104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
|
/*
|
||
|
|
* 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.,
|
||
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "pthread.h"
|
||
|
|
#include "implement.h"
|
||
|
|
|
||
|
|
|
||
|
|
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_mcs_local_node_t stateLock;
|
||
|
|
pthread_t self = pthread_self ();
|
||
|
|
ptw32_thread_t * sp = (ptw32_thread_t *) self.p;
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
ptw32_mcs_lock_acquire (&sp->stateLock, &stateLock);
|
||
|
|
|
||
|
|
if (sp->cancelState != PTHREAD_CANCEL_DISABLE)
|
||
|
|
{
|
||
|
|
ResetEvent(sp->cancelEvent);
|
||
|
|
sp->state = PThreadStateCanceling;
|
||
|
|
sp->cancelState = PTHREAD_CANCEL_DISABLE;
|
||
|
|
ptw32_mcs_lock_release (&stateLock);
|
||
|
|
ptw32_throw (PTW32_EPS_CANCEL);
|
||
|
|
/* Never returns here */
|
||
|
|
}
|
||
|
|
|
||
|
|
ptw32_mcs_lock_release (&stateLock);
|
||
|
|
} /* pthread_testcancel */
|