projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fb1c8f93 IM |
1 | #ifndef __LINUX_SPINLOCK_TYPES_H |
| 2 | #define __LINUX_SPINLOCK_TYPES_H | |
| 3 | ||
| 4 | /* | |
| 5 | * include/linux/spinlock_types.h - generic spinlock type definitions | |
| 6 | * and initializers | |
| 7 | * | |
| 8 | * portions Copyright 2005, Red Hat, Inc., Ingo Molnar | |
| 9 | * Released under the General Public License (GPL). | |
| 10 | */ | |
| 11 | ||
| 12 | #if defined(CONFIG_SMP) | |
| 13 | # include <asm/spinlock_types.h> | |
| 14 | #else | |
| 15 | # include <linux/spinlock_types_up.h> | |
| 16 | #endif | |
| 17 | ||
| 18 | typedef struct { | |
| 19 | raw_spinlock_t raw_lock; | |
| 20 | #if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP) | |
| 21 | unsigned int break_lock; | |
| 22 | #endif | |
| 23 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 24 | unsigned int magic, owner_cpu; | |
| 25 | void *owner; | |
| 26 | #endif | |
| 27 | } spinlock_t; | |
| 28 | ||
| 29 | #define SPINLOCK_MAGIC 0xdead4ead | |
| 30 | ||
| 31 | typedef struct { | |
| 32 | raw_rwlock_t raw_lock; | |
| 33 | #if defined(CONFIG_PREEMPT) && defined(CONFIG_SMP) | |
| 34 | unsigned int break_lock; | |
| 35 | #endif | |
| 36 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 37 | unsigned int magic, owner_cpu; | |
| 38 | void *owner; | |
| 39 | #endif | |
| 40 | } rwlock_t; | |
| 41 | ||
| 42 | #define RWLOCK_MAGIC 0xdeaf1eed | |
| 43 | ||
| 44 | #define SPINLOCK_OWNER_INIT ((void *)-1L) | |
| 45 | ||
| 46 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 47 | # define SPIN_LOCK_UNLOCKED \ | |
| 48 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \ | |
| 49 | .magic = SPINLOCK_MAGIC, \ | |
| 50 | .owner = SPINLOCK_OWNER_INIT, \ | |
| 51 | .owner_cpu = -1 } | |
| 52 | #define RW_LOCK_UNLOCKED \ | |
| 53 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \ | |
| 54 | .magic = RWLOCK_MAGIC, \ | |
| 55 | .owner = SPINLOCK_OWNER_INIT, \ | |
| 56 | .owner_cpu = -1 } | |
| 57 | #else | |
| 58 | # define SPIN_LOCK_UNLOCKED \ | |
| 59 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED } | |
| 60 | #define RW_LOCK_UNLOCKED \ | |
| 61 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED } | |
| 62 | #endif | |
| 63 | ||
| 64 | #define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED | |
| 65 | #define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED | |
| 66 | ||
| 67 | #endif /* __LINUX_SPINLOCK_TYPES_H */ |