/* Copyright (C) 2002, 2003, 2006, 2007 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 int __sem_mappings_lock attribute_hidden; /* 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 __old_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 __old_sem_wait (sem_t *sem); extern int __new_sem_trywait (sem_t *sem); extern int __new_sem_getvalue (sem_t *sem, int *sval);