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 { 12 arch_rwlock_t raw_lock; 13 #ifdef CONFIG_DEBUG_SPINLOCK 14 unsigned int magic, owner_cpu; 15 void *owner; 16 #endif 17 #ifdef CONFIG_DEBUG_LOCK_ALLOC 18 struct lockdep_map dep_map; 19 #endif 20 } rwlock_t; 21 22 #define RWLOCK_MAGIC 0xdeaf1eed 23 24 #ifdef CONFIG_DEBUG_LOCK_ALLOC 25 # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } 26 #else 27 # define RW_DEP_MAP_INIT(lockname) 28 #endif 29 30 #ifdef CONFIG_DEBUG_SPINLOCK 31 #define __RW_LOCK_UNLOCKED(lockname) \ 32 (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ 33 .magic = RWLOCK_MAGIC, \ 34 .owner = SPINLOCK_OWNER_INIT, \ 35 .owner_cpu = -1, \ 36 RW_DEP_MAP_INIT(lockname) } 37 #else 38 #define __RW_LOCK_UNLOCKED(lockname) \ 39 (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ 40 RW_DEP_MAP_INIT(lockname) } 41 #endif 42 43 #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) 44 45 #endif /* __LINUX_RWLOCK_TYPES_H */ 46