98 lines
1.8 KiB
C++
98 lines
1.8 KiB
C++
/*
|
|
* Copyright 2009, Michael Lotz, mmlr@mlotz.ch.
|
|
* Distributed under the terms of the MIT License.
|
|
*/
|
|
#ifndef _LOCKS_H_
|
|
#define _LOCKS_H_
|
|
|
|
#include <OS.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct mutex {
|
|
int32 benaphore;
|
|
sem_id semaphore;
|
|
} mutex;
|
|
|
|
status_t mutex_init(mutex *lock, const char *name);
|
|
void mutex_destroy(mutex *lock);
|
|
status_t mutex_lock(mutex *lock);
|
|
void mutex_unlock(mutex *lock);
|
|
|
|
|
|
typedef struct rw_lock {
|
|
const char * name;
|
|
mutex lock;
|
|
struct rw_lock_waiter * waiters;
|
|
struct rw_lock_waiter * last_waiter;
|
|
thread_id holder;
|
|
int32 reader_count;
|
|
int32 writer_count;
|
|
int32 owner_count;
|
|
} rw_lock;
|
|
|
|
status_t rw_lock_init(rw_lock *lock, const char *name);
|
|
void rw_lock_destroy(rw_lock *lock);
|
|
status_t rw_lock_read_lock(rw_lock *lock);
|
|
status_t rw_lock_read_unlock(rw_lock *lock);
|
|
status_t rw_lock_write_lock(rw_lock *lock);
|
|
status_t rw_lock_write_unlock(rw_lock *lock);
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
|
|
|
|
#include <AutoLocker.h>
|
|
|
|
class MutexLocking {
|
|
public:
|
|
inline bool Lock(struct mutex *lock)
|
|
{
|
|
return mutex_lock(lock) == B_OK;
|
|
}
|
|
|
|
inline void Unlock(struct mutex *lock)
|
|
{
|
|
mutex_unlock(lock);
|
|
}
|
|
};
|
|
|
|
|
|
class RWLockReadLocking {
|
|
public:
|
|
inline bool Lock(struct rw_lock *lock)
|
|
{
|
|
return rw_lock_read_lock(lock) == B_OK;
|
|
}
|
|
|
|
inline void Unlock(struct rw_lock *lock)
|
|
{
|
|
rw_lock_read_unlock(lock);
|
|
}
|
|
};
|
|
|
|
|
|
class RWLockWriteLocking {
|
|
public:
|
|
inline bool Lock(struct rw_lock *lock)
|
|
{
|
|
return rw_lock_write_lock(lock) == B_OK;
|
|
}
|
|
|
|
inline void Unlock(struct rw_lock *lock)
|
|
{
|
|
rw_lock_write_unlock(lock);
|
|
}
|
|
};
|
|
|
|
|
|
typedef AutoLocker<mutex, MutexLocking> MutexLocker;
|
|
typedef AutoLocker<rw_lock, RWLockReadLocking> ReadLocker;
|
|
typedef AutoLocker<rw_lock, RWLockWriteLocking> WriteLocker;
|
|
|
|
#endif // __cplusplus
|
|
|
|
#endif // _LOCKS_H_
|