diff options
Diffstat (limited to 'gnu/egcs/libio/config/linuxaxp1-libc-lock.h')
| -rw-r--r-- | gnu/egcs/libio/config/linuxaxp1-libc-lock.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/gnu/egcs/libio/config/linuxaxp1-libc-lock.h b/gnu/egcs/libio/config/linuxaxp1-libc-lock.h new file mode 100644 index 00000000000..2523a0d5157 --- /dev/null +++ b/gnu/egcs/libio/config/linuxaxp1-libc-lock.h @@ -0,0 +1,112 @@ +/* libc-internal interface for mutex locks. LinuxThreads 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _LIBC_LOCK_H +#define _LIBC_LOCK_H 1 + +#include <pthread.h> +#define __libc_lock_t pthread_mutex_t + +/* 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) \ + 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 = PTHREAD_MUTEX_INITIALIZER; + +/* Initialize the named lock variable, leaving it in a consistent, unlocked + state. */ +#define __libc_lock_init(NAME) \ + (__pthread_mutex_init != NULL ? __pthread_mutex_init (&(NAME), NULL) : 0); + +/* Same as last but this time we initialize a recursive mutex. */ +#define __libc_lock_init_recursive(NAME) \ + do { \ + if (__pthread_mutex_init != NULL) \ + { \ + pthread_mutexattr_t __attr; \ + __pthread_mutexattr_init (&__attr); \ + __pthread_mutexattr_setkind_np (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \ + __pthread_mutex_init (&(NAME), &__attr); \ + __pthread_mutexattr_destroy (&__attr); \ + } \ + } while (0); + +/* 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) \ + (__pthread_mutex_destroy != NULL ? __pthread_mutex_destroy (&(NAME)) : 0); + +/* Lock the named lock variable. */ +#define __libc_lock_lock(NAME) \ + (__pthread_mutex_lock != NULL ? __pthread_mutex_lock (&(NAME)) : 0); + +/* Try to lock the named lock variable. */ +#define __libc_lock_trylock(NAME) \ + (__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (&(NAME)) : 0); + +/* Unlock the named lock variable. */ +#define __libc_lock_unlock(NAME) \ + (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (&(NAME)) : 0); + +/* Start critical region with cleanup. */ +#define __libc_cleanup_region_start(FCT, ARG) \ + { struct _pthread_cleanup_buffer _buffer; \ + if (_pthread_cleanup_push_defer != NULL) { \ + _pthread_cleanup_push_defer (&_buffer, (FCT), (ARG)); \ + } + +/* End critical region with cleanup. */ +#define __libc_cleanup_region_end(DOIT) \ + if (_pthread_cleanup_push_defer != NULL) { \ + _pthread_cleanup_pop_restore (&_buffer, (DOIT)); \ + } \ + } + +/* Make the pthread functions weak so that we can elide them from + single-threaded processes. */ +#pragma weak __pthread_mutex_init +#pragma weak __pthread_mutex_destroy +#pragma weak __pthread_mutex_lock +#pragma weak __pthread_mutex_trylock +#pragma weak __pthread_mutex_unlock +#pragma weak __pthread_mutexattr_init +#pragma weak __pthread_mutexattr_destroy +#pragma weak __pthread_mutexattr_setkind_np +#pragma weak __pthread_key_create +#pragma weak __pthread_setspecific +#pragma weak __pthread_getspecific +#pragma weak __pthread_initialize +#pragma weak _pthread_cleanup_push_defer +#pragma weak _pthread_cleanup_pop_restore + +/* We need portable names for some functions. E.g., when they are + used as argument to __libc_cleanup_region_start. */ +#define __libc_mutex_unlock __pthread_mutex_unlock + +#endif /* libc-lock.h */ + |