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#ifndef LITMUS_LOCKING_H
#define LITMUS_LOCKING_H
struct litmus_lock_ops;
/* Generic base struct for LITMUS^RT userspace semaphores.
* This structure should be embedded in protocol-specific semaphores.
*/
struct litmus_lock {
struct litmus_lock_ops *ops;
int type;
};
struct litmus_lock_ops {
/* Current task tries to obtain / drop a reference to a lock.
* Optional methods, allowed by default. */
int (*open)(struct litmus_lock*, void* __user);
int (*close)(struct litmus_lock*);
/* Current tries to lock/unlock this lock (mandatory methods). */
int (*lock)(struct litmus_lock*);
int (*unlock)(struct litmus_lock*);
/* The lock is no longer being referenced (mandatory method). */
void (*deallocate)(struct litmus_lock*);
};
#endif
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