1 | /* |
1 | /* |
2 | * libev event processing core, watcher management |
2 | * libev event processing core, watcher management |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
110 | # define EV_USE_EPOLL 0 |
110 | # define EV_USE_EPOLL 0 |
111 | # endif |
111 | # endif |
112 | # endif |
112 | # endif |
113 | |
113 | |
114 | # ifndef EV_USE_KQUEUE |
114 | # ifndef EV_USE_KQUEUE |
115 | # if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H |
115 | # if HAVE_KQUEUE && HAVE_SYS_EVENT_H |
116 | # define EV_USE_KQUEUE 1 |
116 | # define EV_USE_KQUEUE 1 |
117 | # else |
117 | # else |
118 | # define EV_USE_KQUEUE 0 |
118 | # define EV_USE_KQUEUE 0 |
119 | # endif |
119 | # endif |
120 | # endif |
120 | # endif |
… | |
… | |
163 | |
163 | |
164 | #include <assert.h> |
164 | #include <assert.h> |
165 | #include <errno.h> |
165 | #include <errno.h> |
166 | #include <sys/types.h> |
166 | #include <sys/types.h> |
167 | #include <time.h> |
167 | #include <time.h> |
|
|
168 | #include <limits.h> |
168 | |
169 | |
169 | #include <signal.h> |
170 | #include <signal.h> |
170 | |
171 | |
171 | #ifdef EV_H |
172 | #ifdef EV_H |
172 | # include EV_H |
173 | # include EV_H |
… | |
… | |
344 | # endif |
345 | # endif |
345 | #endif |
346 | #endif |
346 | |
347 | |
347 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
348 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
348 | |
349 | |
|
|
350 | #ifdef _AIX |
|
|
351 | /* AIX has a completely broken poll.h header */ |
|
|
352 | # undef EV_USE_POLL |
|
|
353 | # define EV_USE_POLL 0 |
|
|
354 | #endif |
|
|
355 | |
349 | #ifndef CLOCK_MONOTONIC |
356 | #ifndef CLOCK_MONOTONIC |
350 | # undef EV_USE_MONOTONIC |
357 | # undef EV_USE_MONOTONIC |
351 | # define EV_USE_MONOTONIC 0 |
358 | # define EV_USE_MONOTONIC 0 |
352 | #endif |
359 | #endif |
353 | |
360 | |
… | |
… | |
505 | |
512 | |
506 | #ifndef EV_FD_TO_WIN32_HANDLE |
513 | #ifndef EV_FD_TO_WIN32_HANDLE |
507 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
514 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
508 | #endif |
515 | #endif |
509 | #ifndef EV_WIN32_HANDLE_TO_FD |
516 | #ifndef EV_WIN32_HANDLE_TO_FD |
510 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (fd, 0) |
517 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
511 | #endif |
518 | #endif |
512 | #ifndef EV_WIN32_CLOSE_FD |
519 | #ifndef EV_WIN32_CLOSE_FD |
513 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
520 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
514 | #endif |
521 | #endif |
515 | |
522 | |
… | |
… | |
964 | /* check whether the given fd is atcually valid, for error recovery */ |
971 | /* check whether the given fd is atcually valid, for error recovery */ |
965 | inline_size int |
972 | inline_size int |
966 | fd_valid (int fd) |
973 | fd_valid (int fd) |
967 | { |
974 | { |
968 | #ifdef _WIN32 |
975 | #ifdef _WIN32 |
969 | return _get_osfhandle (fd) != -1; |
976 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
970 | #else |
977 | #else |
971 | return fcntl (fd, F_GETFD) != -1; |
978 | return fcntl (fd, F_GETFD) != -1; |
972 | #endif |
979 | #endif |
973 | } |
980 | } |
974 | |
981 | |
… | |
… | |
1179 | inline_speed void |
1186 | inline_speed void |
1180 | fd_intern (int fd) |
1187 | fd_intern (int fd) |
1181 | { |
1188 | { |
1182 | #ifdef _WIN32 |
1189 | #ifdef _WIN32 |
1183 | unsigned long arg = 1; |
1190 | unsigned long arg = 1; |
1184 | ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1191 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
1185 | #else |
1192 | #else |
1186 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1193 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1187 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1194 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1188 | #endif |
1195 | #endif |
1189 | } |
1196 | } |
… | |
… | |
1294 | { |
1301 | { |
1295 | #if EV_MULTIPLICITY |
1302 | #if EV_MULTIPLICITY |
1296 | EV_P = signals [signum - 1].loop; |
1303 | EV_P = signals [signum - 1].loop; |
1297 | #endif |
1304 | #endif |
1298 | |
1305 | |
1299 | #if _WIN32 |
1306 | #ifdef _WIN32 |
1300 | signal (signum, ev_sighandler); |
1307 | signal (signum, ev_sighandler); |
1301 | #endif |
1308 | #endif |
1302 | |
1309 | |
1303 | signals [signum - 1].pending = 1; |
1310 | signals [signum - 1].pending = 1; |
1304 | evpipe_write (EV_A_ &sig_pending); |
1311 | evpipe_write (EV_A_ &sig_pending); |
… | |
… | |
1605 | #endif |
1612 | #endif |
1606 | #if EV_USE_INOTIFY |
1613 | #if EV_USE_INOTIFY |
1607 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1614 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1608 | #endif |
1615 | #endif |
1609 | #if EV_USE_SIGNALFD |
1616 | #if EV_USE_SIGNALFD |
1610 | sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2; |
1617 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1611 | #endif |
1618 | #endif |
1612 | |
1619 | |
1613 | if (!(flags & 0x0000ffffU)) |
1620 | if (!(flags & 0x0000ffffU)) |
1614 | flags |= ev_recommended_backends (); |
1621 | flags |= ev_recommended_backends (); |
1615 | |
1622 | |
… | |
… | |
2157 | ANHE_at_cache (*he); |
2164 | ANHE_at_cache (*he); |
2158 | } |
2165 | } |
2159 | } |
2166 | } |
2160 | |
2167 | |
2161 | /* fetch new monotonic and realtime times from the kernel */ |
2168 | /* fetch new monotonic and realtime times from the kernel */ |
2162 | /* also detetc if there was a timejump, and act accordingly */ |
2169 | /* also detect if there was a timejump, and act accordingly */ |
2163 | inline_speed void |
2170 | inline_speed void |
2164 | time_update (EV_P_ ev_tstamp max_block) |
2171 | time_update (EV_P_ ev_tstamp max_block) |
2165 | { |
2172 | { |
2166 | #if EV_USE_MONOTONIC |
2173 | #if EV_USE_MONOTONIC |
2167 | if (expect_true (have_monotonic)) |
2174 | if (expect_true (have_monotonic)) |
… | |
… | |
2501 | |
2508 | |
2502 | if (expect_false (ev_is_active (w))) |
2509 | if (expect_false (ev_is_active (w))) |
2503 | return; |
2510 | return; |
2504 | |
2511 | |
2505 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2512 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2506 | assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2513 | assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2507 | |
2514 | |
2508 | EV_FREQUENT_CHECK; |
2515 | EV_FREQUENT_CHECK; |
2509 | |
2516 | |
2510 | ev_start (EV_A_ (W)w, 1); |
2517 | ev_start (EV_A_ (W)w, 1); |
2511 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2518 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
… | |
… | |
2747 | if (!((WL)w)->next) |
2754 | if (!((WL)w)->next) |
2748 | # if EV_USE_SIGNALFD |
2755 | # if EV_USE_SIGNALFD |
2749 | if (sigfd < 0) /*TODO*/ |
2756 | if (sigfd < 0) /*TODO*/ |
2750 | # endif |
2757 | # endif |
2751 | { |
2758 | { |
2752 | # if _WIN32 |
2759 | # ifdef _WIN32 |
2753 | evpipe_init (EV_A); |
2760 | evpipe_init (EV_A); |
2754 | |
2761 | |
2755 | signal (w->signum, ev_sighandler); |
2762 | signal (w->signum, ev_sighandler); |
2756 | # else |
2763 | # else |
2757 | struct sigaction sa; |
2764 | struct sigaction sa; |
… | |
… | |
2790 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2797 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2791 | #endif |
2798 | #endif |
2792 | #if EV_USE_SIGNALFD |
2799 | #if EV_USE_SIGNALFD |
2793 | if (sigfd >= 0) |
2800 | if (sigfd >= 0) |
2794 | { |
2801 | { |
2795 | sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D |
2802 | sigset_t ss; |
|
|
2803 | |
|
|
2804 | sigemptyset (&ss); |
|
|
2805 | sigaddset (&ss, w->signum); |
2796 | sigdelset (&sigfd_set, w->signum); |
2806 | sigdelset (&sigfd_set, w->signum); |
|
|
2807 | |
2797 | signalfd (sigfd, &sigfd_set, 0); |
2808 | signalfd (sigfd, &sigfd_set, 0); |
2798 | sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D |
2809 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
2799 | /*TODO: maybe unblock signal? */ |
|
|
2800 | } |
2810 | } |
2801 | else |
2811 | else |
2802 | #endif |
2812 | #endif |
2803 | signal (w->signum, SIG_DFL); |
2813 | signal (w->signum, SIG_DFL); |
2804 | } |
2814 | } |
… | |
… | |
2850 | #define MIN_STAT_INTERVAL 0.1074891 |
2860 | #define MIN_STAT_INTERVAL 0.1074891 |
2851 | |
2861 | |
2852 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2862 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2853 | |
2863 | |
2854 | #if EV_USE_INOTIFY |
2864 | #if EV_USE_INOTIFY |
2855 | # define EV_INOTIFY_BUFSIZE 8192 |
2865 | |
|
|
2866 | /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
|
|
2867 | # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
2856 | |
2868 | |
2857 | static void noinline |
2869 | static void noinline |
2858 | infy_add (EV_P_ ev_stat *w) |
2870 | infy_add (EV_P_ ev_stat *w) |
2859 | { |
2871 | { |
2860 | 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); |
2872 | 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); |
… | |
… | |
2969 | |
2981 | |
2970 | static void |
2982 | static void |
2971 | infy_cb (EV_P_ ev_io *w, int revents) |
2983 | infy_cb (EV_P_ ev_io *w, int revents) |
2972 | { |
2984 | { |
2973 | char buf [EV_INOTIFY_BUFSIZE]; |
2985 | char buf [EV_INOTIFY_BUFSIZE]; |
2974 | struct inotify_event *ev = (struct inotify_event *)buf; |
|
|
2975 | int ofs; |
2986 | int ofs; |
2976 | int len = read (fs_fd, buf, sizeof (buf)); |
2987 | int len = read (fs_fd, buf, sizeof (buf)); |
2977 | |
2988 | |
2978 | for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
2989 | for (ofs = 0; ofs < len; ) |
|
|
2990 | { |
|
|
2991 | struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
2979 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
2992 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
|
|
2993 | ofs += sizeof (struct inotify_event) + ev->len; |
|
|
2994 | } |
2980 | } |
2995 | } |
2981 | |
2996 | |
2982 | inline_size void |
2997 | inline_size void |
2983 | check_2625 (EV_P) |
2998 | check_2625 (EV_P) |
2984 | { |
2999 | { |
… | |
… | |
3101 | static void noinline |
3116 | static void noinline |
3102 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3117 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3103 | { |
3118 | { |
3104 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3119 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3105 | |
3120 | |
3106 | /* we copy this here each the time so that */ |
3121 | ev_statdata prev = w->attr; |
3107 | /* prev has the old value when the callback gets invoked */ |
|
|
3108 | w->prev = w->attr; |
|
|
3109 | ev_stat_stat (EV_A_ w); |
3122 | ev_stat_stat (EV_A_ w); |
3110 | |
3123 | |
3111 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3124 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3112 | if ( |
3125 | if ( |
3113 | w->prev.st_dev != w->attr.st_dev |
3126 | prev.st_dev != w->attr.st_dev |
3114 | || w->prev.st_ino != w->attr.st_ino |
3127 | || prev.st_ino != w->attr.st_ino |
3115 | || w->prev.st_mode != w->attr.st_mode |
3128 | || prev.st_mode != w->attr.st_mode |
3116 | || w->prev.st_nlink != w->attr.st_nlink |
3129 | || prev.st_nlink != w->attr.st_nlink |
3117 | || w->prev.st_uid != w->attr.st_uid |
3130 | || prev.st_uid != w->attr.st_uid |
3118 | || w->prev.st_gid != w->attr.st_gid |
3131 | || prev.st_gid != w->attr.st_gid |
3119 | || w->prev.st_rdev != w->attr.st_rdev |
3132 | || prev.st_rdev != w->attr.st_rdev |
3120 | || w->prev.st_size != w->attr.st_size |
3133 | || prev.st_size != w->attr.st_size |
3121 | || w->prev.st_atime != w->attr.st_atime |
3134 | || prev.st_atime != w->attr.st_atime |
3122 | || w->prev.st_mtime != w->attr.st_mtime |
3135 | || prev.st_mtime != w->attr.st_mtime |
3123 | || w->prev.st_ctime != w->attr.st_ctime |
3136 | || prev.st_ctime != w->attr.st_ctime |
3124 | ) { |
3137 | ) { |
|
|
3138 | /* we only update w->prev on actual differences */ |
|
|
3139 | /* in case we test more often than invoke the callback, */ |
|
|
3140 | /* to ensure that prev is always different to attr */ |
|
|
3141 | w->prev = prev; |
|
|
3142 | |
3125 | #if EV_USE_INOTIFY |
3143 | #if EV_USE_INOTIFY |
3126 | if (fs_fd >= 0) |
3144 | if (fs_fd >= 0) |
3127 | { |
3145 | { |
3128 | infy_del (EV_A_ w); |
3146 | infy_del (EV_A_ w); |
3129 | infy_add (EV_A_ w); |
3147 | infy_add (EV_A_ w); |