| /* |
| * 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 "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 */ |