| /* |
| * cleanup.c |
| * |
| * Description: |
| * This translation unit implements routines associated |
| * with cleaning up threads. |
| * |
| * |
| * -------------------------------------------------------------------------- |
| * |
| * 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" |
| |
| |
| /* |
| * The functions ptw32_pop_cleanup and ptw32_push_cleanup |
| * are implemented here for applications written in C with no |
| * SEH or C++ destructor support. |
| */ |
| |
| ptw32_cleanup_t * |
| ptw32_pop_cleanup (int execute) |
| /* |
| * ------------------------------------------------------ |
| * DOCPUBLIC |
| * This function pops the most recently pushed cleanup |
| * handler. If execute is nonzero, then the cleanup handler |
| * is executed if non-null. |
| * |
| * PARAMETERS |
| * execute |
| * if nonzero, execute the cleanup handler |
| * |
| * |
| * DESCRIPTION |
| * This function pops the most recently pushed cleanup |
| * handler. If execute is nonzero, then the cleanup handler |
| * is executed if non-null. |
| * NOTE: specify 'execute' as nonzero to avoid duplication |
| * of common cleanup code. |
| * |
| * RESULTS |
| * N/A |
| * |
| * ------------------------------------------------------ |
| */ |
| { |
| ptw32_cleanup_t *cleanup; |
| |
| cleanup = (ptw32_cleanup_t *) pthread_getspecific (ptw32_cleanupKey); |
| |
| if (cleanup != NULL) |
| { |
| if (execute && (cleanup->routine != NULL)) |
| { |
| |
| (*cleanup->routine) (cleanup->arg); |
| |
| } |
| |
| pthread_setspecific (ptw32_cleanupKey, (void *) cleanup->prev); |
| |
| } |
| |
| return (cleanup); |
| |
| } /* ptw32_pop_cleanup */ |
| |
| |
| void |
| ptw32_push_cleanup (ptw32_cleanup_t * cleanup, |
| ptw32_cleanup_callback_t routine, void *arg) |
| /* |
| * ------------------------------------------------------ |
| * DOCPUBLIC |
| * This function pushes a new cleanup handler onto the thread's stack |
| * of cleanup handlers. Each cleanup handler pushed onto the stack is |
| * popped and invoked with the argument 'arg' when |
| * a) the thread exits by calling 'pthread_exit', |
| * b) when the thread acts on a cancellation request, |
| * c) or when the thread calls pthread_cleanup_pop with a nonzero |
| * 'execute' argument |
| * |
| * PARAMETERS |
| * cleanup |
| * a pointer to an instance of pthread_cleanup_t, |
| * |
| * routine |
| * pointer to a cleanup handler, |
| * |
| * arg |
| * parameter to be passed to the cleanup handler |
| * |
| * |
| * DESCRIPTION |
| * This function pushes a new cleanup handler onto the thread's stack |
| * of cleanup handlers. Each cleanup handler pushed onto the stack is |
| * popped and invoked with the argument 'arg' when |
| * a) the thread exits by calling 'pthread_exit', |
| * b) when the thread acts on a cancellation request, |
| * c) or when the thrad calls pthread_cleanup_pop with a nonzero |
| * 'execute' argument |
| * NOTE: pthread_push_cleanup, ptw32_pop_cleanup must be paired |
| * in the same lexical scope. |
| * |
| * RESULTS |
| * pthread_cleanup_t * |
| * pointer to the previous cleanup |
| * |
| * ------------------------------------------------------ |
| */ |
| { |
| cleanup->routine = routine; |
| cleanup->arg = arg; |
| |
| cleanup->prev = (ptw32_cleanup_t *) pthread_getspecific (ptw32_cleanupKey); |
| |
| pthread_setspecific (ptw32_cleanupKey, (void *) cleanup); |
| |
| } /* ptw32_push_cleanup */ |