linuxthreads/ptcleanup.c

   1 /* Linuxthreads - a simple clone()-based implementation of Posix        */
   2 /* threads for Linux.                                                   */
   3 /* Copyright (C) 1998, 2004 Xavier Leroy (Xavier.Leroy@inria.fr)        */
   4 /*                                                                      */
   5 /* This program is free software; you can redistribute it and/or        */
   6 /* modify it under the terms of the GNU Library General Public License  */
   7 /* as published by the Free Software Foundation; either version 2       */
   8 /* of the License, or (at your option) any later version.               */
   9 /*                                                                      */
  10 /* This program is distributed in the hope that it will be useful,      */
  11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of       */
  12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        */
  13 /* GNU Library General Public License for more details.                 */
  14
  15 /* Redefine siglongjmp and longjmp so that they interact correctly
  16    with cleanup handlers */
  17
  18 #include <setjmp.h>
  19 #include "pthread.h"
  20 #include "internals.h"
  21
  22 void __pthread_cleanup_upto (__jmp_buf target, char *targetframe)
  23 {
  24   pthread_descr self = thread_self();
  25   struct _pthread_cleanup_buffer * c;
  26
  27   for (c = THREAD_GETMEM(self, p_cleanup);
  28        c != NULL && _JMPBUF_UNWINDS(target, c);
  29        c = c->__prev)
  30     {
  31 #if _STACK_GROWS_DOWN
  32       if ((char *) c <= targetframe)
  33         {
  34           c = NULL;
  35           break;
  36         }
  37 #elif _STACK_GROWS_UP
  38       if ((char *) c >= targetframe)
  39         {
  40           c = NULL;
  41           break;
  42         }
  43 #else
  44 # error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
  45 #endif
  46       c->__routine(c->__arg);
  47     }
  48   THREAD_SETMEM(self, p_cleanup, c);
  49   if (THREAD_GETMEM(self, p_in_sighandler)
  50       && _JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler)))
  51     THREAD_SETMEM(self, p_in_sighandler, NULL);
  52 }