1 /* Cancelation.  Generic version.
2    Copyright (C) 2002-2022 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    <https://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 */
51