1*d6b92ffaSHans Petter Selasky /*
2*d6b92ffaSHans Petter Selasky * Copyright (c) 2004-2006 Voltaire, Inc. All rights reserved.
3*d6b92ffaSHans Petter Selasky * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
4*d6b92ffaSHans Petter Selasky * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
5*d6b92ffaSHans Petter Selasky *
6*d6b92ffaSHans Petter Selasky * This software is available to you under a choice of one of two
7*d6b92ffaSHans Petter Selasky * licenses. You may choose to be licensed under the terms of the GNU
8*d6b92ffaSHans Petter Selasky * General Public License (GPL) Version 2, available from the file
9*d6b92ffaSHans Petter Selasky * COPYING in the main directory of this source tree, or the
10*d6b92ffaSHans Petter Selasky * OpenIB.org BSD license below:
11*d6b92ffaSHans Petter Selasky *
12*d6b92ffaSHans Petter Selasky * Redistribution and use in source and binary forms, with or
13*d6b92ffaSHans Petter Selasky * without modification, are permitted provided that the following
14*d6b92ffaSHans Petter Selasky * conditions are met:
15*d6b92ffaSHans Petter Selasky *
16*d6b92ffaSHans Petter Selasky * - Redistributions of source code must retain the above
17*d6b92ffaSHans Petter Selasky * copyright notice, this list of conditions and the following
18*d6b92ffaSHans Petter Selasky * disclaimer.
19*d6b92ffaSHans Petter Selasky *
20*d6b92ffaSHans Petter Selasky * - Redistributions in binary form must reproduce the above
21*d6b92ffaSHans Petter Selasky * copyright notice, this list of conditions and the following
22*d6b92ffaSHans Petter Selasky * disclaimer in the documentation and/or other materials
23*d6b92ffaSHans Petter Selasky * provided with the distribution.
24*d6b92ffaSHans Petter Selasky *
25*d6b92ffaSHans Petter Selasky * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26*d6b92ffaSHans Petter Selasky * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27*d6b92ffaSHans Petter Selasky * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28*d6b92ffaSHans Petter Selasky * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29*d6b92ffaSHans Petter Selasky * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30*d6b92ffaSHans Petter Selasky * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31*d6b92ffaSHans Petter Selasky * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32*d6b92ffaSHans Petter Selasky * SOFTWARE.
33*d6b92ffaSHans Petter Selasky *
34*d6b92ffaSHans Petter Selasky */
35*d6b92ffaSHans Petter Selasky
36*d6b92ffaSHans Petter Selasky /*
37*d6b92ffaSHans Petter Selasky * Abstract:
38*d6b92ffaSHans Petter Selasky * Implementation specific header files for atomic operations.
39*d6b92ffaSHans Petter Selasky */
40*d6b92ffaSHans Petter Selasky
41*d6b92ffaSHans Petter Selasky #ifndef _CL_ATOMIC_OSD_H_
42*d6b92ffaSHans Petter Selasky #define _CL_ATOMIC_OSD_H_
43*d6b92ffaSHans Petter Selasky
44*d6b92ffaSHans Petter Selasky #include <complib/cl_types.h>
45*d6b92ffaSHans Petter Selasky #include <complib/cl_spinlock.h>
46*d6b92ffaSHans Petter Selasky
47*d6b92ffaSHans Petter Selasky #ifdef __cplusplus
48*d6b92ffaSHans Petter Selasky # define BEGIN_C_DECLS extern "C" {
49*d6b92ffaSHans Petter Selasky # define END_C_DECLS }
50*d6b92ffaSHans Petter Selasky #else /* !__cplusplus */
51*d6b92ffaSHans Petter Selasky # define BEGIN_C_DECLS
52*d6b92ffaSHans Petter Selasky # define END_C_DECLS
53*d6b92ffaSHans Petter Selasky #endif /* __cplusplus */
54*d6b92ffaSHans Petter Selasky
55*d6b92ffaSHans Petter Selasky BEGIN_C_DECLS
56*d6b92ffaSHans Petter Selasky
57*d6b92ffaSHans Petter Selasky extern cl_spinlock_t cl_atomic_spinlock;
58*d6b92ffaSHans Petter Selasky
cl_atomic_inc(IN atomic32_t * const p_value)59*d6b92ffaSHans Petter Selasky static inline int32_t cl_atomic_inc(IN atomic32_t * const p_value)
60*d6b92ffaSHans Petter Selasky {
61*d6b92ffaSHans Petter Selasky int32_t new_val;
62*d6b92ffaSHans Petter Selasky
63*d6b92ffaSHans Petter Selasky cl_spinlock_acquire(&cl_atomic_spinlock);
64*d6b92ffaSHans Petter Selasky new_val = *p_value + 1;
65*d6b92ffaSHans Petter Selasky *p_value = new_val;
66*d6b92ffaSHans Petter Selasky cl_spinlock_release(&cl_atomic_spinlock);
67*d6b92ffaSHans Petter Selasky return (new_val);
68*d6b92ffaSHans Petter Selasky }
69*d6b92ffaSHans Petter Selasky
cl_atomic_dec(IN atomic32_t * const p_value)70*d6b92ffaSHans Petter Selasky static inline int32_t cl_atomic_dec(IN atomic32_t * const p_value)
71*d6b92ffaSHans Petter Selasky {
72*d6b92ffaSHans Petter Selasky int32_t new_val;
73*d6b92ffaSHans Petter Selasky
74*d6b92ffaSHans Petter Selasky cl_spinlock_acquire(&cl_atomic_spinlock);
75*d6b92ffaSHans Petter Selasky new_val = *p_value - 1;
76*d6b92ffaSHans Petter Selasky *p_value = new_val;
77*d6b92ffaSHans Petter Selasky cl_spinlock_release(&cl_atomic_spinlock);
78*d6b92ffaSHans Petter Selasky return (new_val);
79*d6b92ffaSHans Petter Selasky }
80*d6b92ffaSHans Petter Selasky
81*d6b92ffaSHans Petter Selasky static inline int32_t
cl_atomic_add(IN atomic32_t * const p_value,IN const int32_t increment)82*d6b92ffaSHans Petter Selasky cl_atomic_add(IN atomic32_t * const p_value, IN const int32_t increment)
83*d6b92ffaSHans Petter Selasky {
84*d6b92ffaSHans Petter Selasky int32_t new_val;
85*d6b92ffaSHans Petter Selasky
86*d6b92ffaSHans Petter Selasky cl_spinlock_acquire(&cl_atomic_spinlock);
87*d6b92ffaSHans Petter Selasky new_val = *p_value + increment;
88*d6b92ffaSHans Petter Selasky *p_value = new_val;
89*d6b92ffaSHans Petter Selasky cl_spinlock_release(&cl_atomic_spinlock);
90*d6b92ffaSHans Petter Selasky return (new_val);
91*d6b92ffaSHans Petter Selasky }
92*d6b92ffaSHans Petter Selasky
93*d6b92ffaSHans Petter Selasky static inline int32_t
cl_atomic_sub(IN atomic32_t * const p_value,IN const int32_t decrement)94*d6b92ffaSHans Petter Selasky cl_atomic_sub(IN atomic32_t * const p_value, IN const int32_t decrement)
95*d6b92ffaSHans Petter Selasky {
96*d6b92ffaSHans Petter Selasky int32_t new_val;
97*d6b92ffaSHans Petter Selasky
98*d6b92ffaSHans Petter Selasky cl_spinlock_acquire(&cl_atomic_spinlock);
99*d6b92ffaSHans Petter Selasky new_val = *p_value - decrement;
100*d6b92ffaSHans Petter Selasky *p_value = new_val;
101*d6b92ffaSHans Petter Selasky cl_spinlock_release(&cl_atomic_spinlock);
102*d6b92ffaSHans Petter Selasky return (new_val);
103*d6b92ffaSHans Petter Selasky }
104*d6b92ffaSHans Petter Selasky
105*d6b92ffaSHans Petter Selasky END_C_DECLS
106*d6b92ffaSHans Petter Selasky #endif /* _CL_ATOMIC_OSD_H_ */
107