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Diffstat (limited to 'sysdeps/mach/hurd/libc-lock.h')
| -rw-r--r-- | sysdeps/mach/hurd/libc-lock.h | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/sysdeps/mach/hurd/libc-lock.h b/sysdeps/mach/hurd/libc-lock.h deleted file mode 100644 index f5a1f66a23..0000000000 --- a/sysdeps/mach/hurd/libc-lock.h +++ /dev/null @@ -1,216 +0,0 @@ -/* libc-internal interface for mutex locks. Hurd version using Mach cthreads. - Copyright (C) 1996-2018 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 _LIBC_LOCK_H -#define _LIBC_LOCK_H 1 - -#if (_LIBC - 0) || (_CTHREADS_ - 0) -#include <cthreads.h> - -/* The locking here is very inexpensive, even for inlining. */ -#define _IO_lock_inexpensive 1 - -typedef struct mutex __libc_lock_t; -typedef struct -{ - struct mutex mutex; - void *owner; - int count; -} __libc_lock_recursive_t; -typedef __libc_lock_recursive_t __rtld_lock_recursive_t; - -extern char __libc_lock_self0[0]; -#define __libc_lock_owner_self() (__LIBC_NO_TLS () ? &__libc_lock_self0 : THREAD_SELF) - -#else -typedef struct __libc_lock_opaque__ __libc_lock_t; -typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_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 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_INITIALIZER MUTEX_INITIALIZER -#define __libc_lock_define_initialized(CLASS,NAME) \ - CLASS __libc_lock_t NAME = _LIBC_LOCK_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)) -#define __libc_lock_fini_recursive(NAME) __mutex_unlock (&(NAME).mutex) -#define __rtld_lock_fini_recursive(NAME) __mutex_unlock (&(NAME).mutex) - - -/* Lock the named lock variable. */ -#define __libc_lock_lock(NAME) __mutex_lock (&(NAME)) - -/* Lock the named lock variable. */ -#define __libc_lock_trylock(NAME) (!__mutex_trylock (&(NAME))) - -/* Unlock the named lock variable. */ -#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME)) - - -#define __libc_lock_define_recursive(CLASS,NAME) \ - CLASS __libc_lock_recursive_t NAME; -#define _LIBC_LOCK_RECURSIVE_INITIALIZER { MUTEX_INITIALIZER, 0, 0 } -#define __libc_lock_define_initialized_recursive(CLASS,NAME) \ - CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER; - -#define __rtld_lock_define_recursive(CLASS,NAME) \ - __libc_lock_define_recursive (CLASS, NAME) -#define _RTLD_LOCK_RECURSIVE_INITIALIZER \ - _LIBC_LOCK_RECURSIVE_INITIALIZER -#define __rtld_lock_define_initialized_recursive(CLASS,NAME) \ - __libc_lock_define_initialized_recursive (CLASS, NAME) - -#define __libc_lock_init_recursive(NAME) \ - ({ __libc_lock_recursive_t *const __lock = &(NAME); \ - __lock->owner = 0; mutex_init (&__lock->mutex); }) - -#define __libc_lock_trylock_recursive(NAME) \ - ({ __libc_lock_recursive_t *const __lock = &(NAME); \ - void *__self = __libc_lock_owner_self (); \ - __mutex_trylock (&__lock->mutex) \ - ? (__lock->owner = __self, __lock->count = 1, 0) \ - : __lock->owner == __self ? (++__lock->count, 0) : 1; }) - -#define __libc_lock_lock_recursive(NAME) \ - ({ __libc_lock_recursive_t *const __lock = &(NAME); \ - void *__self = __libc_lock_owner_self (); \ - if (__mutex_trylock (&__lock->mutex) \ - || (__lock->owner != __self \ - && (__mutex_lock (&__lock->mutex), 1))) \ - __lock->owner = __self, __lock->count = 1; \ - else \ - ++__lock->count; \ - }) -#define __libc_lock_unlock_recursive(NAME) \ - ({ __libc_lock_recursive_t *const __lock = &(NAME); \ - if (--__lock->count == 0) \ - { \ - __lock->owner = 0; \ - __mutex_unlock (&__lock->mutex); \ - } \ - }) - - -#define __rtld_lock_initialize(NAME) \ - (void) ((NAME) = (__rtld_lock_recursive_t) _RTLD_LOCK_RECURSIVE_INITIALIZER) -#define __rtld_lock_trylock_recursive(NAME) \ - __libc_lock_trylock_recursive (NAME) -#define __rtld_lock_lock_recursive(NAME) \ - __libc_lock_lock_recursive(NAME) -#define __rtld_lock_unlock_recursive(NAME) \ - __libc_lock_unlock_recursive (NAME) - - -/* XXX for now */ -#define __libc_rwlock_define __libc_lock_define -#define __libc_rwlock_define_initialized __libc_lock_define_initialized -#define __libc_rwlock_init __libc_lock_init -#define __libc_rwlock_fini __libc_lock_fini -#define __libc_rwlock_rdlock __libc_lock_lock -#define __libc_rwlock_wrlock __libc_lock_lock -#define __libc_rwlock_tryrdlock __libc_lock_trylock -#define __libc_rwlock_trywrlock __libc_lock_trylock -#define __libc_rwlock_unlock __libc_lock_unlock - - -/* 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) - -#if (_CTHREADS_ - 0) - -/* Use mutexes as once control variables. */ - -struct __libc_once - { - __libc_lock_t lock; - int done; - }; - -#define __libc_once_define(CLASS,NAME) \ - CLASS struct __libc_once NAME = { MUTEX_INITIALIZER, 0 } - -/* Call handler iff the first call. */ -#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ - do { \ - __libc_lock_lock (ONCE_CONTROL.lock); \ - if (!ONCE_CONTROL.done) \ - (INIT_FUNCTION) (); \ - ONCE_CONTROL.done = 1; \ - __libc_lock_unlock (ONCE_CONTROL.lock); \ - } while (0) - -/* Get once control variable. */ -#define __libc_once_get(ONCE_CONTROL) ((ONCE_CONTROL).done != 0) - -#ifdef _LIBC -/* We need portable names for some functions. E.g., when they are - used as argument to __libc_cleanup_region_start. */ -#define __libc_mutex_unlock __mutex_unlock -#endif - -/* Type for key of thread specific data. */ -typedef cthread_key_t __libc_key_t; - -#define __libc_key_create(KEY,DEST) __cthread_keycreate (KEY) -#define __libc_setspecific(KEY,VAL) __cthread_setspecific (KEY, VAL) -void *__libc_getspecific (__libc_key_t key); - -#endif /* _CTHREADS_ */ - -/* Hide the definitions which are only supposed to be used inside libc in - a separate file. This file is not present in the installation! */ -#ifdef _LIBC -# include <libc-lockP.h> -#endif - -#endif /* libc-lock.h */ |