pcsx2/3rdparty/w32pthreads/pthread_testcancel.c

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/*
* pthread_testcancel.c
*
* Description:
* POSIX thread functions related to thread cancellation.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2005 Pthreads-win32 contributors
*
* Contact Email: rpj@callisto.canberra.edu.au
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* http://sources.redhat.com/pthreads-win32/contributors.html
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library in the file COPYING.LIB;
* if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "ptw32pch.h"
INLINE void
pthread_testcancel (void)
/*
* ------------------------------------------------------
* DOCPUBLIC
* This function creates a deferred cancellation point
* in the calling thread. The call has no effect if the
* current cancelability state is
* PTHREAD_CANCEL_DISABLE
*
* PARAMETERS
* N/A
*
*
* DESCRIPTION
* This function creates a deferred cancellation point
* in the calling thread. The call has no effect if the
* current cancelability state is
* PTHREAD_CANCEL_DISABLE
*
* NOTES:
* 1) Cancellation is asynchronous. Use pthread_join
* to wait for termination of thread if necessary
*
* RESULTS
* N/A
*
* ------------------------------------------------------
*/
{
ptw32_thread_t * sp;
if( ptw32_testcancel_enable == 0 ) return;
// Don't use pthread_self here, to avoid unnecessary object query or creation.
// If ptw32_selfThread is NULL, then it's a sure bet no one's tried to cancel
// this thread, since that would have spawned a selfThread object! -- air
sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
if (sp == NULL)
{
return;
}
/*
* Pthread_cancel() will have set sp->state to PThreadStateCancelPending
* and set an event, so no need to enter kernel space if
* sp->state != PThreadStateCancelPending - that only slows us down.
*/
if (sp->state != PThreadStateCancelPending)
{
return;
}
_InterlockedDecrement( &ptw32_testcancel_enable );
(void) pthread_mutex_lock (&sp->cancelLock);
if (sp->cancelState != PTHREAD_CANCEL_DISABLE)
{
ResetEvent(sp->cancelEvent);
sp->state = PThreadStateCanceling;
(void) pthread_mutex_unlock (&sp->cancelLock);
sp->cancelState = PTHREAD_CANCEL_DISABLE;
(void) pthread_mutex_unlock (&sp->cancelLock);
ptw32_throw (PTW32_EPS_CANCEL);
}
(void) pthread_mutex_unlock (&sp->cancelLock);
} /* pthread_testcancel */