p_condition), NULL);
}
wxCondition::~wxCondition()
{
- // TODO: destroy internal handle
+ pthread_cond_destroy(&(p_internal->p_condition));
+ delete p_internal;
}
void wxCondition::Wait(wxMutex& mutex)
{
- mutex.Unlock();
- p_internal->waiters++;
- // TODO wait here
- p_internal->waiters--;
- mutex.Lock();
+ pthread_cond_wait(&(p_internal->p_condition), &(mutex.p_internal->p_mutex));
}
-bool wxCondition::Wait(wxMutex& mutex, unsigned long sec,
- unsigned long nsec)
+bool wxCondition::Wait(wxMutex& mutex, unsigned long sec, unsigned long nsec)
{
- mutex.Unlock();
- p_internal->waiters++;
-
- // TODO wait here
- p_internal->waiters--;
- mutex.Lock();
+ struct timespec tspec;
- return FALSE;
+ 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);
}
void wxCondition::Signal()
{
- // TODO
+ pthread_cond_signal(&(p_internal->p_condition));
}
void wxCondition::Broadcast()
{
- // TODO
+ pthread_cond_broadcast(&(p_internal->p_condition));
}
-class wxThreadInternal {
+//--------------------------------------------------------------------
+// wxThread (Posix implementation)
+//--------------------------------------------------------------------
+
+class wxThreadInternal
+{
public:
- // TODO
+ wxThreadInternal() { state = STATE_IDLE; }
+ ~wxThreadInternal() {}
+ static void *PthreadStart(void *ptr);
+ pthread_t thread_id;
+ int state;
+ int prio;
+ int defer_destroy;
};
-wxThreadError wxThread::Create()
+void *wxThreadInternal::PthreadStart(void *ptr)
{
- // TODO
- return THREAD_NO_ERROR;
-}
+ wxThread *thread = (wxThread *)ptr;
-wxThreadError wxThread::Destroy()
-{
- // TODO
- return THREAD_NO_ERROR;
+ // Call the main entry
+ pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
+ void* status = thread->Entry();
+
+ thread->Exit(status);
+
+ return NULL;
}
-wxThreadError wxThread::Pause()
+wxThreadError wxThread::Create()
{
- // TODO
- return THREAD_NO_ERROR;
+ pthread_attr_t a;
+ int min_prio, max_prio, p;
+ struct sched_param sp;
+
+ if (p_internal->state != STATE_IDLE)
+ return wxTHREAD_RUNNING;
+
+ // 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);
+
+ 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_destroy(&a);
+ return wxTHREAD_NO_RESOURCE;
+ }
+ pthread_attr_destroy(&a);
+
+ return wxTHREAD_NO_ERROR;
}
-wxThreadError wxThread::Resume()
+void wxThread::SetPriority(int prio)
{
- // TODO
- return THREAD_NO_ERROR;
+ if (p_internal->state == STATE_RUNNING)
+ return;
+
+ if (prio > 100) prio = 100;
+
+ if (prio < 0) prio = 0;
+
+ p_internal->prio = prio;
}
-void wxThread::Exit(void *status)
+int wxThread::GetPriority() const
{
- // TODO
+ return p_internal->prio;
}
-void wxThread::SetPriority(int prio)
+void wxThread::DeferDestroy(bool on)
{
- // TODO
+ if (on)
+ pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL);
+ else
+ pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
}
-int wxThread::GetPriority() const
+wxThreadError wxThread::Destroy()
{
- // TODO
- return 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;
}
-void wxThread::DeferDestroy(bool on)
+wxThreadError wxThread::Pause()
{
- // TODO
+ 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;
}
-void wxThread::TestDestroy()
+wxThreadError wxThread::Resume()
{
- // TODO
+ if (p_internal->state == STATE_PAUSING || p_internal->state == STATE_PAUSED)
+ p_internal->state = STATE_RUNNING;
+
+ return wxTHREAD_NO_ERROR;
}
void *wxThread::Join()
{
- // TODO
- return (void*) NULL;
+ void* status = 0;
+
+ if (p_internal->state != STATE_IDLE)
+ {
+ bool do_unlock = wxThread::IsMain();
+
+ while (p_internal->state == STATE_RUNNING)
+ wxYield();
+
+ if (do_unlock) wxMainMutex->Unlock();
+
+ pthread_join(p_internal->thread_id, &status);
+
+ if (do_unlock) wxMainMutex->Lock();
+
+ p_internal->state = STATE_IDLE;
+ }
+
+ return status;
}
unsigned long wxThread::GetID() const
{
- // TODO
- return 0;
+ return p_internal->thread_id;
}
-wxThread *wxThread::GetThreadFromID(unsigned long id)
+void wxThread::Exit(void *status)
{
- // TODO
- return NULL;
+ wxThread* ptr = this;
+
+/* THREAD_SEND_EXIT_MSG(ptr); TODO for Xt */
+
+ p_internal->state = STATE_EXITED;
+ pthread_exit(status);
}
-bool wxThread::IsAlive() const
+void wxThread::TestDestroy()
+{
+ if (p_internal->state == STATE_PAUSING)
+ {
+ p_internal->state = STATE_PAUSED;
+ while (p_internal->state == STATE_PAUSED)
+ {
+ pthread_testcancel();
+ usleep(1);
+ }
+ }
+ pthread_testcancel();
+}
+
+bool wxThread::IsMain()
{
- // TODO
- return FALSE;
+ return (bool)pthread_equal(pthread_self(), p_mainid);
}
bool wxThread::IsRunning() const
{
- // TODO
- return FALSE;
+ return (p_internal->state == STATE_RUNNING);
}
-bool wxThread::IsMain()
+bool wxThread::IsAlive() const
{
- // TODO
- return FALSE;
+ return (p_internal->state == STATE_RUNNING) ||
+ (p_internal->state == STATE_PAUSING) ||
+ (p_internal->state == STATE_PAUSED);
}
wxThread::wxThread()
{
p_internal = new wxThreadInternal();
-
- // TODO
}
wxThread::~wxThread()
Join();
}
-// Automatic initialization
-class wxThreadModule : public wxModule {
- DECLARE_DYNAMIC_CLASS(wxThreadModule)
+//--------------------------------------------------------------------
+// wxThreadModule
+//--------------------------------------------------------------------
+
+class wxThreadModule : public wxModule
+{
public:
- virtual bool OnInit() {
- /* TODO p_mainid = GetCurrentThread(); */
+ 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 = pthread_self();
wxMainMutex->Lock();
+
return TRUE;
- }
+}
- // Global cleanup
- virtual void OnExit() {
+void wxThreadModule::OnExit()
+{
wxMainMutex->Unlock();
+ wxThreadGuiExit();
delete wxMainMutex;
- }
};
-IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
-
+#endif
+ // wxUSE_THREADS
projects / wxWidgets.git / blobdiff