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 |
… | |
… | |
182 | # define WIN32_LEAN_AND_MEAN |
184 | # define WIN32_LEAN_AND_MEAN |
183 | # include <windows.h> |
185 | # include <windows.h> |
184 | # ifndef EV_SELECT_IS_WINSOCKET |
186 | # ifndef EV_SELECT_IS_WINSOCKET |
185 | # define EV_SELECT_IS_WINSOCKET 1 |
187 | # define EV_SELECT_IS_WINSOCKET 1 |
186 | # endif |
188 | # endif |
|
|
189 | # undef EV_AVOID_STDIO |
187 | #endif |
190 | #endif |
188 | |
191 | |
189 | /* this block tries to deduce configuration from header-defined symbols and defaults */ |
192 | /* this block tries to deduce configuration from header-defined symbols and defaults */ |
190 | |
193 | |
191 | /* try to deduce the maximum number of signals on this platform */ |
194 | /* try to deduce the maximum number of signals on this platform */ |
… | |
… | |
302 | # define EV_USE_EVENTFD 0 |
305 | # define EV_USE_EVENTFD 0 |
303 | # endif |
306 | # endif |
304 | #endif |
307 | #endif |
305 | |
308 | |
306 | #ifndef EV_USE_SIGNALFD |
309 | #ifndef EV_USE_SIGNALFD |
307 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9)) |
310 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
308 | # define EV_USE_SIGNALFD 1 |
311 | # define EV_USE_SIGNALFD 1 |
309 | # else |
312 | # else |
310 | # define EV_USE_SIGNALFD 0 |
313 | # define EV_USE_SIGNALFD 0 |
311 | # endif |
314 | # endif |
312 | #endif |
315 | #endif |
… | |
… | |
343 | # endif |
346 | # endif |
344 | #endif |
347 | #endif |
345 | |
348 | |
346 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
349 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
347 | |
350 | |
|
|
351 | #ifdef _AIX |
|
|
352 | /* AIX has a completely broken poll.h header */ |
|
|
353 | # undef EV_USE_POLL |
|
|
354 | # define EV_USE_POLL 0 |
|
|
355 | #endif |
|
|
356 | |
348 | #ifndef CLOCK_MONOTONIC |
357 | #ifndef CLOCK_MONOTONIC |
349 | # undef EV_USE_MONOTONIC |
358 | # undef EV_USE_MONOTONIC |
350 | # define EV_USE_MONOTONIC 0 |
359 | # define EV_USE_MONOTONIC 0 |
351 | #endif |
360 | #endif |
352 | |
361 | |
… | |
… | |
395 | # endif |
404 | # endif |
396 | # endif |
405 | # endif |
397 | # ifdef __cplusplus |
406 | # ifdef __cplusplus |
398 | extern "C" { |
407 | extern "C" { |
399 | # endif |
408 | # endif |
400 | int eventfd (unsigned int initval, int flags); |
409 | int (eventfd) (unsigned int initval, int flags); |
401 | # ifdef __cplusplus |
410 | # ifdef __cplusplus |
402 | } |
411 | } |
403 | # endif |
412 | # endif |
404 | #endif |
413 | #endif |
405 | |
414 | |
406 | #if EV_USE_SIGNALFD |
415 | #if EV_USE_SIGNALFD |
407 | # include <sys/signalfd.h> |
416 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
|
|
417 | # include <stdint.h> |
|
|
418 | # ifndef SFD_NONBLOCK |
|
|
419 | # define SFD_NONBLOCK O_NONBLOCK |
408 | #endif |
420 | # endif |
|
|
421 | # ifndef SFD_CLOEXEC |
|
|
422 | # ifdef O_CLOEXEC |
|
|
423 | # define SFD_CLOEXEC O_CLOEXEC |
|
|
424 | # else |
|
|
425 | # define SFD_CLOEXEC 02000000 |
|
|
426 | # endif |
|
|
427 | # endif |
|
|
428 | # ifdef __cplusplus |
|
|
429 | extern "C" { |
|
|
430 | # endif |
|
|
431 | int signalfd (int fd, const sigset_t *mask, int flags); |
|
|
432 | |
|
|
433 | struct signalfd_siginfo |
|
|
434 | { |
|
|
435 | uint32_t ssi_signo; |
|
|
436 | char pad[128 - sizeof (uint32_t)]; |
|
|
437 | }; |
|
|
438 | # ifdef __cplusplus |
|
|
439 | } |
|
|
440 | # endif |
|
|
441 | #endif |
|
|
442 | |
409 | |
443 | |
410 | /**/ |
444 | /**/ |
411 | |
445 | |
412 | #if EV_VERIFY >= 3 |
446 | #if EV_VERIFY >= 3 |
413 | # define EV_FREQUENT_CHECK ev_loop_verify (EV_A) |
447 | # define EV_FREQUENT_CHECK ev_loop_verify (EV_A) |
… | |
… | |
425 | */ |
459 | */ |
426 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
460 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
427 | |
461 | |
428 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
462 | #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) */ |
463 | #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 | |
464 | |
432 | #if __GNUC__ >= 4 |
465 | #if __GNUC__ >= 4 |
433 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
466 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
434 | # define noinline __attribute__ ((noinline)) |
467 | # define noinline __attribute__ ((noinline)) |
435 | #else |
468 | #else |
… | |
… | |
480 | |
513 | |
481 | #ifndef EV_FD_TO_WIN32_HANDLE |
514 | #ifndef EV_FD_TO_WIN32_HANDLE |
482 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
515 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
483 | #endif |
516 | #endif |
484 | #ifndef EV_WIN32_HANDLE_TO_FD |
517 | #ifndef EV_WIN32_HANDLE_TO_FD |
485 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (fd, 0) |
518 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
486 | #endif |
519 | #endif |
487 | #ifndef EV_WIN32_CLOSE_FD |
520 | #ifndef EV_WIN32_CLOSE_FD |
488 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
521 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
489 | #endif |
522 | #endif |
490 | |
523 | |
491 | #ifdef _WIN32 |
524 | #ifdef _WIN32 |
492 | # include "ev_win32.c" |
525 | # include "ev_win32.c" |
493 | #endif |
526 | #endif |
494 | |
527 | |
495 | /*****************************************************************************/ |
528 | /*****************************************************************************/ |
|
|
529 | |
|
|
530 | #if EV_AVOID_STDIO |
|
|
531 | static void noinline |
|
|
532 | ev_printerr (const char *msg) |
|
|
533 | { |
|
|
534 | write (STDERR_FILENO, msg, strlen (msg)); |
|
|
535 | } |
|
|
536 | #endif |
496 | |
537 | |
497 | static void (*syserr_cb)(const char *msg); |
538 | static void (*syserr_cb)(const char *msg); |
498 | |
539 | |
499 | void |
540 | void |
500 | ev_set_syserr_cb (void (*cb)(const char *msg)) |
541 | ev_set_syserr_cb (void (*cb)(const char *msg)) |
… | |
… | |
510 | |
551 | |
511 | if (syserr_cb) |
552 | if (syserr_cb) |
512 | syserr_cb (msg); |
553 | syserr_cb (msg); |
513 | else |
554 | else |
514 | { |
555 | { |
|
|
556 | #if EV_AVOID_STDIO |
|
|
557 | const char *err = strerror (errno); |
|
|
558 | |
|
|
559 | ev_printerr (msg); |
|
|
560 | ev_printerr (": "); |
|
|
561 | ev_printerr (err); |
|
|
562 | ev_printerr ("\n"); |
|
|
563 | #else |
515 | perror (msg); |
564 | perror (msg); |
|
|
565 | #endif |
516 | abort (); |
566 | abort (); |
517 | } |
567 | } |
518 | } |
568 | } |
519 | |
569 | |
520 | static void * |
570 | static void * |
… | |
… | |
545 | { |
595 | { |
546 | ptr = alloc (ptr, size); |
596 | ptr = alloc (ptr, size); |
547 | |
597 | |
548 | if (!ptr && size) |
598 | if (!ptr && size) |
549 | { |
599 | { |
|
|
600 | #if EV_AVOID_STDIO |
|
|
601 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
|
|
602 | #else |
550 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
603 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
|
|
604 | #endif |
551 | abort (); |
605 | abort (); |
552 | } |
606 | } |
553 | |
607 | |
554 | return ptr; |
608 | return ptr; |
555 | } |
609 | } |
… | |
… | |
939 | /* check whether the given fd is atcually valid, for error recovery */ |
993 | /* check whether the given fd is atcually valid, for error recovery */ |
940 | inline_size int |
994 | inline_size int |
941 | fd_valid (int fd) |
995 | fd_valid (int fd) |
942 | { |
996 | { |
943 | #ifdef _WIN32 |
997 | #ifdef _WIN32 |
944 | return _get_osfhandle (fd) != -1; |
998 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
945 | #else |
999 | #else |
946 | return fcntl (fd, F_GETFD) != -1; |
1000 | return fcntl (fd, F_GETFD) != -1; |
947 | #endif |
1001 | #endif |
948 | } |
1002 | } |
949 | |
1003 | |
… | |
… | |
1154 | inline_speed void |
1208 | inline_speed void |
1155 | fd_intern (int fd) |
1209 | fd_intern (int fd) |
1156 | { |
1210 | { |
1157 | #ifdef _WIN32 |
1211 | #ifdef _WIN32 |
1158 | unsigned long arg = 1; |
1212 | unsigned long arg = 1; |
1159 | ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); |
1213 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
1160 | #else |
1214 | #else |
1161 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1215 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
1162 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1216 | fcntl (fd, F_SETFL, O_NONBLOCK); |
1163 | #endif |
1217 | #endif |
1164 | } |
1218 | } |
… | |
… | |
1269 | { |
1323 | { |
1270 | #if EV_MULTIPLICITY |
1324 | #if EV_MULTIPLICITY |
1271 | EV_P = signals [signum - 1].loop; |
1325 | EV_P = signals [signum - 1].loop; |
1272 | #endif |
1326 | #endif |
1273 | |
1327 | |
1274 | #if _WIN32 |
1328 | #ifdef _WIN32 |
1275 | signal (signum, ev_sighandler); |
1329 | signal (signum, ev_sighandler); |
1276 | #endif |
1330 | #endif |
1277 | |
1331 | |
1278 | signals [signum - 1].pending = 1; |
1332 | signals [signum - 1].pending = 1; |
1279 | evpipe_write (EV_A_ &sig_pending); |
1333 | evpipe_write (EV_A_ &sig_pending); |
… | |
… | |
1580 | #endif |
1634 | #endif |
1581 | #if EV_USE_INOTIFY |
1635 | #if EV_USE_INOTIFY |
1582 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1636 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1583 | #endif |
1637 | #endif |
1584 | #if EV_USE_SIGNALFD |
1638 | #if EV_USE_SIGNALFD |
1585 | sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2; |
1639 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1586 | #endif |
1640 | #endif |
1587 | |
1641 | |
1588 | if (!(flags & 0x0000ffffU)) |
1642 | if (!(flags & 0x0000ffffU)) |
1589 | flags |= ev_recommended_backends (); |
1643 | flags |= ev_recommended_backends (); |
1590 | |
1644 | |
… | |
… | |
1634 | } |
1688 | } |
1635 | } |
1689 | } |
1636 | |
1690 | |
1637 | #if EV_USE_SIGNALFD |
1691 | #if EV_USE_SIGNALFD |
1638 | if (ev_is_active (&sigfd_w)) |
1692 | if (ev_is_active (&sigfd_w)) |
1639 | { |
|
|
1640 | /*ev_ref (EV_A);*/ |
|
|
1641 | /*ev_io_stop (EV_A_ &sigfd_w);*/ |
|
|
1642 | |
|
|
1643 | close (sigfd); |
1693 | close (sigfd); |
1644 | } |
|
|
1645 | #endif |
1694 | #endif |
1646 | |
1695 | |
1647 | #if EV_USE_INOTIFY |
1696 | #if EV_USE_INOTIFY |
1648 | if (fs_fd >= 0) |
1697 | if (fs_fd >= 0) |
1649 | close (fs_fd); |
1698 | close (fs_fd); |
… | |
… | |
2137 | ANHE_at_cache (*he); |
2186 | ANHE_at_cache (*he); |
2138 | } |
2187 | } |
2139 | } |
2188 | } |
2140 | |
2189 | |
2141 | /* fetch new monotonic and realtime times from the kernel */ |
2190 | /* fetch new monotonic and realtime times from the kernel */ |
2142 | /* also detetc if there was a timejump, and act accordingly */ |
2191 | /* also detect if there was a timejump, and act accordingly */ |
2143 | inline_speed void |
2192 | inline_speed void |
2144 | time_update (EV_P_ ev_tstamp max_block) |
2193 | time_update (EV_P_ ev_tstamp max_block) |
2145 | { |
2194 | { |
2146 | #if EV_USE_MONOTONIC |
2195 | #if EV_USE_MONOTONIC |
2147 | if (expect_true (have_monotonic)) |
2196 | if (expect_true (have_monotonic)) |
… | |
… | |
2481 | |
2530 | |
2482 | if (expect_false (ev_is_active (w))) |
2531 | if (expect_false (ev_is_active (w))) |
2483 | return; |
2532 | return; |
2484 | |
2533 | |
2485 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2534 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
2486 | assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2535 | assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
2487 | |
2536 | |
2488 | EV_FREQUENT_CHECK; |
2537 | EV_FREQUENT_CHECK; |
2489 | |
2538 | |
2490 | ev_start (EV_A_ (W)w, 1); |
2539 | ev_start (EV_A_ (W)w, 1); |
2491 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
2540 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
… | |
… | |
2561 | timers [active] = timers [timercnt + HEAP0]; |
2610 | timers [active] = timers [timercnt + HEAP0]; |
2562 | adjustheap (timers, timercnt, active); |
2611 | adjustheap (timers, timercnt, active); |
2563 | } |
2612 | } |
2564 | } |
2613 | } |
2565 | |
2614 | |
2566 | EV_FREQUENT_CHECK; |
|
|
2567 | |
|
|
2568 | ev_at (w) -= mn_now; |
2615 | ev_at (w) -= mn_now; |
2569 | |
2616 | |
2570 | ev_stop (EV_A_ (W)w); |
2617 | ev_stop (EV_A_ (W)w); |
|
|
2618 | |
|
|
2619 | EV_FREQUENT_CHECK; |
2571 | } |
2620 | } |
2572 | |
2621 | |
2573 | void noinline |
2622 | void noinline |
2574 | ev_timer_again (EV_P_ ev_timer *w) |
2623 | ev_timer_again (EV_P_ ev_timer *w) |
2575 | { |
2624 | { |
… | |
… | |
2654 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2703 | periodics [active] = periodics [periodiccnt + HEAP0]; |
2655 | adjustheap (periodics, periodiccnt, active); |
2704 | adjustheap (periodics, periodiccnt, active); |
2656 | } |
2705 | } |
2657 | } |
2706 | } |
2658 | |
2707 | |
2659 | EV_FREQUENT_CHECK; |
|
|
2660 | |
|
|
2661 | ev_stop (EV_A_ (W)w); |
2708 | ev_stop (EV_A_ (W)w); |
|
|
2709 | |
|
|
2710 | EV_FREQUENT_CHECK; |
2662 | } |
2711 | } |
2663 | |
2712 | |
2664 | void noinline |
2713 | void noinline |
2665 | ev_periodic_again (EV_P_ ev_periodic *w) |
2714 | ev_periodic_again (EV_P_ ev_periodic *w) |
2666 | { |
2715 | { |
… | |
… | |
2727 | if (!((WL)w)->next) |
2776 | if (!((WL)w)->next) |
2728 | # if EV_USE_SIGNALFD |
2777 | # if EV_USE_SIGNALFD |
2729 | if (sigfd < 0) /*TODO*/ |
2778 | if (sigfd < 0) /*TODO*/ |
2730 | # endif |
2779 | # endif |
2731 | { |
2780 | { |
2732 | # if _WIN32 |
2781 | # ifdef _WIN32 |
|
|
2782 | evpipe_init (EV_A); |
|
|
2783 | |
2733 | signal (w->signum, ev_sighandler); |
2784 | signal (w->signum, ev_sighandler); |
2734 | # else |
2785 | # else |
2735 | struct sigaction sa; |
2786 | struct sigaction sa; |
2736 | |
2787 | |
2737 | evpipe_init (EV_A); |
2788 | evpipe_init (EV_A); |
… | |
… | |
2768 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2819 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
2769 | #endif |
2820 | #endif |
2770 | #if EV_USE_SIGNALFD |
2821 | #if EV_USE_SIGNALFD |
2771 | if (sigfd >= 0) |
2822 | if (sigfd >= 0) |
2772 | { |
2823 | { |
2773 | sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D |
2824 | sigset_t ss; |
|
|
2825 | |
|
|
2826 | sigemptyset (&ss); |
|
|
2827 | sigaddset (&ss, w->signum); |
2774 | sigdelset (&sigfd_set, w->signum); |
2828 | sigdelset (&sigfd_set, w->signum); |
|
|
2829 | |
2775 | signalfd (sigfd, &sigfd_set, 0); |
2830 | signalfd (sigfd, &sigfd_set, 0); |
2776 | sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D |
2831 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
2777 | /*TODO: maybe unblock signal? */ |
|
|
2778 | } |
2832 | } |
2779 | else |
2833 | else |
2780 | #endif |
2834 | #endif |
2781 | signal (w->signum, SIG_DFL); |
2835 | signal (w->signum, SIG_DFL); |
2782 | } |
2836 | } |
… | |
… | |
2828 | #define MIN_STAT_INTERVAL 0.1074891 |
2882 | #define MIN_STAT_INTERVAL 0.1074891 |
2829 | |
2883 | |
2830 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2884 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
2831 | |
2885 | |
2832 | #if EV_USE_INOTIFY |
2886 | #if EV_USE_INOTIFY |
2833 | # define EV_INOTIFY_BUFSIZE 8192 |
2887 | |
|
|
2888 | /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
|
|
2889 | # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
2834 | |
2890 | |
2835 | static void noinline |
2891 | static void noinline |
2836 | infy_add (EV_P_ ev_stat *w) |
2892 | infy_add (EV_P_ ev_stat *w) |
2837 | { |
2893 | { |
2838 | 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); |
2894 | 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); |
2839 | |
2895 | |
2840 | if (w->wd < 0) |
2896 | if (w->wd >= 0) |
|
|
2897 | { |
|
|
2898 | struct statfs sfs; |
|
|
2899 | |
|
|
2900 | /* now local changes will be tracked by inotify, but remote changes won't */ |
|
|
2901 | /* unless the filesystem is known to be local, we therefore still poll */ |
|
|
2902 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2903 | |
|
|
2904 | if (!fs_2625) |
|
|
2905 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
2906 | else if (!statfs (w->path, &sfs) |
|
|
2907 | && (sfs.f_type == 0x1373 /* devfs */ |
|
|
2908 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2909 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2910 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2911 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2912 | || sfs.f_type == 0x58465342 /* xfs */)) |
|
|
2913 | w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
|
|
2914 | else |
|
|
2915 | w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
2841 | { |
2916 | } |
|
|
2917 | else |
|
|
2918 | { |
|
|
2919 | /* can't use inotify, continue to stat */ |
2842 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2920 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
2843 | ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ |
|
|
2844 | |
2921 | |
2845 | /* monitor some parent directory for speedup hints */ |
2922 | /* if path is not there, monitor some parent directory for speedup hints */ |
2846 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2923 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
2847 | /* but an efficiency issue only */ |
2924 | /* but an efficiency issue only */ |
2848 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2925 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
2849 | { |
2926 | { |
2850 | char path [4096]; |
2927 | char path [4096]; |
… | |
… | |
2866 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2943 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
2867 | } |
2944 | } |
2868 | } |
2945 | } |
2869 | |
2946 | |
2870 | if (w->wd >= 0) |
2947 | if (w->wd >= 0) |
2871 | { |
|
|
2872 | struct statfs sfs; |
|
|
2873 | |
|
|
2874 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2948 | wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); |
2875 | |
2949 | |
2876 | /* now local changes will be tracked by inotify, but remote changes won't */ |
2950 | /* now re-arm timer, if required */ |
2877 | /* unless the filesystem it known to be local, we therefore still poll */ |
2951 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
2878 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2879 | |
|
|
2880 | if (fs_2625 && !statfs (w->path, &sfs)) |
|
|
2881 | if (sfs.f_type == 0x1373 /* devfs */ |
|
|
2882 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2883 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2884 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2885 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2886 | || sfs.f_type == 0x58465342 /* xfs */) |
|
|
2887 | return; |
|
|
2888 | |
|
|
2889 | w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL; |
|
|
2890 | ev_timer_again (EV_A_ &w->timer); |
2952 | ev_timer_again (EV_A_ &w->timer); |
2891 | } |
2953 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
2892 | } |
2954 | } |
2893 | |
2955 | |
2894 | static void noinline |
2956 | static void noinline |
2895 | infy_del (EV_P_ ev_stat *w) |
2957 | infy_del (EV_P_ ev_stat *w) |
2896 | { |
2958 | { |
… | |
… | |
2941 | |
3003 | |
2942 | static void |
3004 | static void |
2943 | infy_cb (EV_P_ ev_io *w, int revents) |
3005 | infy_cb (EV_P_ ev_io *w, int revents) |
2944 | { |
3006 | { |
2945 | char buf [EV_INOTIFY_BUFSIZE]; |
3007 | char buf [EV_INOTIFY_BUFSIZE]; |
2946 | struct inotify_event *ev = (struct inotify_event *)buf; |
|
|
2947 | int ofs; |
3008 | int ofs; |
2948 | int len = read (fs_fd, buf, sizeof (buf)); |
3009 | int len = read (fs_fd, buf, sizeof (buf)); |
2949 | |
3010 | |
2950 | for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) |
3011 | for (ofs = 0; ofs < len; ) |
|
|
3012 | { |
|
|
3013 | struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
2951 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
3014 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
|
|
3015 | ofs += sizeof (struct inotify_event) + ev->len; |
|
|
3016 | } |
|
|
3017 | } |
|
|
3018 | |
|
|
3019 | inline_size unsigned int |
|
|
3020 | ev_linux_version (void) |
|
|
3021 | { |
|
|
3022 | struct utsname buf; |
|
|
3023 | unsigned int v; |
|
|
3024 | int i; |
|
|
3025 | char *p = buf.release; |
|
|
3026 | |
|
|
3027 | if (uname (&buf)) |
|
|
3028 | return 0; |
|
|
3029 | |
|
|
3030 | for (i = 3+1; --i; ) |
|
|
3031 | { |
|
|
3032 | unsigned int c = 0; |
|
|
3033 | |
|
|
3034 | for (;;) |
|
|
3035 | { |
|
|
3036 | if (*p >= '0' && *p <= '9') |
|
|
3037 | c = c * 10 + *p++ - '0'; |
|
|
3038 | else |
|
|
3039 | { |
|
|
3040 | p += *p == '.'; |
|
|
3041 | break; |
|
|
3042 | } |
|
|
3043 | } |
|
|
3044 | |
|
|
3045 | v = (v << 8) | c; |
|
|
3046 | } |
|
|
3047 | |
|
|
3048 | return v; |
2952 | } |
3049 | } |
2953 | |
3050 | |
2954 | inline_size void |
3051 | inline_size void |
2955 | check_2625 (EV_P) |
3052 | ev_check_2625 (EV_P) |
2956 | { |
3053 | { |
2957 | /* kernels < 2.6.25 are borked |
3054 | /* kernels < 2.6.25 are borked |
2958 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
3055 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
2959 | */ |
3056 | */ |
2960 | struct utsname buf; |
3057 | if (ev_linux_version () < 0x020619) |
2961 | int major, minor, micro; |
|
|
2962 | |
|
|
2963 | if (uname (&buf)) |
|
|
2964 | return; |
3058 | return; |
2965 | |
3059 | |
2966 | if (sscanf (buf.release, "%d.%d.%d", &major, &minor, µ) != 3) |
|
|
2967 | return; |
|
|
2968 | |
|
|
2969 | if (major < 2 |
|
|
2970 | || (major == 2 && minor < 6) |
|
|
2971 | || (major == 2 && minor == 6 && micro < 25)) |
|
|
2972 | return; |
|
|
2973 | |
|
|
2974 | fs_2625 = 1; |
3060 | fs_2625 = 1; |
|
|
3061 | } |
|
|
3062 | |
|
|
3063 | inline_size int |
|
|
3064 | infy_newfd (void) |
|
|
3065 | { |
|
|
3066 | #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
|
|
3067 | int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
|
|
3068 | if (fd >= 0) |
|
|
3069 | return fd; |
|
|
3070 | #endif |
|
|
3071 | return inotify_init (); |
2975 | } |
3072 | } |
2976 | |
3073 | |
2977 | inline_size void |
3074 | inline_size void |
2978 | infy_init (EV_P) |
3075 | infy_init (EV_P) |
2979 | { |
3076 | { |
2980 | if (fs_fd != -2) |
3077 | if (fs_fd != -2) |
2981 | return; |
3078 | return; |
2982 | |
3079 | |
2983 | fs_fd = -1; |
3080 | fs_fd = -1; |
2984 | |
3081 | |
2985 | check_2625 (EV_A); |
3082 | ev_check_2625 (EV_A); |
2986 | |
3083 | |
2987 | fs_fd = inotify_init (); |
3084 | fs_fd = infy_newfd (); |
2988 | |
3085 | |
2989 | if (fs_fd >= 0) |
3086 | if (fs_fd >= 0) |
2990 | { |
3087 | { |
|
|
3088 | fd_intern (fs_fd); |
2991 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
3089 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
2992 | ev_set_priority (&fs_w, EV_MAXPRI); |
3090 | ev_set_priority (&fs_w, EV_MAXPRI); |
2993 | ev_io_start (EV_A_ &fs_w); |
3091 | ev_io_start (EV_A_ &fs_w); |
|
|
3092 | ev_unref (EV_A); |
2994 | } |
3093 | } |
2995 | } |
3094 | } |
2996 | |
3095 | |
2997 | inline_size void |
3096 | inline_size void |
2998 | infy_fork (EV_P) |
3097 | infy_fork (EV_P) |
… | |
… | |
3000 | int slot; |
3099 | int slot; |
3001 | |
3100 | |
3002 | if (fs_fd < 0) |
3101 | if (fs_fd < 0) |
3003 | return; |
3102 | return; |
3004 | |
3103 | |
|
|
3104 | ev_ref (EV_A); |
|
|
3105 | ev_io_stop (EV_A_ &fs_w); |
3005 | close (fs_fd); |
3106 | close (fs_fd); |
3006 | fs_fd = inotify_init (); |
3107 | fs_fd = infy_newfd (); |
|
|
3108 | |
|
|
3109 | if (fs_fd >= 0) |
|
|
3110 | { |
|
|
3111 | fd_intern (fs_fd); |
|
|
3112 | ev_io_set (&fs_w, fs_fd, EV_READ); |
|
|
3113 | ev_io_start (EV_A_ &fs_w); |
|
|
3114 | ev_unref (EV_A); |
|
|
3115 | } |
3007 | |
3116 | |
3008 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3117 | for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) |
3009 | { |
3118 | { |
3010 | WL w_ = fs_hash [slot].head; |
3119 | WL w_ = fs_hash [slot].head; |
3011 | fs_hash [slot].head = 0; |
3120 | fs_hash [slot].head = 0; |
… | |
… | |
3018 | w->wd = -1; |
3127 | w->wd = -1; |
3019 | |
3128 | |
3020 | if (fs_fd >= 0) |
3129 | if (fs_fd >= 0) |
3021 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3130 | infy_add (EV_A_ w); /* re-add, no matter what */ |
3022 | else |
3131 | else |
|
|
3132 | { |
|
|
3133 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3134 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
3023 | ev_timer_again (EV_A_ &w->timer); |
3135 | ev_timer_again (EV_A_ &w->timer); |
|
|
3136 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3137 | } |
3024 | } |
3138 | } |
3025 | } |
3139 | } |
3026 | } |
3140 | } |
3027 | |
3141 | |
3028 | #endif |
3142 | #endif |
… | |
… | |
3045 | static void noinline |
3159 | static void noinline |
3046 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3160 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
3047 | { |
3161 | { |
3048 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3162 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
3049 | |
3163 | |
3050 | /* we copy this here each the time so that */ |
3164 | ev_statdata prev = w->attr; |
3051 | /* prev has the old value when the callback gets invoked */ |
|
|
3052 | w->prev = w->attr; |
|
|
3053 | ev_stat_stat (EV_A_ w); |
3165 | ev_stat_stat (EV_A_ w); |
3054 | |
3166 | |
3055 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3167 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
3056 | if ( |
3168 | if ( |
3057 | w->prev.st_dev != w->attr.st_dev |
3169 | prev.st_dev != w->attr.st_dev |
3058 | || w->prev.st_ino != w->attr.st_ino |
3170 | || prev.st_ino != w->attr.st_ino |
3059 | || w->prev.st_mode != w->attr.st_mode |
3171 | || prev.st_mode != w->attr.st_mode |
3060 | || w->prev.st_nlink != w->attr.st_nlink |
3172 | || prev.st_nlink != w->attr.st_nlink |
3061 | || w->prev.st_uid != w->attr.st_uid |
3173 | || prev.st_uid != w->attr.st_uid |
3062 | || w->prev.st_gid != w->attr.st_gid |
3174 | || prev.st_gid != w->attr.st_gid |
3063 | || w->prev.st_rdev != w->attr.st_rdev |
3175 | || prev.st_rdev != w->attr.st_rdev |
3064 | || w->prev.st_size != w->attr.st_size |
3176 | || prev.st_size != w->attr.st_size |
3065 | || w->prev.st_atime != w->attr.st_atime |
3177 | || prev.st_atime != w->attr.st_atime |
3066 | || w->prev.st_mtime != w->attr.st_mtime |
3178 | || prev.st_mtime != w->attr.st_mtime |
3067 | || w->prev.st_ctime != w->attr.st_ctime |
3179 | || prev.st_ctime != w->attr.st_ctime |
3068 | ) { |
3180 | ) { |
|
|
3181 | /* we only update w->prev on actual differences */ |
|
|
3182 | /* in case we test more often than invoke the callback, */ |
|
|
3183 | /* to ensure that prev is always different to attr */ |
|
|
3184 | w->prev = prev; |
|
|
3185 | |
3069 | #if EV_USE_INOTIFY |
3186 | #if EV_USE_INOTIFY |
3070 | if (fs_fd >= 0) |
3187 | if (fs_fd >= 0) |
3071 | { |
3188 | { |
3072 | infy_del (EV_A_ w); |
3189 | infy_del (EV_A_ w); |
3073 | infy_add (EV_A_ w); |
3190 | infy_add (EV_A_ w); |
… | |
… | |
3098 | |
3215 | |
3099 | if (fs_fd >= 0) |
3216 | if (fs_fd >= 0) |
3100 | infy_add (EV_A_ w); |
3217 | infy_add (EV_A_ w); |
3101 | else |
3218 | else |
3102 | #endif |
3219 | #endif |
|
|
3220 | { |
3103 | ev_timer_again (EV_A_ &w->timer); |
3221 | ev_timer_again (EV_A_ &w->timer); |
|
|
3222 | ev_unref (EV_A); |
|
|
3223 | } |
3104 | |
3224 | |
3105 | ev_start (EV_A_ (W)w, 1); |
3225 | ev_start (EV_A_ (W)w, 1); |
3106 | |
3226 | |
3107 | EV_FREQUENT_CHECK; |
3227 | EV_FREQUENT_CHECK; |
3108 | } |
3228 | } |
… | |
… | |
3117 | EV_FREQUENT_CHECK; |
3237 | EV_FREQUENT_CHECK; |
3118 | |
3238 | |
3119 | #if EV_USE_INOTIFY |
3239 | #if EV_USE_INOTIFY |
3120 | infy_del (EV_A_ w); |
3240 | infy_del (EV_A_ w); |
3121 | #endif |
3241 | #endif |
|
|
3242 | |
|
|
3243 | if (ev_is_active (&w->timer)) |
|
|
3244 | { |
|
|
3245 | ev_ref (EV_A); |
3122 | ev_timer_stop (EV_A_ &w->timer); |
3246 | ev_timer_stop (EV_A_ &w->timer); |
|
|
3247 | } |
3123 | |
3248 | |
3124 | ev_stop (EV_A_ (W)w); |
3249 | ev_stop (EV_A_ (W)w); |
3125 | |
3250 | |
3126 | EV_FREQUENT_CHECK; |
3251 | EV_FREQUENT_CHECK; |
3127 | } |
3252 | } |
… | |
… | |
3346 | EV_FREQUENT_CHECK; |
3471 | EV_FREQUENT_CHECK; |
3347 | |
3472 | |
3348 | ev_io_stop (EV_A_ &w->io); |
3473 | ev_io_stop (EV_A_ &w->io); |
3349 | ev_prepare_stop (EV_A_ &w->prepare); |
3474 | ev_prepare_stop (EV_A_ &w->prepare); |
3350 | ev_fork_stop (EV_A_ &w->fork); |
3475 | ev_fork_stop (EV_A_ &w->fork); |
|
|
3476 | |
|
|
3477 | ev_stop (EV_A_ (W)w); |
3351 | |
3478 | |
3352 | EV_FREQUENT_CHECK; |
3479 | EV_FREQUENT_CHECK; |
3353 | } |
3480 | } |
3354 | #endif |
3481 | #endif |
3355 | |
3482 | |