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 |
… | |
… | |
153 | |
153 | |
154 | #endif |
154 | #endif |
155 | |
155 | |
156 | #include <math.h> |
156 | #include <math.h> |
157 | #include <stdlib.h> |
157 | #include <stdlib.h> |
|
|
158 | #include <string.h> |
158 | #include <fcntl.h> |
159 | #include <fcntl.h> |
159 | #include <stddef.h> |
160 | #include <stddef.h> |
160 | |
161 | |
161 | #include <stdio.h> |
162 | #include <stdio.h> |
162 | |
163 | |
163 | #include <assert.h> |
164 | #include <assert.h> |
164 | #include <errno.h> |
165 | #include <errno.h> |
165 | #include <sys/types.h> |
166 | #include <sys/types.h> |
166 | #include <time.h> |
167 | #include <time.h> |
|
|
168 | #include <limits.h> |
167 | |
169 | |
168 | #include <signal.h> |
170 | #include <signal.h> |
169 | |
171 | |
170 | #ifdef EV_H |
172 | #ifdef EV_H |
171 | # include EV_H |
173 | # include EV_H |
… | |
… | |
302 | # define EV_USE_EVENTFD 0 |
304 | # define EV_USE_EVENTFD 0 |
303 | # endif |
305 | # endif |
304 | #endif |
306 | #endif |
305 | |
307 | |
306 | #ifndef EV_USE_SIGNALFD |
308 | #ifndef EV_USE_SIGNALFD |
307 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9)) |
309 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
308 | # define EV_USE_SIGNALFD 1 |
310 | # define EV_USE_SIGNALFD 1 |
309 | # else |
311 | # else |
310 | # define EV_USE_SIGNALFD 0 |
312 | # define EV_USE_SIGNALFD 0 |
311 | # endif |
313 | # endif |
312 | #endif |
314 | #endif |
… | |
… | |
343 | # endif |
345 | # endif |
344 | #endif |
346 | #endif |
345 | |
347 | |
346 | /* 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 */ |
347 | |
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 | |
348 | #ifndef CLOCK_MONOTONIC |
356 | #ifndef CLOCK_MONOTONIC |
349 | # undef EV_USE_MONOTONIC |
357 | # undef EV_USE_MONOTONIC |
350 | # define EV_USE_MONOTONIC 0 |
358 | # define EV_USE_MONOTONIC 0 |
351 | #endif |
359 | #endif |
352 | |
360 | |
… | |
… | |
402 | } |
410 | } |
403 | # endif |
411 | # endif |
404 | #endif |
412 | #endif |
405 | |
413 | |
406 | #if EV_USE_SIGNALFD |
414 | #if EV_USE_SIGNALFD |
407 | # include <sys/signalfd.h> |
415 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
|
|
416 | # include <stdint.h> |
|
|
417 | # ifndef SFD_NONBLOCK |
|
|
418 | # define SFD_NONBLOCK O_NONBLOCK |
408 | #endif |
419 | # endif |
|
|
420 | # ifndef SFD_CLOEXEC |
|
|
421 | # ifdef O_CLOEXEC |
|
|
422 | # define SFD_CLOEXEC O_CLOEXEC |
|
|
423 | # else |
|
|
424 | # define SFD_CLOEXEC 02000000 |
|
|
425 | # endif |
|
|
426 | # endif |
|
|
427 | # ifdef __cplusplus |
|
|
428 | extern "C" { |
|
|
429 | # endif |
|
|
430 | int signalfd (int fd, const sigset_t *mask, int flags); |
|
|
431 | |
|
|
432 | struct signalfd_siginfo |
|
|
433 | { |
|
|
434 | uint32_t ssi_signo; |
|
|
435 | char pad[128 - sizeof (uint32_t)]; |
|
|
436 | }; |
|
|
437 | # ifdef __cplusplus |
|
|
438 | } |
|
|
439 | # endif |
|
|
440 | #endif |
|
|
441 | |
409 | |
442 | |
410 | /**/ |
443 | /**/ |
411 | |
444 | |
412 | #if EV_VERIFY >= 3 |
445 | #if EV_VERIFY >= 3 |
413 | # define EV_FREQUENT_CHECK ev_loop_verify (EV_A) |
446 | # define EV_FREQUENT_CHECK ev_loop_verify (EV_A) |
… | |
… | |
425 | */ |
458 | */ |
426 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
459 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
427 | |
460 | |
428 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
461 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
429 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
462 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
430 | /*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ |
|
|
431 | |
463 | |
432 | #if __GNUC__ >= 4 |
464 | #if __GNUC__ >= 4 |
433 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
465 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
434 | # define noinline __attribute__ ((noinline)) |
466 | # define noinline __attribute__ ((noinline)) |
435 | #else |
467 | #else |
… | |
… | |
474 | static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
506 | static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
475 | #endif |
507 | #endif |
476 | |
508 | |
477 | #if EV_USE_MONOTONIC |
509 | #if EV_USE_MONOTONIC |
478 | static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
510 | static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
|
|
511 | #endif |
|
|
512 | |
|
|
513 | #ifndef EV_FD_TO_WIN32_HANDLE |
|
|
514 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
|
|
515 | #endif |
|
|
516 | #ifndef EV_WIN32_HANDLE_TO_FD |
|
|
517 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
|
|
518 | #endif |
|
|
519 | #ifndef EV_WIN32_CLOSE_FD |
|
|
520 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
479 | #endif |
521 | #endif |
480 | |
522 | |
481 | #ifdef _WIN32 |
523 | #ifdef _WIN32 |
482 | # include "ev_win32.c" |
524 | # include "ev_win32.c" |
483 | #endif |
525 | #endif |
… | |
… | |
876 | |
918 | |
877 | #if EV_SELECT_IS_WINSOCKET |
919 | #if EV_SELECT_IS_WINSOCKET |
878 | if (events) |
920 | if (events) |
879 | { |
921 | { |
880 | unsigned long arg; |
922 | unsigned long arg; |
881 | #ifdef EV_FD_TO_WIN32_HANDLE |
|
|
882 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
923 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
883 | #else |
|
|
884 | anfd->handle = _get_osfhandle (fd); |
|
|
885 | #endif |
|
|
886 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
924 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
887 | } |
925 | } |
888 | #endif |
926 | #endif |
889 | |
927 | |
890 | { |
928 | { |
… | |
… | |
933 | /* check whether the given fd is atcually valid, for error recovery */ |
971 | /* check whether the given fd is atcually valid, for error recovery */ |
934 | inline_size int |
972 | inline_size int |
935 | fd_valid (int fd) |
973 | fd_valid (int fd) |
936 | { |
974 | { |
937 | #ifdef _WIN32 |
975 | #ifdef _WIN32 |
938 | return _get_osfhandle (fd) != -1; |
976 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
939 | #else |
977 | #else |
940 | return fcntl (fd, F_GETFD) != -1; |
978 | return fcntl (fd, F_GETFD) != -1; |
941 | #endif |
979 | #endif |
942 | } |
980 | } |
943 | |
981 | |
… | |
… | |
1148 | inline_speed void |
1186 | inline_speed void |
1149 | fd_intern (int fd) |
1187 | fd_intern (int fd) |
1150 | { |
1188 | { |
1151 | #ifdef _WIN32 |
1189 | #ifdef _WIN32 |
1152 | unsigned long arg = 1; |
1190 | unsigned long arg = 1; |
1153 | ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1191 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
1154 | #else |
1192 | #else |
1155 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1193 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1156 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1194 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1157 | #endif |
1195 | #endif |
1158 | } |
1196 | } |
… | |
… | |
1263 | { |
1301 | { |
1264 | #if EV_MULTIPLICITY |
1302 | #if EV_MULTIPLICITY |
1265 | EV_P = signals [signum - 1].loop; |
1303 | EV_P = signals [signum - 1].loop; |
1266 | #endif |
1304 | #endif |
1267 | |
1305 | |
1268 | #if _WIN32 |
1306 | #ifdef _WIN32 |
1269 | signal (signum, ev_sighandler); |
1307 | signal (signum, ev_sighandler); |
1270 | #endif |
1308 | #endif |
1271 | |
1309 | |
1272 | signals [signum - 1].pending = 1; |
1310 | signals [signum - 1].pending = 1; |
1273 | evpipe_write (EV_A_ &sig_pending); |
1311 | evpipe_write (EV_A_ &sig_pending); |
… | |
… | |
1574 | #endif |
1612 | #endif |
1575 | #if EV_USE_INOTIFY |
1613 | #if EV_USE_INOTIFY |
1576 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1614 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1577 | #endif |
1615 | #endif |
1578 | #if EV_USE_SIGNALFD |
1616 | #if EV_USE_SIGNALFD |
1579 | sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2; |
1617 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1580 | #endif |
1618 | #endif |
1581 | |
1619 | |
1582 | if (!(flags & 0x0000ffffU)) |
1620 | if (!(flags & 0x0000ffffU)) |
1583 | flags |= ev_recommended_backends (); |
1621 | flags |= ev_recommended_backends (); |
1584 | |
1622 | |
… | |
… | |
1621 | close (evfd); |
1659 | close (evfd); |
1622 | #endif |
1660 | #endif |
1623 | |
1661 | |
1624 | if (evpipe [0] >= 0) |
1662 | if (evpipe [0] >= 0) |
1625 | { |
1663 | { |
1626 | close (evpipe [0]); |
1664 | EV_WIN32_CLOSE_FD (evpipe [0]); |
1627 | close (evpipe [1]); |
1665 | EV_WIN32_CLOSE_FD (evpipe [1]); |
1628 | } |
1666 | } |
1629 | } |
1667 | } |
1630 | |
1668 | |
1631 | #if EV_USE_SIGNALFD |
1669 | #if EV_USE_SIGNALFD |
1632 | if (ev_is_active (&sigfd_w)) |
1670 | if (ev_is_active (&sigfd_w)) |
1633 | { |
|
|
1634 | /*ev_ref (EV_A);*/ |
|
|
1635 | /*ev_io_stop (EV_A_ &sigfd_w);*/ |
|
|
1636 | |
|
|
1637 | close (sigfd); |
1671 | close (sigfd); |
1638 | } |
|
|
1639 | #endif |
1672 | #endif |
1640 | |
1673 | |
1641 | #if EV_USE_INOTIFY |
1674 | #if EV_USE_INOTIFY |
1642 | if (fs_fd >= 0) |
1675 | if (fs_fd >= 0) |
1643 | close (fs_fd); |
1676 | close (fs_fd); |
… | |
… | |
1728 | close (evfd); |
1761 | close (evfd); |
1729 | #endif |
1762 | #endif |
1730 | |
1763 | |
1731 | if (evpipe [0] >= 0) |
1764 | if (evpipe [0] >= 0) |
1732 | { |
1765 | { |
1733 | close (evpipe [0]); |
1766 | EV_WIN32_CLOSE_FD (evpipe [0]); |
1734 | close (evpipe [1]); |
1767 | EV_WIN32_CLOSE_FD (evpipe [1]); |
1735 | } |
1768 | } |
1736 | |
1769 | |
1737 | evpipe_init (EV_A); |
1770 | evpipe_init (EV_A); |
1738 | /* now iterate over everything, in case we missed something */ |
1771 | /* now iterate over everything, in case we missed something */ |
1739 | pipecb (EV_A_ &pipe_w, EV_READ); |
1772 | pipecb (EV_A_ &pipe_w, EV_READ); |
… | |
… | |
2131 | ANHE_at_cache (*he); |
2164 | ANHE_at_cache (*he); |
2132 | } |
2165 | } |
2133 | } |
2166 | } |
2134 | |
2167 | |
2135 | /* fetch new monotonic and realtime times from the kernel */ |
2168 | /* fetch new monotonic and realtime times from the kernel */ |
2136 | /* also detetc if there was a timejump, and act accordingly */ |
2169 | /* also detect if there was a timejump, and act accordingly */ |
2137 | inline_speed void |
2170 | inline_speed void |
2138 | time_update (EV_P_ ev_tstamp max_block) |
2171 | time_update (EV_P_ ev_tstamp max_block) |
2139 | { |
2172 | { |
2140 | #if EV_USE_MONOTONIC |
2173 | #if EV_USE_MONOTONIC |
2141 | if (expect_true (have_monotonic)) |
2174 | if (expect_true (have_monotonic)) |
… | |
… | |
2475 | |
2508 | |
2476 | if (expect_false (ev_is_active (w))) |
2509 | if (expect_false (ev_is_active (w))) |
2477 | return; |
2510 | return; |
2478 | |
2511 | |
2479 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2512 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2480 | 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)))); |
2481 | |
2514 | |
2482 | EV_FREQUENT_CHECK; |
2515 | EV_FREQUENT_CHECK; |
2483 | |
2516 | |
2484 | ev_start (EV_A_ (W)w, 1); |
2517 | ev_start (EV_A_ (W)w, 1); |
2485 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2518 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
… | |
… | |
2555 | timers [active] = timers [timercnt + HEAP0]; |
2588 | timers [active] = timers [timercnt + HEAP0]; |
2556 | adjustheap (timers, timercnt, active); |
2589 | adjustheap (timers, timercnt, active); |
2557 | } |
2590 | } |
2558 | } |
2591 | } |
2559 | |
2592 | |
2560 | EV_FREQUENT_CHECK; |
|
|
2561 | |
|
|
2562 | ev_at (w) -= mn_now; |
2593 | ev_at (w) -= mn_now; |
2563 | |
2594 | |
2564 | ev_stop (EV_A_ (W)w); |
2595 | ev_stop (EV_A_ (W)w); |
|
|
2596 | |
|
|
2597 | EV_FREQUENT_CHECK; |
2565 | } |
2598 | } |
2566 | |
2599 | |
2567 | void noinline |
2600 | void noinline |
2568 | ev_timer_again (EV_P_ ev_timer *w) |
2601 | ev_timer_again (EV_P_ ev_timer *w) |
2569 | { |
2602 | { |
… | |
… | |
2648 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2681 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2649 | adjustheap (periodics, periodiccnt, active); |
2682 | adjustheap (periodics, periodiccnt, active); |
2650 | } |
2683 | } |
2651 | } |
2684 | } |
2652 | |
2685 | |
2653 | EV_FREQUENT_CHECK; |
|
|
2654 | |
|
|
2655 | ev_stop (EV_A_ (W)w); |
2686 | ev_stop (EV_A_ (W)w); |
|
|
2687 | |
|
|
2688 | EV_FREQUENT_CHECK; |
2656 | } |
2689 | } |
2657 | |
2690 | |
2658 | void noinline |
2691 | void noinline |
2659 | ev_periodic_again (EV_P_ ev_periodic *w) |
2692 | ev_periodic_again (EV_P_ ev_periodic *w) |
2660 | { |
2693 | { |
… | |
… | |
2721 | if (!((WL)w)->next) |
2754 | if (!((WL)w)->next) |
2722 | # if EV_USE_SIGNALFD |
2755 | # if EV_USE_SIGNALFD |
2723 | if (sigfd < 0) /*TODO*/ |
2756 | if (sigfd < 0) /*TODO*/ |
2724 | # endif |
2757 | # endif |
2725 | { |
2758 | { |
2726 | # if _WIN32 |
2759 | # ifdef _WIN32 |
|
|
2760 | evpipe_init (EV_A); |
|
|
2761 | |
2727 | signal (w->signum, ev_sighandler); |
2762 | signal (w->signum, ev_sighandler); |
2728 | # else |
2763 | # else |
2729 | struct sigaction sa; |
2764 | struct sigaction sa; |
2730 | |
2765 | |
2731 | evpipe_init (EV_A); |
2766 | evpipe_init (EV_A); |
… | |
… | |
2762 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2797 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2763 | #endif |
2798 | #endif |
2764 | #if EV_USE_SIGNALFD |
2799 | #if EV_USE_SIGNALFD |
2765 | if (sigfd >= 0) |
2800 | if (sigfd >= 0) |
2766 | { |
2801 | { |
2767 | sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D |
2802 | sigset_t ss; |
|
|
2803 | |
|
|
2804 | sigemptyset (&ss); |
|
|
2805 | sigaddset (&ss, w->signum); |
2768 | sigdelset (&sigfd_set, w->signum); |
2806 | sigdelset (&sigfd_set, w->signum); |
|
|
2807 | |
2769 | signalfd (sigfd, &sigfd_set, 0); |
2808 | signalfd (sigfd, &sigfd_set, 0); |
2770 | sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D |
2809 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
2771 | /*TODO: maybe unblock signal? */ |
|
|
2772 | } |
2810 | } |
2773 | else |
2811 | else |
2774 | #endif |
2812 | #endif |
2775 | signal (w->signum, SIG_DFL); |
2813 | signal (w->signum, SIG_DFL); |
2776 | } |
2814 | } |
… | |
… | |
2822 | #define MIN_STAT_INTERVAL 0.1074891 |
2860 | #define MIN_STAT_INTERVAL 0.1074891 |
2823 | |
2861 | |
2824 | 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); |
2825 | |
2863 | |
2826 | #if EV_USE_INOTIFY |
2864 | #if EV_USE_INOTIFY |
2827 | # 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) |
2828 | |
2868 | |
2829 | static void noinline |
2869 | static void noinline |
2830 | infy_add (EV_P_ ev_stat *w) |
2870 | infy_add (EV_P_ ev_stat *w) |
2831 | { |
2871 | { |
2832 | 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); |
2833 | |
2873 | |
2834 | if (w->wd < 0) |
2874 | if (w->wd >= 0) |
|
|
2875 | { |
|
|
2876 | struct statfs sfs; |
|
|
2877 | |
|
|
2878 | /* now local changes will be tracked by inotify, but remote changes won't */ |
|
|
2879 | /* unless the filesystem is known to be local, we therefore still poll */ |
|
|
2880 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2881 | |
|
|
2882 | if (!fs_2625) |
|
|
2883 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
2884 | else if (!statfs (w->path, &sfs) |
|
|
2885 | && (sfs.f_type == 0x1373 /* devfs */ |
|
|
2886 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2887 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2888 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2889 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2890 | || sfs.f_type == 0x58465342 /* xfs */)) |
|
|
2891 | w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
|
|
2892 | else |
|
|
2893 | w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
2835 | { |
2894 | } |
|
|
2895 | else |
|
|
2896 | { |
|
|
2897 | /* can't use inotify, continue to stat */ |
2836 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2898 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2837 | ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
|
|
2838 | |
2899 | |
2839 | /* monitor some parent directory for speedup hints */ |
2900 | /* if path is not there, monitor some parent directory for speedup hints */ |
2840 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2901 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2841 | /* but an efficiency issue only */ |
2902 | /* but an efficiency issue only */ |
2842 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2903 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2843 | { |
2904 | { |
2844 | char path [4096]; |
2905 | char path [4096]; |
… | |
… | |
2860 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2921 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2861 | } |
2922 | } |
2862 | } |
2923 | } |
2863 | |
2924 | |
2864 | if (w->wd >= 0) |
2925 | if (w->wd >= 0) |
2865 | { |
|
|
2866 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2926 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2867 | |
2927 | |
2868 | /* now local changes will be tracked by inotify, but remote changes won't */ |
2928 | /* now re-arm timer, if required */ |
2869 | /* unless the filesystem it known to be local, we therefore still poll */ |
2929 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
2870 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2871 | struct statfs sfs; |
|
|
2872 | |
|
|
2873 | if (fs_2625 && !statfs (w->path, &sfs)) |
|
|
2874 | if (sfs.f_type == 0x1373 /* devfs */ |
|
|
2875 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2876 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2877 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2878 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2879 | || sfs.f_type == 0x58465342 /* xfs */) |
|
|
2880 | return; |
|
|
2881 | |
|
|
2882 | w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL; |
|
|
2883 | ev_timer_again (EV_A_ &w->timer); |
2930 | ev_timer_again (EV_A_ &w->timer); |
2884 | } |
2931 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
2885 | } |
2932 | } |
2886 | |
2933 | |
2887 | static void noinline |
2934 | static void noinline |
2888 | infy_del (EV_P_ ev_stat *w) |
2935 | infy_del (EV_P_ ev_stat *w) |
2889 | { |
2936 | { |
… | |
… | |
2934 | |
2981 | |
2935 | static void |
2982 | static void |
2936 | infy_cb (EV_P_ ev_io *w, int revents) |
2983 | infy_cb (EV_P_ ev_io *w, int revents) |
2937 | { |
2984 | { |
2938 | char buf [EV_INOTIFY_BUFSIZE]; |
2985 | char buf [EV_INOTIFY_BUFSIZE]; |
2939 | struct inotify_event *ev = (struct inotify_event *)buf; |
|
|
2940 | int ofs; |
2986 | int ofs; |
2941 | int len = read (fs_fd, buf, sizeof (buf)); |
2987 | int len = read (fs_fd, buf, sizeof (buf)); |
2942 | |
2988 | |
2943 | 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); |
2944 | 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 | } |
2945 | } |
2995 | } |
2946 | |
2996 | |
2947 | inline_size void |
2997 | inline_size void |
2948 | check_2625 (EV_P) |
2998 | check_2625 (EV_P) |
2949 | { |
2999 | { |
… | |
… | |
2965 | return; |
3015 | return; |
2966 | |
3016 | |
2967 | fs_2625 = 1; |
3017 | fs_2625 = 1; |
2968 | } |
3018 | } |
2969 | |
3019 | |
|
|
3020 | inline_size int |
|
|
3021 | infy_newfd (void) |
|
|
3022 | { |
|
|
3023 | #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
|
|
3024 | int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
|
|
3025 | if (fd >= 0) |
|
|
3026 | return fd; |
|
|
3027 | #endif |
|
|
3028 | return inotify_init (); |
|
|
3029 | } |
|
|
3030 | |
2970 | inline_size void |
3031 | inline_size void |
2971 | infy_init (EV_P) |
3032 | infy_init (EV_P) |
2972 | { |
3033 | { |
2973 | if (fs_fd != -2) |
3034 | if (fs_fd != -2) |
2974 | return; |
3035 | return; |
2975 | |
3036 | |
2976 | fs_fd = -1; |
3037 | fs_fd = -1; |
2977 | |
3038 | |
2978 | check_2625 (EV_A); |
3039 | check_2625 (EV_A); |
2979 | |
3040 | |
2980 | fs_fd = inotify_init (); |
3041 | fs_fd = infy_newfd (); |
2981 | |
3042 | |
2982 | if (fs_fd >= 0) |
3043 | if (fs_fd >= 0) |
2983 | { |
3044 | { |
|
|
3045 | fd_intern (fs_fd); |
2984 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
3046 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2985 | ev_set_priority (&fs_w, EV_MAXPRI); |
3047 | ev_set_priority (&fs_w, EV_MAXPRI); |
2986 | ev_io_start (EV_A_ &fs_w); |
3048 | ev_io_start (EV_A_ &fs_w); |
|
|
3049 | ev_unref (EV_A); |
2987 | } |
3050 | } |
2988 | } |
3051 | } |
2989 | |
3052 | |
2990 | inline_size void |
3053 | inline_size void |
2991 | infy_fork (EV_P) |
3054 | infy_fork (EV_P) |
… | |
… | |
2993 | int slot; |
3056 | int slot; |
2994 | |
3057 | |
2995 | if (fs_fd < 0) |
3058 | if (fs_fd < 0) |
2996 | return; |
3059 | return; |
2997 | |
3060 | |
|
|
3061 | ev_ref (EV_A); |
|
|
3062 | ev_io_stop (EV_A_ &fs_w); |
2998 | close (fs_fd); |
3063 | close (fs_fd); |
2999 | fs_fd = inotify_init (); |
3064 | fs_fd = infy_newfd (); |
|
|
3065 | |
|
|
3066 | if (fs_fd >= 0) |
|
|
3067 | { |
|
|
3068 | fd_intern (fs_fd); |
|
|
3069 | ev_io_set (&fs_w, fs_fd, EV_READ); |
|
|
3070 | ev_io_start (EV_A_ &fs_w); |
|
|
3071 | ev_unref (EV_A); |
|
|
3072 | } |
3000 | |
3073 | |
3001 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3074 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3002 | { |
3075 | { |
3003 | WL w_ = fs_hash [slot].head; |
3076 | WL w_ = fs_hash [slot].head; |
3004 | fs_hash [slot].head = 0; |
3077 | fs_hash [slot].head = 0; |
… | |
… | |
3011 | w->wd = -1; |
3084 | w->wd = -1; |
3012 | |
3085 | |
3013 | if (fs_fd >= 0) |
3086 | if (fs_fd >= 0) |
3014 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3087 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3015 | else |
3088 | else |
|
|
3089 | { |
|
|
3090 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3091 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
3016 | ev_timer_again (EV_A_ &w->timer); |
3092 | ev_timer_again (EV_A_ &w->timer); |
|
|
3093 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3094 | } |
3017 | } |
3095 | } |
3018 | } |
3096 | } |
3019 | } |
3097 | } |
3020 | |
3098 | |
3021 | #endif |
3099 | #endif |
… | |
… | |
3038 | static void noinline |
3116 | static void noinline |
3039 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3117 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3040 | { |
3118 | { |
3041 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3119 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3042 | |
3120 | |
3043 | /* we copy this here each the time so that */ |
3121 | ev_statdata prev = w->attr; |
3044 | /* prev has the old value when the callback gets invoked */ |
|
|
3045 | w->prev = w->attr; |
|
|
3046 | ev_stat_stat (EV_A_ w); |
3122 | ev_stat_stat (EV_A_ w); |
3047 | |
3123 | |
3048 | /* 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 */ |
3049 | if ( |
3125 | if ( |
3050 | w->prev.st_dev != w->attr.st_dev |
3126 | prev.st_dev != w->attr.st_dev |
3051 | || w->prev.st_ino != w->attr.st_ino |
3127 | || prev.st_ino != w->attr.st_ino |
3052 | || w->prev.st_mode != w->attr.st_mode |
3128 | || prev.st_mode != w->attr.st_mode |
3053 | || w->prev.st_nlink != w->attr.st_nlink |
3129 | || prev.st_nlink != w->attr.st_nlink |
3054 | || w->prev.st_uid != w->attr.st_uid |
3130 | || prev.st_uid != w->attr.st_uid |
3055 | || w->prev.st_gid != w->attr.st_gid |
3131 | || prev.st_gid != w->attr.st_gid |
3056 | || w->prev.st_rdev != w->attr.st_rdev |
3132 | || prev.st_rdev != w->attr.st_rdev |
3057 | || w->prev.st_size != w->attr.st_size |
3133 | || prev.st_size != w->attr.st_size |
3058 | || w->prev.st_atime != w->attr.st_atime |
3134 | || prev.st_atime != w->attr.st_atime |
3059 | || w->prev.st_mtime != w->attr.st_mtime |
3135 | || prev.st_mtime != w->attr.st_mtime |
3060 | || w->prev.st_ctime != w->attr.st_ctime |
3136 | || prev.st_ctime != w->attr.st_ctime |
3061 | ) { |
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 | |
3062 | #if EV_USE_INOTIFY |
3143 | #if EV_USE_INOTIFY |
3063 | if (fs_fd >= 0) |
3144 | if (fs_fd >= 0) |
3064 | { |
3145 | { |
3065 | infy_del (EV_A_ w); |
3146 | infy_del (EV_A_ w); |
3066 | infy_add (EV_A_ w); |
3147 | infy_add (EV_A_ w); |
… | |
… | |
3091 | |
3172 | |
3092 | if (fs_fd >= 0) |
3173 | if (fs_fd >= 0) |
3093 | infy_add (EV_A_ w); |
3174 | infy_add (EV_A_ w); |
3094 | else |
3175 | else |
3095 | #endif |
3176 | #endif |
|
|
3177 | { |
3096 | ev_timer_again (EV_A_ &w->timer); |
3178 | ev_timer_again (EV_A_ &w->timer); |
|
|
3179 | ev_unref (EV_A); |
|
|
3180 | } |
3097 | |
3181 | |
3098 | ev_start (EV_A_ (W)w, 1); |
3182 | ev_start (EV_A_ (W)w, 1); |
3099 | |
3183 | |
3100 | EV_FREQUENT_CHECK; |
3184 | EV_FREQUENT_CHECK; |
3101 | } |
3185 | } |
… | |
… | |
3110 | EV_FREQUENT_CHECK; |
3194 | EV_FREQUENT_CHECK; |
3111 | |
3195 | |
3112 | #if EV_USE_INOTIFY |
3196 | #if EV_USE_INOTIFY |
3113 | infy_del (EV_A_ w); |
3197 | infy_del (EV_A_ w); |
3114 | #endif |
3198 | #endif |
|
|
3199 | |
|
|
3200 | if (ev_is_active (&w->timer)) |
|
|
3201 | { |
|
|
3202 | ev_ref (EV_A); |
3115 | ev_timer_stop (EV_A_ &w->timer); |
3203 | ev_timer_stop (EV_A_ &w->timer); |
|
|
3204 | } |
3116 | |
3205 | |
3117 | ev_stop (EV_A_ (W)w); |
3206 | ev_stop (EV_A_ (W)w); |
3118 | |
3207 | |
3119 | EV_FREQUENT_CHECK; |
3208 | EV_FREQUENT_CHECK; |
3120 | } |
3209 | } |
… | |
… | |
3339 | EV_FREQUENT_CHECK; |
3428 | EV_FREQUENT_CHECK; |
3340 | |
3429 | |
3341 | ev_io_stop (EV_A_ &w->io); |
3430 | ev_io_stop (EV_A_ &w->io); |
3342 | ev_prepare_stop (EV_A_ &w->prepare); |
3431 | ev_prepare_stop (EV_A_ &w->prepare); |
3343 | ev_fork_stop (EV_A_ &w->fork); |
3432 | ev_fork_stop (EV_A_ &w->fork); |
|
|
3433 | |
|
|
3434 | ev_stop (EV_A_ (W)w); |
3344 | |
3435 | |
3345 | EV_FREQUENT_CHECK; |
3436 | EV_FREQUENT_CHECK; |
3346 | } |
3437 | } |
3347 | #endif |
3438 | #endif |
3348 | |
3439 | |