1 #include "util.h" 2 #include "rwsem.h" 3 4 int init_rwsem(struct rw_semaphore *sem) 5 { 6 return pthread_rwlock_init(&sem->lock, NULL); 7 } 8 9 int exit_rwsem(struct rw_semaphore *sem) 10 { 11 return pthread_rwlock_destroy(&sem->lock); 12 } 13 14 int down_read(struct rw_semaphore *sem) 15 { 16 return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock); 17 } 18 19 int up_read(struct rw_semaphore *sem) 20 { 21 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); 22 } 23 24 int down_write(struct rw_semaphore *sem) 25 { 26 return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock); 27 } 28 29 int up_write(struct rw_semaphore *sem) 30 { 31 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); 32 } 33