1/*
2 * Copyright (c) 2004-2006 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/*
37 * Abstract:
38 *	Implementation specific header files for atomic operations.
39 */
40
41#ifndef _CL_ATOMIC_OSD_H_
42#define _CL_ATOMIC_OSD_H_
43
44#include <complib/cl_types.h>
45#include <complib/cl_spinlock.h>
46
47#ifdef __cplusplus
48#  define BEGIN_C_DECLS extern "C" {
49#  define END_C_DECLS   }
50#else				/* !__cplusplus */
51#  define BEGIN_C_DECLS
52#  define END_C_DECLS
53#endif				/* __cplusplus */
54
55BEGIN_C_DECLS extern cl_spinlock_t cl_atomic_spinlock;
56
57static inline int32_t cl_atomic_inc(IN atomic32_t * const p_value)
58{
59	int32_t new_val;
60
61	cl_spinlock_acquire(&cl_atomic_spinlock);
62	new_val = *p_value + 1;
63	*p_value = new_val;
64	cl_spinlock_release(&cl_atomic_spinlock);
65	return (new_val);
66}
67
68static inline int32_t cl_atomic_dec(IN atomic32_t * const p_value)
69{
70	int32_t new_val;
71
72	cl_spinlock_acquire(&cl_atomic_spinlock);
73	new_val = *p_value - 1;
74	*p_value = new_val;
75	cl_spinlock_release(&cl_atomic_spinlock);
76	return (new_val);
77}
78
79static inline int32_t
80cl_atomic_add(IN atomic32_t * const p_value, IN const int32_t increment)
81{
82	int32_t new_val;
83
84	cl_spinlock_acquire(&cl_atomic_spinlock);
85	new_val = *p_value + increment;
86	*p_value = new_val;
87	cl_spinlock_release(&cl_atomic_spinlock);
88	return (new_val);
89}
90
91static inline int32_t
92cl_atomic_sub(IN atomic32_t * const p_value, IN const int32_t decrement)
93{
94	int32_t new_val;
95
96	cl_spinlock_acquire(&cl_atomic_spinlock);
97	new_val = *p_value + decrement;
98	*p_value = new_val;
99	cl_spinlock_release(&cl_atomic_spinlock);
100	return (new_val);
101}
102
103END_C_DECLS
104#endif				/* _CL_ATOMIC_OSD_H_ */
105