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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/mutex.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/mutex.h')
-rw-r--r-- | ANDROID_3.4.5/include/linux/mutex.h | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/ANDROID_3.4.5/include/linux/mutex.h b/ANDROID_3.4.5/include/linux/mutex.h deleted file mode 100644 index 9121595a..00000000 --- a/ANDROID_3.4.5/include/linux/mutex.h +++ /dev/null @@ -1,176 +0,0 @@ -/* - * Mutexes: blocking mutual exclusion locks - * - * started by Ingo Molnar: - * - * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> - * - * This file contains the main data structure and API definitions. - */ -#ifndef __LINUX_MUTEX_H -#define __LINUX_MUTEX_H - -#include <linux/list.h> -#include <linux/spinlock_types.h> -#include <linux/linkage.h> -#include <linux/lockdep.h> - -#include <linux/atomic.h> - -/* - * Simple, straightforward mutexes with strict semantics: - * - * - only one task can hold the mutex at a time - * - only the owner can unlock the mutex - * - multiple unlocks are not permitted - * - recursive locking is not permitted - * - a mutex object must be initialized via the API - * - a mutex object must not be initialized via memset or copying - * - task may not exit with mutex held - * - memory areas where held locks reside must not be freed - * - held mutexes must not be reinitialized - * - mutexes may not be used in hardware or software interrupt - * contexts such as tasklets and timers - * - * These semantics are fully enforced when DEBUG_MUTEXES is - * enabled. Furthermore, besides enforcing the above rules, the mutex - * debugging code also implements a number of additional features - * that make lock debugging easier and faster: - * - * - uses symbolic names of mutexes, whenever they are printed in debug output - * - point-of-acquire tracking, symbolic lookup of function names - * - list of all locks held in the system, printout of them - * - owner tracking - * - detects self-recursing locks and prints out all relevant info - * - detects multi-task circular deadlocks and prints out all affected - * locks and tasks (and only those tasks) - */ -struct mutex { - /* 1: unlocked, 0: locked, negative: locked, possible waiters */ - atomic_t count; - spinlock_t wait_lock; - struct list_head wait_list; -#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP) - struct task_struct *owner; -#endif -#ifdef CONFIG_DEBUG_MUTEXES - const char *name; - void *magic; -#endif -#ifdef CONFIG_DEBUG_LOCK_ALLOC - struct lockdep_map dep_map; -#endif -}; - -/* - * This is the control structure for tasks blocked on mutex, - * which resides on the blocked task's kernel stack: - */ -struct mutex_waiter { - struct list_head list; - struct task_struct *task; -#ifdef CONFIG_DEBUG_MUTEXES - void *magic; -#endif -}; - -#ifdef CONFIG_DEBUG_MUTEXES -# include <linux/mutex-debug.h> -#else -# define __DEBUG_MUTEX_INITIALIZER(lockname) -/** - * mutex_init - initialize the mutex - * @mutex: the mutex to be initialized - * - * Initialize the mutex to unlocked state. - * - * It is not allowed to initialize an already locked mutex. - */ -# define mutex_init(mutex) \ -do { \ - static struct lock_class_key __key; \ - \ - __mutex_init((mutex), #mutex, &__key); \ -} while (0) -static inline void mutex_destroy(struct mutex *lock) {} -#endif - -#ifdef CONFIG_DEBUG_LOCK_ALLOC -# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \ - , .dep_map = { .name = #lockname } -#else -# define __DEP_MAP_MUTEX_INITIALIZER(lockname) -#endif - -#define __MUTEX_INITIALIZER(lockname) \ - { .count = ATOMIC_INIT(1) \ - , .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \ - , .wait_list = LIST_HEAD_INIT(lockname.wait_list) \ - __DEBUG_MUTEX_INITIALIZER(lockname) \ - __DEP_MAP_MUTEX_INITIALIZER(lockname) } - -#define DEFINE_MUTEX(mutexname) \ - struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) - -extern void __mutex_init(struct mutex *lock, const char *name, - struct lock_class_key *key); - -/** - * mutex_is_locked - is the mutex locked - * @lock: the mutex to be queried - * - * Returns 1 if the mutex is locked, 0 if unlocked. - */ -static inline int mutex_is_locked(struct mutex *lock) -{ - return atomic_read(&lock->count) != 1; -} - -/* - * See kernel/mutex.c for detailed documentation of these APIs. - * Also see Documentation/mutex-design.txt. - */ -#ifdef CONFIG_DEBUG_LOCK_ALLOC -extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass); -extern void _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock); -extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock, - unsigned int subclass); -extern int __must_check mutex_lock_killable_nested(struct mutex *lock, - unsigned int subclass); - -#define mutex_lock(lock) mutex_lock_nested(lock, 0) -#define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0) -#define mutex_lock_killable(lock) mutex_lock_killable_nested(lock, 0) - -#define mutex_lock_nest_lock(lock, nest_lock) \ -do { \ - typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \ - _mutex_lock_nest_lock(lock, &(nest_lock)->dep_map); \ -} while (0) - -#else -extern void mutex_lock(struct mutex *lock); -extern int __must_check mutex_lock_interruptible(struct mutex *lock); -extern int __must_check mutex_lock_killable(struct mutex *lock); - -# define mutex_lock_nested(lock, subclass) mutex_lock(lock) -# define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock) -# define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock) -# define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock) -#endif - -/* - * NOTE: mutex_trylock() follows the spin_trylock() convention, - * not the down_trylock() convention! - * - * Returns 1 if the mutex has been acquired successfully, and 0 on contention. - */ -extern int mutex_trylock(struct mutex *lock); -extern void mutex_unlock(struct mutex *lock); -extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); - -#ifndef CONFIG_HAVE_ARCH_MUTEX_CPU_RELAX -#define arch_mutex_cpu_relax() cpu_relax() -#endif - -#endif |