mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-20 12:00:06 +00:00
61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
|
/* libc-internal interface for mutex locks. Mach cthreads version.
|
||
|
|
Copyright (C) 1996 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 Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
||
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||
|
|
Cambridge, MA 02139, USA. */
|
||
|
|
|
||
|
|
#ifndef _LIBC_LOCK_H
|
||
|
|
#define _LIBC_LOCK_H 1
|
||
|
|
|
||
|
|
#ifdef _LIBC
|
||
|
|
#include <cthreads.h>
|
||
|
|
#define __libc_lock_t struct mutex
|
||
|
|
#else
|
||
|
|
typedef struct __libc_lock_opaque__ __libc_lock_t;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* 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, the lock element must come last, because its storage size
|
||
|
|
will not be known outside of libc. (Or you can use a pointer to the
|
||
|
|
lock structure; i.e. NAME begins with a `*'.) */
|
||
|
|
#define __libc_lock_define(CLASS,NAME)
|
||
|
|
CLASS __libc_lock_t NAME;
|
||
|
|
|
||
|
|
/* Define an initialized lock variable NAME with storage class CLASS. */
|
||
|
|
#define __libc_lock_define_initialized(CLASS,NAME) \
|
||
|
|
CLASS __libc_lock_t NAME = MUTEX_INITIALIZER;
|
||
|
|
|
||
|
|
/* Initialize the named lock variable, leaving it in a consistent, unlocked
|
||
|
|
state. */
|
||
|
|
#define __libc_lock_init(NAME) __mutex_init (&(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) __mutex_unlock (&(NAME))
|
||
|
|
|
||
|
|
/* Lock the named lock variable. */
|
||
|
|
#define __libc_lock_lock(NAME) __mutex_lock (&(NAME))
|
||
|
|
|
||
|
|
/* Unlock the named lock variable. */
|
||
|
|
#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* libc-lock.h */
|