static ULONG vlc_DosWaitEventSemEx( HEV hev, ULONG ulTimeout, BOOL fCancelable )
{
HMUX hmux;
SEMRECORD asr[ 2 ];
ULONG ulUser;
int n;
ULONG rc;
struct vlc_thread *th = vlc_threadvar_get( thread_key );
if( th == NULL || !fCancelable )
{
/* Main thread - cannot be cancelled anyway
* Alien thread - out of our control
*/
if( hev != NULLHANDLE )
return DosWaitEventSem( hev, ulTimeout );
return DosSleep( ulTimeout );
}
n = 0;
if( hev != NULLHANDLE )
{
asr[ n ].hsemCur = ( HSEM )hev;
asr[ n ].ulUser = 0;
n++;
}
asr[ n ].hsemCur = ( HSEM )th->cancel_event;
asr[ n ].ulUser = 0xFFFF;
n++;
DosCreateMuxWaitSem( NULL, &hmux, n, asr, DCMW_WAIT_ANY );
rc = DosWaitMuxWaitSem( hmux, ulTimeout, &ulUser );
DosCloseMuxWaitSem( hmux );
if( rc )
return rc;
if( ulUser == 0xFFFF )
{
vlc_cancel_self( th );
return ERROR_INTERRUPT;
}
return NO_ERROR;
}
static DWORD vlc_WaitForMultipleObjects (DWORD count, const HANDLE *handles,
DWORD delay)
{
DWORD ret;
#ifdef UNDER_CE
HANDLE buf[count + 1];
struct vlc_thread *th = vlc_threadvar_get (thread_key);
if (th != NULL)
{
memcpy (buf, handles, count * sizeof(HANDLE));
buf[count++] = th->cancel_event;
handles = buf;
}
if (count == 0)
{
Sleep (delay);
ret = WAIT_TIMEOUT;
}
else
ret = WaitForMultipleObjects (count, handles, FALSE, delay);
if ((th != NULL) && (ret == WAIT_OBJECT_0 + count - 1))
{
vlc_cancel_self ((uintptr_t)th);
ret = WAIT_IO_COMPLETION;
}
#else
if (count == 0)
{
ret = SleepEx (delay, TRUE);
if (ret == 0)
ret = WAIT_TIMEOUT;
}
else
ret = WaitForMultipleObjectsEx (count, handles, FALSE, delay, TRUE);
#endif
/* We do not abandon objects... this would be a bug */
assert (ret < WAIT_ABANDONED_0 || WAIT_ABANDONED_0 + count - 1 < ret);
if (unlikely(ret == WAIT_FAILED))
abort (); /* We are screwed! */
return ret;
}
void vlc_testcancel (void)
{
struct vlc_thread *th = vlc_threadvar_get (thread_key);
if (th == NULL)
return; /* Main thread - cannot be cancelled anyway */
/* This check is needed for the case that vlc_cancel() is followed by
* vlc_testcancel() without any cancellation point */
if( DosWaitEventSem( th->cancel_event, 0 ) == NO_ERROR )
vlc_cancel_self( NULL );
if (th->killable && th->killed)
{
for (vlc_cleanup_t *p = th->cleaners; p != NULL; p = p->next)
p->proc (p->data);
DosPostEventSem( th->done_event );
th->data = NULL; /* TODO: special value? */
vlc_thread_cleanup (th);
_endthread();
}
}
static DWORD vlc_cancelable_wait (DWORD count, const HANDLE *handles,
DWORD delay)
{
vlc_cancel_t *nfo = vlc_threadvar_get (cancel_key);
if (nfo == NULL)
{
/* Main thread - cannot be cancelled anyway */
return WaitForMultipleObjects (count, handles, FALSE, delay);
}
HANDLE new_handles[count + 1];
memcpy(new_handles, handles, count * sizeof(HANDLE));
new_handles[count] = nfo->cancel_event;
DWORD result = WaitForMultipleObjects (count + 1, new_handles, FALSE,
delay);
if (result == WAIT_OBJECT_0 + count)
{
vlc_cancel_self (NULL);
return WAIT_IO_COMPLETION;
}
else
{
return result;
}
}
