root/tools/perf/util/rwsem.c

DEFINITIONS

1. init_rwsem
2. exit_rwsem
3. down_read
4. up_read
5. down_write
6. up_write

   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 }