tools/lib/lockdep/include/liblockdep/rwlock.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LIBLOCKDEP_RWLOCK_H
   3 #define _LIBLOCKDEP_RWLOCK_H
   4
   5 #include <pthread.h>
   6 #include "common.h"
   7
   8 struct liblockdep_pthread_rwlock {
   9         pthread_rwlock_t rwlock;
  10         struct lockdep_map dep_map;
  11 };
  12
  13 typedef struct liblockdep_pthread_rwlock liblockdep_pthread_rwlock_t;
  14
  15 #define LIBLOCKDEP_PTHREAD_RWLOCK_INITIALIZER(rwl)                      \
  16                 (struct liblockdep_pthread_rwlock) {                    \
  17         .rwlock = PTHREAD_RWLOCK_INITIALIZER,                           \
  18         .dep_map = STATIC_LOCKDEP_MAP_INIT(#rwl, &((&(rwl))->dep_map)), \
  19 }
  20
  21 static inline int __rwlock_init(liblockdep_pthread_rwlock_t *lock,
  22                                 const char *name,
  23                                 struct lock_class_key *key,
  24                                 const pthread_rwlockattr_t *attr)
  25 {
  26         lockdep_init_map(&lock->dep_map, name, key, 0);
  27
  28         return pthread_rwlock_init(&lock->rwlock, attr);
  29 }
  30
  31 #define liblockdep_pthread_rwlock_init(lock, attr)              \
  32 ({                                                      \
  33         static struct lock_class_key __key;             \
  34                                                         \
  35         __rwlock_init((lock), #lock, &__key, (attr));   \
  36 })
  37
  38 static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *lock)
  39 {
  40         lock_acquire(&lock->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
  41         return pthread_rwlock_rdlock(&lock->rwlock);
  42
  43 }
  44
  45 static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
  46 {
  47         lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
  48         return pthread_rwlock_unlock(&lock->rwlock);
  49 }
  50
  51 static inline int liblockdep_pthread_rwlock_wrlock(liblockdep_pthread_rwlock_t *lock)
  52 {
  53         lock_acquire(&lock->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
  54         return pthread_rwlock_wrlock(&lock->rwlock);
  55 }
  56
  57 static inline int liblockdep_pthread_rwlock_tryrdlock(liblockdep_pthread_rwlock_t *lock)
  58 {
  59         lock_acquire(&lock->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
  60         return pthread_rwlock_tryrdlock(&lock->rwlock) == 0 ? 1 : 0;
  61 }
  62
  63 static inline int liblockdep_pthread_rwlock_trywlock(liblockdep_pthread_rwlock_t *lock)
  64 {
  65         lock_acquire(&lock->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
  66         return pthread_rwlock_trywlock(&lock->rwlock) == 0 ? 1 : 0;
  67 }
  68
  69 static inline int liblockdep_rwlock_destroy(liblockdep_pthread_rwlock_t *lock)
  70 {
  71         return pthread_rwlock_destroy(&lock->rwlock);
  72 }
  73
  74 #ifdef __USE_LIBLOCKDEP
  75
  76 #define pthread_rwlock_t                liblockdep_pthread_rwlock_t
  77 #define pthread_rwlock_init             liblockdep_pthread_rwlock_init
  78 #define pthread_rwlock_rdlock           liblockdep_pthread_rwlock_rdlock
  79 #define pthread_rwlock_unlock           liblockdep_pthread_rwlock_unlock
  80 #define pthread_rwlock_wrlock           liblockdep_pthread_rwlock_wrlock
  81 #define pthread_rwlock_tryrdlock        liblockdep_pthread_rwlock_tryrdlock
  82 #define pthread_rwlock_trywlock         liblockdep_pthread_rwlock_trywlock
  83 #define pthread_rwlock_destroy          liblockdep_rwlock_destroy
  84
  85 #endif
  86
  87 #endif