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
56
57extern cl_spinlock_t cl_atomic_spinlock;
58
59static inline int32_t cl_atomic_inc(IN atomic32_t * const p_value)
60{
61	int32_t new_val;
62
63	cl_spinlock_acquire(&cl_atomic_spinlock);
64	new_val = *p_value + 1;
65	*p_value = new_val;
66	cl_spinlock_release(&cl_atomic_spinlock);
67	return (new_val);
68}
69
70static inline int32_t cl_atomic_dec(IN atomic32_t * const p_value)
71{
72	int32_t new_val;
73
74	cl_spinlock_acquire(&cl_atomic_spinlock);
75	new_val = *p_value - 1;
76	*p_value = new_val;
77	cl_spinlock_release(&cl_atomic_spinlock);
78	return (new_val);
79}
80
81static inline int32_t
82cl_atomic_add(IN atomic32_t * const p_value, IN const int32_t increment)
83{
84	int32_t new_val;
85
86	cl_spinlock_acquire(&cl_atomic_spinlock);
87	new_val = *p_value + increment;
88	*p_value = new_val;
89	cl_spinlock_release(&cl_atomic_spinlock);
90	return (new_val);
91}
92
93static inline int32_t
94cl_atomic_sub(IN atomic32_t * const p_value, IN const int32_t decrement)
95{
96	int32_t new_val;
97
98	cl_spinlock_acquire(&cl_atomic_spinlock);
99	new_val = *p_value - decrement;
100	*p_value = new_val;
101	cl_spinlock_release(&cl_atomic_spinlock);
102	return (new_val);
103}
104
105END_C_DECLS
106#endif				/* _CL_ATOMIC_OSD_H_ */
107