54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#ifndef _GENLOCK_H_
|
|
#define _GENLOCK_H_
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
struct genlock;
|
|
struct genlock_handle;
|
|
|
|
struct genlock_handle *genlock_get_handle(void);
|
|
struct genlock_handle *genlock_get_handle_fd(int fd);
|
|
int genlock_get_fd_handle(struct genlock_handle *handle);
|
|
void genlock_put_handle(struct genlock_handle *handle);
|
|
struct genlock *genlock_create_lock(struct genlock_handle *);
|
|
struct genlock *genlock_attach_lock(struct genlock_handle *, int fd);
|
|
int genlock_wait(struct genlock_handle *handle, u32 timeout);
|
|
/* genlock_release_lock was deprecated */
|
|
int genlock_lock(struct genlock_handle *handle, int op, int flags,
|
|
u32 timeout);
|
|
#endif
|
|
|
|
#define GENLOCK_UNLOCK 0
|
|
#define GENLOCK_WRLOCK 1
|
|
#define GENLOCK_RDLOCK 2
|
|
|
|
#define GENLOCK_NOBLOCK (1 << 0)
|
|
#define GENLOCK_WRITE_TO_READ (1 << 1)
|
|
|
|
struct genlock_lock {
|
|
int fd;
|
|
int op;
|
|
int flags;
|
|
int timeout;
|
|
};
|
|
|
|
#define GENLOCK_IOC_MAGIC 'G'
|
|
|
|
#define GENLOCK_IOC_NEW _IO(GENLOCK_IOC_MAGIC, 0)
|
|
#define GENLOCK_IOC_EXPORT _IOR(GENLOCK_IOC_MAGIC, 1, \
|
|
struct genlock_lock)
|
|
#define GENLOCK_IOC_ATTACH _IOW(GENLOCK_IOC_MAGIC, 2, \
|
|
struct genlock_lock)
|
|
|
|
/* Deprecated */
|
|
#define GENLOCK_IOC_LOCK _IOW(GENLOCK_IOC_MAGIC, 3, \
|
|
struct genlock_lock)
|
|
|
|
/* Deprecated */
|
|
#define GENLOCK_IOC_RELEASE _IO(GENLOCK_IOC_MAGIC, 4)
|
|
#define GENLOCK_IOC_WAIT _IOW(GENLOCK_IOC_MAGIC, 5, \
|
|
struct genlock_lock)
|
|
#define GENLOCK_IOC_DREADLOCK _IOW(GENLOCK_IOC_MAGIC, 6, \
|
|
struct genlock_lock)
|
|
#endif
|