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 | |
… | |
… | |
395 | # endif |
403 | # endif |
396 | # endif |
404 | # endif |
397 | # ifdef __cplusplus |
405 | # ifdef __cplusplus |
398 | extern "C" { |
406 | extern "C" { |
399 | # endif |
407 | # endif |
400 | int eventfd (unsigned int initval, int flags); |
408 | int (eventfd) (unsigned int initval, int flags); |
401 | # ifdef __cplusplus |
409 | # ifdef __cplusplus |
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 |
… | |
… | |
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? */ |
479 | #endif |
511 | #endif |
480 | |
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) |
|
|
521 | #endif |
|
|
522 | |
481 | #ifdef _WIN32 |
523 | #ifdef _WIN32 |
482 | # include "ev_win32.c" |
524 | # include "ev_win32.c" |
483 | #endif |
525 | #endif |
484 | |
526 | |
485 | /*****************************************************************************/ |
527 | /*****************************************************************************/ |
… | |
… | |
500 | |
542 | |
501 | if (syserr_cb) |
543 | if (syserr_cb) |
502 | syserr_cb (msg); |
544 | syserr_cb (msg); |
503 | else |
545 | else |
504 | { |
546 | { |
|
|
547 | #if EV_AVOID_STDIO |
|
|
548 | write (STDERR_FILENO, msg, strlen (msg)); |
|
|
549 | write (STDERR_FILENO, ": ", 2); |
|
|
550 | msg = strerror (errno); |
|
|
551 | write (STDERR_FILENO, msg, strlen (msg)); |
|
|
552 | write (STDERR_FILENO, "\n", 1); |
|
|
553 | #else |
505 | perror (msg); |
554 | perror (msg); |
|
|
555 | #endif |
506 | abort (); |
556 | abort (); |
507 | } |
557 | } |
508 | } |
558 | } |
509 | |
559 | |
510 | static void * |
560 | static void * |
… | |
… | |
535 | { |
585 | { |
536 | ptr = alloc (ptr, size); |
586 | ptr = alloc (ptr, size); |
537 | |
587 | |
538 | if (!ptr && size) |
588 | if (!ptr && size) |
539 | { |
589 | { |
|
|
590 | #if EV_AVOID_STDIO |
|
|
591 | write (STDERR_FILENO, "libev: memory allocation failed, aborting.", |
|
|
592 | sizeof ("libev: memory allocation failed, aborting.") - 1); |
|
|
593 | #else |
540 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
594 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
|
|
595 | #endif |
541 | abort (); |
596 | abort (); |
542 | } |
597 | } |
543 | |
598 | |
544 | return ptr; |
599 | return ptr; |
545 | } |
600 | } |
… | |
… | |
876 | |
931 | |
877 | #if EV_SELECT_IS_WINSOCKET |
932 | #if EV_SELECT_IS_WINSOCKET |
878 | if (events) |
933 | if (events) |
879 | { |
934 | { |
880 | unsigned long arg; |
935 | unsigned long arg; |
881 | #ifdef EV_FD_TO_WIN32_HANDLE |
|
|
882 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
936 | 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)); |
937 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
887 | } |
938 | } |
888 | #endif |
939 | #endif |
889 | |
940 | |
890 | { |
941 | { |
… | |
… | |
933 | /* check whether the given fd is atcually valid, for error recovery */ |
984 | /* check whether the given fd is atcually valid, for error recovery */ |
934 | inline_size int |
985 | inline_size int |
935 | fd_valid (int fd) |
986 | fd_valid (int fd) |
936 | { |
987 | { |
937 | #ifdef _WIN32 |
988 | #ifdef _WIN32 |
938 | return _get_osfhandle (fd) != -1; |
989 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
939 | #else |
990 | #else |
940 | return fcntl (fd, F_GETFD) != -1; |
991 | return fcntl (fd, F_GETFD) != -1; |
941 | #endif |
992 | #endif |
942 | } |
993 | } |
943 | |
994 | |
… | |
… | |
1148 | inline_speed void |
1199 | inline_speed void |
1149 | fd_intern (int fd) |
1200 | fd_intern (int fd) |
1150 | { |
1201 | { |
1151 | #ifdef _WIN32 |
1202 | #ifdef _WIN32 |
1152 | unsigned long arg = 1; |
1203 | unsigned long arg = 1; |
1153 | ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1204 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
1154 | #else |
1205 | #else |
1155 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1206 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1156 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1207 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1157 | #endif |
1208 | #endif |
1158 | } |
1209 | } |
… | |
… | |
1263 | { |
1314 | { |
1264 | #if EV_MULTIPLICITY |
1315 | #if EV_MULTIPLICITY |
1265 | EV_P = signals [signum - 1].loop; |
1316 | EV_P = signals [signum - 1].loop; |
1266 | #endif |
1317 | #endif |
1267 | |
1318 | |
1268 | #if _WIN32 |
1319 | #ifdef _WIN32 |
1269 | signal (signum, ev_sighandler); |
1320 | signal (signum, ev_sighandler); |
1270 | #endif |
1321 | #endif |
1271 | |
1322 | |
1272 | signals [signum - 1].pending = 1; |
1323 | signals [signum - 1].pending = 1; |
1273 | evpipe_write (EV_A_ &sig_pending); |
1324 | evpipe_write (EV_A_ &sig_pending); |
… | |
… | |
1574 | #endif |
1625 | #endif |
1575 | #if EV_USE_INOTIFY |
1626 | #if EV_USE_INOTIFY |
1576 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1627 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1577 | #endif |
1628 | #endif |
1578 | #if EV_USE_SIGNALFD |
1629 | #if EV_USE_SIGNALFD |
1579 | sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2; |
1630 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1580 | #endif |
1631 | #endif |
1581 | |
1632 | |
1582 | if (!(flags & 0x0000ffffU)) |
1633 | if (!(flags & 0x0000ffffU)) |
1583 | flags |= ev_recommended_backends (); |
1634 | flags |= ev_recommended_backends (); |
1584 | |
1635 | |
… | |
… | |
1621 | close (evfd); |
1672 | close (evfd); |
1622 | #endif |
1673 | #endif |
1623 | |
1674 | |
1624 | if (evpipe [0] >= 0) |
1675 | if (evpipe [0] >= 0) |
1625 | { |
1676 | { |
1626 | close (evpipe [0]); |
1677 | EV_WIN32_CLOSE_FD (evpipe [0]); |
1627 | close (evpipe [1]); |
1678 | EV_WIN32_CLOSE_FD (evpipe [1]); |
1628 | } |
1679 | } |
1629 | } |
1680 | } |
1630 | |
1681 | |
1631 | #if EV_USE_SIGNALFD |
1682 | #if EV_USE_SIGNALFD |
1632 | if (ev_is_active (&sigfd_w)) |
1683 | if (ev_is_active (&sigfd_w)) |
1633 | { |
|
|
1634 | /*ev_ref (EV_A);*/ |
|
|
1635 | /*ev_io_stop (EV_A_ &sigfd_w);*/ |
|
|
1636 | |
|
|
1637 | close (sigfd); |
1684 | close (sigfd); |
1638 | } |
|
|
1639 | #endif |
1685 | #endif |
1640 | |
1686 | |
1641 | #if EV_USE_INOTIFY |
1687 | #if EV_USE_INOTIFY |
1642 | if (fs_fd >= 0) |
1688 | if (fs_fd >= 0) |
1643 | close (fs_fd); |
1689 | close (fs_fd); |
… | |
… | |
1728 | close (evfd); |
1774 | close (evfd); |
1729 | #endif |
1775 | #endif |
1730 | |
1776 | |
1731 | if (evpipe [0] >= 0) |
1777 | if (evpipe [0] >= 0) |
1732 | { |
1778 | { |
1733 | close (evpipe [0]); |
1779 | EV_WIN32_CLOSE_FD (evpipe [0]); |
1734 | close (evpipe [1]); |
1780 | EV_WIN32_CLOSE_FD (evpipe [1]); |
1735 | } |
1781 | } |
1736 | |
1782 | |
1737 | evpipe_init (EV_A); |
1783 | evpipe_init (EV_A); |
1738 | /* now iterate over everything, in case we missed something */ |
1784 | /* now iterate over everything, in case we missed something */ |
1739 | pipecb (EV_A_ &pipe_w, EV_READ); |
1785 | pipecb (EV_A_ &pipe_w, EV_READ); |
… | |
… | |
2131 | ANHE_at_cache (*he); |
2177 | ANHE_at_cache (*he); |
2132 | } |
2178 | } |
2133 | } |
2179 | } |
2134 | |
2180 | |
2135 | /* fetch new monotonic and realtime times from the kernel */ |
2181 | /* fetch new monotonic and realtime times from the kernel */ |
2136 | /* also detetc if there was a timejump, and act accordingly */ |
2182 | /* also detect if there was a timejump, and act accordingly */ |
2137 | inline_speed void |
2183 | inline_speed void |
2138 | time_update (EV_P_ ev_tstamp max_block) |
2184 | time_update (EV_P_ ev_tstamp max_block) |
2139 | { |
2185 | { |
2140 | #if EV_USE_MONOTONIC |
2186 | #if EV_USE_MONOTONIC |
2141 | if (expect_true (have_monotonic)) |
2187 | if (expect_true (have_monotonic)) |
… | |
… | |
2475 | |
2521 | |
2476 | if (expect_false (ev_is_active (w))) |
2522 | if (expect_false (ev_is_active (w))) |
2477 | return; |
2523 | return; |
2478 | |
2524 | |
2479 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2525 | 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)))); |
2526 | assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2481 | |
2527 | |
2482 | EV_FREQUENT_CHECK; |
2528 | EV_FREQUENT_CHECK; |
2483 | |
2529 | |
2484 | ev_start (EV_A_ (W)w, 1); |
2530 | ev_start (EV_A_ (W)w, 1); |
2485 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2531 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
… | |
… | |
2555 | timers [active] = timers [timercnt + HEAP0]; |
2601 | timers [active] = timers [timercnt + HEAP0]; |
2556 | adjustheap (timers, timercnt, active); |
2602 | adjustheap (timers, timercnt, active); |
2557 | } |
2603 | } |
2558 | } |
2604 | } |
2559 | |
2605 | |
2560 | EV_FREQUENT_CHECK; |
|
|
2561 | |
|
|
2562 | ev_at (w) -= mn_now; |
2606 | ev_at (w) -= mn_now; |
2563 | |
2607 | |
2564 | ev_stop (EV_A_ (W)w); |
2608 | ev_stop (EV_A_ (W)w); |
|
|
2609 | |
|
|
2610 | EV_FREQUENT_CHECK; |
2565 | } |
2611 | } |
2566 | |
2612 | |
2567 | void noinline |
2613 | void noinline |
2568 | ev_timer_again (EV_P_ ev_timer *w) |
2614 | ev_timer_again (EV_P_ ev_timer *w) |
2569 | { |
2615 | { |
… | |
… | |
2648 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2694 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2649 | adjustheap (periodics, periodiccnt, active); |
2695 | adjustheap (periodics, periodiccnt, active); |
2650 | } |
2696 | } |
2651 | } |
2697 | } |
2652 | |
2698 | |
2653 | EV_FREQUENT_CHECK; |
|
|
2654 | |
|
|
2655 | ev_stop (EV_A_ (W)w); |
2699 | ev_stop (EV_A_ (W)w); |
|
|
2700 | |
|
|
2701 | EV_FREQUENT_CHECK; |
2656 | } |
2702 | } |
2657 | |
2703 | |
2658 | void noinline |
2704 | void noinline |
2659 | ev_periodic_again (EV_P_ ev_periodic *w) |
2705 | ev_periodic_again (EV_P_ ev_periodic *w) |
2660 | { |
2706 | { |
… | |
… | |
2721 | if (!((WL)w)->next) |
2767 | if (!((WL)w)->next) |
2722 | # if EV_USE_SIGNALFD |
2768 | # if EV_USE_SIGNALFD |
2723 | if (sigfd < 0) /*TODO*/ |
2769 | if (sigfd < 0) /*TODO*/ |
2724 | # endif |
2770 | # endif |
2725 | { |
2771 | { |
2726 | # if _WIN32 |
2772 | # ifdef _WIN32 |
|
|
2773 | evpipe_init (EV_A); |
|
|
2774 | |
2727 | signal (w->signum, ev_sighandler); |
2775 | signal (w->signum, ev_sighandler); |
2728 | # else |
2776 | # else |
2729 | struct sigaction sa; |
2777 | struct sigaction sa; |
2730 | |
2778 | |
2731 | evpipe_init (EV_A); |
2779 | evpipe_init (EV_A); |
… | |
… | |
2762 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2810 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2763 | #endif |
2811 | #endif |
2764 | #if EV_USE_SIGNALFD |
2812 | #if EV_USE_SIGNALFD |
2765 | if (sigfd >= 0) |
2813 | if (sigfd >= 0) |
2766 | { |
2814 | { |
2767 | sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D |
2815 | sigset_t ss; |
|
|
2816 | |
|
|
2817 | sigemptyset (&ss); |
|
|
2818 | sigaddset (&ss, w->signum); |
2768 | sigdelset (&sigfd_set, w->signum); |
2819 | sigdelset (&sigfd_set, w->signum); |
|
|
2820 | |
2769 | signalfd (sigfd, &sigfd_set, 0); |
2821 | signalfd (sigfd, &sigfd_set, 0); |
2770 | sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D |
2822 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
2771 | /*TODO: maybe unblock signal? */ |
|
|
2772 | } |
2823 | } |
2773 | else |
2824 | else |
2774 | #endif |
2825 | #endif |
2775 | signal (w->signum, SIG_DFL); |
2826 | signal (w->signum, SIG_DFL); |
2776 | } |
2827 | } |
… | |
… | |
2822 | #define MIN_STAT_INTERVAL 0.1074891 |
2873 | #define MIN_STAT_INTERVAL 0.1074891 |
2823 | |
2874 | |
2824 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2875 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2825 | |
2876 | |
2826 | #if EV_USE_INOTIFY |
2877 | #if EV_USE_INOTIFY |
2827 | # define EV_INOTIFY_BUFSIZE 8192 |
2878 | |
|
|
2879 | /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
|
|
2880 | # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
2828 | |
2881 | |
2829 | static void noinline |
2882 | static void noinline |
2830 | infy_add (EV_P_ ev_stat *w) |
2883 | infy_add (EV_P_ ev_stat *w) |
2831 | { |
2884 | { |
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); |
2885 | 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 | |
2886 | |
2834 | if (w->wd < 0) |
2887 | if (w->wd >= 0) |
|
|
2888 | { |
|
|
2889 | struct statfs sfs; |
|
|
2890 | |
|
|
2891 | /* now local changes will be tracked by inotify, but remote changes won't */ |
|
|
2892 | /* unless the filesystem is known to be local, we therefore still poll */ |
|
|
2893 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2894 | |
|
|
2895 | if (!fs_2625) |
|
|
2896 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
2897 | else if (!statfs (w->path, &sfs) |
|
|
2898 | && (sfs.f_type == 0x1373 /* devfs */ |
|
|
2899 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2900 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2901 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2902 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2903 | || sfs.f_type == 0x58465342 /* xfs */)) |
|
|
2904 | w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
|
|
2905 | else |
|
|
2906 | w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
2835 | { |
2907 | } |
|
|
2908 | else |
|
|
2909 | { |
|
|
2910 | /* can't use inotify, continue to stat */ |
2836 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2911 | 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 | |
2912 | |
2839 | /* monitor some parent directory for speedup hints */ |
2913 | /* 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, */ |
2914 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2841 | /* but an efficiency issue only */ |
2915 | /* but an efficiency issue only */ |
2842 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2916 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2843 | { |
2917 | { |
2844 | char path [4096]; |
2918 | char path [4096]; |
… | |
… | |
2860 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2934 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2861 | } |
2935 | } |
2862 | } |
2936 | } |
2863 | |
2937 | |
2864 | if (w->wd >= 0) |
2938 | if (w->wd >= 0) |
2865 | { |
|
|
2866 | struct statfs sfs; |
|
|
2867 | |
|
|
2868 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2939 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2869 | |
2940 | |
2870 | /* now local changes will be tracked by inotify, but remote changes won't */ |
2941 | /* now re-arm timer, if required */ |
2871 | /* unless the filesystem it known to be local, we therefore still poll */ |
2942 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
2872 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2873 | |
|
|
2874 | if (fs_2625 && !statfs (w->path, &sfs)) |
|
|
2875 | if (sfs.f_type == 0x1373 /* devfs */ |
|
|
2876 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2877 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2878 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2879 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2880 | || sfs.f_type == 0x58465342 /* xfs */) |
|
|
2881 | return; |
|
|
2882 | |
|
|
2883 | w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL; |
|
|
2884 | ev_timer_again (EV_A_ &w->timer); |
2943 | ev_timer_again (EV_A_ &w->timer); |
2885 | } |
2944 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
2886 | } |
2945 | } |
2887 | |
2946 | |
2888 | static void noinline |
2947 | static void noinline |
2889 | infy_del (EV_P_ ev_stat *w) |
2948 | infy_del (EV_P_ ev_stat *w) |
2890 | { |
2949 | { |
… | |
… | |
2935 | |
2994 | |
2936 | static void |
2995 | static void |
2937 | infy_cb (EV_P_ ev_io *w, int revents) |
2996 | infy_cb (EV_P_ ev_io *w, int revents) |
2938 | { |
2997 | { |
2939 | char buf [EV_INOTIFY_BUFSIZE]; |
2998 | char buf [EV_INOTIFY_BUFSIZE]; |
2940 | struct inotify_event *ev = (struct inotify_event *)buf; |
|
|
2941 | int ofs; |
2999 | int ofs; |
2942 | int len = read (fs_fd, buf, sizeof (buf)); |
3000 | int len = read (fs_fd, buf, sizeof (buf)); |
2943 | |
3001 | |
2944 | for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
3002 | for (ofs = 0; ofs < len; ) |
|
|
3003 | { |
|
|
3004 | struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
2945 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
3005 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
|
|
3006 | ofs += sizeof (struct inotify_event) + ev->len; |
|
|
3007 | } |
|
|
3008 | } |
|
|
3009 | |
|
|
3010 | inline_size unsigned int |
|
|
3011 | ev_linux_version (void) |
|
|
3012 | { |
|
|
3013 | struct utsname buf; |
|
|
3014 | unsigned int v; |
|
|
3015 | int i; |
|
|
3016 | char *p = buf.release; |
|
|
3017 | |
|
|
3018 | if (uname (&buf)) |
|
|
3019 | return 0; |
|
|
3020 | |
|
|
3021 | for (i = 3+1; --i; ) |
|
|
3022 | { |
|
|
3023 | unsigned int c = 0; |
|
|
3024 | |
|
|
3025 | for (;;) |
|
|
3026 | { |
|
|
3027 | if (*p >= '0' && *p <= '9') |
|
|
3028 | c = c * 10 + *p++ - '0'; |
|
|
3029 | else |
|
|
3030 | { |
|
|
3031 | p += *p == '.'; |
|
|
3032 | break; |
|
|
3033 | } |
|
|
3034 | } |
|
|
3035 | |
|
|
3036 | v = (v << 8) | c; |
|
|
3037 | } |
|
|
3038 | |
|
|
3039 | return v; |
2946 | } |
3040 | } |
2947 | |
3041 | |
2948 | inline_size void |
3042 | inline_size void |
2949 | check_2625 (EV_P) |
3043 | ev_check_2625 (EV_P) |
2950 | { |
3044 | { |
2951 | /* kernels < 2.6.25 are borked |
3045 | /* kernels < 2.6.25 are borked |
2952 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
3046 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
2953 | */ |
3047 | */ |
2954 | struct utsname buf; |
3048 | if (ev_linux_version () < 0x020619) |
2955 | int major, minor, micro; |
|
|
2956 | |
|
|
2957 | if (uname (&buf)) |
|
|
2958 | return; |
3049 | return; |
2959 | |
3050 | |
2960 | if (sscanf (buf.release, "%d.%d.%d", &major, &minor, µ) != 3) |
|
|
2961 | return; |
|
|
2962 | |
|
|
2963 | if (major < 2 |
|
|
2964 | || (major == 2 && minor < 6) |
|
|
2965 | || (major == 2 && minor == 6 && micro < 25)) |
|
|
2966 | return; |
|
|
2967 | |
|
|
2968 | fs_2625 = 1; |
3051 | fs_2625 = 1; |
|
|
3052 | } |
|
|
3053 | |
|
|
3054 | inline_size int |
|
|
3055 | infy_newfd (void) |
|
|
3056 | { |
|
|
3057 | #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
|
|
3058 | int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
|
|
3059 | if (fd >= 0) |
|
|
3060 | return fd; |
|
|
3061 | #endif |
|
|
3062 | return inotify_init (); |
2969 | } |
3063 | } |
2970 | |
3064 | |
2971 | inline_size void |
3065 | inline_size void |
2972 | infy_init (EV_P) |
3066 | infy_init (EV_P) |
2973 | { |
3067 | { |
2974 | if (fs_fd != -2) |
3068 | if (fs_fd != -2) |
2975 | return; |
3069 | return; |
2976 | |
3070 | |
2977 | fs_fd = -1; |
3071 | fs_fd = -1; |
2978 | |
3072 | |
2979 | check_2625 (EV_A); |
3073 | ev_check_2625 (EV_A); |
2980 | |
3074 | |
2981 | fs_fd = inotify_init (); |
3075 | fs_fd = infy_newfd (); |
2982 | |
3076 | |
2983 | if (fs_fd >= 0) |
3077 | if (fs_fd >= 0) |
2984 | { |
3078 | { |
|
|
3079 | fd_intern (fs_fd); |
2985 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
3080 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2986 | ev_set_priority (&fs_w, EV_MAXPRI); |
3081 | ev_set_priority (&fs_w, EV_MAXPRI); |
2987 | ev_io_start (EV_A_ &fs_w); |
3082 | ev_io_start (EV_A_ &fs_w); |
|
|
3083 | ev_unref (EV_A); |
2988 | } |
3084 | } |
2989 | } |
3085 | } |
2990 | |
3086 | |
2991 | inline_size void |
3087 | inline_size void |
2992 | infy_fork (EV_P) |
3088 | infy_fork (EV_P) |
… | |
… | |
2994 | int slot; |
3090 | int slot; |
2995 | |
3091 | |
2996 | if (fs_fd < 0) |
3092 | if (fs_fd < 0) |
2997 | return; |
3093 | return; |
2998 | |
3094 | |
|
|
3095 | ev_ref (EV_A); |
|
|
3096 | ev_io_stop (EV_A_ &fs_w); |
2999 | close (fs_fd); |
3097 | close (fs_fd); |
3000 | fs_fd = inotify_init (); |
3098 | fs_fd = infy_newfd (); |
|
|
3099 | |
|
|
3100 | if (fs_fd >= 0) |
|
|
3101 | { |
|
|
3102 | fd_intern (fs_fd); |
|
|
3103 | ev_io_set (&fs_w, fs_fd, EV_READ); |
|
|
3104 | ev_io_start (EV_A_ &fs_w); |
|
|
3105 | ev_unref (EV_A); |
|
|
3106 | } |
3001 | |
3107 | |
3002 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3108 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3003 | { |
3109 | { |
3004 | WL w_ = fs_hash [slot].head; |
3110 | WL w_ = fs_hash [slot].head; |
3005 | fs_hash [slot].head = 0; |
3111 | fs_hash [slot].head = 0; |
… | |
… | |
3012 | w->wd = -1; |
3118 | w->wd = -1; |
3013 | |
3119 | |
3014 | if (fs_fd >= 0) |
3120 | if (fs_fd >= 0) |
3015 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3121 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3016 | else |
3122 | else |
|
|
3123 | { |
|
|
3124 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3125 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
3017 | ev_timer_again (EV_A_ &w->timer); |
3126 | ev_timer_again (EV_A_ &w->timer); |
|
|
3127 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3128 | } |
3018 | } |
3129 | } |
3019 | } |
3130 | } |
3020 | } |
3131 | } |
3021 | |
3132 | |
3022 | #endif |
3133 | #endif |
… | |
… | |
3039 | static void noinline |
3150 | static void noinline |
3040 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3151 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3041 | { |
3152 | { |
3042 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3153 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3043 | |
3154 | |
3044 | /* we copy this here each the time so that */ |
3155 | ev_statdata prev = w->attr; |
3045 | /* prev has the old value when the callback gets invoked */ |
|
|
3046 | w->prev = w->attr; |
|
|
3047 | ev_stat_stat (EV_A_ w); |
3156 | ev_stat_stat (EV_A_ w); |
3048 | |
3157 | |
3049 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3158 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3050 | if ( |
3159 | if ( |
3051 | w->prev.st_dev != w->attr.st_dev |
3160 | prev.st_dev != w->attr.st_dev |
3052 | || w->prev.st_ino != w->attr.st_ino |
3161 | || prev.st_ino != w->attr.st_ino |
3053 | || w->prev.st_mode != w->attr.st_mode |
3162 | || prev.st_mode != w->attr.st_mode |
3054 | || w->prev.st_nlink != w->attr.st_nlink |
3163 | || prev.st_nlink != w->attr.st_nlink |
3055 | || w->prev.st_uid != w->attr.st_uid |
3164 | || prev.st_uid != w->attr.st_uid |
3056 | || w->prev.st_gid != w->attr.st_gid |
3165 | || prev.st_gid != w->attr.st_gid |
3057 | || w->prev.st_rdev != w->attr.st_rdev |
3166 | || prev.st_rdev != w->attr.st_rdev |
3058 | || w->prev.st_size != w->attr.st_size |
3167 | || prev.st_size != w->attr.st_size |
3059 | || w->prev.st_atime != w->attr.st_atime |
3168 | || prev.st_atime != w->attr.st_atime |
3060 | || w->prev.st_mtime != w->attr.st_mtime |
3169 | || prev.st_mtime != w->attr.st_mtime |
3061 | || w->prev.st_ctime != w->attr.st_ctime |
3170 | || prev.st_ctime != w->attr.st_ctime |
3062 | ) { |
3171 | ) { |
|
|
3172 | /* we only update w->prev on actual differences */ |
|
|
3173 | /* in case we test more often than invoke the callback, */ |
|
|
3174 | /* to ensure that prev is always different to attr */ |
|
|
3175 | w->prev = prev; |
|
|
3176 | |
3063 | #if EV_USE_INOTIFY |
3177 | #if EV_USE_INOTIFY |
3064 | if (fs_fd >= 0) |
3178 | if (fs_fd >= 0) |
3065 | { |
3179 | { |
3066 | infy_del (EV_A_ w); |
3180 | infy_del (EV_A_ w); |
3067 | infy_add (EV_A_ w); |
3181 | infy_add (EV_A_ w); |
… | |
… | |
3092 | |
3206 | |
3093 | if (fs_fd >= 0) |
3207 | if (fs_fd >= 0) |
3094 | infy_add (EV_A_ w); |
3208 | infy_add (EV_A_ w); |
3095 | else |
3209 | else |
3096 | #endif |
3210 | #endif |
|
|
3211 | { |
3097 | ev_timer_again (EV_A_ &w->timer); |
3212 | ev_timer_again (EV_A_ &w->timer); |
|
|
3213 | ev_unref (EV_A); |
|
|
3214 | } |
3098 | |
3215 | |
3099 | ev_start (EV_A_ (W)w, 1); |
3216 | ev_start (EV_A_ (W)w, 1); |
3100 | |
3217 | |
3101 | EV_FREQUENT_CHECK; |
3218 | EV_FREQUENT_CHECK; |
3102 | } |
3219 | } |
… | |
… | |
3111 | EV_FREQUENT_CHECK; |
3228 | EV_FREQUENT_CHECK; |
3112 | |
3229 | |
3113 | #if EV_USE_INOTIFY |
3230 | #if EV_USE_INOTIFY |
3114 | infy_del (EV_A_ w); |
3231 | infy_del (EV_A_ w); |
3115 | #endif |
3232 | #endif |
|
|
3233 | |
|
|
3234 | if (ev_is_active (&w->timer)) |
|
|
3235 | { |
|
|
3236 | ev_ref (EV_A); |
3116 | ev_timer_stop (EV_A_ &w->timer); |
3237 | ev_timer_stop (EV_A_ &w->timer); |
|
|
3238 | } |
3117 | |
3239 | |
3118 | ev_stop (EV_A_ (W)w); |
3240 | ev_stop (EV_A_ (W)w); |
3119 | |
3241 | |
3120 | EV_FREQUENT_CHECK; |
3242 | EV_FREQUENT_CHECK; |
3121 | } |
3243 | } |
… | |
… | |
3340 | EV_FREQUENT_CHECK; |
3462 | EV_FREQUENT_CHECK; |
3341 | |
3463 | |
3342 | ev_io_stop (EV_A_ &w->io); |
3464 | ev_io_stop (EV_A_ &w->io); |
3343 | ev_prepare_stop (EV_A_ &w->prepare); |
3465 | ev_prepare_stop (EV_A_ &w->prepare); |
3344 | ev_fork_stop (EV_A_ &w->fork); |
3466 | ev_fork_stop (EV_A_ &w->fork); |
|
|
3467 | |
|
|
3468 | ev_stop (EV_A_ (W)w); |
3345 | |
3469 | |
3346 | EV_FREQUENT_CHECK; |
3470 | EV_FREQUENT_CHECK; |
3347 | } |
3471 | } |
3348 | #endif |
3472 | #endif |
3349 | |
3473 | |