/* libc-internal interface for mutex locks. Stub version. Copyright (C) 1996-2013 Free Software Foundation, Inc. This file is part of the GNU C Library. 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 <http://www.gnu.org/licenses/>. */ #ifndef _BITS_LIBC_LOCK_H #define _BITS_LIBC_LOCK_H 1 /* Define a lock variable NAME with storage class CLASS. The lock must be initialized with __libc_lock_init before it can be used (or define it with __libc_lock_define_initialized, below). Use `extern' for CLASS to declare a lock defined in another module. In public structure definitions you must use a pointer to the lock structure (i.e., NAME begins with a `*'), because its storage size will not be known outside of libc. */ #define __libc_lock_define(CLASS,NAME) #define __libc_lock_define_recursive(CLASS,NAME) #define __rtld_lock_define_recursive(CLASS,NAME) #define __libc_rwlock_define(CLASS,NAME) /* Define an initialized lock variable NAME with storage class CLASS. */ #define __libc_lock_define_initialized(CLASS,NAME) #define __libc_rwlock_define_initialized(CLASS,NAME) /* Define an initialized recursive lock variable NAME with storage class CLASS. */ #define __libc_lock_define_initialized_recursive(CLASS,NAME) #define __rtld_lock_define_initialized_recursive(CLASS,NAME) /* Initialize the named lock variable, leaving it in a consistent, unlocked state. */ #define __libc_lock_init(NAME) #define __rtld_lock_initialize(NAME) #define __libc_rwlock_init(NAME) /* Same as last but this time we initialize a recursive mutex. */ #define __libc_lock_init_recursive(NAME) /* Finalize the named lock variable, which must be locked. It cannot be used again until __libc_lock_init is called again on it. This must be called on a lock variable before the containing storage is reused. */ #define __libc_lock_fini(NAME) #define __libc_rwlock_fini(NAME) /* Finalize recursive named lock. */ #define __libc_lock_fini_recursive(NAME) /* Lock the named lock variable. */ #define __libc_lock_lock(NAME) #define __libc_rwlock_rdlock(NAME) #define __libc_rwlock_wrlock(NAME) /* Lock the recursive named lock variable. */ #define __libc_lock_lock_recursive(NAME) #define __rtld_lock_lock_recursive(NAME) /* Try to lock the named lock variable. */ #define __libc_lock_trylock(NAME) 0 #define __libc_rwlock_tryrdlock(NAME) 0 #define __libc_rwlock_trywrlock(NAME) 0 /* Try to lock the recursive named lock variable. */ #define __libc_lock_trylock_recursive(NAME) 0 /* Unlock the named lock variable. */ #define __libc_lock_unlock(NAME) #define __libc_rwlock_unlock(NAME) /* Unlock the recursive named lock variable. */ #define __libc_lock_unlock_recursive(NAME) #define __rtld_lock_unlock_recursive(NAME) /* Define once control variable. */ #define __libc_once_define(CLASS, NAME) CLASS int NAME = 0 /* Call handler iff the first call. */ #define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ do { \ if ((ONCE_CONTROL) == 0) { \ INIT_FUNCTION (); \ (ONCE_CONTROL) = 1; \ } \ } while (0) /* Get once control variable. */ #define __libc_once_get(ONCE_CONTROL) \ ((ONCE_CONTROL) == 1) /* Start a critical region with a cleanup function */ #define __libc_cleanup_region_start(DOIT, FCT, ARG) \ { \ typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \ typeof (ARG) __save_ARG = ARG; \ /* close brace is in __libc_cleanup_region_end below. */ /* End a critical region started with __libc_cleanup_region_start. */ #define __libc_cleanup_region_end(DOIT) \ if ((DOIT) && __save_FCT != 0) \ (*__save_FCT)(__save_ARG); \ } /* Sometimes we have to exit the block in the middle. */ #define __libc_cleanup_end(DOIT) \ if ((DOIT) && __save_FCT != 0) \ (*__save_FCT)(__save_ARG); \ #define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg) #define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute) /* We need portable names for some of the functions. */ #define __libc_mutex_unlock /* Type for key of thread specific data. */ typedef int __libc_key_t; /* Create key for thread specific data. */ #define __libc_key_create(KEY,DEST) ((void) (KEY), (void) (DEST), -1) /* Set thread-specific data associated with KEY to VAL. */ #define __libc_setspecific(KEY,VAL) ((void) (KEY), (void) (VAL)) /* Get thread-specific data associated with KEY. */ #define __libc_getspecific(KEY) ((void) (KEY), (void *) 0) #endif /* bits/libc-lock.h */