sysdeps/htl/bits/cancelation.h

   1 /* Cancelation.  Generic version.
   2    Copyright (C) 2002-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _BITS_CANCELATION_H
  20 #define _BITS_CANCELATION_H     1
  21
  22 struct __pthread_cancelation_handler
  23 {
  24   void (*__handler) (void *);
  25   void *__arg;
  26   struct __pthread_cancelation_handler *__next;
  27 };
  28
  29 /* Returns the thread local location of the cleanup handler stack.  */
  30 struct __pthread_cancelation_handler **__pthread_get_cleanup_stack (void);
  31
  32 #define __pthread_cleanup_push(rt, rtarg) \
  33         { \
  34           struct __pthread_cancelation_handler **__handlers \
  35             = __pthread_get_cleanup_stack (); \
  36           struct __pthread_cancelation_handler __handler = \
  37             { \
  38               (rt), \
  39               (rtarg), \
  40               *__handlers \
  41             }; \
  42           *__handlers = &__handler;
  43
  44 #define __pthread_cleanup_pop(execute) \
  45           if (execute) \
  46             __handler.__handler (__handler.__arg); \
  47           *__handlers = __handler.__next; \
  48         }
  49
  50 #endif /* _BITS_CANCELATION_H */