lib/libthr/thread/thr_clean.c

   1 /*
   2  * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 #include "namespace.h"
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include <stdlib.h>
  36 #include <pthread.h>
  37 #include "un-namespace.h"
  38
  39 #include "thr_private.h"
  40
  41 #undef pthread_cleanup_push
  42 #undef pthread_cleanup_pop
  43
  44 /* old binary compatible interfaces */
  45 __weak_reference(_pthread_cleanup_push, pthread_cleanup_push);
  46 __weak_reference(_pthread_cleanup_pop, pthread_cleanup_pop);
  47
  48 void
  49 __pthread_cleanup_push_imp(void (*routine)(void *), void *arg,
  50         struct _pthread_cleanup_info *info)
  51 {
  52         struct pthread  *curthread = _get_curthread();
  53         struct pthread_cleanup *newbuf;
  54
  55         newbuf = (void *)info;
  56         newbuf->routine = routine;
  57         newbuf->routine_arg = arg;
  58         newbuf->onheap = 0;
  59         newbuf->prev = curthread->cleanup;
  60         curthread->cleanup = newbuf;
  61 }
  62
  63 void
  64 __pthread_cleanup_pop_imp(int execute)
  65 {
  66         struct pthread  *curthread = _get_curthread();
  67         struct pthread_cleanup *old;
  68
  69         if ((old = curthread->cleanup) != NULL) {
  70                 curthread->cleanup = old->prev;
  71                 if (execute)
  72                         old->routine(old->routine_arg);
  73                 if (old->onheap)
  74                         free(old);
  75         }
  76 }
  77
  78 void
  79 _pthread_cleanup_push(void (*routine) (void *), void *arg)
  80 {
  81         struct pthread  *curthread = _get_curthread();
  82         struct pthread_cleanup *newbuf;
  83 #ifdef _PTHREAD_FORCED_UNWIND
  84         curthread->unwind_disabled = 1;
  85 #endif
  86         if ((newbuf = (struct pthread_cleanup *)
  87             malloc(sizeof(struct _pthread_cleanup_info))) != NULL) {
  88                 newbuf->routine = routine;
  89                 newbuf->routine_arg = arg;
  90                 newbuf->onheap = 1;
  91                 newbuf->prev = curthread->cleanup;
  92                 curthread->cleanup = newbuf;
  93         }
  94 }
  95
  96 void
  97 _pthread_cleanup_pop(int execute)
  98 {
  99         __pthread_cleanup_pop_imp(execute);
 100 }