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-rw-r--r--ANDROID_3.4.5/include/linux/rwsem.h133
1 files changed, 0 insertions, 133 deletions
diff --git a/ANDROID_3.4.5/include/linux/rwsem.h b/ANDROID_3.4.5/include/linux/rwsem.h
deleted file mode 100644
index 54bd7cd7..00000000
--- a/ANDROID_3.4.5/include/linux/rwsem.h
+++ /dev/null
@@ -1,133 +0,0 @@
-/* rwsem.h: R/W semaphores, public interface
- *
- * Written by David Howells (dhowells@redhat.com).
- * Derived from asm-i386/semaphore.h
- */
-
-#ifndef _LINUX_RWSEM_H
-#define _LINUX_RWSEM_H
-
-#include <linux/linkage.h>
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/spinlock.h>
-
-#include <linux/atomic.h>
-
-struct rw_semaphore;
-
-#ifdef CONFIG_RWSEM_GENERIC_SPINLOCK
-#include <linux/rwsem-spinlock.h> /* use a generic implementation */
-#else
-/* All arch specific implementations share the same struct */
-struct rw_semaphore {
- long count;
- raw_spinlock_t wait_lock;
- struct list_head wait_list;
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
- struct lockdep_map dep_map;
-#endif
-};
-
-extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
-extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
-
-/* Include the arch specific part */
-#include <asm/rwsem.h>
-
-/* In all implementations count != 0 means locked */
-static inline int rwsem_is_locked(struct rw_semaphore *sem)
-{
- return sem->count != 0;
-}
-
-#endif
-
-/* Common initializer macros and functions */
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
-#else
-# define __RWSEM_DEP_MAP_INIT(lockname)
-#endif
-
-#define __RWSEM_INITIALIZER(name) \
- { RWSEM_UNLOCKED_VALUE, \
- __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock), \
- LIST_HEAD_INIT((name).wait_list) \
- __RWSEM_DEP_MAP_INIT(name) }
-
-#define DECLARE_RWSEM(name) \
- struct rw_semaphore name = __RWSEM_INITIALIZER(name)
-
-extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
- struct lock_class_key *key);
-
-#define init_rwsem(sem) \
-do { \
- static struct lock_class_key __key; \
- \
- __init_rwsem((sem), #sem, &__key); \
-} while (0)
-
-/*
- * lock for reading
- */
-extern void down_read(struct rw_semaphore *sem);
-
-/*
- * trylock for reading -- returns 1 if successful, 0 if contention
- */
-extern int down_read_trylock(struct rw_semaphore *sem);
-
-/*
- * lock for writing
- */
-extern void down_write(struct rw_semaphore *sem);
-
-/*
- * trylock for writing -- returns 1 if successful, 0 if contention
- */
-extern int down_write_trylock(struct rw_semaphore *sem);
-
-/*
- * release a read lock
- */
-extern void up_read(struct rw_semaphore *sem);
-
-/*
- * release a write lock
- */
-extern void up_write(struct rw_semaphore *sem);
-
-/*
- * downgrade write lock to read lock
- */
-extern void downgrade_write(struct rw_semaphore *sem);
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-/*
- * nested locking. NOTE: rwsems are not allowed to recurse
- * (which occurs if the same task tries to acquire the same
- * lock instance multiple times), but multiple locks of the
- * same lock class might be taken, if the order of the locks
- * is always the same. This ordering rule can be expressed
- * to lockdep via the _nested() APIs, but enumerating the
- * subclasses that are used. (If the nesting relationship is
- * static then another method for expressing nested locking is
- * the explicit definition of lock class keys and the use of
- * lockdep_set_class() at lock initialization time.
- * See Documentation/lockdep-design.txt for more details.)
- */
-extern void down_read_nested(struct rw_semaphore *sem, int subclass);
-extern void down_write_nested(struct rw_semaphore *sem, int subclass);
-#else
-# define down_read_nested(sem, subclass) down_read(sem)
-# define down_write_nested(sem, subclass) down_write(sem)
-#endif
-
-#endif /* _LINUX_RWSEM_H */