blob: b156bd91ba4e74662d012ef876234a13521a6c25 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* Copyright (c) 2013-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP spinlock
*/
#ifndef ODP_API_SPEC_SPINLOCK_H_
#define ODP_API_SPEC_SPINLOCK_H_
#include <odp/visibility_begin.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup odp_locks
* @details
* <b> Spin lock (odp_spinlock_t) </b>
*
* Spinlock simply re-tries to acquire the lock as long as takes to succeed.
* Spinlock is not fair since some threads may succeed more often than others.
* @{
*/
/**
* @typedef odp_spinlock_t
* ODP spinlock
*/
/**
* Initialize spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_init(odp_spinlock_t *splock);
/**
* Acquire spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_lock(odp_spinlock_t *splock);
/**
* Try to acquire spin lock.
*
* @param splock Pointer to a spin lock
*
* @retval 0 lock not acquired
* @retval !0 lock acquired
*/
int odp_spinlock_trylock(odp_spinlock_t *splock);
/**
* Release spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_unlock(odp_spinlock_t *splock);
/**
* Check if spin lock is busy (locked).
*
* @param splock Pointer to a spin lock
*
* @retval 1 lock busy (locked)
* @retval 0 lock not busy.
*/
int odp_spinlock_is_locked(odp_spinlock_t *splock);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#include <odp/visibility_end.h>
#endif
|