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
cl_spinlock_construct(IN cl_spinlock_t * const p_spinlock)42 void 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
cl_spinlock_init(IN cl_spinlock_t * const p_spinlock)49 cl_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
cl_spinlock_destroy(IN cl_spinlock_t * const p_spinlock)63 void 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
cl_spinlock_acquire(IN cl_spinlock_t * const p_spinlock)77 void 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
cl_spinlock_release(IN cl_spinlock_t * const p_spinlock)85 void 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