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
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include "namespace.h"
  34 #include <signal.h>
  35 #include <errno.h>
  36 #include <stdlib.h>
  37 #include <pthread.h>
  38 #include "un-namespace.h"
  39
  40 #include "thr_private.h"
  41
  42 #undef pthread_cleanup_push
  43 #undef pthread_cleanup_pop
  44
  45 /* old binary compatible interfaces */
  46 __weak_reference(_pthread_cleanup_push, pthread_cleanup_push);
  47 __weak_reference(_pthread_cleanup_pop, pthread_cleanup_pop);
  48
  49 void
  50 __pthread_cleanup_push_imp(void (*routine)(void *), void *arg,
  51         struct _pthread_cleanup_info *info)
  52 {
  53         struct pthread  *curthread = _get_curthread();
  54         struct pthread_cleanup *newbuf;
  55
  56         newbuf = (void *)info;
  57         newbuf->routine = routine;
  58         newbuf->routine_arg = arg;
  59         newbuf->onheap = 0;
  60         newbuf->prev = curthread->cleanup;
  61         curthread->cleanup = newbuf;
  62 }
  63
  64 void
  65 __pthread_cleanup_pop_imp(int execute)
  66 {
  67         struct pthread  *curthread = _get_curthread();
  68         struct pthread_cleanup *old;
  69
  70         if ((old = curthread->cleanup) != NULL) {
  71                 curthread->cleanup = old->prev;
  72                 if (execute)
  73                         old->routine(old->routine_arg);
  74                 if (old->onheap)
  75                         free(old);
  76         }
  77 }
  78
  79 void
  80 _pthread_cleanup_push(void (*routine) (void *), void *arg)
  81 {
  82         struct pthread  *curthread = _get_curthread();
  83         struct pthread_cleanup *newbuf;
  84 #ifdef _PTHREAD_FORCED_UNWIND
  85         curthread->unwind_disabled = 1;
  86 #endif
  87         if ((newbuf = (struct pthread_cleanup *)
  88             malloc(sizeof(struct pthread_cleanup))) != NULL) {
  89                 newbuf->routine = routine;
  90                 newbuf->routine_arg = arg;
  91                 newbuf->onheap = 1;
  92                 newbuf->prev = curthread->cleanup;
  93                 curthread->cleanup = newbuf;
  94         }
  95 }
  96
  97 void
  98 _pthread_cleanup_pop(int execute)
  99 {
 100         __pthread_cleanup_pop_imp(execute);
 101 }