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 55 BEGIN_C_DECLS 56 57 extern cl_spinlock_t cl_atomic_spinlock; 58 59 static 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 70 static 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 81 static inline int32_t 82 cl_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 93 static inline int32_t 94 cl_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 } 104 105 END_C_DECLS 106 #endif /* _CL_ATOMIC_OSD_H_ */ 107