Cregit: Linux 6.7: rwsem.h

Contributors: 8
Author	Tokens	Token Proportion	Commits	Commit Proportion
Arnaldo Carvalho de Melo	59	63.44%	5	41.67%
Ian Rogers	19	20.43%	1	8.33%
Adrian Hunter	5	5.38%	1	8.33%
Steven Rostedt	3	3.23%	1	8.33%
Krister Johansen	2	2.15%	1	8.33%
Masami Hiramatsu	2	2.15%	1	8.33%
Ingo Molnar	2	2.15%	1	8.33%
Jiri Olsa	1	1.08%	1	8.33%
Total	93		12

#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 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);
int up_read(struct rw_semaphore *sem);

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

#endif /* _PERF_RWSEM_H */