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Comparing libecb/ecb.h (file contents):
Revision 1.88 by root, Mon May 28 08:40:25 2012 UTC vs.
Revision 1.94 by root, Tue May 29 21:03:20 2012 UTC

… …
54 #else 54 #else
55 #define ECB_PTRSIZE 4 55 #define ECB_PTRSIZE 4
56 typedef uint32_t uintptr_t; 56 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t; 57 typedef int32_t intptr_t;
58 #endif 58 #endif
59 typedef intptr_t ptrdiff_t;
59#else 60#else
60 #include <inttypes.h> 61 #include <inttypes.h>
61 #if UINTMAX_MAX > 0xffffffffU 62 #if UINTMAX_MAX > 0xffffffffU
62 #define ECB_PTRSIZE 8 63 #define ECB_PTRSIZE 8
63 #else 64 #else
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78 #else 79 #else
79 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))) 80 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
80 #endif 81 #endif
81#endif 82#endif
82 83
84#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
85#define ECB_C99 (__STDC_VERSION__ >= 199901L)
86#define ECB_C11 (__STDC_VERSION__ >= 201112L)
87#define ECB_CPP (__cplusplus+0)
88#define ECB_CPP98 (__cplusplus >= 199711L)
89#define ECB_CPP11 (__cplusplus >= 201103L)
90
83/*****************************************************************************/ 91/*****************************************************************************/
84 92
85/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 93/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
86/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 94/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
87 95
88#if ECB_NO_THREADS 96#if ECB_NO_THREADS
89# define ECB_NO_SMP 1 97# define ECB_NO_SMP 1
90#endif 98#endif
91 99
92#if ECB_NO_THREADS || ECB_NO_SMP 100#if ECB_NO_SMP
93 #define ECB_MEMORY_FENCE do { } while (0) 101 #define ECB_MEMORY_FENCE do { } while (0)
94#endif 102#endif
95 103
96#ifndef ECB_MEMORY_FENCE 104#ifndef ECB_MEMORY_FENCE
97 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 105 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
98 #if __i386 || __i386__ 106 #if __i386 || __i386__
99 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 107 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
100 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 108 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
101 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 109 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
102 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 110 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
103 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 111 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
104 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 112 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
105 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 113 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
106 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 114 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
107 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 115 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
108 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 116 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
109 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 117 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
110 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 118 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
111 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 119 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
112 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 120 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
113 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 121 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
114 #elif __sparc || __sparc__ 122 #elif __sparc || __sparc__
115 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") 123 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
116 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 124 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
117 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 125 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
118 #elif defined __s390__ || defined __s390x__ 126 #elif defined __s390__ || defined __s390x__
119 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 127 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
120 #elif defined __mips__ 128 #elif defined __mips__
121 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 129 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
122 #elif defined __alpha__ 130 #elif defined __alpha__
123 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory") 131 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
132 #elif defined __hppa__
133 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
134 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
135 #elif defined __ia64__
136 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
124 #endif 137 #endif
125 #endif 138 #endif
126#endif 139#endif
127 140
128#ifndef ECB_MEMORY_FENCE 141#ifndef ECB_MEMORY_FENCE
142 #if ECB_GCC_VERSION(4,7)
143 /* see comment below about the C11 memory model. in short - avoid */
144 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
145 #elif defined __clang && __has_feature (cxx_atomic)
146 /* see above */
147 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
129 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 148 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
130 #define ECB_MEMORY_FENCE __sync_synchronize () 149 #define ECB_MEMORY_FENCE __sync_synchronize ()
131 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 150 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
132 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 151 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
133 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 152 #elif _MSC_VER >= 1400 /* VC++ 2005 */
134 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 153 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
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147 #define ECB_MEMORY_FENCE __sync () 166 #define ECB_MEMORY_FENCE __sync ()
148 #endif 167 #endif
149#endif 168#endif
150 169
151#ifndef ECB_MEMORY_FENCE 170#ifndef ECB_MEMORY_FENCE
171 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
172 /* we assume that these memory fences work on all variables/all memory accesses, */
173 /* not just C11 atomics and atomic accesses */
174 #include <stdatomic.h>
175 /* unfortunately, the C11 memory model seems to be very limited, and unable to express */
176 /* simple barrier semantics. That means we need to take out thor's hammer. */
177 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
178 #endif
179 #endif
180#endif
181
182#ifndef ECB_MEMORY_FENCE
152 #if !ECB_AVOID_PTHREADS 183 #if !ECB_AVOID_PTHREADS
153 /* 184 /*
154 * if you get undefined symbol references to pthread_mutex_lock, 185 * if you get undefined symbol references to pthread_mutex_lock,
155 * or failure to find pthread.h, then you should implement 186 * or failure to find pthread.h, then you should implement
156 * the ECB_MEMORY_FENCE operations for your cpu/compiler 187 * the ECB_MEMORY_FENCE operations for your cpu/compiler
… …
174 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 205 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
175#endif 206#endif
176 207
177/*****************************************************************************/ 208/*****************************************************************************/
178 209
179#define ECB_C99 (__STDC_VERSION__ >= 199901L)
180
181#if __cplusplus 210#if __cplusplus
182 #define ecb_inline static inline 211 #define ecb_inline static inline
183#elif ECB_GCC_VERSION(2,5) 212#elif ECB_GCC_VERSION(2,5)
184 #define ecb_inline static __inline__ 213 #define ecb_inline static __inline__
185#elif ECB_C99 214#elif ECB_C99
… …
223#elif ECB_GCC_VERSION(3,0) 252#elif ECB_GCC_VERSION(3,0)
224 #define ecb_decltype(x) __typeof(x) 253 #define ecb_decltype(x) __typeof(x)
225#endif 254#endif
226 255
227#define ecb_noinline ecb_attribute ((__noinline__)) 256#define ecb_noinline ecb_attribute ((__noinline__))
228#define ecb_noreturn ecb_attribute ((__noreturn__))
229#define ecb_unused ecb_attribute ((__unused__)) 257#define ecb_unused ecb_attribute ((__unused__))
230#define ecb_const ecb_attribute ((__const__)) 258#define ecb_const ecb_attribute ((__const__))
231#define ecb_pure ecb_attribute ((__pure__)) 259#define ecb_pure ecb_attribute ((__pure__))
260
261#if ECB_C11
262 #define ecb_noreturn _Noreturn
263#else
264 #define ecb_noreturn ecb_attribute ((__noreturn__))
265#endif
232 266
233#if ECB_GCC_VERSION(4,3) 267#if ECB_GCC_VERSION(4,3)
234 #define ecb_artificial ecb_attribute ((__artificial__)) 268 #define ecb_artificial ecb_attribute ((__artificial__))
235 #define ecb_hot ecb_attribute ((__hot__)) 269 #define ecb_hot ecb_attribute ((__hot__))
236 #define ecb_cold ecb_attribute ((__cold__)) 270 #define ecb_cold ecb_attribute ((__cold__))

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