lunaix-os/includes/lunaix/ds/rwlock.h

   1 #ifndef __LUNAIX_RWLOCK_H
   2 #define __LUNAIX_RWLOCK_H
   3
   4 #include "mutex.h"
   5 #include "waitq.h"
   6 #include <stdatomic.h>
   7
   8 typedef struct rwlock_s
   9 {
  10     atomic_uint readers;
  11     atomic_flag writer;
  12     waitq_t waiting_readers;
  13     waitq_t waiting_writers;
  14 } rwlock_t;
  15
  16 void
  17 rwlock_init(rwlock_t* rwlock);
  18
  19 void
  20 rwlock_begin_read(rwlock_t* rwlock);
  21
  22 void
  23 rwlock_end_read(rwlock_t* rwlock);
  24
  25 void
  26 rwlock_begin_write(rwlock_t* rwlock);
  27
  28 void
  29 rwlock_end_write(rwlock_t* rwlock);
  30
  31 #endif /* __LUNAIX_RWLOCK_H */