// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+#ifdef __GNUG__
+ #pragma implementation "thread.h"
+#endif
+
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include <stdio.h>
#include "wx/module.h"
+#include "wx/intl.h"
+#include "wx/utils.h"
+#include "wx/log.h"
#include "wx/thread.h"
#define INCL_DOSSEMAPHORES
#define INCL_DOSPROCESS
#define INCL_ERRORS
#include <os2.h>
+#ifndef __EMX__
#include <bseerr.h>
-
+#endif
// the possible states of the thread ("=>" shows all possible transitions from
// this state)
enum wxThreadState
wxThread* m_pThread; // pointer to the wxWindows thread object
// if it's FALSE, some secondary thread is holding the GUI lock
-static bool s_bGuiOwnedByMainThread = TRUE;
+static bool gs_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_pCritsectGui = NULL;
+static wxCriticalSection *gs_pCritsectGui = NULL;
// critical section which protects s_nWaitingForGui variable
-static wxCriticalSection *s_pCritsectWaitingForGui = NULL;
+static wxCriticalSection *gs_pCritsectWaitingForGui = NULL;
// number of threads waiting for GUI in wxMutexGuiEnter()
-static size_t s_nWaitingForGui = 0;
+static size_t gs_nWaitingForGui = 0;
// are we waiting for a thread termination?
-static bool s_bWaitingForThread = FALSE;
+static bool gs_bWaitingForThread = FALSE;
// ============================================================================
// OS/2 implementation of thread classes
HMTX m_vMutex;
};
-wxMutex::wxMutex()
+wxMutex::wxMutex(
+ wxMutexType eMutexType
+)
{
APIRET ulrc;
- p_internal = new wxMutexInternal;
- ulrc = ::DosCreateMutexSem(NULL, &p_internal->m_vMutex, 0L, FALSE);
+ m_internal = new wxMutexInternal;
+ ulrc = ::DosCreateMutexSem(NULL, &m_internal->m_vMutex, 0L, FALSE);
if (ulrc != 0)
{
wxLogSysError(_("Can not create mutex."));
}
- m_locked = 0;
}
wxMutex::~wxMutex()
{
- if (m_locked > 0)
- wxLogDebug(wxT("Warning: freeing a locked mutex (%d locks)."), m_locked);
- ::DosCloseMutexSem(p_internal->m_vMutex);
- p_internal->m_vMutex = NULL;
+ ::DosCloseMutexSem(m_internal->m_vMutex);
+ m_internal->m_vMutex = NULL;
}
wxMutexError wxMutex::Lock()
{
APIRET ulrc;
- ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_INDEFINITE_WAIT);
+ ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_INDEFINITE_WAIT);
switch (ulrc)
{
default:
wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));
}
- m_locked++;
return wxMUTEX_NO_ERROR;
}
{
ULONG ulrc;
- ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/);
+ ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/);
if (ulrc == ERROR_TIMEOUT || ulrc == ERROR_TOO_MANY_SEM_REQUESTS)
return wxMUTEX_BUSY;
- m_locked++;
return wxMUTEX_NO_ERROR;
}
{
APIRET ulrc;
- if (m_locked > 0)
- m_locked--;
-
- ulrc = ::DosReleaseMutexSem(p_internal->m_vMutex);
+ ulrc = ::DosReleaseMutexSem(m_internal->m_vMutex);
if (ulrc != 0)
{
wxLogSysError(_("Couldn't release a mutex"));
class wxConditionInternal
{
public:
+ inline wxConditionInternal (wxMutex& rMutex) : m_vMutex(rMutex)
+ {
+ ::DosCreateEventSem(NULL, &m_vEvent, DC_SEM_SHARED, FALSE);
+ if (!m_vEvent)
+ {
+ wxLogSysError(_("Can not create event semaphore."));
+ }
+ m_nWaiters = 0;
+ }
+
+ inline APIRET Wait(
+ unsigned long ulTimeout
+ )
+ {
+ APIRET ulrc;
+
+ m_nWaiters++;
+ ulrc = ::DosWaitEventSem(m_vEvent, ulTimeout);
+ m_nWaiters--;
+ return (ulrc);
+ }
+
+ inline ~wxConditionInternal ()
+ {
+ APIRET ulrc;
+
+ if (m_vEvent)
+ {
+ ulrc = ::DosCloseEventSem(m_vEvent);
+ if (!ulrc)
+ {
+ wxLogLastError("DosCloseEventSem(m_vEvent)");
+ }
+ }
+ }
+
HEV m_vEvent;
int m_nWaiters;
+ wxMutex& m_vMutex;
};
-wxCondition::wxCondition()
+wxCondition::wxCondition(wxMutex& rMutex)
{
APIRET ulrc;
ULONG ulCount;
- p_internal = new wxConditionInternal;
- ulrc = ::DosCreateEventSem(NULL, &p_internal->m_vEvent, 0L, FALSE);
+ m_internal = new wxConditionInternal(rMutex);
+ ulrc = ::DosCreateEventSem(NULL, &m_internal->m_vEvent, 0L, FALSE);
if (ulrc != 0)
{
wxLogSysError(_("Can not create event object."));
}
- p_internal->m_nWaiters = 0;
+ m_internal->m_nWaiters = 0;
// ?? just for good measure?
- ::DosResetEventSem(p_internal->m_vEvent, &ulCount);
+ ::DosResetEventSem(m_internal->m_vEvent, &ulCount);
}
wxCondition::~wxCondition()
{
- ::DosCloseEventSem(p_internal->m_vEvent);
- delete p_internal;
- p_internal = NULL;
+ ::DosCloseEventSem(m_internal->m_vEvent);
+ delete m_internal;
+ m_internal = NULL;
}
-void wxCondition::Wait(
- wxMutex& rMutex
-)
+wxCondError wxCondition::Wait()
{
- rMutex.Unlock();
- p_internal->m_nWaiters++;
- ::DosWaitEventSem(p_internal->m_vEvent, SEM_INDEFINITE_WAIT);
- p_internal->m_nWaiters--;
- rMutex.Lock();
+ APIRET rc = m_internal->Wait(SEM_INDEFINITE_WAIT);
+
+ switch(rc)
+ {
+ case NO_ERROR:
+ return wxCOND_NO_ERROR;
+ case ERROR_INVALID_HANDLE:
+ return wxCOND_INVALID;
+ case ERROR_TIMEOUT:
+ return wxCOND_TIMEOUT;
+ default:
+ return wxCOND_MISC_ERROR;
+ }
}
-bool wxCondition::Wait(
- wxMutex& rMutex
-, unsigned long ulSec
-, unsigned long ulMillisec)
+wxCondError wxCondition::WaitTimeout(
+ unsigned long lMilliSec
+)
{
- APIRET ulrc;
-
- rMutex.Unlock();
- p_internal->m_nWaiters++;
- ulrc = ::DosWaitEventSem(p_internal->m_vEvent, ULONG((ulSec * 1000L) + ulMillisec));
- p_internal->m_nWaiters--;
- rMutex.Lock();
+ APIRET rc = m_internal->Wait(lMilliSec);
- return (ulrc != ERROR_TIMEOUT);
+ switch(rc)
+ {
+ case NO_ERROR:
+ return wxCOND_NO_ERROR;
+ case ERROR_INVALID_HANDLE:
+ return wxCOND_INVALID;
+ case ERROR_TIMEOUT:
+ return wxCOND_TIMEOUT;
+ default:
+ return wxCOND_MISC_ERROR;
+ }
}
-void wxCondition::Signal()
+wxCondError wxCondition::Signal()
{
- ::DosPostEventSem(p_internal->m_vEvent);
+ APIRET rc = ::DosPostEventSem(m_internal->m_vEvent);
+
+ switch(rc)
+ {
+ case NO_ERROR:
+ return wxCOND_NO_ERROR;
+ case ERROR_INVALID_HANDLE:
+ return wxCOND_INVALID;
+ default:
+ return wxCOND_MISC_ERROR;
+ }
}
-void wxCondition::Broadcast()
+wxCondError wxCondition::Broadcast()
{
int i;
+ APIRET rc = NO_ERROR;
- for (i = 0; i < p_internal->m_nWaiters; i++)
+ for (i = 0; i < m_internal->m_nWaiters; i++)
{
- if (::DosPostEventSem(p_internal->m_vEvent) != 0)
+ if ((rc = ::DosPostEventSem(m_internal->m_vEvent)) != NO_ERROR)
{
wxLogSysError(_("Couldn't change the state of event object."));
+ break;
}
}
-}
-
-// ----------------------------------------------------------------------------
-// wxCriticalSection implementation
-// ----------------------------------------------------------------------------
-
-class wxCriticalSectionInternal
-{
-public:
- // init the critical section object
- wxCriticalSectionInternal()
- { }
-
- // free the associated ressources
- ~wxCriticalSectionInternal()
- { }
-private:
-};
+ switch(rc)
+ {
+ case NO_ERROR:
+ return wxCOND_NO_ERROR;
+ case ERROR_INVALID_HANDLE:
+ return wxCOND_INVALID;
+ default:
+ return wxCOND_MISC_ERROR;
+ }
+}
// ----------------------------------------------------------------------------
// wxCriticalSection implementation
wxCriticalSection::wxCriticalSection()
{
- m_critsect = new wxCriticalSectionInternal;
}
wxCriticalSection::~wxCriticalSection()
{
- delete m_critsect;
}
void wxCriticalSection::Enter()
m_nPriority = 0;
}
+ ~wxThreadInternal()
+ {
+ Free();
+ }
+
+ void Free()
+ {
+ if (m_hThread)
+ {
+ ::DosExit(0,0);
+ m_hThread = 0;
+ }
+ }
+
// create a new (suspended) thread (for the given thread object)
- bool Create(wxThread* pThread);
+ bool Create( wxThread* pThread
+ ,unsigned int uStackSize
+ );
// suspend/resume/terminate
bool Suspend();
inline wxThreadState GetState() const { return m_eState; }
// thread priority
- inline void SetPriority(unsigned int nPriority) { m_nPriority = nPriority; }
+ void SetPriority(unsigned int nPriority);
inline unsigned int GetPriority() const { return m_nPriority; }
// thread handle and id
DWORD dwRet = (DWORD)pThread->Entry();
- pThread->p_internal->SetState(STATE_EXITED);
+ // enter m_critsect before changing the thread state
+ pThread->m_critsect.Enter();
+
+ bool bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED;
+
+ pThread->m_internal->SetState(STATE_EXITED);
+ pThread->m_critsect.Leave();
+
pThread->OnExit();
- delete pThread;
- m_pThread = NULL;
+ // if the thread was cancelled (from Delete()), then it the handle is still
+ // needed there
+ if (pThread->IsDetached() && !bWasCancelled)
+ {
+ // auto delete
+ delete pThread;
+ }
+ //else: the joinable threads handle will be closed when Wait() is done
return dwRet;
}
-bool wxThreadInternal::Create(
- wxThread* pThread
+void wxThreadInternal::SetPriority(
+ unsigned int nPriority
)
{
- APIRET ulrc;
-
- ulrc = ::DosCreateThread( &m_hThread
- ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
- ,(ULONG)pThread
- ,CREATE_SUSPENDED | STACK_SPARSE
- ,8192L
- );
- if(ulrc != 0)
- {
- wxLogSysError(_("Can't create thread"));
-
- return FALSE;
- }
-
// translate wxWindows priority to the PM one
ULONG ulOS2_Priority;
+ ULONG ulrc;
+
+ m_nPriority = nPriority;
if (m_nPriority <= 20)
ulOS2_Priority = PRTYC_NOCHANGE;
{
wxLogSysError(_("Can't set thread priority"));
}
- return TRUE;
+}
+
+bool wxThreadInternal::Create(
+ wxThread* pThread
+, unsigned int uStackSize
+)
+{
+ APIRET ulrc;
+
+ ulrc = ::DosCreateThread( &m_hThread
+ ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
+ ,(ULONG)pThread
+ ,CREATE_SUSPENDED | STACK_SPARSE
+ ,(ULONG)uStackSize
+ );
+ if(ulrc != 0)
+ {
+ wxLogSysError(_("Can't create thread"));
+
+ return FALSE;
+ }
+ if (m_nPriority != WXTHREAD_DEFAULT_PRIORITY)
+ {
+ SetPriority(m_nPriority);
+ }
+
+ m_eState = STATE_NEW;
+
+ return(TRUE);
}
bool wxThreadInternal::Suspend()
::DosSleep(ulMilliseconds);
}
+// ctor and dtor
+// -------------
+
+wxThread::wxThread(wxThreadKind kind)
+{
+ m_internal = new wxThreadInternal();
+
+ m_isDetached = kind == wxTHREAD_DETACHED;
+}
+
+wxThread::~wxThread()
+{
+ delete m_internal;
+}
+
// create/start thread
// -------------------
-wxThreadError wxThread::Create()
+wxThreadError wxThread::Create(
+ unsigned int uStackSize
+)
{
- if ( !p_internal->Create(this) )
+ if ( !m_internal->Create(this, uStackSize) )
return wxTHREAD_NO_RESOURCE;
return wxTHREAD_NO_ERROR;
{
wxCriticalSectionLocker lock((wxCriticalSection &)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;
{
wxCriticalSectionLocker lock((wxCriticalSection &)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((wxCriticalSection &)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()
{
- ExitCode rc = 0;
- ULONG ulrc;
+ // although under Windows 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())
Resume();
+ TID hThread = m_internal->GetHandle();
+
if (IsRunning())
{
if (IsMain())
{
// set flag for wxIsWaitingForThread()
- s_bWaitingForThread = TRUE;
+ gs_bWaitingForThread = TRUE;
+
+#if wxUSE_GUI
wxBeginBusyCursor();
+#endif // wxUSE_GUI
}
- TID hThread;
-
+ // ask the thread to terminate
{
- wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
-
- p_internal->Cancel();
- hThread = p_internal->GetHandle();
+ wxCriticalSectionLocker lock(m_critsect);
+ 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
+#if wxUSE_GUI
+ // need a way to finish GUI processing before killing the thread
+ // until then we just exit
- do
+ if ((gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread())
{
- ulrc = ::DosWaitThread( &hThread
- ,DCWW_NOWAIT
- );
- switch (ulrc)
- {
- case ERROR_INTERRUPT:
- case ERROR_INVALID_THREADID:
- // error
- wxLogSysError(_("Can not wait for thread termination"));
- Kill();
- return (ExitCode)-1;
-
- case 0:
- // thread we're waiting for terminated
- break;
-
- case ERROR_THREAD_NOT_TERMINATED:
- // 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 DosWatiThread"));
- }
- } while (ulrc != 0);
+ wxMutexGuiLeave();
+ }
+#else // !wxUSE_GUI
- if (IsMain())
+ // can't wait for yourself to end under OS/2 so just quit
+
+#endif // wxUSE_GUI/!wxUSE_GUI
+
+ if ( IsMain() )
{
- s_bWaitingForThread = FALSE;
+ gs_bWaitingForThread = FALSE;
+
+#if wxUSE_GUI
wxEndBusyCursor();
+#endif // wxUSE_GUI
}
+ }
- ::DosExit(EXIT_THREAD, ulrc);
+ ::DosExit(0, 0);
+ // probably won't get this far, but
+ if (IsDetached())
+ {
+ delete this;
}
- rc = (ExitCode)ulrc;
- 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;
- ::DosKillThread(p_internal->GetHandle());
- delete this;
+ ::DosKillThread(m_internal->GetHandle());
+ m_internal->Free();
+ if (IsDetached())
+ {
+ delete this;
+ }
return wxTHREAD_NO_ERROR;
}
void wxThread::Exit(
- void* pStatus
+ ExitCode pStatus
)
{
+ m_internal->Free();
delete this;
::DosExit(EXIT_THREAD, ULONG(pStatus));
wxFAIL_MSG(wxT("Couldn't return from DosExit()!"));
{
wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
- p_internal->SetPriority(nPrio);
+ m_internal->SetPriority(nPrio);
}
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);
+ wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); // const_cast
- 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()
{
- s_pCritsectWaitingForGui = new wxCriticalSection();
+ gs_pCritsectWaitingForGui = new wxCriticalSection();
- s_pCritsectGui = new wxCriticalSection();
- s_pCritsectGui->Enter();
+ gs_pCritsectGui = new wxCriticalSection();
+ gs_pCritsectGui->Enter();
PTIB ptib;
PPIB ppib;
void wxThreadModule::OnExit()
{
- if (s_pCritsectGui)
+ if (gs_pCritsectGui)
{
- s_pCritsectGui->Leave();
- delete s_pCritsectGui;
- s_pCritsectGui = NULL;
+ gs_pCritsectGui->Leave();
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+ delete gs_pCritsectGui;
+#endif
+ gs_pCritsectGui = NULL;
}
- wxDELETE(s_pCritsectWaitingForGui);
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+ wxDELETE(gs_pCritsectWaitingForGui);
+#endif
}
// ----------------------------------------------------------------------------
void WXDLLEXPORT wxMutexGuiLeave()
{
- wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+ wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);
if ( wxThread::IsMain() )
{
- s_bGuiOwnedByMainThread = FALSE;
+ gs_bGuiOwnedByMainThread = FALSE;
}
else
{
// decrement the number of waiters now
- wxASSERT_MSG( s_nWaitingForGui > 0,
+ wxASSERT_MSG(gs_nWaitingForGui > 0,
wxT("calling wxMutexGuiLeave() without entering it first?") );
- s_nWaitingForGui--;
+ gs_nWaitingForGui--;
wxWakeUpMainThread();
}
- s_pCritsectGui->Leave();
+ gs_pCritsectGui->Leave();
}
void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
wxASSERT_MSG( wxThread::IsMain(),
wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
- wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+ wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);
- if ( s_nWaitingForGui == 0 )
+ if (gs_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_pCritsectGui->Enter();
+ gs_pCritsectGui->Enter();
- s_bGuiOwnedByMainThread = TRUE;
+ gs_bGuiOwnedByMainThread = TRUE;
}
//else: already have it, nothing to do
}
bool WXDLLEXPORT wxGuiOwnedByMainThread()
{
- return s_bGuiOwnedByMainThread;
+ return gs_bGuiOwnedByMainThread;
}
bool WXDLLEXPORT wxIsWaitingForThread()
{
- return s_bWaitingForThread;
+ return gs_bWaitingForThread;
}
#endif
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