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Catching up to latest thread changes

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4799 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
David Webster
1999-12-02 23:32:25 +00:00
parent 4c460b340f
commit d01cc696fc
1 changed files with 234 additions and 117 deletions
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351
src/os2/thread.cpp
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@@ -86,8 +86,8 @@ wxMutex::wxMutex()
{
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."));
@@ -99,15 +99,15 @@ 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)
{
@@ -136,7 +136,7 @@ wxMutexError wxMutex::TryLock()
{
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;
@@ -151,7 +151,7 @@ wxMutexError wxMutex::Unlock()
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"));
@@ -167,6 +167,42 @@ wxMutexError wxMutex::Unlock()
class wxConditionInternal
{
public:
inline wxConditionInternal ()
{
::DosCreateEventSem(NULL, &m_vEvent, DC_SEM_SHARED, FALSE);
if (!m_vEvent)
{
wxLogSysError(_("Can not create event semaphore."));
}
m_nWaiters = 0;
}
inline bool Wait(
unsigned long ulTimeout
)
{
APIRET ulrc;
m_nWaiters++;
ulrc = ::DosWaitEventSem(m_vEvent, ulTimeout);
m_nWaiters--;
return (ulrc != ERROR_TIMEOUT);
}
inline ~wxConditionInternal ()
{
APIRET ulrc;
if (m_vEvent)
{
ulrc = ::DosCloseEventSem(m_vEvent);
if (!ulrc)
{
wxLogLastError("DosCloseEventSem(m_vEvent)");
}
}
}
HEV m_vEvent;
int m_nWaiters;
};
@@ -176,63 +212,48 @@ wxCondition::wxCondition()
APIRET ulrc;
ULONG ulCount;
p_internal = new wxConditionInternal;
ulrc = ::DosCreateEventSem(NULL, &p_internal->m_vEvent, 0L, FALSE);
m_internal = new wxConditionInternal;
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
)
void wxCondition::Wait()
{
rMutex.Unlock();
p_internal->m_nWaiters++;
::DosWaitEventSem(p_internal->m_vEvent, SEM_INDEFINITE_WAIT);
p_internal->m_nWaiters--;
rMutex.Lock();
(void)m_internal->Wait(SEM_INFINITE_WAIT);
}
bool wxCondition::Wait(
wxMutex& rMutex
, unsigned long ulSec
, unsigned long ulMillisec)
unsigned long lSec
, unsigned long lNsec)
{
APIRET ulrc;
rMutex.Unlock();
p_internal->m_nWaiters++;
ulrc = ::DosWaitEventSem(p_internal->m_vEvent, ULONG((ulSec * 1000L) + ulMillisec));
p_internal->m_nWaiters--;
rMutex.Lock();
return (ulrc != ERROR_TIMEOUT);
return m_internal->Wait(lSec*1000 + lNsec/1000000);
}
void wxCondition::Signal()
{
::DosPostEventSem(p_internal->m_vEvent);
::DosPostEventSem(m_internal->m_vEvent);
}
void wxCondition::Broadcast()
{
int i;
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 (::DosPostEventSem(m_internal->m_vEvent) != 0)
{
wxLogSysError(_("Couldn't change the state of event object."));
}
@@ -278,6 +299,20 @@ public:
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);
@@ -291,7 +326,7 @@ public:
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
@@ -318,36 +353,36 @@ ULONG wxThreadInternal::OS2ThreadStart(
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 = thread->m_internal->GetState() == STATE_CANCELED;
pThread->m_internal->SetState(STATE_EXITED);
thread->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 thread;
}
//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;
m_nPriority = nPriority;
if (m_nPriority <= 20)
ulOS2_Priority = PRTYC_NOCHANGE;
else if (m_nPriority <= 40)
@@ -372,7 +407,31 @@ bool wxThreadInternal::Create(
{
wxLogSysError(_("Can't set thread priority"));
}
return TRUE;
}
bool wxThreadInternal::Create(
wxThread* pThread
)
{
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;
}
if (m_nPriority != WXTHREAD_DEFAULT_PRIORITY)
{
SetPriority(m_nPriority);
}
return(TRUE);
}
bool wxThreadInternal::Suspend()
@@ -438,12 +497,27 @@ void wxThread::Sleep(
::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()
{
if ( !p_internal->Create(this) )
if ( !m_internal->Create(this) )
return wxTHREAD_NO_RESOURCE;
return wxTHREAD_NO_ERROR;
@@ -453,7 +527,7 @@ wxThreadError wxThread::Run()
{
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;
@@ -468,102 +542,157 @@ wxThreadError wxThread::Pause()
{
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_waitingForThread = 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();
}
#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 = ::DosWaitThread( &hThread
,DCWW_NOWAIT
);
switch (ulrc)
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 ERROR_INTERRUPT:
case ERROR_INVALID_THREADID:
case 0xFFFFFFFF:
// error
wxLogSysError(_("Can not wait for thread termination"));
Kill();
return (ExitCode)-1;
return wxTHREAD_KILLED;
case 0:
case WAIT_OBJECT_0:
// thread we're waiting for terminated
break;
case ERROR_THREAD_NOT_TERMINATED:
case WAIT_OBJECT_0 + 1:
// new message arrived, process it
if (!wxTheApp->DoMessage())
if ( !wxTheApp->DoMessage() )
{
// WM_QUIT received: kill the thread
Kill();
return (ExitCode)-1;
return wxTHREAD_KILLED;
}
if (IsMain())
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())
if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
{
wxMutexGuiLeave();
}
}
break;
default:
wxFAIL_MSG(wxT("unexpected result of DosWatiThread"));
wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));
}
} while (ulrc != 0);
if (IsMain())
} 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 )
{
s_bWaitingForThread = FALSE;
wxEndBusyCursor();
wxFAIL_MSG(wxT("unexpected result of WaitForSingleObject"));
}
#endif // wxUSE_GUI/!wxUSE_GUI
::DosExit(EXIT_THREAD, ulrc);
if ( IsMain() )
{
gs_waitingForThread = FALSE;
#if wxUSE_GUI
wxEndBusyCursor();
#endif // wxUSE_GUI
}
}
rc = (ExitCode)ulrc;
return rc;
if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
{
wxLogLastError("GetExitCodeThread");
rc = (ExitCode)-1;
}
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 rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;
}
wxThreadError wxThread::Kill()
@@ -571,7 +700,7 @@ wxThreadError wxThread::Kill()
if (!IsRunning())
return wxTHREAD_NOT_RUNNING;
::DosKillThread(p_internal->GetHandle());
::DosKillThread(m_internal->GetHandle());
delete this;
return wxTHREAD_NO_ERROR;
}
@@ -591,60 +720,48 @@ void wxThread::SetPriority(
{
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();
}
unsigned long wxThread::GetID() const
{
wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
return (unsigned long)p_internal->GetId();
return m_internal->GetPriority();
}
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();
return m_internal->GetState() == STATE_CANCELED;
}
wxThread::~wxThread()
{
delete p_internal;
delete m_internal;
}
// ----------------------------------------------------------------------------