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