/////////////////////////////////////////////////////////////////////////////
// Name: thread.cpp
// Purpose: wxThread Implementation
-// Author: Original from Wolfram Gloger/Guilhem Lavaux
-// Modified by: Vadim Zeitlin to make it work :-)
+// Author: Original from Wolfram Gloger/Guilhem Lavaux/Vadim Zeitlin
+// Modified by: Stefan Csomor
// Created: 04/22/98
// RCS-ID: $Id$
// Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998),
-// Vadim Zeitlin (1999)
+// Vadim Zeitlin (1999) , Stefan Csomor (2000)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#if wxUSE_THREADS
-#include <stdio.h>
-
-#include <windows.h>
-
#include "wx/module.h"
#include "wx/thread.h"
+#ifdef __WXMAC__
+#include <Threads.h>
+#include "wx/mac/uma.h"
+#endif
+
+#define INFINITE 0xFFFFFFFF
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
// the possible states of the thread ("=>" shows all possible transitions from
// this state)
enum wxThreadState
};
// ----------------------------------------------------------------------------
-// static variables
+// this module globals
// ----------------------------------------------------------------------------
-// if it's FALSE, some secondary thread is holding the GUI lock
-static bool s_bGuiOwnedByMainThread = TRUE;
-
-// critical section which controls access to all GUI functions: any secondary
-// thread (i.e. except the main one) must enter this crit section before doing
-// any GUI calls
-static wxCriticalSection *s_critsectGui = NULL;
-
-// critical section which protects s_nWaitingForGui variable
-static wxCriticalSection *s_critsectWaitingForGui = NULL;
-
-// number of threads waiting for GUI in wxMutexGuiEnter()
-static size_t s_nWaitingForGui = 0;
-
-// are we waiting for a thread termination?
-static bool s_waitingForThread = FALSE;
+static ThreadID gs_idMainThread = kNoThreadID ;
+static bool gs_waitingForThread = FALSE ;
// ============================================================================
-// Windows implementation of thread classes
+// MacOS implementation of thread classes
// ============================================================================
+class wxMacStCritical
+{
+public :
+ wxMacStCritical()
+ {
+ if ( UMASystemIsInitialized() )
+ ThreadBeginCritical() ;
+ }
+ ~wxMacStCritical()
+ {
+ if ( UMASystemIsInitialized() )
+ ThreadEndCritical() ;
+ }
+};
+
// ----------------------------------------------------------------------------
// wxMutex implementation
// ----------------------------------------------------------------------------
+
class wxMutexInternal
{
public:
- Handle p_mutex;
-};
+ wxMutexInternal(wxMutexType WXUNUSED(mutexType))
+ {
+ m_owner = kNoThreadID ;
+ m_locked = 0;
+ }
-wxMutex::wxMutex()
-{
- p_internal = new wxMutexInternal;
-// p_internal->p_mutex = CreateMutex(NULL, FALSE, NULL);
- if ( !p_internal->p_mutex )
+ ~wxMutexInternal()
{
- wxLogSysError(_("Can not create mutex."));
+ if ( m_locked > 0 )
+ {
+ wxLogDebug(_T("Warning: freeing a locked mutex (%ld locks)."), m_locked);
+ }
}
- m_locked = 0;
-}
+ bool IsOk() const { return true; }
-wxMutex::~wxMutex()
+ wxMutexError Lock() ;
+ wxMutexError TryLock() ;
+ wxMutexError Unlock();
+public:
+ ThreadID m_owner ;
+ wxArrayLong m_waiters ;
+ long m_locked ;
+};
+
+wxMutexError wxMutexInternal::Lock()
{
- if (m_locked > 0)
- wxLogDebug(wxT("Warning: freeing a locked mutex (%d locks)."), m_locked);
-// CloseHandle(p_internal->p_mutex);
+ wxMacStCritical critical ;
+ if ( UMASystemIsInitialized() )
+ {
+ OSErr err ;
+ ThreadID current = kNoThreadID;
+ err = ::MacGetCurrentThread(¤t);
+ // if we are not the owner, add this thread to the list of waiting threads, stop this thread
+ // and invoke the scheduler to continue executing the owner's thread
+ while ( m_owner != kNoThreadID && m_owner != current)
+ {
+ m_waiters.Add(current);
+ err = ::SetThreadStateEndCritical(kCurrentThreadID, kStoppedThreadState, m_owner);
+ err = ::ThreadBeginCritical();
+ }
+ m_owner = current;
+ }
+ m_locked++;
+
+ return wxMUTEX_NO_ERROR;
}
-wxMutexError wxMutex::Lock()
+wxMutexError wxMutexInternal::TryLock()
{
-/*
- DWORD ret;
-
- ret = WaitForSingleObject(p_internal->p_mutex, INFINITE);
- switch ( ret )
+ wxMacStCritical critical ;
+ if ( UMASystemIsInitialized() )
{
- case WAIT_ABANDONED:
+ ThreadID current = kNoThreadID;
+ ::MacGetCurrentThread(¤t);
+ // if we are not the owner, give an error back
+ if ( m_owner != kNoThreadID && m_owner != current )
return wxMUTEX_BUSY;
- case WAIT_OBJECT_0:
- // ok
- break;
-
- case WAIT_FAILED:
- wxLogSysError(_("Couldn't acquire a mutex lock"));
- return wxMUTEX_MISC_ERROR;
-
- case WAIT_TIMEOUT:
- default:
- wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));
+ m_owner = current;
}
-*/
m_locked++;
- return wxMUTEX_NO_ERROR;
+
+ return wxMUTEX_NO_ERROR;
}
-wxMutexError wxMutex::TryLock()
+wxMutexError wxMutexInternal::Unlock()
{
-/*
- DWORD ret;
+ if ( UMASystemIsInitialized() )
+ {
+ OSErr err;
+ err = ::ThreadBeginCritical();
- ret = WaitForSingleObject(p_internal->p_mutex, 0);
- if (ret == WAIT_TIMEOUT || ret == WAIT_ABANDONED)
- return wxMUTEX_BUSY;
+ if (m_locked > 0)
+ m_locked--;
- m_locked++;
-*/
- return wxMUTEX_NO_ERROR;
-}
+ // this mutex is not owned by anybody anmore
+ m_owner = kNoThreadID;
-wxMutexError wxMutex::Unlock()
-{
- if (m_locked > 0)
- m_locked--;
-/*
- BOOL ret = ReleaseMutex(p_internal->p_mutex);
- if ( ret == 0 )
+ // now pass on to the first waiting thread
+ ThreadID firstWaiting = kNoThreadID;
+ bool found = false;
+ while (!m_waiters.IsEmpty() && !found)
+ {
+ firstWaiting = m_waiters[0];
+ err = ::SetThreadState(firstWaiting, kReadyThreadState, kNoThreadID);
+ // in case this was not successful (dead thread), we just loop on and reset the id
+ found = (err != threadNotFoundErr);
+ if ( !found )
+ firstWaiting = kNoThreadID ;
+ m_waiters.RemoveAt(0) ;
+ }
+ // now we have a valid firstWaiting thread, which has been scheduled to run next, just end the
+ // critical section and invoke the scheduler
+ err = ::SetThreadStateEndCritical(kCurrentThreadID, kReadyThreadState, firstWaiting);
+ }
+ else
{
- wxLogSysError(_("Couldn't release a mutex"));
- return wxMUTEX_MISC_ERROR;
+ if (m_locked > 0)
+ m_locked--;
}
-*/
return wxMUTEX_NO_ERROR;
}
-// ----------------------------------------------------------------------------
-// wxCondition implementation
-// ----------------------------------------------------------------------------
+// --------------------------------------------------------------------------
+// wxSemaphore
+// --------------------------------------------------------------------------
-class wxConditionInternal
+// TODO not yet implemented
+
+class wxSemaphoreInternal
{
public:
- Handle event;
- int waiters;
+ wxSemaphoreInternal(int initialcount, int maxcount);
+ ~wxSemaphoreInternal();
+
+ bool IsOk() const { return true ; }
+
+ wxSemaError Wait() { return WaitTimeout(INFINITE); }
+ wxSemaError TryWait() { return WaitTimeout(0); }
+ wxSemaError WaitTimeout(unsigned long milliseconds);
+
+ wxSemaError Post();
+
+private:
};
-wxCondition::wxCondition()
+wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)
{
- p_internal = new wxConditionInternal;
-// p_internal->event = CreateEvent(NULL, FALSE, FALSE, NULL);
- if ( !p_internal->event )
+ if ( maxcount == 0 )
{
- wxLogSysError(_("Can not create event object."));
+ // make it practically infinite
+ maxcount = INT_MAX;
}
-
- p_internal->waiters = 0;
}
-wxCondition::~wxCondition()
+wxSemaphoreInternal::~wxSemaphoreInternal()
{
-// CloseHandle(p_internal->event);
}
-void wxCondition::Wait(wxMutex& mutex)
+wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
{
- mutex.Unlock();
- p_internal->waiters++;
-// WaitForSingleObject(p_internal->event, INFINITE);
- p_internal->waiters--;
- mutex.Lock();
+ return wxSEMA_MISC_ERROR;
}
-bool wxCondition::Wait(wxMutex& mutex,
- unsigned long sec,
- unsigned long nsec)
+wxSemaError wxSemaphoreInternal::Post()
{
-// DWORD ret;
-
- mutex.Unlock();
- p_internal->waiters++;
- // ret = WaitForSingleObject(p_internal->event, (sec*1000)+(nsec/1000000));
- p_internal->waiters--;
- mutex.Lock();
-
- return TRUE; // false for timeout
+ return wxSEMA_MISC_ERROR;
}
-void wxCondition::Signal()
-{
-// SetEvent(p_internal->event);
-}
+// ----------------------------------------------------------------------------
+// wxCondition implementation
+// ----------------------------------------------------------------------------
-void wxCondition::Broadcast()
+// TODO this is not yet completed
+
+class wxConditionInternal
{
- int i;
+public:
+ wxConditionInternal(wxMutex& mutex) : m_mutex(mutex)
+ {
+ m_excessSignals = 0 ;
+ }
+ ~wxConditionInternal()
+ {
+ }
- for (i=0;i<p_internal->waiters;i++)
+ bool IsOk() const { return m_mutex.IsOk() ; }
+
+ wxCondError Wait()
+ {
+ return WaitTimeout(0xFFFFFFFF );
+ }
+
+ wxCondError WaitTimeout(unsigned long msectimeout)
{
-// if ( SetEvent(p_internal->event) == 0 )
+ wxMacStCritical critical ;
+ if ( m_excessSignals > 0 )
{
- wxLogSysError(_("Couldn't change the state of event object."));
+ --m_excessSignals ;
+ return wxCOND_NO_ERROR ;
}
- }
-}
+ else if ( msectimeout == 0 )
+ {
+ return wxCOND_MISC_ERROR ;
+ }
+ else
+ {
+ }
+ /*
+ waiters++;
-// ----------------------------------------------------------------------------
-// wxCriticalSection implementation
-// ----------------------------------------------------------------------------
+ // FIXME this should be MsgWaitForMultipleObjects() as well probably
+ DWORD rc = ::WaitForSingleObject(event, timeout);
-class wxCriticalSectionInternal
-{
-public:
- // init the critical section object
- wxCriticalSectionInternal()
- { /* ::InitializeCriticalSection(&m_data);*/ }
+ waiters--;
- // implicit cast to the associated data
- operator Handle *() { return &m_data; }
+ return rc != WAIT_TIMEOUT;
+ */
+ return wxCOND_NO_ERROR ;
+ }
+ wxCondError Signal()
+ {
+ wxMacStCritical critical ;
+ return wxCOND_NO_ERROR;
+ }
- // free the associated ressources
- ~wxCriticalSectionInternal()
- { /* ::DeleteCriticalSection(&m_data); */}
+ wxCondError Broadcast()
+ {
+ wxMacStCritical critical ;
+ return wxCOND_NO_ERROR;
+ }
-private:
- Handle m_data;
+ wxArrayLong m_waiters ;
+ wxInt32 m_excessSignals ;
+ wxMutex& m_mutex;
};
-wxCriticalSection::wxCriticalSection()
-{
- m_critsect = new wxCriticalSectionInternal;
-}
-
-wxCriticalSection::~wxCriticalSection()
-{
- delete m_critsect;
-}
-
-void wxCriticalSection::Enter()
-{
-// ::EnterCriticalSection(*m_critsect);
-}
+// ----------------------------------------------------------------------------
+// wxCriticalSection implementation
+// ----------------------------------------------------------------------------
-void wxCriticalSection::Leave()
-{
-// ::LeaveCriticalSection(*m_critsect);
-}
+// it's implemented as a mutex on mac os, so it is defined in the headers
// ----------------------------------------------------------------------------
// wxThread implementation
// wxThreadInternal class
// ----------------------
-/*
class wxThreadInternal
{
public:
wxThreadInternal()
{
- m_hThread = 0;
+ m_tid = kNoThreadID ;
m_state = STATE_NEW;
m_priority = WXTHREAD_DEFAULT_PRIORITY;
}
+ ~wxThreadInternal()
+ {
+ }
+
+ void Free()
+ {
+ }
+
// create a new (suspended) thread (for the given thread object)
- bool Create(wxThread *thread);
+ bool Create(wxThread *thread, unsigned int stackSize);
// suspend/resume/terminate
bool Suspend();
wxThreadState GetState() const { return m_state; }
// thread priority
- void SetPriority(unsigned int priority) { m_priority = priority; }
+ void SetPriority(unsigned int priority);
unsigned int GetPriority() const { return m_priority; }
+ void SetResult( void *res ) { m_result = res ; }
+ void *GetResult() { return m_result ; }
+
// thread handle and id
- HANDLE GetHandle() const { return m_hThread; }
- DWORD GetId() const { return m_tid; }
+ ThreadID GetId() const { return m_tid; }
// thread function
- static DWORD WinThreadStart(wxThread *thread);
+ static pascal void* MacThreadStart(wxThread* arg);
private:
- Handle m_hThread; // handle of the thread
- wxThreadState m_state; // state, see wxThreadState enum
- unsigned int m_priority; // thread priority in "wx" units
- ThreadId m_tid; // thread id
+ wxThreadState m_state; // state, see wxThreadState enum
+ unsigned int m_priority; // thread priority in "wx" units
+ ThreadID m_tid; // thread id
+ void* m_result;
+ static ThreadEntryUPP s_threadEntry ;
};
-DWORD wxThreadInternal::WinThreadStart(wxThread *thread)
+static wxArrayPtrVoid s_threads ;
+
+ThreadEntryUPP wxThreadInternal::s_threadEntry = NULL ;
+pascal void* wxThreadInternal::MacThreadStart(wxThread *thread)
{
- // store the thread object in the TLS
- if ( !::TlsSetValue(s_tlsThisThread, thread) )
+ // first of all, check whether we hadn't been cancelled already
+ if ( thread->m_internal->GetState() == STATE_EXITED )
{
- wxLogSysError(_("Can not start thread: error writing TLS."));
-
- return (DWORD)-1;
+ return (void*)-1;
}
- DWORD ret = (DWORD)thread->Entry();
- thread->p_internal->SetState(STATE_EXITED);
+ void* rc = thread->Entry();
+
+ // enter m_critsect before changing the thread state
+ thread->m_critsect.Enter();
+ bool wasCancelled = thread->m_internal->GetState() == STATE_CANCELED;
+ thread->m_internal->SetState(STATE_EXITED);
+ thread->m_critsect.Leave();
+
thread->OnExit();
- delete thread;
+ // if the thread was cancelled (from Delete()), then it the handle is still
+ // needed there
+ if ( thread->IsDetached() && !wasCancelled )
+ {
+ // auto delete
+ delete thread;
+ }
+ //else: the joinable threads handle will be closed when Wait() is done
- return ret;
+ return rc;
}
-
-bool wxThreadInternal::Create(wxThread *thread)
+void wxThreadInternal::SetPriority(unsigned int priority)
{
- m_hThread = ::CreateThread
- (
- NULL, // default security
- 0, // default stack size
- (LPTHREAD_START_ROUTINE) // thread entry point
- wxThreadInternal::WinThreadStart, //
- (LPVOID)thread, // parameter
- CREATE_SUSPENDED, // flags
- &m_tid // [out] thread id
- );
+ // Priorities don't exist on Mac
+}
- if ( m_hThread == NULL )
+bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize)
+{
+ if ( s_threadEntry == NULL )
+ {
+ s_threadEntry = NewThreadEntryUPP( (ThreadEntryProcPtr) MacThreadStart ) ;
+ }
+ OSErr err = NewThread( kCooperativeThread,
+ s_threadEntry,
+ (void*) thread,
+ stackSize,
+ kNewSuspend,
+ &m_result,
+ &m_tid );
+
+ if ( err != noErr )
{
wxLogSysError(_("Can't create thread"));
-
return FALSE;
}
- // translate wxWindows priority to the Windows one
- int win_priority;
- if (m_priority <= 20)
- win_priority = THREAD_PRIORITY_LOWEST;
- else if (m_priority <= 40)
- win_priority = THREAD_PRIORITY_BELOW_NORMAL;
- else if (m_priority <= 60)
- win_priority = THREAD_PRIORITY_NORMAL;
- else if (m_priority <= 80)
- win_priority = THREAD_PRIORITY_ABOVE_NORMAL;
- else if (m_priority <= 100)
- win_priority = THREAD_PRIORITY_HIGHEST;
- else
+ if ( m_priority != WXTHREAD_DEFAULT_PRIORITY )
{
- wxFAIL_MSG(wxT("invalid value of thread priority parameter"));
- win_priority = THREAD_PRIORITY_NORMAL;
+ SetPriority(m_priority);
}
- if ( ::SetThreadPriority(m_hThread, win_priority) == 0 )
- {
- wxLogSysError(_("Can't set thread priority"));
- }
+ m_state = STATE_NEW;
return TRUE;
}
bool wxThreadInternal::Suspend()
{
- DWORD nSuspendCount = ::SuspendThread(m_hThread);
- if ( nSuspendCount == (DWORD)-1 )
- {
- wxLogSysError(_("Can not suspend thread %x"), m_hThread);
+ OSErr err ;
+
+ ::ThreadBeginCritical();
+ if ( m_state != STATE_RUNNING )
+ {
+ ::ThreadEndCritical() ;
+ wxLogSysError(_("Can not suspend thread %x"), m_tid);
return FALSE;
}
m_state = STATE_PAUSED;
+ err = ::SetThreadStateEndCritical(m_tid, kStoppedThreadState, kNoThreadID);
+
return TRUE;
}
bool wxThreadInternal::Resume()
{
- DWORD nSuspendCount = ::ResumeThread(m_hThread);
- if ( nSuspendCount == (DWORD)-1 )
- {
- wxLogSysError(_("Can not resume thread %x"), m_hThread);
+ ThreadID current ;
+ OSErr err ;
+ err = MacGetCurrentThread( ¤t ) ;
+
+ wxASSERT( err == noErr ) ;
+ wxASSERT( current != m_tid ) ;
+ ::ThreadBeginCritical();
+ if ( m_state != STATE_PAUSED && m_state != STATE_NEW )
+ {
+ ::ThreadEndCritical() ;
+ wxLogSysError(_("Can not resume thread %x"), m_tid);
return FALSE;
+
}
+ err = ::SetThreadStateEndCritical(m_tid, kReadyThreadState, kNoThreadID);
+ wxASSERT( err == noErr ) ;
m_state = STATE_RUNNING;
-
+ ::ThreadEndCritical() ;
+ ::YieldToAnyThread() ;
return TRUE;
}
// static functions
// ----------------
-
wxThread *wxThread::This()
{
- wxThread *thread = (wxThread *)::TlsGetValue(s_tlsThisThread);
+ wxMacStCritical critical ;
- // be careful, 0 may be a valid return value as well
- if ( !thread && (::GetLastError() != NO_ERROR) )
- {
- wxLogSysError(_("Couldn't get the current thread pointer"));
+ ThreadID current ;
+ OSErr err ;
- // return NULL...
+ err = MacGetCurrentThread( ¤t ) ;
+
+ for ( size_t i = 0 ; i < s_threads.Count() ; ++i )
+ {
+ if ( ( (wxThread*) s_threads[i] )->GetId() == current )
+ return (wxThread*) s_threads[i] ;
}
- return thread;
+ wxLogSysError(_("Couldn't get the current thread pointer"));
+ return NULL;
}
bool wxThread::IsMain()
{
- return ::GetCurrentThreadId() == s_idMainThread;
+ ThreadID current ;
+ OSErr err ;
+
+ err = MacGetCurrentThread( ¤t ) ;
+ return current == gs_idMainThread;
}
#ifdef Yield
- #undef Yield
+#undef Yield
#endif
void wxThread::Yield()
{
- // 0 argument to Sleep() is special
- ::Sleep(0);
+ ::YieldToAnyThread() ;
}
void wxThread::Sleep(unsigned long milliseconds)
{
- ::Sleep(milliseconds);
+ clock_t start = clock();
+ do
+ {
+ YieldToAnyThread();
+ } while( clock() - start < milliseconds / 1000.0 * CLOCKS_PER_SEC ) ;
+}
+
+int wxThread::GetCPUCount()
+{
+ // we will use whatever MP API will be used for the new MP Macs
+ return 1;
+}
+
+unsigned long wxThread::GetCurrentId()
+{
+ ThreadID current ;
+ MacGetCurrentThread( ¤t ) ;
+ return (unsigned long)current;
+}
+
+bool wxThread::SetConcurrency(size_t level)
+{
+ wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
+
+ // ok only for the default one
+ if ( level == 0 )
+ return 0;
+
+ // how many CPUs have we got?
+ if ( GetCPUCount() == 1 )
+ {
+ // don't bother with all this complicated stuff - on a single
+ // processor system it doesn't make much sense anyhow
+ return level == 1;
+ }
+
+ return TRUE ;
+}
+
+// ctor and dtor
+// -------------
+
+wxThread::wxThread(wxThreadKind kind)
+{
+ m_internal = new wxThreadInternal();
+
+ m_isDetached = kind == wxTHREAD_DETACHED;
+ s_threads.Add( (void*) this ) ;
+}
+
+wxThread::~wxThread()
+{
+ s_threads.Remove( (void*) this ) ;
+ if (m_internal != NULL) {
+ delete m_internal;
+ m_internal = NULL;
+ }
}
// create/start thread
// -------------------
-wxThreadError wxThread::Create()
+wxThreadError wxThread::Create(unsigned int stackSize)
{
- if ( !p_internal->Create(this) )
+ wxCriticalSectionLocker lock(m_critsect);
+
+ if ( !m_internal->Create(this, stackSize) )
return wxTHREAD_NO_RESOURCE;
return wxTHREAD_NO_ERROR;
{
wxCriticalSectionLocker lock(m_critsect);
- if ( p_internal->GetState() != STATE_NEW )
+ if ( m_internal->GetState() != STATE_NEW )
{
// actually, it may be almost any state at all, not only STATE_RUNNING
return wxTHREAD_RUNNING;
}
+ // the thread has just been created and is still suspended - let it run
return Resume();
}
{
wxCriticalSectionLocker lock(m_critsect);
- return p_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+ return m_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
}
wxThreadError wxThread::Resume()
{
wxCriticalSectionLocker lock(m_critsect);
- return p_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+ return m_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
}
// stopping thread
// ---------------
-wxThread::ExitCode wxThread::Delete()
+wxThread::ExitCode wxThread::Wait()
+{
+ // although under MacOS we can wait for any thread, it's an error to
+ // wait for a detached one in wxWin API
+ wxCHECK_MSG( !IsDetached(), (ExitCode)-1,
+ _T("can't wait for detached thread") );
+
+ ExitCode rc = (ExitCode)-1;
+
+ (void)Delete(&rc);
+
+ m_internal->Free();
+
+ return rc;
+}
+
+wxThreadError wxThread::Delete(ExitCode *pRc)
{
ExitCode rc = 0;
// Delete() is always safe to call, so consider all possible states
- if ( IsPaused() )
+
+ // has the thread started to run?
+ bool shouldResume = FALSE;
+
+ {
+ wxCriticalSectionLocker lock(m_critsect);
+
+ if ( m_internal->GetState() == STATE_NEW )
+ {
+ // WinThreadStart() will see it and terminate immediately
+ m_internal->SetState(STATE_EXITED);
+
+ shouldResume = TRUE;
+ }
+ }
+
+ // is the thread paused?
+ if ( shouldResume || IsPaused() )
Resume();
+ // does is still run?
if ( IsRunning() )
{
if ( IsMain() )
{
// set flag for wxIsWaitingForThread()
- s_waitingForThread = TRUE;
+ gs_waitingForThread = TRUE;
+#if wxUSE_GUI
wxBeginBusyCursor();
+#endif // wxUSE_GUI
}
- HANDLE hThread;
+ // ask the thread to terminate
{
wxCriticalSectionLocker lock(m_critsect);
- p_internal->Cancel();
- hThread = p_internal->GetHandle();
+ m_internal->Cancel();
}
- // we can't just wait for the thread to terminate because it might be
- // calling some GUI functions and so it will never terminate before we
- // process the Windows messages that result from these functions
- DWORD result;
- do
+#if wxUSE_GUI
+ // simply wait for the thread to terminate
+ while( TestDestroy() )
{
- result = ::MsgWaitForMultipleObjects
- (
- 1, // number of objects to wait for
- &hThread, // the objects
- FALSE, // don't wait for all objects
- INFINITE, // no timeout
- QS_ALLEVENTS // return as soon as there are any events
- );
-
- switch ( result )
- {
- case 0xFFFFFFFF:
- // error
- wxLogSysError(_("Can not wait for thread termination"));
- Kill();
- return (ExitCode)-1;
-
- case WAIT_OBJECT_0:
- // thread we're waiting for terminated
- break;
-
- case WAIT_OBJECT_0 + 1:
- // new message arrived, process it
- if ( !wxTheApp->DoMessage() )
- {
- // WM_QUIT received: kill the thread
- Kill();
-
- return (ExitCode)-1;
- }
-
- if ( IsMain() )
- {
- // give the thread we're waiting for chance to exit
- // from the GUI call it might have been in
- if ( (s_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
- {
- wxMutexGuiLeave();
- }
- }
-
- break;
-
- default:
- wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));
- }
- } while ( result != WAIT_OBJECT_0 );
-
- if ( IsMain() )
+ ::YieldToAnyThread() ;
+ }
+#else // !wxUSE_GUI
+ // simply wait for the thread to terminate
+ while( TestDestroy() )
{
- s_waitingForThread = FALSE;
-
- wxEndBusyCursor();
+ ::YieldToAnyThread() ;
}
+#endif // wxUSE_GUI/!wxUSE_GUI
- if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
+ if ( IsMain() )
{
- wxLogLastError("GetExitCodeThread");
+ gs_waitingForThread = FALSE;
- rc = (ExitCode)-1;
+#if wxUSE_GUI
+ wxEndBusyCursor();
+#endif // wxUSE_GUI
}
+ }
- wxASSERT_MSG( (LPVOID)rc != (LPVOID)STILL_ACTIVE,
- wxT("thread must be already terminated.") );
-
- ::CloseHandle(hThread);
+ if ( IsDetached() )
+ {
+ // if the thread exits normally, this is done in WinThreadStart, but in
+ // this case it would have been too early because
+ // MsgWaitForMultipleObject() would fail if the therad handle was
+ // closed while we were waiting on it, so we must do it here
+ delete this;
}
- return rc;
+ if ( pRc )
+ *pRc = rc;
+
+ return rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;
}
wxThreadError wxThread::Kill()
if ( !IsRunning() )
return wxTHREAD_NOT_RUNNING;
- if ( !::TerminateThread(p_internal->GetHandle(), (DWORD)-1) )
+// if ( !::TerminateThread(m_internal->GetHandle(), (DWORD)-1) )
{
wxLogSysError(_("Couldn't terminate thread"));
return wxTHREAD_MISC_ERROR;
}
- delete this;
+ m_internal->Free();
+
+ if ( IsDetached() )
+ {
+ delete this;
+ }
return wxTHREAD_NO_ERROR;
}
-void wxThread::Exit(void *status)
+void wxThread::Exit(ExitCode status)
{
- delete this;
+ m_internal->Free();
- ::ExitThread((DWORD)status);
+ if ( IsDetached() )
+ {
+ delete this;
+ }
+
+ m_internal->SetResult( status ) ;
+/*
+#if defined(__VISUALC__) || (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500))
+ _endthreadex((unsigned)status);
+#else // !VC++
+ ::ExitThread((DWORD)status);
+#endif // VC++/!VC++
+*/
wxFAIL_MSG(wxT("Couldn't return from ExitThread()!"));
}
+// priority setting
+// ----------------
+
+// since all these calls are execute cooperatively we don't have to use the critical section
+
void wxThread::SetPriority(unsigned int prio)
{
- wxCriticalSectionLocker lock(m_critsect);
-
- p_internal->SetPriority(prio);
+ m_internal->SetPriority(prio);
}
unsigned int wxThread::GetPriority() const
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return p_internal->GetPriority();
+ return m_internal->GetPriority();
}
-unsigned long wxThread::GetID() const
+unsigned long wxThread::GetId() const
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return (unsigned long)p_internal->GetId();
+ return (unsigned long)m_internal->GetId();
}
bool wxThread::IsRunning() const
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return p_internal->GetState() == STATE_RUNNING;
+ return m_internal->GetState() == STATE_RUNNING;
}
bool wxThread::IsAlive() const
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return (p_internal->GetState() == STATE_RUNNING) ||
- (p_internal->GetState() == STATE_PAUSED);
+ return (m_internal->GetState() == STATE_RUNNING) ||
+ (m_internal->GetState() == STATE_PAUSED);
}
bool wxThread::IsPaused() const
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return (p_internal->GetState() == STATE_PAUSED);
+ return m_internal->GetState() == STATE_PAUSED;
}
bool wxThread::TestDestroy()
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- return p_internal->GetState() == STATE_CANCELED;
-}
-
-wxThread::wxThread()
-{
- p_internal = new wxThreadInternal();
-}
-
-wxThread::~wxThread()
-{
- delete p_internal;
+ return m_internal->GetState() == STATE_CANCELED;
}
// ----------------------------------------------------------------------------
bool wxThreadModule::OnInit()
{
- // allocate TLS index for storing the pointer to the current thread
- s_tlsThisThread = ::TlsAlloc();
- if ( s_tlsThisThread == 0xFFFFFFFF )
- {
- // in normal circumstances it will only happen if all other
- // TLS_MINIMUM_AVAILABLE (>= 64) indices are already taken - in other
- // words, this should never happen
- wxLogSysError(_("Thread module initialization failed: "
- "impossible to allocate index in thread "
- "local storage"));
-
- return FALSE;
- }
-
- // main thread doesn't have associated wxThread object, so store 0 in the
- // TLS instead
- if ( !::TlsSetValue(s_tlsThisThread, (LPVOID)0) )
+ long response;
+ bool hasThreadManager ;
+ hasThreadManager = Gestalt( gestaltThreadMgrAttr, &response) == noErr && response & 1;
+#if !TARGET_CARBON
+#if GENERATINGCFM
+ // verify presence of shared library
+ hasThreadManager = hasThreadManager && ((Ptr)NewThread != (Ptr)kUnresolvedCFragSymbolAddress);
+#endif
+#endif
+ if ( !hasThreadManager )
{
- ::TlsFree(s_tlsThisThread);
- s_tlsThisThread = 0xFFFFFFFF;
-
- wxLogSysError(_("Thread module initialization failed: "
- "can not store value in thread local storage"));
-
- return FALSE;
+ wxMessageBox( wxT("Error") , wxT("Thread Support is not available on this System") , wxOK ) ;
+ return FALSE ;
}
- s_critsectWaitingForGui = new wxCriticalSection();
-
- s_critsectGui = new wxCriticalSection();
- s_critsectGui->Enter();
-
// no error return for GetCurrentThreadId()
- s_idMainThread = ::GetCurrentThreadId();
+ MacGetCurrentThread( &gs_idMainThread ) ;
return TRUE;
}
void wxThreadModule::OnExit()
{
- if ( !::TlsFree(s_tlsThisThread) )
- {
- wxLogLastError("TlsFree failed.");
- }
-
- if ( s_critsectGui )
- {
- s_critsectGui->Leave();
- delete s_critsectGui;
- s_critsectGui = NULL;
- }
-
- wxDELETE(s_critsectWaitingForGui);
}
// ----------------------------------------------------------------------------
-// under Windows, these functions are implemented usign a critical section and
-// not a mutex, so the names are a bit confusing
+// under MacOS we don't have currently preemptive threads, so any thread may access
+// the GUI at any time
// ----------------------------------------------------------------------------
void WXDLLEXPORT wxMutexGuiEnter()
{
- // this would dead lock everything...
- wxASSERT_MSG( !wxThread::IsMain(),
- wxT("main thread doesn't want to block in wxMutexGuiEnter()!") );
-
- // the order in which we enter the critical sections here is crucial!!
-
- // set the flag telling to the main thread that we want to do some GUI
- {
- wxCriticalSectionLocker enter(*s_critsectWaitingForGui);
-
- s_nWaitingForGui++;
- }
-
- wxWakeUpMainThread();
-
- // now we may block here because the main thread will soon let us in
- // (during the next iteration of OnIdle())
- s_critsectGui->Enter();
}
void WXDLLEXPORT wxMutexGuiLeave()
{
- wxCriticalSectionLocker enter(*s_critsectWaitingForGui);
-
- if ( wxThread::IsMain() )
- {
- s_bGuiOwnedByMainThread = FALSE;
- }
- else
- {
- // decrement the number of waiters now
- wxASSERT_MSG( s_nWaitingForGui > 0,
- wxT("calling wxMutexGuiLeave() without entering it first?") );
-
- s_nWaitingForGui--;
-
- wxWakeUpMainThread();
- }
-
- s_critsectGui->Leave();
}
void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
{
- wxASSERT_MSG( wxThread::IsMain(),
- wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
-
- wxCriticalSectionLocker enter(*s_critsectWaitingForGui);
-
- if ( s_nWaitingForGui == 0 )
- {
- // no threads are waiting for GUI - so we may acquire the lock without
- // any danger (but only if we don't already have it)
- if ( !wxGuiOwnedByMainThread() )
- {
- s_critsectGui->Enter();
-
- s_bGuiOwnedByMainThread = TRUE;
- }
- //else: already have it, nothing to do
- }
- else
- {
- // some threads are waiting, release the GUI lock if we have it
- if ( wxGuiOwnedByMainThread() )
- {
- wxMutexGuiLeave();
- }
- //else: some other worker thread is doing GUI
- }
}
bool WXDLLEXPORT wxGuiOwnedByMainThread()
{
- return s_bGuiOwnedByMainThread;
+ return false ;
}
-// wake up the main thread if it's in ::GetMessage()
+// wake up the main thread
void WXDLLEXPORT wxWakeUpMainThread()
{
- // sending any message would do - hopefully WM_NULL is harmless enough
- if ( !::PostThreadMessage(s_idMainThread, WM_NULL, 0, 0) )
- {
- // should never happen
- wxLogLastError("PostThreadMessage(WM_NULL)");
- }
+ wxMacWakeUp() ;
}
bool WXDLLEXPORT wxIsWaitingForThread()
{
- return s_waitingForThread;
+ return false ;
}
-*/
+
+#include "wx/thrimpl.cpp"
#endif // wxUSE_THREADS
projects / wxWidgets.git / blobdiff