1/*
2 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
3 * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
4 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses.  You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 */
35
36#if HAVE_CONFIG_H
37#  include <config.h>
38#endif				/* HAVE_CONFIG_H */
39
40#include <complib/cl_spinlock.h>
41
42void cl_spinlock_construct(IN cl_spinlock_t * const p_spinlock)
43{
44	CL_ASSERT(p_spinlock);
45
46	p_spinlock->state = CL_UNINITIALIZED;
47}
48
49cl_status_t cl_spinlock_init(IN cl_spinlock_t * const p_spinlock)
50{
51	CL_ASSERT(p_spinlock);
52
53	cl_spinlock_construct(p_spinlock);
54
55	/* Initialize with pthread_mutexattr_t = NULL */
56	if (pthread_mutex_init(&p_spinlock->mutex, NULL))
57		return (CL_ERROR);
58
59	p_spinlock->state = CL_INITIALIZED;
60	return (CL_SUCCESS);
61}
62
63void cl_spinlock_destroy(IN cl_spinlock_t * const p_spinlock)
64{
65	CL_ASSERT(p_spinlock);
66	CL_ASSERT(cl_is_state_valid(p_spinlock->state));
67
68	if (p_spinlock->state == CL_INITIALIZED) {
69		p_spinlock->state = CL_UNINITIALIZED;
70		pthread_mutex_lock(&p_spinlock->mutex);
71		pthread_mutex_unlock(&p_spinlock->mutex);
72		pthread_mutex_destroy(&p_spinlock->mutex);
73	}
74	p_spinlock->state = CL_UNINITIALIZED;
75}
76
77void cl_spinlock_acquire(IN cl_spinlock_t * const p_spinlock)
78{
79	CL_ASSERT(p_spinlock);
80	CL_ASSERT(p_spinlock->state == CL_INITIALIZED);
81
82	pthread_mutex_lock(&p_spinlock->mutex);
83}
84
85void cl_spinlock_release(IN cl_spinlock_t * const p_spinlock)
86{
87	CL_ASSERT(p_spinlock);
88	CL_ASSERT(p_spinlock->state == CL_INITIALIZED);
89
90	pthread_mutex_unlock(&p_spinlock->mutex);
91}
92