/usr/include/urcu/arch/generic.h is in liburcu-dev 0.7.12-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | #ifndef _URCU_ARCH_GENERIC_H
#define _URCU_ARCH_GENERIC_H
/*
* arch_generic.h: common definitions for multiple architectures.
*
* Copyright (c) 2010 Paolo Bonzini <pbonzini@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <urcu/compiler.h>
#include <urcu/config.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef CAA_CACHE_LINE_SIZE
#define CAA_CACHE_LINE_SIZE 64
#endif
#if !defined(cmm_mc) && !defined(cmm_rmc) && !defined(cmm_wmc)
#define CONFIG_HAVE_MEM_COHERENCY
/*
* Architectures with cache coherency must _not_ define cmm_mc/cmm_rmc/cmm_wmc.
*
* For them, cmm_mc/cmm_rmc/cmm_wmc are implemented with a simple
* compiler barrier; in addition, we provide defaults for cmm_mb (using
* GCC builtins) as well as cmm_rmb and cmm_wmb (defaulting to cmm_mb).
*/
#ifndef cmm_mb
#define cmm_mb() __sync_synchronize()
#endif
#ifndef cmm_rmb
#define cmm_rmb() cmm_mb()
#endif
#ifndef cmm_wmb
#define cmm_wmb() cmm_mb()
#endif
#define cmm_mc() cmm_barrier()
#define cmm_rmc() cmm_barrier()
#define cmm_wmc() cmm_barrier()
#else
/*
* Architectures without cache coherency need something like the following:
*
* #define cmm_mc() arch_cache_flush()
* #define cmm_rmc() arch_cache_flush_read()
* #define cmm_wmc() arch_cache_flush_write()
*
* Of these, only cmm_mc is mandatory. cmm_rmc and cmm_wmc default to
* cmm_mc. cmm_mb/cmm_rmb/cmm_wmb use these definitions by default:
*
* #define cmm_mb() cmm_mc()
* #define cmm_rmb() cmm_rmc()
* #define cmm_wmb() cmm_wmc()
*/
#ifndef cmm_mb
#define cmm_mb() cmm_mc()
#endif
#ifndef cmm_rmb
#define cmm_rmb() cmm_rmc()
#endif
#ifndef cmm_wmb
#define cmm_wmb() cmm_wmc()
#endif
#ifndef cmm_rmc
#define cmm_rmc() cmm_mc()
#endif
#ifndef cmm_wmc
#define cmm_wmc() cmm_mc()
#endif
#endif
/* Nop everywhere except on alpha. */
#ifndef cmm_read_barrier_depends
#define cmm_read_barrier_depends()
#endif
#ifdef CONFIG_RCU_SMP
#ifndef cmm_smp_mb
#define cmm_smp_mb() cmm_mb()
#endif
#ifndef cmm_smp_rmb
#define cmm_smp_rmb() cmm_rmb()
#endif
#ifndef cmm_smp_wmb
#define cmm_smp_wmb() cmm_wmb()
#endif
#ifndef cmm_smp_mc
#define cmm_smp_mc() cmm_mc()
#endif
#ifndef cmm_smp_rmc
#define cmm_smp_rmc() cmm_rmc()
#endif
#ifndef cmm_smp_wmc
#define cmm_smp_wmc() cmm_wmc()
#endif
#ifndef cmm_smp_read_barrier_depends
#define cmm_smp_read_barrier_depends() cmm_read_barrier_depends()
#endif
#else
#ifndef cmm_smp_mb
#define cmm_smp_mb() cmm_barrier()
#endif
#ifndef cmm_smp_rmb
#define cmm_smp_rmb() cmm_barrier()
#endif
#ifndef cmm_smp_wmb
#define cmm_smp_wmb() cmm_barrier()
#endif
#ifndef cmm_smp_mc
#define cmm_smp_mc() cmm_barrier()
#endif
#ifndef cmm_smp_rmc
#define cmm_smp_rmc() cmm_barrier()
#endif
#ifndef cmm_smp_wmc
#define cmm_smp_wmc() cmm_barrier()
#endif
#ifndef cmm_smp_read_barrier_depends
#define cmm_smp_read_barrier_depends()
#endif
#endif
#ifndef caa_cpu_relax
#define caa_cpu_relax() cmm_barrier()
#endif
#ifdef __cplusplus
}
#endif
#endif /* _URCU_ARCH_GENERIC_H */
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