// 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;
{
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(m_internal->m_vMutex);
m_internal->m_vMutex = NULL;
}
default:
wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));
}
- m_locked++;
return wxMUTEX_NO_ERROR;
}
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(m_internal->m_vMutex);
if (ulrc != 0)
{
class wxConditionInternal
{
public:
- inline wxConditionInternal ()
+ inline wxConditionInternal (wxMutex& rMutex) : m_vMutex(rMutex)
{
::DosCreateEventSem(NULL, &m_vEvent, DC_SEM_SHARED, FALSE);
if (!m_vEvent)
m_nWaiters = 0;
}
- inline bool Wait(
+ inline APIRET Wait(
unsigned long ulTimeout
)
{
m_nWaiters++;
ulrc = ::DosWaitEventSem(m_vEvent, ulTimeout);
m_nWaiters--;
- return (ulrc != ERROR_TIMEOUT);
+ return (ulrc);
}
inline ~wxConditionInternal ()
HEV m_vEvent;
int m_nWaiters;
+ wxMutex& m_vMutex;
};
-wxCondition::wxCondition()
+wxCondition::wxCondition(wxMutex& rMutex)
{
APIRET ulrc;
ULONG ulCount;
- m_internal = new wxConditionInternal;
+ m_internal = new wxConditionInternal(rMutex);
ulrc = ::DosCreateEventSem(NULL, &m_internal->m_vEvent, 0L, FALSE);
if (ulrc != 0)
{
m_internal = NULL;
}
-void wxCondition::Wait()
+wxCondError wxCondition::Wait()
{
- (void)m_internal->Wait(SEM_INFINITE_WAIT);
+ 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(
- unsigned long lSec
-, unsigned long lNsec)
+wxCondError wxCondition::WaitTimeout(
+ unsigned long lMilliSec
+)
{
- return m_internal->Wait(lSec*1000 + lNsec/1000000);
+ APIRET rc = m_internal->Wait(lMilliSec);
+
+ 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(m_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 < m_internal->m_nWaiters; i++)
{
- if (::DosPostEventSem(m_internal->m_vEvent) != 0)
+ if ((rc = ::DosPostEventSem(m_internal->m_vEvent)) != NO_ERROR)
{
wxLogSysError(_("Couldn't change the state of event object."));
+ break;
}
}
+
+ switch(rc)
+ {
+ case NO_ERROR:
+ return wxCOND_NO_ERROR;
+ case ERROR_INVALID_HANDLE:
+ return wxCOND_INVALID;
+ default:
+ return wxCOND_MISC_ERROR;
+ }
}
// ----------------------------------------------------------------------------
}
// 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();
// enter m_critsect before changing the thread state
pThread->m_critsect.Enter();
- bool bWasCancelled = thread->m_internal->GetState() == STATE_CANCELED;
+ bool bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED;
pThread->m_internal->SetState(STATE_EXITED);
- thread->m_critsect.Leave();
+ pThread->m_critsect.Leave();
pThread->OnExit();
if (pThread->IsDetached() && !bWasCancelled)
{
// auto delete
- delete thread;
+ delete pThread;
}
//else: the joinable threads handle will be closed when Wait() is done
return dwRet;
{
// translate wxWindows priority to the PM one
ULONG ulOS2_Priority;
+ ULONG ulrc;
m_nPriority = nPriority;
bool wxThreadInternal::Create(
wxThread* pThread
+, unsigned int uStackSize
)
{
APIRET ulrc;
,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
,(ULONG)pThread
,CREATE_SUSPENDED | STACK_SPARSE
- ,8192L
+ ,(ULONG)uStackSize
);
if(ulrc != 0)
{
{
SetPriority(m_nPriority);
}
+
+ m_eState = STATE_NEW;
+
return(TRUE);
}
// create/start thread
// -------------------
-wxThreadError wxThread::Create()
+wxThreadError wxThread::Create(
+ unsigned int uStackSize
+)
{
- if ( !m_internal->Create(this) )
+ if ( !m_internal->Create(this, uStackSize) )
return wxTHREAD_NO_RESOURCE;
return wxTHREAD_NO_ERROR;
if (IsMain())
{
// set flag for wxIsWaitingForThread()
- gs_waitingForThread = TRUE;
+ gs_bWaitingForThread = TRUE;
#if wxUSE_GUI
wxBeginBusyCursor();
}
#if wxUSE_GUI
- // 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
- ULONG ulrc;
- do
- {
- ulrc = ::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 wxTHREAD_KILLED;
-
- 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 wxTHREAD_KILLED;
- }
-
- if ( IsMain() )
- {
- // give the thread we're waiting for chance to exit
- // from the GUI call it might have been in
- if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
- {
- wxMutexGuiLeave();
- }
- }
-
- break;
-
- default:
- wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));
- }
- } while ( result != WAIT_OBJECT_0 );
-#else // !wxUSE_GUI
- // simply wait for the thread to terminate
- //
- // OTOH, even console apps create windows (in wxExecute, for WinSock
- // &c), so may be use MsgWaitForMultipleObject() too here?
- if ( WaitForSingleObject(hThread, INFINITE) != WAIT_OBJECT_0 )
+ // need a way to finish GUI processing before killing the thread
+ // until then we just exit
+
+ if ((gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread())
{
- wxFAIL_MSG(wxT("unexpected result of WaitForSingleObject"));
+ wxMutexGuiLeave();
}
+#else // !wxUSE_GUI
+
+ // can't wait for yourself to end under OS/2 so just quit
+
#endif // wxUSE_GUI/!wxUSE_GUI
if ( IsMain() )
{
- gs_waitingForThread = FALSE;
+ gs_bWaitingForThread = FALSE;
#if wxUSE_GUI
wxEndBusyCursor();
}
}
- if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
- {
- wxLogLastError("GetExitCodeThread");
-
- rc = (ExitCode)-1;
- }
-
- if ( IsDetached() )
+ ::DosExit(0, 0);
+ // probably won't get this far, but
+ 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;
}
- wxASSERT_MSG( (DWORD)rc != STILL_ACTIVE,
- wxT("thread must be already terminated.") );
-
if ( pRc )
*pRc = rc;
return wxTHREAD_NOT_RUNNING;
::DosKillThread(m_internal->GetHandle());
- delete this;
+ 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()!"));
return m_internal->GetPriority();
}
+unsigned long wxThread::GetId() const
+{
+ wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); // const_cast
+
+ return (unsigned long)m_internal->GetId();
+}
+
bool wxThread::IsRunning() const
{
wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
- return m_internal->GetState() == STATE_RUNNING;
+ return(m_internal->GetState() == STATE_RUNNING);
}
bool wxThread::IsAlive() const
return m_internal->GetState() == STATE_CANCELED;
}
-wxThread::~wxThread()
-{
- delete m_internal;
-}
-
// ----------------------------------------------------------------------------
// Automatic initialization for thread module
// ----------------------------------------------------------------------------
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
projects / wxWidgets.git / blobdiff