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Comparing libecb/ecb.h (file contents):
Revision 1.126 by root, Sun Jan 5 02:58:29 2014 UTC vs.
Revision 1.129 by root, Thu Mar 20 22:04:29 2014 UTC

1/* 1/*
2 * libecb - http://software.schmorp.de/pkg/libecb 2 * libecb - http://software.schmorp.de/pkg/libecb
3 * 3 *
4 * Copyright (©) 2009-2013 Marc Alexander Lehmann <libecb@schmorp.de> 4 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
5 * Copyright (©) 2011 Emanuele Giaquinta 5 * Copyright (©) 2011 Emanuele Giaquinta
6 * All rights reserved. 6 * All rights reserved.
7 * 7 *
8 * Redistribution and use in source and binary forms, with or without modifica- 8 * Redistribution and use in source and binary forms, with or without modifica-
9 * tion, are permitted provided that the following conditions are met: 9 * tion, are permitted provided that the following conditions are met:
… …
87 #else 87 #else
88 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 88 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
89 #endif 89 #endif
90#endif 90#endif
91 91
92#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
93#define ECB_C99 (__STDC_VERSION__ >= 199901L)
94#define ECB_C11 (__STDC_VERSION__ >= 201112L)
95#define ECB_CPP (__cplusplus+0) 92#define ECB_CPP (__cplusplus+0)
96#define ECB_CPP11 (__cplusplus >= 201103L) 93#define ECB_CPP11 (__cplusplus >= 201103L)
94
95#if ECB_CPP
96 #define ECB_C 0
97 #define ECB_STDC_VERSION 0
98#else
99 #define ECB_C 1
100 #define ECB_STDC_VERSION __STDC_VERSION__
101#endif
102
103#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
104#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
97 105
98#if ECB_CPP 106#if ECB_CPP
99 #define ECB_EXTERN_C extern "C" 107 #define ECB_EXTERN_C extern "C"
100 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 108 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
101 #define ECB_EXTERN_C_END } 109 #define ECB_EXTERN_C_END }
… …
134 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 142 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 143 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
136 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 144 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
137 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 145 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
138 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 146 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
147 #elif __aarch64__
148 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
139 #elif (__sparc || __sparc__) && !__sparcv8 149 #elif (__sparc || __sparc__) && !__sparcv8
140 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 150 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
141 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 151 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 152 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
143 #elif defined __s390__ || defined __s390x__ 153 #elif defined __s390__ || defined __s390x__
… …
165 175
166#ifndef ECB_MEMORY_FENCE 176#ifndef ECB_MEMORY_FENCE
167 #if ECB_GCC_VERSION(4,7) 177 #if ECB_GCC_VERSION(4,7)
168 /* see comment below (stdatomic.h) about the C11 memory model. */ 178 /* see comment below (stdatomic.h) about the C11 memory model. */
169 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 179 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
180 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
181 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
170 182
171 /* The __has_feature syntax from clang is so misdesigned that we cannot use it 183 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
172 * without risking compile time errors with other compilers. We *could* 184 * without risking compile time errors with other compilers. We *could*
173 * define our own ecb_clang_has_feature, but I just can't be bothered to work 185 * define our own ecb_clang_has_feature, but I just can't be bothered to work
174 * around this shit time and again. 186 * around this shit time and again.
175 * #elif defined __clang && __has_feature (cxx_atomic) 187 * #elif defined __clang && __has_feature (cxx_atomic)
176 * // see comment below (stdatomic.h) about the C11 memory model. 188 * // see comment below (stdatomic.h) about the C11 memory model.
177 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 189 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
190 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
191 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
178 */ 192 */
179 193
180 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 194 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
181 #define ECB_MEMORY_FENCE __sync_synchronize () 195 #define ECB_MEMORY_FENCE __sync_synchronize ()
182 #elif _MSC_VER >= 1500 /* VC++ 2008 */ 196 #elif _MSC_VER >= 1500 /* VC++ 2008 */
… …
212 /* any fence other than seq_cst, which isn't very efficient for us. */ 226 /* any fence other than seq_cst, which isn't very efficient for us. */
213 /* Why that is, we don't know - either the C11 memory model is quite useless */ 227 /* Why that is, we don't know - either the C11 memory model is quite useless */
214 /* for most usages, or gcc and clang have a bug */ 228 /* for most usages, or gcc and clang have a bug */
215 /* I *currently* lean towards the latter, and inefficiently implement */ 229 /* I *currently* lean towards the latter, and inefficiently implement */
216 /* all three of ecb's fences as a seq_cst fence */ 230 /* all three of ecb's fences as a seq_cst fence */
231 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
232 /* for all __atomic_thread_fence's except seq_cst */
217 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst) 233 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
218 #endif 234 #endif
219#endif 235#endif
220 236
221#ifndef ECB_MEMORY_FENCE 237#ifndef ECB_MEMORY_FENCE
… …
278 #define ecb_is_constant(expr) __builtin_constant_p (expr) 294 #define ecb_is_constant(expr) __builtin_constant_p (expr)
279 #define ecb_expect(expr,value) __builtin_expect ((expr),(value)) 295 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
280 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) 296 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
281#else 297#else
282 #define ecb_attribute(attrlist) 298 #define ecb_attribute(attrlist)
299
300 /* possible C11 impl for integral types
301 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
302 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
303
283 #define ecb_is_constant(expr) 0 304 #define ecb_is_constant(expr) 0
284 #define ecb_expect(expr,value) (expr) 305 #define ecb_expect(expr,value) (expr)
285 #define ecb_prefetch(addr,rw,locality) 306 #define ecb_prefetch(addr,rw,locality)
286#endif 307#endif
287 308

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