1/* Copyright (C) 2002-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 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 <futex-internal.h>
21#include "pthreadP.h"
22
23#define SEM_SHM_PREFIX "sem."
24
25static inline void __new_sem_open_init (struct new_sem *sem, unsigned value)
26{
27#if __HAVE_64B_ATOMICS
28 sem->data = value;
29#else
30 sem->value = value << SEM_VALUE_SHIFT;
31 sem->nwaiters = 0;
32#endif
33 /* pad is used as a mutex on pre-v9 sparc and ignored otherwise. */
34 sem->pad = 0;
35
36 /* This always is a shared semaphore. */
37 sem->private = FUTEX_SHARED;
38}
39
40/* Prototypes of functions with multiple interfaces. */
41extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
42extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
43extern int __new_sem_destroy (sem_t *sem);
44extern int __new_sem_post (sem_t *sem);
45extern int __new_sem_wait (sem_t *sem);
46extern int __old_sem_wait (sem_t *sem);
47extern int __new_sem_trywait (sem_t *sem);
48extern int __new_sem_getvalue (sem_t *sem, int *sval);
49
50#if __TIMESIZE == 64
51# define __sem_clockwait64 __sem_clockwait
52# define __sem_timedwait64 __sem_timedwait
53#else
54extern int
55__sem_clockwait64 (sem_t *sem, clockid_t clockid,
56 const struct __timespec64 *abstime);
57libc_hidden_proto (__sem_clockwait64)
58extern int
59__sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime);
60libc_hidden_proto (__sem_timedwait64)
61#endif
62