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Comparing libev/ev.c (file contents):
Revision 1.449 by root, Sun Sep 23 21:21:58 2012 UTC vs.
Revision 1.455 by root, Sun Apr 28 12:45:20 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 0x00010003
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
541 #define ECB_PTRSIZE 4 550 #define ECB_PTRSIZE 4
551 #endif
552#endif
553
554/* work around x32 idiocy by defining proper macros */
555#if __x86_64 || _M_AMD64
556 #if __ILP32
557 #define ECB_AMD64_X32 1
558 #else
559 #define ECB_AMD64 1
542 #endif 560 #endif
543#endif 561#endif
544 562
545/* many compilers define _GNUC_ to some versions but then only implement 563/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions, 564 * what their idiot authors think are the "more important" extensions,
… …
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */ 578#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L) 579#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L) 580#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0) 581#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L) 582#define ECB_CPP11 (__cplusplus >= 201103L)
583
584#if ECB_CPP
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
588#else
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
592#endif
565 593
566/*****************************************************************************/ 594/*****************************************************************************/
567 595
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */ 596/* 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 */ 597/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
… …
615 643
616#ifndef ECB_MEMORY_FENCE 644#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7) 645 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */ 646 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) 647 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
648
649 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
650 * without risking compile time errors with other compilers. We *could*
651 * define our own ecb_clang_has_feature, but I just can't be bothered to work
652 * around this shit time and again.
620 #elif defined __clang && __has_feature (cxx_atomic) 653 * #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */ 654 * // see comment below (stdatomic.h) about the C11 memory model.
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) 655 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
656 */
657
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ 658 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize () 659 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */ 660 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier) 661 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier () 662 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
… …
935 ecb_inline void ecb_unreachable (void) ecb_noreturn; 970 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { } 971 ecb_inline void ecb_unreachable (void) { }
937#endif 972#endif
938 973
939/* try to tell the compiler that some condition is definitely true */ 974/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) 975#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
941 976
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; 977ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char 978ecb_inline unsigned char
944ecb_byteorder_helper (void) 979ecb_byteorder_helper (void)
945{ 980{
946 const uint32_t u = 0x11223344; 981 /* the union code still generates code under pressure in gcc, */
947 return *(unsigned char *)&u; 982 /* but less than using pointers, and always seems to */
983 /* successfully return a constant. */
984 /* the reason why we have this horrible preprocessor mess */
985 /* is to avoid it in all cases, at least on common architectures */
986 /* or when using a recent enough gcc version (>= 4.6) */
987#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
988 return 0x44;
989#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
990 return 0x44;
991#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
992 return 0x11;
993#else
994 union
995 {
996 uint32_t i;
997 uint8_t c;
998 } u = { 0x11223344 };
999 return u.c;
1000#endif
948} 1001}
949 1002
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const; 1003ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 1004ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const; 1005ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
… …
981 { 1034 {
982 return N; 1035 return N;
983 } 1036 }
984#else 1037#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 1038 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1039#endif
1040
1041/*******************************************************************************/
1042/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1043
1044/* basically, everything uses "ieee pure-endian" floating point numbers */
1045/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1046#if 0 \
1047 || __i386 || __i386__ \
1048 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1049 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1050 || defined __arm__ && defined __ARM_EABI__ \
1051 || defined __s390__ || defined __s390x__ \
1052 || defined __mips__ \
1053 || defined __alpha__ \
1054 || defined __hppa__ \
1055 || defined __ia64__ \
1056 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1057 #define ECB_STDFP 1
1058 #include <string.h> /* for memcpy */
1059#else
1060 #define ECB_STDFP 0
1061 #include <math.h> /* for frexp*, ldexp* */
1062#endif
1063
1064#ifndef ECB_NO_LIBM
1065
1066 /* convert a float to ieee single/binary32 */
1067 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1068 ecb_function_ uint32_t
1069 ecb_float_to_binary32 (float x)
1070 {
1071 uint32_t r;
1072
1073 #if ECB_STDFP
1074 memcpy (&r, &x, 4);
1075 #else
1076 /* slow emulation, works for anything but -0 */
1077 uint32_t m;
1078 int e;
1079
1080 if (x == 0e0f ) return 0x00000000U;
1081 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1082 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1083 if (x != x ) return 0x7fbfffffU;
1084
1085 m = frexpf (x, &e) * 0x1000000U;
1086
1087 r = m & 0x80000000U;
1088
1089 if (r)
1090 m = -m;
1091
1092 if (e <= -126)
1093 {
1094 m &= 0xffffffU;
1095 m >>= (-125 - e);
1096 e = -126;
1097 }
1098
1099 r |= (e + 126) << 23;
1100 r |= m & 0x7fffffU;
1101 #endif
1102
1103 return r;
1104 }
1105
1106 /* converts an ieee single/binary32 to a float */
1107 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1108 ecb_function_ float
1109 ecb_binary32_to_float (uint32_t x)
1110 {
1111 float r;
1112
1113 #if ECB_STDFP
1114 memcpy (&r, &x, 4);
1115 #else
1116 /* emulation, only works for normals and subnormals and +0 */
1117 int neg = x >> 31;
1118 int e = (x >> 23) & 0xffU;
1119
1120 x &= 0x7fffffU;
1121
1122 if (e)
1123 x |= 0x800000U;
1124 else
1125 e = 1;
1126
1127 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1128 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1129
1130 r = neg ? -r : r;
1131 #endif
1132
1133 return r;
1134 }
1135
1136 /* convert a double to ieee double/binary64 */
1137 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1138 ecb_function_ uint64_t
1139 ecb_double_to_binary64 (double x)
1140 {
1141 uint64_t r;
1142
1143 #if ECB_STDFP
1144 memcpy (&r, &x, 8);
1145 #else
1146 /* slow emulation, works for anything but -0 */
1147 uint64_t m;
1148 int e;
1149
1150 if (x == 0e0 ) return 0x0000000000000000U;
1151 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1152 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1153 if (x != x ) return 0X7ff7ffffffffffffU;
1154
1155 m = frexp (x, &e) * 0x20000000000000U;
1156
1157 r = m & 0x8000000000000000;;
1158
1159 if (r)
1160 m = -m;
1161
1162 if (e <= -1022)
1163 {
1164 m &= 0x1fffffffffffffU;
1165 m >>= (-1021 - e);
1166 e = -1022;
1167 }
1168
1169 r |= ((uint64_t)(e + 1022)) << 52;
1170 r |= m & 0xfffffffffffffU;
1171 #endif
1172
1173 return r;
1174 }
1175
1176 /* converts an ieee double/binary64 to a double */
1177 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1178 ecb_function_ double
1179 ecb_binary64_to_double (uint64_t x)
1180 {
1181 double r;
1182
1183 #if ECB_STDFP
1184 memcpy (&r, &x, 8);
1185 #else
1186 /* emulation, only works for normals and subnormals and +0 */
1187 int neg = x >> 63;
1188 int e = (x >> 52) & 0x7ffU;
1189
1190 x &= 0xfffffffffffffU;
1191
1192 if (e)
1193 x |= 0x10000000000000U;
1194 else
1195 e = 1;
1196
1197 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1198 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1199
1200 r = neg ? -r : r;
1201 #endif
1202
1203 return r;
1204 }
1205
986#endif 1206#endif
987 1207
988#endif 1208#endif
989 1209
990/* ECB.H END */ 1210/* ECB.H END */
… …
1884 ev_syserr ("(libev) error creating signal/async pipe"); 2104 ev_syserr ("(libev) error creating signal/async pipe");
1885 2105
1886 fd_intern (fds [0]); 2106 fd_intern (fds [0]);
1887 } 2107 }
1888 2108
1889 fd_intern (fds [1]);
1890
1891 evpipe [0] = fds [0]; 2109 evpipe [0] = fds [0];
1892 2110
1893 if (evpipe [1] < 0) 2111 if (evpipe [1] < 0)
1894 evpipe [1] = fds [1]; /* first call, set write fd */ 2112 evpipe [1] = fds [1]; /* first call, set write fd */
1895 else 2113 else
… …
1900 /* so must not be executed on windows */ 2118 /* so must not be executed on windows */
1901 2119
1902 dup2 (fds [1], evpipe [1]); 2120 dup2 (fds [1], evpipe [1]);
1903 close (fds [1]); 2121 close (fds [1]);
1904 } 2122 }
2123
2124 fd_intern (evpipe [1]);
1905 2125
1906 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ); 2126 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
1907 ev_io_start (EV_A_ &pipe_w); 2127 ev_io_start (EV_A_ &pipe_w);
1908 ev_unref (EV_A); /* watcher should not keep loop alive */ 2128 ev_unref (EV_A); /* watcher should not keep loop alive */
1909 } 2129 }
… …
2028 2248
2029void 2249void
2030ev_feed_signal (int signum) EV_THROW 2250ev_feed_signal (int signum) EV_THROW
2031{ 2251{
2032#if EV_MULTIPLICITY 2252#if EV_MULTIPLICITY
2253 EV_P;
2033 ECB_MEMORY_FENCE_ACQUIRE; 2254 ECB_MEMORY_FENCE_ACQUIRE;
2034 EV_P = signals [signum - 1].loop; 2255 EV_A = signals [signum - 1].loop;
2035 2256
2036 if (!EV_A) 2257 if (!EV_A)
2037 return; 2258 return;
2038#endif 2259#endif
2039 2260
… …
3692# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3913# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3693 3914
3694static void noinline 3915static void noinline
3695infy_add (EV_P_ ev_stat *w) 3916infy_add (EV_P_ ev_stat *w)
3696{ 3917{
3697 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); 3918 w->wd = inotify_add_watch (fs_fd, w->path,
3919 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3920 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3921 | IN_DONT_FOLLOW | IN_MASK_ADD);
3698 3922
3699 if (w->wd >= 0) 3923 if (w->wd >= 0)
3700 { 3924 {
3701 struct statfs sfs; 3925 struct statfs sfs;
3702 3926
… …
3706 3930
3707 if (!fs_2625) 3931 if (!fs_2625)
3708 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3932 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3709 else if (!statfs (w->path, &sfs) 3933 else if (!statfs (w->path, &sfs)
3710 && (sfs.f_type == 0x1373 /* devfs */ 3934 && (sfs.f_type == 0x1373 /* devfs */
3935 || sfs.f_type == 0x4006 /* fat */
3936 || sfs.f_type == 0x4d44 /* msdos */
3711 || sfs.f_type == 0xEF53 /* ext2/3 */ 3937 || sfs.f_type == 0xEF53 /* ext2/3 */
3938 || sfs.f_type == 0x72b6 /* jffs2 */
3939 || sfs.f_type == 0x858458f6 /* ramfs */
3940 || sfs.f_type == 0x5346544e /* ntfs */
3712 || sfs.f_type == 0x3153464a /* jfs */ 3941 || sfs.f_type == 0x3153464a /* jfs */
3942 || sfs.f_type == 0x9123683e /* btrfs */
3713 || sfs.f_type == 0x52654973 /* reiser3 */ 3943 || sfs.f_type == 0x52654973 /* reiser3 */
3714 || sfs.f_type == 0x01021994 /* tempfs */ 3944 || sfs.f_type == 0x01021994 /* tmpfs */
3715 || sfs.f_type == 0x58465342 /* xfs */)) 3945 || sfs.f_type == 0x58465342 /* xfs */))
3716 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3946 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3717 else 3947 else
3718 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3948 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3719 } 3949 }

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