include/rwlock.h

   1 #ifndef AL_RWLOCK_H
   2 #define AL_RWLOCK_H
   3
   4 #include "bool.h"
   5 #include "atomic.h"
   6
   7 #ifdef __cplusplus
   8 extern "C" {
   9 #endif
  10
  11 typedef struct {
  12     RefCount read_count;
  13     RefCount write_count;
  14     ATOMIC(int) read_lock;
  15     ATOMIC(int) read_entry_lock;
  16     ATOMIC(int) write_lock;
  17 } RWLock;
  18 #define RWLOCK_STATIC_INITIALIZE { ATOMIC_INIT_STATIC(0), ATOMIC_INIT_STATIC(0),         \
  19                                    ATOMIC_INIT_STATIC(false), ATOMIC_INIT_STATIC(false), \
  20                                    ATOMIC_INIT_STATIC(false) }
  21
  22 void RWLockInit(RWLock *lock);
  23 void ReadLock(RWLock *lock);
  24 void ReadUnlock(RWLock *lock);
  25 void WriteLock(RWLock *lock);
  26 void WriteUnlock(RWLock *lock);
  27
  28 #ifdef __cplusplus
  29 }
  30 #endif
  31
  32 #endif /* AL_RWLOCK_H */