cl_atomic_osd.h revision 285830
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