This source file includes following definitions.
- osq_lock_init
- osq_is_locked
1
2 #ifndef __LINUX_OSQ_LOCK_H
3 #define __LINUX_OSQ_LOCK_H
4
5
6
7
8
9 struct optimistic_spin_node {
10 struct optimistic_spin_node *next, *prev;
11 int locked;
12 int cpu;
13 };
14
15 struct optimistic_spin_queue {
16
17
18
19
20 atomic_t tail;
21 };
22
23 #define OSQ_UNLOCKED_VAL (0)
24
25
26 #define OSQ_LOCK_UNLOCKED { ATOMIC_INIT(OSQ_UNLOCKED_VAL) }
27
28 static inline void osq_lock_init(struct optimistic_spin_queue *lock)
29 {
30 atomic_set(&lock->tail, OSQ_UNLOCKED_VAL);
31 }
32
33 extern bool osq_lock(struct optimistic_spin_queue *lock);
34 extern void osq_unlock(struct optimistic_spin_queue *lock);
35
36 static inline bool osq_is_locked(struct optimistic_spin_queue *lock)
37 {
38 return atomic_read(&lock->tail) != OSQ_UNLOCKED_VAL;
39 }
40
41 #endif