mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 09:30:06 +00:00
90e97b3720
And libc-lockP.h. This is no longer used because all internal TLS use goes directly to the thread descriptor/TCB or uses ELF TLS.
129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/* libc-internal interface for mutex locks. Stub version.
|
|
Copyright (C) 1996-2021 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _LIBC_LOCK_H
|
|
#define _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
|
|
|
|
#endif /* libc-lock.h */
|