tools/perf/util/rwsem.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "util.h"
   3 #include "rwsem.h"
   4
   5 #if RWS_ERRORCHECK
   6 #include "mutex.h"
   7 #endif
   8
   9 int init_rwsem(struct rw_semaphore *sem)
  10 {
  11 #if RWS_ERRORCHECK
  12         mutex_init(&sem->mtx);
  13         return 0;
  14 #else
  15         return pthread_rwlock_init(&sem->lock, NULL);
  16 #endif
  17 }
  18
  19 int exit_rwsem(struct rw_semaphore *sem)
  20 {
  21 #if RWS_ERRORCHECK
  22         mutex_destroy(&sem->mtx);
  23         return 0;
  24 #else
  25         return pthread_rwlock_destroy(&sem->lock);
  26 #endif
  27 }
  28
  29 int down_read(struct rw_semaphore *sem)
  30 {
  31 #if RWS_ERRORCHECK
  32         mutex_lock(&sem->mtx);
  33         return 0;
  34 #else
  35         return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock);
  36 #endif
  37 }
  38
  39 int up_read(struct rw_semaphore *sem)
  40 {
  41 #if RWS_ERRORCHECK
  42         mutex_unlock(&sem->mtx);
  43         return 0;
  44 #else
  45         return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);
  46 #endif
  47 }
  48
  49 int down_write(struct rw_semaphore *sem)
  50 {
  51 #if RWS_ERRORCHECK
  52         mutex_lock(&sem->mtx);
  53         return 0;
  54 #else
  55         return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock);
  56 #endif
  57 }
  58
  59 int up_write(struct rw_semaphore *sem)
  60 {
  61 #if RWS_ERRORCHECK
  62         mutex_unlock(&sem->mtx);
  63         return 0;
  64 #else
  65         return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);
  66 #endif
  67 }