git.sesse.net Git - bcachefs-tools-debian/blob - c_src/include/linux/rwsem.h

   1 #ifndef __TOOLS_LINUX_RWSEM_H
   2 #define __TOOLS_LINUX_RWSEM_H
   3
   4 #include <pthread.h>
   5
   6 struct rw_semaphore {
   7         pthread_rwlock_t        lock;
   8 };
   9
  10 #define __RWSEM_INITIALIZER(name)                               \
  11         { .lock = PTHREAD_RWLOCK_INITIALIZER }
  12
  13 #define DECLARE_RWSEM(name) \
  14         struct rw_semaphore name = __RWSEM_INITIALIZER(name)
  15
  16 static inline void init_rwsem(struct rw_semaphore *lock)
  17 {
  18         pthread_rwlock_init(&lock->lock, NULL);
  19 }
  20
  21 #define down_read(l)            pthread_rwlock_rdlock(&(l)->lock)
  22 #define down_read_killable(l)   (pthread_rwlock_rdlock(&(l)->lock), 0)
  23 #define down_read_trylock(l)    (!pthread_rwlock_tryrdlock(&(l)->lock))
  24 #define up_read(l)              pthread_rwlock_unlock(&(l)->lock)
  25
  26 #define down_write(l)           pthread_rwlock_wrlock(&(l)->lock)
  27 #define up_write(l)             pthread_rwlock_unlock(&(l)->lock)
  28
  29 #endif /* __TOOLS_LINUX_RWSEM_H */