1 #ifndef _PERF_RWSEM_H 1 #ifndef _PERF_RWSEM_H
2 #define _PERF_RWSEM_H 2 #define _PERF_RWSEM_H
3 3
4 #include <pthread.h> 4 #include <pthread.h>
5 #include "mutex.h" 5 #include "mutex.h"
6 6
7 /* 7 /*
8 * Mutexes have additional error checking. Ena 8 * Mutexes have additional error checking. Enable to use a mutex rather than a
9 * rwlock for debugging. 9 * rwlock for debugging.
10 */ 10 */
11 #define RWS_ERRORCHECK 0 11 #define RWS_ERRORCHECK 0
12 12
13 struct rw_semaphore { 13 struct rw_semaphore {
14 #if RWS_ERRORCHECK 14 #if RWS_ERRORCHECK
15 struct mutex mtx; 15 struct mutex mtx;
16 #else 16 #else
17 pthread_rwlock_t lock; 17 pthread_rwlock_t lock;
18 #endif 18 #endif
19 }; 19 };
20 20
21 int init_rwsem(struct rw_semaphore *sem); 21 int init_rwsem(struct rw_semaphore *sem);
22 int exit_rwsem(struct rw_semaphore *sem); 22 int exit_rwsem(struct rw_semaphore *sem);
23 23
24 int down_read(struct rw_semaphore *sem); 24 int down_read(struct rw_semaphore *sem);
25 int up_read(struct rw_semaphore *sem); 25 int up_read(struct rw_semaphore *sem);
26 26
27 int down_write(struct rw_semaphore *sem); 27 int down_write(struct rw_semaphore *sem);
28 int up_write(struct rw_semaphore *sem); 28 int up_write(struct rw_semaphore *sem);
29 29
30 #endif /* _PERF_RWSEM_H */ 30 #endif /* _PERF_RWSEM_H */
31 31
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