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Diffstat (limited to 'include/asm-xtensa/semaphore.h')
| -rw-r--r-- | include/asm-xtensa/semaphore.h | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/include/asm-xtensa/semaphore.h b/include/asm-xtensa/semaphore.h deleted file mode 100644 index c8a7574a9a5..00000000000 --- a/include/asm-xtensa/semaphore.h +++ /dev/null @@ -1,129 +0,0 @@ -/* - * linux/include/asm-xtensa/semaphore.h - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2001 - 2005 Tensilica Inc. - */ - -#ifndef _XTENSA_SEMAPHORE_H -#define _XTENSA_SEMAPHORE_H - -#include <asm/atomic.h> -#include <asm/system.h> -#include <linux/wait.h> -#include <linux/rwsem.h> - -struct semaphore { - atomic_t count; - int sleepers; - wait_queue_head_t wait; -#if WAITQUEUE_DEBUG - long __magic; -#endif -}; - -#if WAITQUEUE_DEBUG -# define __SEM_DEBUG_INIT(name) \ - , (int)&(name).__magic -#else -# define __SEM_DEBUG_INIT(name) -#endif - -#define __SEMAPHORE_INITIALIZER(name,count) \ - { ATOMIC_INIT(count), \ - 0, \ - __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \ - __SEM_DEBUG_INIT(name) } - -#define __MUTEX_INITIALIZER(name) \ - __SEMAPHORE_INITIALIZER(name, 1) - -#define __DECLARE_SEMAPHORE_GENERIC(name,count) \ - struct semaphore name = __SEMAPHORE_INITIALIZER(name,count) - -#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1) -#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name,0) - -extern inline void sema_init (struct semaphore *sem, int val) -{ -/* - * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val); - * - * i'd rather use the more flexible initialization above, but sadly - * GCC 2.7.2.3 emits a bogus warning. EGCS doesnt. Oh well. - */ - atomic_set(&sem->count, val); - init_waitqueue_head(&sem->wait); -#if WAITQUEUE_DEBUG - sem->__magic = (int)&sem->__magic; -#endif -} - -static inline void init_MUTEX (struct semaphore *sem) -{ - sema_init(sem, 1); -} - -static inline void init_MUTEX_LOCKED (struct semaphore *sem) -{ - sema_init(sem, 0); -} - -asmlinkage void __down(struct semaphore * sem); -asmlinkage int __down_interruptible(struct semaphore * sem); -asmlinkage int __down_trylock(struct semaphore * sem); -asmlinkage void __up(struct semaphore * sem); - -extern spinlock_t semaphore_wake_lock; - -extern __inline__ void down(struct semaphore * sem) -{ -#if WAITQUEUE_DEBUG - CHECK_MAGIC(sem->__magic); -#endif - - if (atomic_sub_return(1, &sem->count) < 0) - __down(sem); -} - -extern __inline__ int down_interruptible(struct semaphore * sem) -{ - int ret = 0; -#if WAITQUEUE_DEBUG - CHECK_MAGIC(sem->__magic); -#endif - - if (atomic_sub_return(1, &sem->count) < 0) - ret = __down_interruptible(sem); - return ret; -} - -extern __inline__ int down_trylock(struct semaphore * sem) -{ - int ret = 0; -#if WAITQUEUE_DEBUG - CHECK_MAGIC(sem->__magic); -#endif - - if (atomic_sub_return(1, &sem->count) < 0) - ret = __down_trylock(sem); - return ret; -} - -/* - * Note! This is subtle. We jump to wake people up only if - * the semaphore was negative (== somebody was waiting on it). - */ -extern __inline__ void up(struct semaphore * sem) -{ -#if WAITQUEUE_DEBUG - CHECK_MAGIC(sem->__magic); -#endif - if (atomic_add_return(1, &sem->count) <= 0) - __up(sem); -} - -#endif /* _XTENSA_SEMAPHORE_H */ |
