1 // SPDX-License-Identifier: GPL-2.0 2 #include "util.h" 3 #include "rwsem.h" 4 5 int init_rwsem(struct rw_semaphore *sem) 6 { 7 return pthread_rwlock_init(&sem->lock, NULL); 8 } 9 10 int exit_rwsem(struct rw_semaphore *sem) 11 { 12 return pthread_rwlock_destroy(&sem->lock); 13 } 14 15 int down_read(struct rw_semaphore *sem) 16 { 17 return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock); 18 } 19 20 int up_read(struct rw_semaphore *sem) 21 { 22 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); 23 } 24 25 int down_write(struct rw_semaphore *sem) 26 { 27 return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock); 28 } 29 30 int up_write(struct rw_semaphore *sem) 31 { 32 return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock); 33 } 34