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581c785b 1/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
76a50749 2 This file is part of the GNU C Library.
9459fe9d 3 Ulrich Drepper <drepper@redhat.com>, 2002.
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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
59ba27a6 16 License along with the GNU C Library; if not, see
5a82c748 17 <https://www.gnu.org/licenses/>. */
76a50749 18
fddfebbd 19#include <semaphore.h>
a28296e7 20#include <futex-internal.h>
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21#include "pthreadP.h"
22
e4f639e4 23#define SEM_SHM_PREFIX "sem."
76a50749 24
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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}
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39
40/* Prototypes of functions with multiple interfaces. */
41extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
3d2dd6ca 42extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
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43extern int __new_sem_destroy (sem_t *sem);
44extern int __new_sem_post (sem_t *sem);
45extern int __new_sem_wait (sem_t *sem);
3d2dd6ca 46extern int __old_sem_wait (sem_t *sem);
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47extern int __new_sem_trywait (sem_t *sem);
48extern int __new_sem_getvalue (sem_t *sem, int *sval);
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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);
19cc20ef 57libc_hidden_proto (__sem_clockwait64)
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58extern int
59__sem_timedwait64 (sem_t *sem, const struct __timespec64 *abstime);
018c75dc 60libc_hidden_proto (__sem_timedwait64)
b8d3e8fb 61#endif