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Comparing libecb/ecb.h (file contents):
Revision 1.80 by root, Wed Feb 22 01:52:42 2012 UTC vs.
Revision 1.93 by root, Tue May 29 19:10:50 2012 UTC

… …
28 */ 28 */
29 29
30#ifndef ECB_H 30#ifndef ECB_H
31#define ECB_H 31#define ECB_H
32 32
33/* 16 bits major, 16 bits minor */
34#define ECB_VERSION 0x00010001
35
33#ifdef _WIN32 36#ifdef _WIN32
34 typedef signed char int8_t; 37 typedef signed char int8_t;
35 typedef unsigned char uint8_t; 38 typedef unsigned char uint8_t;
36 typedef signed short int16_t; 39 typedef signed short int16_t;
37 typedef unsigned short uint16_t; 40 typedef unsigned short uint16_t;
… …
42 typedef unsigned long long uint64_t; 45 typedef unsigned long long uint64_t;
43 #else /* _MSC_VER || __BORLANDC__ */ 46 #else /* _MSC_VER || __BORLANDC__ */
44 typedef signed __int64 int64_t; 47 typedef signed __int64 int64_t;
45 typedef unsigned __int64 uint64_t; 48 typedef unsigned __int64 uint64_t;
46 #endif 49 #endif
50 #ifdef _WIN64
51 #define ECB_PTRSIZE 8
52 typedef uint64_t uintptr_t;
53 typedef int64_t intptr_t;
54 #else
55 #define ECB_PTRSIZE 4
56 typedef uint32_t uintptr_t;
57 typedef int32_t intptr_t;
58 #endif
59 typedef intptr_t ptrdiff_t;
47#else 60#else
48 #include <inttypes.h> 61 #include <inttypes.h>
62 #if UINTMAX_MAX > 0xffffffffU
63 #define ECB_PTRSIZE 8
64 #else
65 #define ECB_PTRSIZE 4
66 #endif
49#endif 67#endif
50 68
51/* many compilers define _GNUC_ to some versions but then only implement 69/* many compilers define _GNUC_ to some versions but then only implement
52 * what their idiot authors think are the "more important" extensions, 70 * what their idiot authors think are the "more important" extensions,
53 * causing enormous grief in return for some better fake benchmark numbers. 71 * causing enormous grief in return for some better fake benchmark numbers.
54 * or so. 72 * or so.
55 * we try to detect these and simply assume they are not gcc - if they have 73 * we try to detect these and simply assume they are not gcc - if they have
56 * an issue with that they should have done it right in the first place. 74 * an issue with that they should have done it right in the first place.
57 */ 75 */
58#ifndef ECB_GCC_VERSION 76#ifndef ECB_GCC_VERSION
59 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__) 77 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
60 #define ECB_GCC_VERSION(major,minor) 0 78 #define ECB_GCC_VERSION(major,minor) 0
61 #else 79 #else
62 #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)))
63 #endif 81 #endif
64#endif 82#endif
65 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
66/*****************************************************************************/ 91/*****************************************************************************/
67 92
68/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 93/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
69/* 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 */
70 95
71#if ECB_NO_THREADS 96#if ECB_NO_THREADS
72# define ECB_NO_SMP 1 97# define ECB_NO_SMP 1
73#endif 98#endif
74 99
75#if ECB_NO_THREADS || ECB_NO_SMP 100#if ECB_NO_SMP
76 #define ECB_MEMORY_FENCE do { } while (0) 101 #define ECB_MEMORY_FENCE do { } while (0)
77#endif 102#endif
78 103
79#ifndef ECB_MEMORY_FENCE 104#ifndef ECB_MEMORY_FENCE
105 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
106 /* we assume that these memory fences work on all variables/all memory accesses, */
107 /* not just C11 atomics and atomic accesses */
108 #include <stdatomic.h>
109 #if 0
110 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_acq_rel)
111 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
112 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
113 #else
114 /* the above *should* be enough in my book, but after experiences with gcc-4.7 */
115 /* and clang, better play safe */
116 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
117 #endif
118 #endif
119#endif
120
121#ifndef ECB_MEMORY_FENCE
80 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 122 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
81 #if __i386 || __i386__ 123 #if __i386 || __i386__
82 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 124 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
83 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */ 125 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
84 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */ 126 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
85 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ 127 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
86 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 128 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
87 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory") 129 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
88 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */ 130 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
89 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 131 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
90 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 132 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
91 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \ 133 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
92 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) 134 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
93 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 135 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
94 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \ 136 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
95 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ ) 137 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
96 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 138 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
97 #elif __sparc || __sparc__ 139 #elif __sparc || __sparc__
98 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory") 140 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
99 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") 141 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
100 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") 142 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
101 #elif defined(__s390__) || defined(__s390x__) 143 #elif defined __s390__ || defined __s390x__
102 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") 144 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
103 #elif defined(__mips__) 145 #elif defined __mips__
104 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 146 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
147 #elif defined __alpha__
148 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
105 #endif 149 #endif
106 #endif 150 #endif
107#endif 151#endif
108 152
109#ifndef ECB_MEMORY_FENCE 153#ifndef ECB_MEMORY_FENCE
154 #if ECB_GCC_VERSION(4,7)
155 /* unsolved mystery: ACQ_REL should be enough, but doesn't generate any code */
156 /* which in turn actually breaks libev */
157 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
158 #elif defined __clang && __has_feature (cxx_atomic)
159 /* see above */
160 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
110 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__) 161 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
111 #define ECB_MEMORY_FENCE __sync_synchronize () 162 #define ECB_MEMORY_FENCE __sync_synchronize ()
112 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */ 163 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
113 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */ 164 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
114 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 165 #elif _MSC_VER >= 1400 /* VC++ 2005 */
115 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 166 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
116 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 167 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
117 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */ 168 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
118 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier () 169 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
119 #elif defined(_WIN32) 170 #elif defined _WIN32
120 #include <WinNT.h> 171 #include <WinNT.h>
121 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */ 172 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
122 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 173 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
123 #include <mbarrier.h> 174 #include <mbarrier.h>
124 #define ECB_MEMORY_FENCE __machine_rw_barrier () 175 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
125 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier () 176 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
126 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier () 177 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
178 #elif __xlC__
179 #define ECB_MEMORY_FENCE __sync ()
127 #endif 180 #endif
128#endif 181#endif
129 182
130#ifndef ECB_MEMORY_FENCE 183#ifndef ECB_MEMORY_FENCE
131 #if !ECB_AVOID_PTHREADS 184 #if !ECB_AVOID_PTHREADS
… …
143 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER; 196 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
144 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0) 197 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
145 #endif 198 #endif
146#endif 199#endif
147 200
148#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE) 201#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
149 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE 202 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
150#endif 203#endif
151 204
152#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE) 205#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
153 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE 206 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
154#endif 207#endif
155 208
156/*****************************************************************************/ 209/*****************************************************************************/
157
158#define ECB_C99 (__STDC_VERSION__ >= 199901L)
159 210
160#if __cplusplus 211#if __cplusplus
161 #define ecb_inline static inline 212 #define ecb_inline static inline
162#elif ECB_GCC_VERSION(2,5) 213#elif ECB_GCC_VERSION(2,5)
163 #define ecb_inline static __inline__ 214 #define ecb_inline static __inline__
… …
202#elif ECB_GCC_VERSION(3,0) 253#elif ECB_GCC_VERSION(3,0)
203 #define ecb_decltype(x) __typeof(x) 254 #define ecb_decltype(x) __typeof(x)
204#endif 255#endif
205 256
206#define ecb_noinline ecb_attribute ((__noinline__)) 257#define ecb_noinline ecb_attribute ((__noinline__))
207#define ecb_noreturn ecb_attribute ((__noreturn__))
208#define ecb_unused ecb_attribute ((__unused__)) 258#define ecb_unused ecb_attribute ((__unused__))
209#define ecb_const ecb_attribute ((__const__)) 259#define ecb_const ecb_attribute ((__const__))
210#define ecb_pure ecb_attribute ((__pure__)) 260#define ecb_pure ecb_attribute ((__pure__))
261
262#if ECB_C11
263 #define ecb_noreturn _Noreturn
264#else
265 #define ecb_noreturn ecb_attribute ((__noreturn__))
266#endif
211 267
212#if ECB_GCC_VERSION(4,3) 268#if ECB_GCC_VERSION(4,3)
213 #define ecb_artificial ecb_attribute ((__artificial__)) 269 #define ecb_artificial ecb_attribute ((__artificial__))
214 #define ecb_hot ecb_attribute ((__hot__)) 270 #define ecb_hot ecb_attribute ((__hot__))
215 #define ecb_cold ecb_attribute ((__cold__)) 271 #define ecb_cold ecb_attribute ((__cold__))
… …
306 362
307 return r + ecb_ld32 (x); 363 return r + ecb_ld32 (x);
308 } 364 }
309#endif 365#endif
310 366
367ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
368ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
369ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
370ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
371
311ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; 372ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
312ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) 373ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
313{ 374{
314 return ( (x * 0x0802U & 0x22110U) 375 return ( (x * 0x0802U & 0x22110U)
315 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; 376 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;

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