Cregit: Linux 6.17: rwsem.h

Contributors: 7
Author	Tokens	Token Proportion	Commits	Commit Proportion
Arnaldo Carvalho de Melo	60	54.55%	4	36.36%
Ian Rogers	36	32.73%	2	18.18%
Adrian Hunter	4	3.64%	1	9.09%
Namhyung Kim	3	2.73%	1	9.09%
Steven Rostedt	3	2.73%	1	9.09%
Ingo Molnar	2	1.82%	1	9.09%
Krister Johansen	2	1.82%	1	9.09%
Total	110		11

#ifndef _PERF_RWSEM_H
#define _PERF_RWSEM_H

#include <pthread.h>
#include "mutex.h"

/*
 * Mutexes have additional error checking. Enable to use a mutex rather than a
 * rwlock for debugging.
 */
#define RWS_ERRORCHECK 0

struct LOCKABLE rw_semaphore {
#if RWS_ERRORCHECK
	struct mutex mtx;
#else
	pthread_rwlock_t lock;
#endif
};

int init_rwsem(struct rw_semaphore *sem);
int exit_rwsem(struct rw_semaphore *sem);

int down_read(struct rw_semaphore *sem) SHARED_LOCK_FUNCTION(sem);
int up_read(struct rw_semaphore *sem) UNLOCK_FUNCTION(sem);

int down_write(struct rw_semaphore *sem) EXCLUSIVE_LOCK_FUNCTION(sem);
int up_write(struct rw_semaphore *sem) UNLOCK_FUNCTION(sem);

#endif /* _PERF_RWSEM_H */