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     volatile int read_lock;
  15     volatile int read_entry_lock;
  16     volatile int write_lock;
  17 } RWLock;
  18 #define RWLOCK_STATIC_INITIALIZE { STATIC_REFCOUNT_INIT(0), STATIC_REFCOUNT_INIT(0), false, false, false }
  19
  20 void RWLockInit(RWLock *lock);
  21 void ReadLock(RWLock *lock);
  22 void ReadUnlock(RWLock *lock);
  23 void WriteLock(RWLock *lock);
  24 void WriteUnlock(RWLock *lock);
  25
  26 #ifdef __cplusplus
  27 }
  28 #endif
  29
  30 #endif /* AL_RWLOCK_H */