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Comparing libev/ev.c (file contents):
Revision 1.448 by root, Tue Jul 24 16:28:08 2012 UTC vs.
Revision 1.453 by root, Thu Feb 28 00:33:25 2013 UTC

… …
357 357
358#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif 360#endif
361 361
362#ifdef ANDROID
363/* supposedly, android doesn't typedef fd_mask */
364# undef EV_USE_SELECT
365# define EV_USE_SELECT 0
366/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367# undef EV_USE_CLOCK_SYSCALL
368# define EV_USE_CLOCK_SYSCALL 0
369#endif
370
371/* aix's poll.h seems to cause lots of trouble */
372#ifdef _AIX
373/* AIX has a completely broken poll.h header */
374# undef EV_USE_POLL
375# define EV_USE_POLL 0
376#endif
377
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 378/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */ 379/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h> 381# include <sys/syscall.h>
366# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
… …
372# define EV_USE_CLOCK_SYSCALL 0 388# define EV_USE_CLOCK_SYSCALL 0
373# endif 389# endif
374#endif 390#endif
375 391
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 392/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383 393
384#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
385# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
386# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
387#endif 397#endif
… …
505 515
506#ifndef ECB_H 516#ifndef ECB_H
507#define ECB_H 517#define ECB_H
508 518
509/* 16 bits major, 16 bits minor */ 519/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001 520#define ECB_VERSION 0x00010002
511 521
512#ifdef _WIN32 522#ifdef _WIN32
513 typedef signed char int8_t; 523 typedef signed char int8_t;
514 typedef unsigned char uint8_t; 524 typedef unsigned char uint8_t;
515 typedef signed short int16_t; 525 typedef signed short int16_t;
… …
530 #else 540 #else
531 #define ECB_PTRSIZE 4 541 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t; 542 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t; 543 typedef int32_t intptr_t;
534 #endif 544 #endif
535 typedef intptr_t ptrdiff_t;
536#else 545#else
537 #include <inttypes.h> 546 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU 547 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8 548 #define ECB_PTRSIZE 8
540 #else 549 #else
… …
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ 569#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L) 570#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L) 571#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0) 572#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L) 573#define ECB_CPP11 (__cplusplus >= 201103L)
574
575#if ECB_CPP
576 #define ECB_EXTERN_C extern "C"
577 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
578 #define ECB_EXTERN_C_END }
579#else
580 #define ECB_EXTERN_C extern
581 #define ECB_EXTERN_C_BEG
582 #define ECB_EXTERN_C_END
583#endif
565 584
566/*****************************************************************************/ 585/*****************************************************************************/
567 586
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 587/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */ 588/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
… …
615 634
616#ifndef ECB_MEMORY_FENCE 635#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7) 636 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */ 637 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 638 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
639
640 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
641 * without risking compile time errors with other compilers. We *could*
642 * define our own ecb_clang_has_feature, but I just can't be bothered to work
643 * around this shit time and again.
620 #elif defined __clang && __has_feature (cxx_atomic) 644 * #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */ 645 * // see comment below (stdatomic.h) about the C11 memory model.
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 646 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
647 */
648
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 649 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize () 650 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 651 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 652 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 653 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
… …
935 ecb_inline void ecb_unreachable (void) ecb_noreturn; 961 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { } 962 ecb_inline void ecb_unreachable (void) { }
937#endif 963#endif
938 964
939/* try to tell the compiler that some condition is definitely true */ 965/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 966#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
941 967
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 968ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char 969ecb_inline unsigned char
944ecb_byteorder_helper (void) 970ecb_byteorder_helper (void)
945{ 971{
946 const uint32_t u = 0x11223344; 972 /* the union code still generates code under pressure in gcc, */
947 return *(unsigned char *)&u; 973 /* but less than using pointers, and always seems to */
974 /* successfully return a constant. */
975 /* the reason why we have this horrible preprocessor mess */
976 /* is to avoid it in all cases, at least on common architectures */
977 /* or when using a recent enough gcc version (>= 4.6) */
978#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
979 return 0x44;
980#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
981 return 0x44;
982#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
983 return 0x11;
984#else
985 union
986 {
987 uint32_t i;
988 uint8_t c;
989 } u = { 0x11223344 };
990 return u.c;
991#endif
948} 992}
949 993
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 994ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 995ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 996ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
… …
981 { 1025 {
982 return N; 1026 return N;
983 } 1027 }
984#else 1028#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1029 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1030#endif
1031
1032/*******************************************************************************/
1033/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1034
1035/* basically, everything uses "ieee pure-endian" floating point numbers */
1036/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1037#if 0 \
1038 || __i386 || __i386__ \
1039 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1040 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1041 || defined __arm__ && defined __ARM_EABI__ \
1042 || defined __s390__ || defined __s390x__ \
1043 || defined __mips__ \
1044 || defined __alpha__ \
1045 || defined __hppa__ \
1046 || defined __ia64__ \
1047 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1048 #define ECB_STDFP 1
1049 #include <string.h> /* for memcpy */
1050#else
1051 #define ECB_STDFP 0
1052 #include <math.h> /* for frexp*, ldexp* */
1053#endif
1054
1055#ifndef ECB_NO_LIBM
1056
1057 /* convert a float to ieee single/binary32 */
1058 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1059 ecb_function_ uint32_t
1060 ecb_float_to_binary32 (float x)
1061 {
1062 uint32_t r;
1063
1064 #if ECB_STDFP
1065 memcpy (&r, &x, 4);
1066 #else
1067 /* slow emulation, works for anything but -0 */
1068 uint32_t m;
1069 int e;
1070
1071 if (x == 0e0f ) return 0x00000000U;
1072 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1073 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1074 if (x != x ) return 0x7fbfffffU;
1075
1076 m = frexpf (x, &e) * 0x1000000U;
1077
1078 r = m & 0x80000000U;
1079
1080 if (r)
1081 m = -m;
1082
1083 if (e <= -126)
1084 {
1085 m &= 0xffffffU;
1086 m >>= (-125 - e);
1087 e = -126;
1088 }
1089
1090 r |= (e + 126) << 23;
1091 r |= m & 0x7fffffU;
1092 #endif
1093
1094 return r;
1095 }
1096
1097 /* converts an ieee single/binary32 to a float */
1098 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1099 ecb_function_ float
1100 ecb_binary32_to_float (uint32_t x)
1101 {
1102 float r;
1103
1104 #if ECB_STDFP
1105 memcpy (&r, &x, 4);
1106 #else
1107 /* emulation, only works for normals and subnormals and +0 */
1108 int neg = x >> 31;
1109 int e = (x >> 23) & 0xffU;
1110
1111 x &= 0x7fffffU;
1112
1113 if (e)
1114 x |= 0x800000U;
1115 else
1116 e = 1;
1117
1118 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1119 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1120
1121 r = neg ? -r : r;
1122 #endif
1123
1124 return r;
1125 }
1126
1127 /* convert a double to ieee double/binary64 */
1128 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1129 ecb_function_ uint64_t
1130 ecb_double_to_binary64 (double x)
1131 {
1132 uint64_t r;
1133
1134 #if ECB_STDFP
1135 memcpy (&r, &x, 8);
1136 #else
1137 /* slow emulation, works for anything but -0 */
1138 uint64_t m;
1139 int e;
1140
1141 if (x == 0e0 ) return 0x0000000000000000U;
1142 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1143 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1144 if (x != x ) return 0X7ff7ffffffffffffU;
1145
1146 m = frexp (x, &e) * 0x20000000000000U;
1147
1148 r = m & 0x8000000000000000;;
1149
1150 if (r)
1151 m = -m;
1152
1153 if (e <= -1022)
1154 {
1155 m &= 0x1fffffffffffffU;
1156 m >>= (-1021 - e);
1157 e = -1022;
1158 }
1159
1160 r |= ((uint64_t)(e + 1022)) << 52;
1161 r |= m & 0xfffffffffffffU;
1162 #endif
1163
1164 return r;
1165 }
1166
1167 /* converts an ieee double/binary64 to a double */
1168 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1169 ecb_function_ double
1170 ecb_binary64_to_double (uint64_t x)
1171 {
1172 double r;
1173
1174 #if ECB_STDFP
1175 memcpy (&r, &x, 8);
1176 #else
1177 /* emulation, only works for normals and subnormals and +0 */
1178 int neg = x >> 63;
1179 int e = (x >> 52) & 0x7ffU;
1180
1181 x &= 0xfffffffffffffU;
1182
1183 if (e)
1184 x |= 0x10000000000000U;
1185 else
1186 e = 1;
1187
1188 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1189 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1190
1191 r = neg ? -r : r;
1192 #endif
1193
1194 return r;
1195 }
1196
986#endif 1197#endif
987 1198
988#endif 1199#endif
989 1200
990/* ECB.H END */ 1201/* ECB.H END */
… …
2028 2239
2029void 2240void
2030ev_feed_signal (int signum) EV_THROW 2241ev_feed_signal (int signum) EV_THROW
2031{ 2242{
2032#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
2244 EV_P;
2245 ECB_MEMORY_FENCE_ACQUIRE;
2033 EV_P = signals [signum - 1].loop; 2246 EV_A = signals [signum - 1].loop;
2034 2247
2035 if (!EV_A) 2248 if (!EV_A)
2036 return; 2249 return;
2037#endif 2250#endif
2038 2251
… …
3526#if EV_MULTIPLICITY 3739#if EV_MULTIPLICITY
3527 assert (("libev: a signal must not be attached to two different loops", 3740 assert (("libev: a signal must not be attached to two different loops",
3528 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3741 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3529 3742
3530 signals [w->signum - 1].loop = EV_A; 3743 signals [w->signum - 1].loop = EV_A;
3744 ECB_MEMORY_FENCE_RELEASE;
3531#endif 3745#endif
3532 3746
3533 EV_FREQUENT_CHECK; 3747 EV_FREQUENT_CHECK;
3534 3748
3535#if EV_USE_SIGNALFD 3749#if EV_USE_SIGNALFD
… …
3690# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3904# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3691 3905
3692static void noinline 3906static void noinline
3693infy_add (EV_P_ ev_stat *w) 3907infy_add (EV_P_ ev_stat *w)
3694{ 3908{
3695 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 3909 w->wd = inotify_add_watch (fs_fd, w->path,
3910 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3911 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3912 | IN_DONT_FOLLOW | IN_MASK_ADD);
3696 3913
3697 if (w->wd >= 0) 3914 if (w->wd >= 0)
3698 { 3915 {
3699 struct statfs sfs; 3916 struct statfs sfs;
3700 3917
… …
3704 3921
3705 if (!fs_2625) 3922 if (!fs_2625)
3706 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3923 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3707 else if (!statfs (w->path, &sfs) 3924 else if (!statfs (w->path, &sfs)
3708 && (sfs.f_type == 0x1373 /* devfs */ 3925 && (sfs.f_type == 0x1373 /* devfs */
3926 || sfs.f_type == 0x4006 /* fat */
3927 || sfs.f_type == 0x4d44 /* msdos */
3709 || sfs.f_type == 0xEF53 /* ext2/3 */ 3928 || sfs.f_type == 0xEF53 /* ext2/3 */
3929 || sfs.f_type == 0x72b6 /* jffs2 */
3930 || sfs.f_type == 0x858458f6 /* ramfs */
3931 || sfs.f_type == 0x5346544e /* ntfs */
3710 || sfs.f_type == 0x3153464a /* jfs */ 3932 || sfs.f_type == 0x3153464a /* jfs */
3933 || sfs.f_type == 0x9123683e /* btrfs */
3711 || sfs.f_type == 0x52654973 /* reiser3 */ 3934 || sfs.f_type == 0x52654973 /* reiser3 */
3712 || sfs.f_type == 0x01021994 /* tempfs */ 3935 || sfs.f_type == 0x01021994 /* tmpfs */
3713 || sfs.f_type == 0x58465342 /* xfs */)) 3936 || sfs.f_type == 0x58465342 /* xfs */))
3714 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3937 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3715 else 3938 else
3716 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3939 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3717 } 3940 }

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