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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/mutex.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (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.h176
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
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--- a/ANDROID_3.4.5/include/linux/mutex.h
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@@ -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