| /* |
| * pthread_setcanceltype.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" |
| |
| |
| int |
| pthread_setcanceltype (int type, int *oldtype) |
| /* |
| * ------------------------------------------------------ |
| * DOCPUBLIC |
| * This function atomically sets the calling thread's |
| * cancelability type to 'type' and returns the previous |
| * cancelability type at the location referenced by |
| * 'oldtype' |
| * |
| * PARAMETERS |
| * type, |
| * oldtype |
| * PTHREAD_CANCEL_DEFERRED |
| * only deferred cancelation is allowed, |
| * |
| * PTHREAD_CANCEL_ASYNCHRONOUS |
| * Asynchronous cancellation is allowed |
| * |
| * |
| * DESCRIPTION |
| * This function atomically sets the calling thread's |
| * cancelability type to 'type' and returns the previous |
| * cancelability type at the location referenced by |
| * 'oldtype' |
| * |
| * NOTES: |
| * 1) Use with caution; most code is not safe for use |
| * with asynchronous cancelability. |
| * |
| * COMPATIBILITY ADDITIONS |
| * If 'oldtype' is NULL then the previous type is not returned |
| * but the function still succeeds. (Solaris) |
| * |
| * RESULTS |
| * 0 successfully set cancelability type, |
| * EINVAL 'type' is invalid |
| * |
| * ------------------------------------------------------ |
| */ |
| { |
| int result = 0; |
| pthread_t self = pthread_self (); |
| ptw32_thread_t * sp = (ptw32_thread_t *) self.p; |
| |
| if (sp == NULL |
| || (type != PTHREAD_CANCEL_DEFERRED |
| && type != PTHREAD_CANCEL_ASYNCHRONOUS)) |
| { |
| return EINVAL; |
| } |
| |
| /* |
| * Lock for async-cancel safety. |
| */ |
| (void) pthread_mutex_lock (&sp->cancelLock); |
| |
| if (oldtype != NULL) |
| { |
| *oldtype = sp->cancelType; |
| } |
| |
| sp->cancelType = type; |
| |
| /* |
| * Check if there is a pending asynchronous cancel |
| */ |
| if (sp->cancelState == PTHREAD_CANCEL_ENABLE |
| && type == PTHREAD_CANCEL_ASYNCHRONOUS |
| && WaitForSingleObject (sp->cancelEvent, 0) == WAIT_OBJECT_0) |
| { |
| sp->state = PThreadStateCanceling; |
| sp->cancelState = PTHREAD_CANCEL_DISABLE; |
| ResetEvent (sp->cancelEvent); |
| (void) pthread_mutex_unlock (&sp->cancelLock); |
| ptw32_throw (PTW32_EPS_CANCEL); |
| |
| /* Never reached */ |
| } |
| |
| (void) pthread_mutex_unlock (&sp->cancelLock); |
| |
| return (result); |
| |
| } /* pthread_setcanceltype */ |