blob: 1bdaeabdfa8d685a982ba20320ae8e6776998e69 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* Copyright (C) 2002-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <semaphore.h>
#include "pthreadP.h"
#define SEM_SHM_PREFIX "sem."
/* Keeping track of currently used mappings. */
struct inuse_sem
{
dev_t dev;
ino_t ino;
int refcnt;
sem_t *sem;
char name[0];
};
/* The search tree for existing mappings. */
extern void *__sem_mappings attribute_hidden;
/* Lock to protect the search tree. */
extern int __sem_mappings_lock attribute_hidden;
/* Comparison function for search in tree with existing mappings. */
extern int __sem_search (const void *a, const void *b) attribute_hidden;
/* Prototypes of functions with multiple interfaces. */
extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
extern int __new_sem_destroy (sem_t *sem);
extern int __new_sem_post (sem_t *sem);
extern int __new_sem_wait (sem_t *sem);
extern int __old_sem_wait (sem_t *sem);
extern int __new_sem_trywait (sem_t *sem);
extern int __new_sem_getvalue (sem_t *sem, int *sval);
|
