LXR linux/tools/perf/util/rwsem.c

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