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/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <semaphore.h>
#include "pt-internal.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[];
};
/* 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;
static inline void __new_sem_open_init (struct new_sem *sem, unsigned value)
{
/* This always is a shared semaphore. */
*sem = (struct new_sem) __SEMAPHORE_INITIALIZER (1, value);
}
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