Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 1 | #ifndef __LINUX_RWLOCK_TYPES_H |
| 2 | #define __LINUX_RWLOCK_TYPES_H |
| 3 | |
| 4 | /* |
| 5 | * include/linux/rwlock_types.h - generic rwlock 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 | typedef struct { |
Thomas Gleixner | fb3a6bb | 2009-12-03 20:01:19 +0100 | [diff] [blame] | 12 | arch_rwlock_t raw_lock; |
Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 13 | #ifdef CONFIG_GENERIC_LOCKBREAK |
| 14 | unsigned int break_lock; |
| 15 | #endif |
| 16 | #ifdef CONFIG_DEBUG_SPINLOCK |
| 17 | unsigned int magic, owner_cpu; |
| 18 | void *owner; |
| 19 | #endif |
| 20 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 21 | struct lockdep_map dep_map; |
| 22 | #endif |
| 23 | } rwlock_t; |
| 24 | |
| 25 | #define RWLOCK_MAGIC 0xdeaf1eed |
| 26 | |
| 27 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 28 | # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } |
| 29 | #else |
| 30 | # define RW_DEP_MAP_INIT(lockname) |
| 31 | #endif |
| 32 | |
| 33 | #ifdef CONFIG_DEBUG_SPINLOCK |
| 34 | #define __RW_LOCK_UNLOCKED(lockname) \ |
Thomas Gleixner | fb3a6bb | 2009-12-03 20:01:19 +0100 | [diff] [blame] | 35 | (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ |
Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 36 | .magic = RWLOCK_MAGIC, \ |
| 37 | .owner = SPINLOCK_OWNER_INIT, \ |
| 38 | .owner_cpu = -1, \ |
| 39 | RW_DEP_MAP_INIT(lockname) } |
| 40 | #else |
| 41 | #define __RW_LOCK_UNLOCKED(lockname) \ |
Thomas Gleixner | fb3a6bb | 2009-12-03 20:01:19 +0100 | [diff] [blame] | 42 | (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ |
Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 43 | RW_DEP_MAP_INIT(lockname) } |
| 44 | #endif |
| 45 | |
Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 46 | #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) |
| 47 | |
| 48 | #endif /* __LINUX_RWLOCK_TYPES_H */ |