1 | /* Copyright (C) 2002-2016 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
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 | #include <semaphore.h> |
20 | #include "pthreadP.h" |
21 | |
22 | #define SEM_SHM_PREFIX "sem." |
23 | |
24 | /* Keeping track of currently used mappings. */ |
25 | struct inuse_sem |
26 | { |
27 | dev_t dev; |
28 | ino_t ino; |
29 | int refcnt; |
30 | sem_t *sem; |
31 | char name[0]; |
32 | }; |
33 | |
34 | |
35 | /* The search tree for existing mappings. */ |
36 | extern void *__sem_mappings attribute_hidden; |
37 | |
38 | /* Lock to protect the search tree. */ |
39 | extern int __sem_mappings_lock attribute_hidden; |
40 | |
41 | |
42 | /* Comparison function for search in tree with existing mappings. */ |
43 | extern int __sem_search (const void *a, const void *b) attribute_hidden; |
44 | |
45 | |
46 | /* Prototypes of functions with multiple interfaces. */ |
47 | extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value); |
48 | extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value); |
49 | extern int __new_sem_destroy (sem_t *sem); |
50 | extern int __new_sem_post (sem_t *sem); |
51 | extern int __new_sem_wait (sem_t *sem); |
52 | extern int __old_sem_wait (sem_t *sem); |
53 | extern int __new_sem_trywait (sem_t *sem); |
54 | extern int __new_sem_getvalue (sem_t *sem, int *sval); |
55 | |