mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +00:00
fddfebbd10
2003-05-17 Ulrich Drepper <drepper@redhat.com> * sem_open.c: Fix one endless loop. Implement correct semantics wrt opening the same semaphore more then once. * sem_close.c: Adjust for sem_open change. * semaphoreP.h: Include <semaphore.h>. Define struct inuse_sem. Declare __sem_mappings, __sem_mappings_lock, __sem_search. * Makefile (tests): Add tst-sem7. * tst-sem7.c: New file.
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/* Copyright (C) 2002, 2003 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <semaphore.h>
|
|
#include "pthreadP.h"
|
|
|
|
|
|
/* Mount point of the shared memory filesystem. */
|
|
struct mountpoint_info
|
|
{
|
|
char *dir;
|
|
size_t dirlen;
|
|
};
|
|
|
|
/* Keeping track of currently used mappings. */
|
|
struct inuse_sem
|
|
{
|
|
dev_t dev;
|
|
ino_t ino;
|
|
int refcnt;
|
|
sem_t *sem;
|
|
char name[0];
|
|
};
|
|
|
|
|
|
/* Variables used in multiple interfaces. */
|
|
extern struct mountpoint_info mountpoint attribute_hidden;
|
|
|
|
extern pthread_once_t __namedsem_once attribute_hidden;
|
|
|
|
/* The search tree for existing mappings. */
|
|
extern void *__sem_mappings attribute_hidden;
|
|
|
|
/* Lock to protect the search tree. */
|
|
extern lll_lock_t __sem_mappings_lock;
|
|
|
|
|
|
/* Initializer for mountpoint. */
|
|
extern void __where_is_shmfs (void) 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 __new_sem_destroy (sem_t *sem);
|
|
extern int __new_sem_post (sem_t *sem);
|
|
extern int __new_sem_wait (sem_t *sem);
|
|
extern int __new_sem_trywait (sem_t *sem);
|
|
extern int __new_sem_getvalue (sem_t *sem, int *sval);
|