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69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* Copyright (C) 2002, 2003, 2006, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <semaphore.h>
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#include "pthreadP.h"
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/* Mount point of the shared memory filesystem. */
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struct mountpoint_info
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{
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char *dir;
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size_t dirlen;
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};
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/* Keeping track of currently used mappings. */
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struct inuse_sem
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{
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dev_t dev;
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ino_t ino;
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int refcnt;
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sem_t *sem;
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char name[0];
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};
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/* Variables used in multiple interfaces. */
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extern struct mountpoint_info mountpoint attribute_hidden;
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extern pthread_once_t __namedsem_once attribute_hidden;
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/* The search tree for existing mappings. */
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extern void *__sem_mappings attribute_hidden;
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/* Lock to protect the search tree. */
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extern int __sem_mappings_lock attribute_hidden;
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/* Initializer for mountpoint. */
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extern void __where_is_shmfs (void) attribute_hidden;
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/* Comparison function for search in tree with existing mappings. */
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extern int __sem_search (const void *a, const void *b) attribute_hidden;
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/* Prototypes of functions with multiple interfaces. */
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extern int __new_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __old_sem_init (sem_t *sem, int pshared, unsigned int value);
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extern int __new_sem_destroy (sem_t *sem);
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extern int __new_sem_post (sem_t *sem);
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extern int __new_sem_wait (sem_t *sem);
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extern int __old_sem_wait (sem_t *sem);
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extern int __new_sem_trywait (sem_t *sem);
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extern int __new_sem_getvalue (sem_t *sem, int *sval);
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