1 /************************************************************************** 2 * 3 * Copyright 2007-2008 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 #ifndef P_COMPILER_H 29 #define P_COMPILER_H 30 31 32 #include "c99_compat.h" /* inline, __func__, etc. */ 33 34 #include "p_config.h" 35 36 #include "util/macros.h" 37 38 #include <stdlib.h> 39 #include <string.h> 40 #include <stddef.h> 41 #include <stdarg.h> 42 #include <limits.h> 43 44 45 #if defined(_WIN32) && !defined(__WIN32__) 46 #define __WIN32__ 47 #endif 48 49 #if defined(_MSC_VER) 50 51 #include <intrin.h> 52 53 /* Avoid 'expression is always true' warning */ 54 #pragma warning(disable: 4296) 55 56 #endif /* _MSC_VER */ 57 58 59 /* 60 * Alternative stdint.h and stdbool.h headers are supplied in include/c99 for 61 * systems that lack it. 62 */ 63 #include <stdint.h> 64 #include <stdbool.h> 65 66 67 #ifdef __cplusplus 68 extern "C" { 69 #endif 70 71 72 #if !defined(__HAIKU__) && !defined(__USE_MISC) 73 #if !defined(PIPE_OS_ANDROID) 74 typedef unsigned int uint; 75 #endif 76 typedef unsigned short ushort; 77 #endif 78 typedef unsigned char ubyte; 79 80 typedef unsigned char boolean; 81 #ifndef TRUE 82 #define TRUE true 83 #endif 84 #ifndef FALSE 85 #define FALSE false 86 #endif 87 88 #ifndef va_copy 89 #ifdef __va_copy 90 #define va_copy(dest, src) __va_copy((dest), (src)) 91 #else 92 #define va_copy(dest, src) (dest) = (src) 93 #endif 94 #endif 95 96 97 /* XXX: Use standard `__func__` instead */ 98 #ifndef __FUNCTION__ 99 # define __FUNCTION__ __func__ 100 #endif 101 102 103 /* This should match linux gcc cdecl semantics everywhere, so that we 104 * just codegen one calling convention on all platforms. 105 */ 106 #ifdef _MSC_VER 107 #define PIPE_CDECL __cdecl 108 #else 109 #define PIPE_CDECL 110 #endif 111 112 113 114 #if defined(__GNUC__) 115 #define PIPE_DEPRECATED __attribute__((__deprecated__)) 116 #else 117 #define PIPE_DEPRECATED 118 #endif 119 120 121 122 /* Macros for data alignment. */ 123 #if defined(__GNUC__) 124 125 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Type-Attributes.html */ 126 #define PIPE_ALIGN_TYPE(_alignment, _type) _type __attribute__((aligned(_alignment))) 127 128 /* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Variable-Attributes.html */ 129 #define PIPE_ALIGN_VAR(_alignment) __attribute__((aligned(_alignment))) 130 131 #if defined(__GNUC__) && defined(PIPE_ARCH_X86) 132 #define PIPE_ALIGN_STACK __attribute__((force_align_arg_pointer)) 133 #else 134 #define PIPE_ALIGN_STACK 135 #endif 136 137 #elif defined(_MSC_VER) 138 139 /* See http://msdn.microsoft.com/en-us/library/83ythb65.aspx */ 140 #define PIPE_ALIGN_TYPE(_alignment, _type) __declspec(align(_alignment)) _type 141 #define PIPE_ALIGN_VAR(_alignment) __declspec(align(_alignment)) 142 143 #define PIPE_ALIGN_STACK 144 145 #elif defined(SWIG) 146 147 #define PIPE_ALIGN_TYPE(_alignment, _type) _type 148 #define PIPE_ALIGN_VAR(_alignment) 149 150 #define PIPE_ALIGN_STACK 151 152 #else 153 154 #error "Unsupported compiler" 155 156 #endif 157 158 /** 159 * Declare a variable on its own cache line. 160 * 161 * This helps eliminate "False sharing" to make atomic operations 162 * on pipe_reference::count faster and/or access to adjacent fields faster. 163 * 164 * https://en.wikipedia.org/wiki/False_sharing 165 * 166 * CALLOC_STRUCT_CL or MALLOC_STRUCT_CL and FREE_CL should be used to allocate 167 * structures that contain this. 168 * 169 * NOTE: Don't use PIPE_ALIGN_VAR because it causes the whole structure to be 170 * aligned, but we only want to align the field. 171 */ 172 #define EXCLUSIVE_CACHELINE(decl) \ 173 union { char __cl_space[CACHE_LINE_SIZE]; \ 174 decl; } 175 176 #if defined(__GNUC__) 177 178 #define PIPE_READ_WRITE_BARRIER() __asm__("":::"memory") 179 180 #elif defined(_MSC_VER) 181 182 #define PIPE_READ_WRITE_BARRIER() _ReadWriteBarrier() 183 184 #else 185 186 #warning "Unsupported compiler" 187 #define PIPE_READ_WRITE_BARRIER() /* */ 188 189 #endif 190 191 #if defined(__cplusplus) 192 } 193 #endif 194 195 196 #endif /* P_COMPILER_H */ 197