1/* Copyright (C) 2002-2020 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 <https://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. */
25struct 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. */
36extern void *__sem_mappings attribute_hidden;
37
38/* Lock to protect the search tree. */
39extern int __sem_mappings_lock attribute_hidden;
40
41
42/* Comparison function for search in tree with existing mappings. */
43extern int __sem_search (const void *a, const void *b) attribute_hidden;
44
45
46/* Prototypes of functions with multiple interfaces. */
47extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
48extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
49extern int __new_sem_destroy (sem_t *sem);
50extern int __new_sem_post (sem_t *sem);
51extern int __new_sem_wait (sem_t *sem);
52extern int __old_sem_wait (sem_t *sem);
53extern int __new_sem_trywait (sem_t *sem);
54extern int __new_sem_getvalue (sem_t *sem, int *sval);
55