1 | /* |
1 | /* |
2 | * libev event processing core, watcher management |
2 | * libev event processing core, watcher management |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 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 | * |
10 | * 1. Redistributions of source code must retain the above copyright notice, |
10 | * 1. Redistributions of source code must retain the above copyright notice, |
11 | * this list of conditions and the following disclaimer. |
11 | * this list of conditions and the following disclaimer. |
12 | * |
12 | * |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
15 | * documentation and/or other materials provided with the distribution. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
42 | # ifdef EV_CONFIG_H |
42 | # ifdef EV_CONFIG_H |
43 | # include EV_CONFIG_H |
43 | # include EV_CONFIG_H |
44 | # else |
44 | # else |
45 | # include "config.h" |
45 | # include "config.h" |
46 | # endif |
46 | # endif |
|
|
47 | |
|
|
48 | #if HAVE_FLOOR |
|
|
49 | # ifndef EV_USE_FLOOR |
|
|
50 | # define EV_USE_FLOOR 1 |
|
|
51 | # endif |
|
|
52 | #endif |
47 | |
53 | |
48 | # if HAVE_CLOCK_SYSCALL |
54 | # if HAVE_CLOCK_SYSCALL |
49 | # ifndef EV_USE_CLOCK_SYSCALL |
55 | # ifndef EV_USE_CLOCK_SYSCALL |
50 | # define EV_USE_CLOCK_SYSCALL 1 |
56 | # define EV_USE_CLOCK_SYSCALL 1 |
51 | # ifndef EV_USE_REALTIME |
57 | # ifndef EV_USE_REALTIME |
… | |
… | |
156 | # define EV_USE_EVENTFD 0 |
162 | # define EV_USE_EVENTFD 0 |
157 | # endif |
163 | # endif |
158 | |
164 | |
159 | #endif |
165 | #endif |
160 | |
166 | |
161 | #include <math.h> |
|
|
162 | #include <stdlib.h> |
167 | #include <stdlib.h> |
163 | #include <string.h> |
168 | #include <string.h> |
164 | #include <fcntl.h> |
169 | #include <fcntl.h> |
165 | #include <stddef.h> |
170 | #include <stddef.h> |
166 | |
171 | |
… | |
… | |
232 | /* to make it compile regardless, just remove the above line, */ |
237 | /* to make it compile regardless, just remove the above line, */ |
233 | /* but consider reporting it, too! :) */ |
238 | /* but consider reporting it, too! :) */ |
234 | # define EV_NSIG 65 |
239 | # define EV_NSIG 65 |
235 | #endif |
240 | #endif |
236 | |
241 | |
|
|
242 | #ifndef EV_USE_FLOOR |
|
|
243 | # define EV_USE_FLOOR 0 |
|
|
244 | #endif |
|
|
245 | |
237 | #ifndef EV_USE_CLOCK_SYSCALL |
246 | #ifndef EV_USE_CLOCK_SYSCALL |
238 | # if __linux && __GLIBC__ >= 2 |
247 | # if __linux && __GLIBC__ >= 2 |
239 | # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS |
248 | # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS |
240 | # else |
249 | # else |
241 | # define EV_USE_CLOCK_SYSCALL 0 |
250 | # define EV_USE_CLOCK_SYSCALL 0 |
… | |
… | |
376 | # undef EV_USE_INOTIFY |
385 | # undef EV_USE_INOTIFY |
377 | # define EV_USE_INOTIFY 0 |
386 | # define EV_USE_INOTIFY 0 |
378 | #endif |
387 | #endif |
379 | |
388 | |
380 | #if !EV_USE_NANOSLEEP |
389 | #if !EV_USE_NANOSLEEP |
381 | # ifndef _WIN32 |
390 | /* hp-ux has it in sys/time.h, which we unconditionally include above */ |
|
|
391 | # if !defined(_WIN32) && !defined(__hpux) |
382 | # include <sys/select.h> |
392 | # include <sys/select.h> |
383 | # endif |
393 | # endif |
384 | #endif |
394 | #endif |
385 | |
395 | |
386 | #if EV_USE_INOTIFY |
396 | #if EV_USE_INOTIFY |
… | |
… | |
442 | #else |
452 | #else |
443 | # define EV_FREQUENT_CHECK do { } while (0) |
453 | # define EV_FREQUENT_CHECK do { } while (0) |
444 | #endif |
454 | #endif |
445 | |
455 | |
446 | /* |
456 | /* |
447 | * This is used to avoid floating point rounding problems. |
457 | * This is used to work around floating point rounding problems. |
448 | * It is added to ev_rt_now when scheduling periodics |
|
|
449 | * to ensure progress, time-wise, even when rounding |
|
|
450 | * errors are against us. |
|
|
451 | * This value is good at least till the year 4000. |
458 | * This value is good at least till the year 4000. |
452 | * Better solutions welcome. |
|
|
453 | */ |
459 | */ |
454 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
460 | #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */ |
|
|
461 | /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */ |
455 | |
462 | |
456 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
463 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
457 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
464 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
458 | |
465 | |
459 | #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) |
466 | #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) |
… | |
… | |
518 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
525 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
519 | #endif |
526 | #endif |
520 | |
527 | |
521 | #ifdef _WIN32 |
528 | #ifdef _WIN32 |
522 | # include "ev_win32.c" |
529 | # include "ev_win32.c" |
|
|
530 | #endif |
|
|
531 | |
|
|
532 | /*****************************************************************************/ |
|
|
533 | |
|
|
534 | /* define a suitable floor function (only used by periodics atm) */ |
|
|
535 | |
|
|
536 | #if EV_USE_FLOOR |
|
|
537 | # include <math.h> |
|
|
538 | # define ev_floor(v) floor (v) |
|
|
539 | #else |
|
|
540 | |
|
|
541 | #include <float.h> |
|
|
542 | |
|
|
543 | /* a floor() replacement function, should be independent of ev_tstamp type */ |
|
|
544 | static ev_tstamp noinline |
|
|
545 | ev_floor (ev_tstamp v) |
|
|
546 | { |
|
|
547 | /* the choice of shift factor is not terribly important */ |
|
|
548 | #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */ |
|
|
549 | const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.; |
|
|
550 | #else |
|
|
551 | const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.; |
|
|
552 | #endif |
|
|
553 | |
|
|
554 | /* argument too large for an unsigned long? */ |
|
|
555 | if (expect_false (v >= shift)) |
|
|
556 | { |
|
|
557 | ev_tstamp f; |
|
|
558 | |
|
|
559 | if (v == v - 1.) |
|
|
560 | return v; /* very large number */ |
|
|
561 | |
|
|
562 | f = shift * ev_floor (v * (1. / shift)); |
|
|
563 | return f + ev_floor (v - f); |
|
|
564 | } |
|
|
565 | |
|
|
566 | /* special treatment for negative args? */ |
|
|
567 | if (expect_false (v < 0.)) |
|
|
568 | { |
|
|
569 | ev_tstamp f = -ev_floor (-v); |
|
|
570 | |
|
|
571 | return f - (f == v ? 0 : 1); |
|
|
572 | } |
|
|
573 | |
|
|
574 | /* fits into an unsigned long */ |
|
|
575 | return (unsigned long)v; |
|
|
576 | } |
|
|
577 | |
523 | #endif |
578 | #endif |
524 | |
579 | |
525 | /*****************************************************************************/ |
580 | /*****************************************************************************/ |
526 | |
581 | |
527 | #ifdef __linux |
582 | #ifdef __linux |
… | |
… | |
591 | if (syserr_cb) |
646 | if (syserr_cb) |
592 | syserr_cb (msg); |
647 | syserr_cb (msg); |
593 | else |
648 | else |
594 | { |
649 | { |
595 | #if EV_AVOID_STDIO |
650 | #if EV_AVOID_STDIO |
596 | const char *err = strerror (errno); |
|
|
597 | |
|
|
598 | ev_printerr (msg); |
651 | ev_printerr (msg); |
599 | ev_printerr (": "); |
652 | ev_printerr (": "); |
600 | ev_printerr (err); |
653 | ev_printerr (strerror (errno)); |
601 | ev_printerr ("\n"); |
654 | ev_printerr ("\n"); |
602 | #else |
655 | #else |
603 | perror (msg); |
656 | perror (msg); |
604 | #endif |
657 | #endif |
605 | abort (); |
658 | abort (); |
… | |
… | |
639 | ptr = alloc (ptr, size); |
692 | ptr = alloc (ptr, size); |
640 | |
693 | |
641 | if (!ptr && size) |
694 | if (!ptr && size) |
642 | { |
695 | { |
643 | #if EV_AVOID_STDIO |
696 | #if EV_AVOID_STDIO |
644 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
697 | ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
645 | #else |
698 | #else |
646 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
699 | fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
647 | #endif |
700 | #endif |
648 | abort (); |
701 | abort (); |
649 | } |
702 | } |
650 | |
703 | |
651 | return ptr; |
704 | return ptr; |
… | |
… | |
967 | inline_size void |
1020 | inline_size void |
968 | fd_reify (EV_P) |
1021 | fd_reify (EV_P) |
969 | { |
1022 | { |
970 | int i; |
1023 | int i; |
971 | |
1024 | |
|
|
1025 | #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
|
|
1026 | for (i = 0; i < fdchangecnt; ++i) |
|
|
1027 | { |
|
|
1028 | int fd = fdchanges [i]; |
|
|
1029 | ANFD *anfd = anfds + fd; |
|
|
1030 | |
|
|
1031 | if (anfd->reify & EV__IOFDSET && anfd->head) |
|
|
1032 | { |
|
|
1033 | SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd); |
|
|
1034 | |
|
|
1035 | if (handle != anfd->handle) |
|
|
1036 | { |
|
|
1037 | unsigned long arg; |
|
|
1038 | |
|
|
1039 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0)); |
|
|
1040 | |
|
|
1041 | /* handle changed, but fd didn't - we need to do it in two steps */ |
|
|
1042 | backend_modify (EV_A_ fd, anfd->events, 0); |
|
|
1043 | anfd->events = 0; |
|
|
1044 | anfd->handle = handle; |
|
|
1045 | } |
|
|
1046 | } |
|
|
1047 | } |
|
|
1048 | #endif |
|
|
1049 | |
972 | for (i = 0; i < fdchangecnt; ++i) |
1050 | for (i = 0; i < fdchangecnt; ++i) |
973 | { |
1051 | { |
974 | int fd = fdchanges [i]; |
1052 | int fd = fdchanges [i]; |
975 | ANFD *anfd = anfds + fd; |
1053 | ANFD *anfd = anfds + fd; |
976 | ev_io *w; |
1054 | ev_io *w; |
977 | |
1055 | |
978 | unsigned char o_events = anfd->events; |
1056 | unsigned char o_events = anfd->events; |
979 | unsigned char o_reify = anfd->reify; |
1057 | unsigned char o_reify = anfd->reify; |
980 | |
1058 | |
981 | anfd->reify = 0; |
1059 | anfd->reify = 0; |
982 | |
|
|
983 | #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP |
|
|
984 | if (o_reify & EV__IOFDSET) |
|
|
985 | { |
|
|
986 | unsigned long arg; |
|
|
987 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
|
|
988 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
|
|
989 | printf ("oi %d %x\n", fd, anfd->handle);//D |
|
|
990 | } |
|
|
991 | #endif |
|
|
992 | |
1060 | |
993 | /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ |
1061 | /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ |
994 | { |
1062 | { |
995 | anfd->events = 0; |
1063 | anfd->events = 0; |
996 | |
1064 | |
… | |
… | |
1300 | inline_size void |
1368 | inline_size void |
1301 | evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
1369 | evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
1302 | { |
1370 | { |
1303 | if (!*flag) |
1371 | if (!*flag) |
1304 | { |
1372 | { |
1305 | int old_errno = errno; /* save errno because write might clobber it */ |
|
|
1306 | char dummy; |
|
|
1307 | |
|
|
1308 | *flag = 1; |
1373 | *flag = 1; |
1309 | |
1374 | |
|
|
1375 | pipe_write_skipped = 1; |
|
|
1376 | |
|
|
1377 | if (pipe_write_wanted) |
|
|
1378 | { |
|
|
1379 | int old_errno = errno; /* save errno because write will clobber it */ |
|
|
1380 | char dummy; |
|
|
1381 | |
|
|
1382 | pipe_write_skipped = 0; |
|
|
1383 | |
1310 | #if EV_USE_EVENTFD |
1384 | #if EV_USE_EVENTFD |
1311 | if (evfd >= 0) |
1385 | if (evfd >= 0) |
1312 | { |
1386 | { |
1313 | uint64_t counter = 1; |
1387 | uint64_t counter = 1; |
1314 | write (evfd, &counter, sizeof (uint64_t)); |
1388 | write (evfd, &counter, sizeof (uint64_t)); |
|
|
1389 | } |
|
|
1390 | else |
|
|
1391 | #endif |
|
|
1392 | { |
|
|
1393 | /* win32 people keep sending patches that change this write() to send() */ |
|
|
1394 | /* and then run away. but send() is wrong, it wants a socket handle on win32 */ |
|
|
1395 | /* so when you think this write should be a send instead, please find out */ |
|
|
1396 | /* where your send() is from - it's definitely not the microsoft send, and */ |
|
|
1397 | /* tell me. thank you. */ |
|
|
1398 | write (evpipe [1], &dummy, 1); |
|
|
1399 | } |
|
|
1400 | |
|
|
1401 | errno = old_errno; |
1315 | } |
1402 | } |
1316 | else |
|
|
1317 | #endif |
|
|
1318 | /* win32 people keep sending patches that change this write() to send() */ |
|
|
1319 | /* and then run away. but send() is wrong, it wants a socket handle on win32 */ |
|
|
1320 | /* so when you think this write should be a send instead, please find out */ |
|
|
1321 | /* where your send() is from - it's definitely not the microsoft send, and */ |
|
|
1322 | /* tell me. thank you. */ |
|
|
1323 | write (evpipe [1], &dummy, 1); |
|
|
1324 | |
|
|
1325 | errno = old_errno; |
|
|
1326 | } |
1403 | } |
1327 | } |
1404 | } |
1328 | |
1405 | |
1329 | /* called whenever the libev signal pipe */ |
1406 | /* called whenever the libev signal pipe */ |
1330 | /* got some events (signal, async) */ |
1407 | /* got some events (signal, async) */ |
1331 | static void |
1408 | static void |
1332 | pipecb (EV_P_ ev_io *iow, int revents) |
1409 | pipecb (EV_P_ ev_io *iow, int revents) |
1333 | { |
1410 | { |
1334 | int i; |
1411 | int i; |
1335 | |
1412 | |
|
|
1413 | if (revents & EV_READ) |
|
|
1414 | { |
1336 | #if EV_USE_EVENTFD |
1415 | #if EV_USE_EVENTFD |
1337 | if (evfd >= 0) |
1416 | if (evfd >= 0) |
1338 | { |
1417 | { |
1339 | uint64_t counter; |
1418 | uint64_t counter; |
1340 | read (evfd, &counter, sizeof (uint64_t)); |
1419 | read (evfd, &counter, sizeof (uint64_t)); |
1341 | } |
1420 | } |
1342 | else |
1421 | else |
1343 | #endif |
1422 | #endif |
1344 | { |
1423 | { |
1345 | char dummy; |
1424 | char dummy; |
1346 | /* see discussion in evpipe_write when you think this read should be recv in win32 */ |
1425 | /* see discussion in evpipe_write when you think this read should be recv in win32 */ |
1347 | read (evpipe [0], &dummy, 1); |
1426 | read (evpipe [0], &dummy, 1); |
|
|
1427 | } |
1348 | } |
1428 | } |
1349 | |
1429 | |
|
|
1430 | pipe_write_skipped = 0; |
|
|
1431 | |
|
|
1432 | #if EV_SIGNAL_ENABLE |
1350 | if (sig_pending) |
1433 | if (sig_pending) |
1351 | { |
1434 | { |
1352 | sig_pending = 0; |
1435 | sig_pending = 0; |
1353 | |
1436 | |
1354 | for (i = EV_NSIG - 1; i--; ) |
1437 | for (i = EV_NSIG - 1; i--; ) |
1355 | if (expect_false (signals [i].pending)) |
1438 | if (expect_false (signals [i].pending)) |
1356 | ev_feed_signal_event (EV_A_ i + 1); |
1439 | ev_feed_signal_event (EV_A_ i + 1); |
1357 | } |
1440 | } |
|
|
1441 | #endif |
1358 | |
1442 | |
1359 | #if EV_ASYNC_ENABLE |
1443 | #if EV_ASYNC_ENABLE |
1360 | if (async_pending) |
1444 | if (async_pending) |
1361 | { |
1445 | { |
1362 | async_pending = 0; |
1446 | async_pending = 0; |
… | |
… | |
1371 | #endif |
1455 | #endif |
1372 | } |
1456 | } |
1373 | |
1457 | |
1374 | /*****************************************************************************/ |
1458 | /*****************************************************************************/ |
1375 | |
1459 | |
|
|
1460 | void |
|
|
1461 | ev_feed_signal (int signum) |
|
|
1462 | { |
|
|
1463 | #if EV_MULTIPLICITY |
|
|
1464 | EV_P = signals [signum - 1].loop; |
|
|
1465 | |
|
|
1466 | if (!EV_A) |
|
|
1467 | return; |
|
|
1468 | #endif |
|
|
1469 | |
|
|
1470 | evpipe_init (EV_A); |
|
|
1471 | |
|
|
1472 | signals [signum - 1].pending = 1; |
|
|
1473 | evpipe_write (EV_A_ &sig_pending); |
|
|
1474 | } |
|
|
1475 | |
1376 | static void |
1476 | static void |
1377 | ev_sighandler (int signum) |
1477 | ev_sighandler (int signum) |
1378 | { |
1478 | { |
1379 | #if EV_MULTIPLICITY |
|
|
1380 | EV_P = signals [signum - 1].loop; |
|
|
1381 | #endif |
|
|
1382 | |
|
|
1383 | #ifdef _WIN32 |
1479 | #ifdef _WIN32 |
1384 | signal (signum, ev_sighandler); |
1480 | signal (signum, ev_sighandler); |
1385 | #endif |
1481 | #endif |
1386 | |
1482 | |
1387 | signals [signum - 1].pending = 1; |
1483 | ev_feed_signal (signum); |
1388 | evpipe_write (EV_A_ &sig_pending); |
|
|
1389 | } |
1484 | } |
1390 | |
1485 | |
1391 | void noinline |
1486 | void noinline |
1392 | ev_feed_signal_event (EV_P_ int signum) |
1487 | ev_feed_signal_event (EV_P_ int signum) |
1393 | { |
1488 | { |
… | |
… | |
1645 | static void noinline |
1740 | static void noinline |
1646 | loop_init (EV_P_ unsigned int flags) |
1741 | loop_init (EV_P_ unsigned int flags) |
1647 | { |
1742 | { |
1648 | if (!backend) |
1743 | if (!backend) |
1649 | { |
1744 | { |
|
|
1745 | origflags = flags; |
|
|
1746 | |
1650 | #if EV_USE_REALTIME |
1747 | #if EV_USE_REALTIME |
1651 | if (!have_realtime) |
1748 | if (!have_realtime) |
1652 | { |
1749 | { |
1653 | struct timespec ts; |
1750 | struct timespec ts; |
1654 | |
1751 | |
… | |
… | |
1676 | if (!(flags & EVFLAG_NOENV) |
1773 | if (!(flags & EVFLAG_NOENV) |
1677 | && !enable_secure () |
1774 | && !enable_secure () |
1678 | && getenv ("LIBEV_FLAGS")) |
1775 | && getenv ("LIBEV_FLAGS")) |
1679 | flags = atoi (getenv ("LIBEV_FLAGS")); |
1776 | flags = atoi (getenv ("LIBEV_FLAGS")); |
1680 | |
1777 | |
1681 | ev_rt_now = ev_time (); |
1778 | ev_rt_now = ev_time (); |
1682 | mn_now = get_clock (); |
1779 | mn_now = get_clock (); |
1683 | now_floor = mn_now; |
1780 | now_floor = mn_now; |
1684 | rtmn_diff = ev_rt_now - mn_now; |
1781 | rtmn_diff = ev_rt_now - mn_now; |
1685 | #if EV_FEATURE_API |
1782 | #if EV_FEATURE_API |
1686 | invoke_cb = ev_invoke_pending; |
1783 | invoke_cb = ev_invoke_pending; |
1687 | #endif |
1784 | #endif |
1688 | |
1785 | |
1689 | io_blocktime = 0.; |
1786 | io_blocktime = 0.; |
1690 | timeout_blocktime = 0.; |
1787 | timeout_blocktime = 0.; |
1691 | backend = 0; |
1788 | backend = 0; |
1692 | backend_fd = -1; |
1789 | backend_fd = -1; |
1693 | sig_pending = 0; |
1790 | sig_pending = 0; |
1694 | #if EV_ASYNC_ENABLE |
1791 | #if EV_ASYNC_ENABLE |
1695 | async_pending = 0; |
1792 | async_pending = 0; |
1696 | #endif |
1793 | #endif |
|
|
1794 | pipe_write_skipped = 0; |
|
|
1795 | pipe_write_wanted = 0; |
1697 | #if EV_USE_INOTIFY |
1796 | #if EV_USE_INOTIFY |
1698 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1797 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
1699 | #endif |
1798 | #endif |
1700 | #if EV_USE_SIGNALFD |
1799 | #if EV_USE_SIGNALFD |
1701 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1800 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1702 | #endif |
1801 | #endif |
1703 | |
1802 | |
1704 | if (!(flags & 0x0000ffffU)) |
1803 | if (!(flags & EVBACKEND_MASK)) |
1705 | flags |= ev_recommended_backends (); |
1804 | flags |= ev_recommended_backends (); |
1706 | |
1805 | |
1707 | #if EV_USE_IOCP |
1806 | #if EV_USE_IOCP |
1708 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1807 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1709 | #endif |
1808 | #endif |
… | |
… | |
1735 | /* free up a loop structure */ |
1834 | /* free up a loop structure */ |
1736 | void |
1835 | void |
1737 | ev_loop_destroy (EV_P) |
1836 | ev_loop_destroy (EV_P) |
1738 | { |
1837 | { |
1739 | int i; |
1838 | int i; |
|
|
1839 | |
|
|
1840 | #if EV_MULTIPLICITY |
|
|
1841 | /* mimic free (0) */ |
|
|
1842 | if (!EV_A) |
|
|
1843 | return; |
|
|
1844 | #endif |
|
|
1845 | |
|
|
1846 | #if EV_CLEANUP_ENABLE |
|
|
1847 | /* queue cleanup watchers (and execute them) */ |
|
|
1848 | if (expect_false (cleanupcnt)) |
|
|
1849 | { |
|
|
1850 | queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
|
|
1851 | EV_INVOKE_PENDING; |
|
|
1852 | } |
|
|
1853 | #endif |
1740 | |
1854 | |
1741 | #if EV_CHILD_ENABLE |
1855 | #if EV_CHILD_ENABLE |
1742 | if (ev_is_active (&childev)) |
1856 | if (ev_is_active (&childev)) |
1743 | { |
1857 | { |
1744 | ev_ref (EV_A); /* child watcher */ |
1858 | ev_ref (EV_A); /* child watcher */ |
… | |
… | |
1856 | infy_fork (EV_A); |
1970 | infy_fork (EV_A); |
1857 | #endif |
1971 | #endif |
1858 | |
1972 | |
1859 | if (ev_is_active (&pipe_w)) |
1973 | if (ev_is_active (&pipe_w)) |
1860 | { |
1974 | { |
1861 | /* this "locks" the handlers against writing to the pipe */ |
1975 | /* pipe_write_wanted must be false now, so modifying fd vars should be safe */ |
1862 | /* while we modify the fd vars */ |
|
|
1863 | sig_pending = 1; |
|
|
1864 | #if EV_ASYNC_ENABLE |
|
|
1865 | async_pending = 1; |
|
|
1866 | #endif |
|
|
1867 | |
1976 | |
1868 | ev_ref (EV_A); |
1977 | ev_ref (EV_A); |
1869 | ev_io_stop (EV_A_ &pipe_w); |
1978 | ev_io_stop (EV_A_ &pipe_w); |
1870 | |
1979 | |
1871 | #if EV_USE_EVENTFD |
1980 | #if EV_USE_EVENTFD |
… | |
… | |
2087 | for (pri = NUMPRI; pri--; ) |
2196 | for (pri = NUMPRI; pri--; ) |
2088 | while (pendingcnt [pri]) |
2197 | while (pendingcnt [pri]) |
2089 | { |
2198 | { |
2090 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2199 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2091 | |
2200 | |
2092 | /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
|
|
2093 | /* ^ this is no longer true, as pending_w could be here */ |
|
|
2094 | |
|
|
2095 | p->w->pending = 0; |
2201 | p->w->pending = 0; |
2096 | EV_CB_INVOKE (p->w, p->events); |
2202 | EV_CB_INVOKE (p->w, p->events); |
2097 | EV_FREQUENT_CHECK; |
2203 | EV_FREQUENT_CHECK; |
2098 | } |
2204 | } |
2099 | } |
2205 | } |
… | |
… | |
2160 | feed_reverse_done (EV_A_ EV_TIMER); |
2266 | feed_reverse_done (EV_A_ EV_TIMER); |
2161 | } |
2267 | } |
2162 | } |
2268 | } |
2163 | |
2269 | |
2164 | #if EV_PERIODIC_ENABLE |
2270 | #if EV_PERIODIC_ENABLE |
|
|
2271 | |
|
|
2272 | static void noinline |
|
|
2273 | periodic_recalc (EV_P_ ev_periodic *w) |
|
|
2274 | { |
|
|
2275 | ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL; |
|
|
2276 | ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval); |
|
|
2277 | |
|
|
2278 | /* the above almost always errs on the low side */ |
|
|
2279 | while (at <= ev_rt_now) |
|
|
2280 | { |
|
|
2281 | ev_tstamp nat = at + w->interval; |
|
|
2282 | |
|
|
2283 | /* when resolution fails us, we use ev_rt_now */ |
|
|
2284 | if (expect_false (nat == at)) |
|
|
2285 | { |
|
|
2286 | at = ev_rt_now; |
|
|
2287 | break; |
|
|
2288 | } |
|
|
2289 | |
|
|
2290 | at = nat; |
|
|
2291 | } |
|
|
2292 | |
|
|
2293 | ev_at (w) = at; |
|
|
2294 | } |
|
|
2295 | |
2165 | /* make periodics pending */ |
2296 | /* make periodics pending */ |
2166 | inline_size void |
2297 | inline_size void |
2167 | periodics_reify (EV_P) |
2298 | periodics_reify (EV_P) |
2168 | { |
2299 | { |
2169 | EV_FREQUENT_CHECK; |
2300 | EV_FREQUENT_CHECK; |
… | |
… | |
2188 | ANHE_at_cache (periodics [HEAP0]); |
2319 | ANHE_at_cache (periodics [HEAP0]); |
2189 | downheap (periodics, periodiccnt, HEAP0); |
2320 | downheap (periodics, periodiccnt, HEAP0); |
2190 | } |
2321 | } |
2191 | else if (w->interval) |
2322 | else if (w->interval) |
2192 | { |
2323 | { |
2193 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2324 | periodic_recalc (EV_A_ w); |
2194 | /* if next trigger time is not sufficiently in the future, put it there */ |
|
|
2195 | /* this might happen because of floating point inexactness */ |
|
|
2196 | if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
|
|
2197 | { |
|
|
2198 | ev_at (w) += w->interval; |
|
|
2199 | |
|
|
2200 | /* if interval is unreasonably low we might still have a time in the past */ |
|
|
2201 | /* so correct this. this will make the periodic very inexact, but the user */ |
|
|
2202 | /* has effectively asked to get triggered more often than possible */ |
|
|
2203 | if (ev_at (w) < ev_rt_now) |
|
|
2204 | ev_at (w) = ev_rt_now; |
|
|
2205 | } |
|
|
2206 | |
|
|
2207 | ANHE_at_cache (periodics [HEAP0]); |
2325 | ANHE_at_cache (periodics [HEAP0]); |
2208 | downheap (periodics, periodiccnt, HEAP0); |
2326 | downheap (periodics, periodiccnt, HEAP0); |
2209 | } |
2327 | } |
2210 | else |
2328 | else |
2211 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
2329 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
… | |
… | |
2232 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2350 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
2233 | |
2351 | |
2234 | if (w->reschedule_cb) |
2352 | if (w->reschedule_cb) |
2235 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2353 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2236 | else if (w->interval) |
2354 | else if (w->interval) |
2237 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
2355 | periodic_recalc (EV_A_ w); |
2238 | |
2356 | |
2239 | ANHE_at_cache (periodics [i]); |
2357 | ANHE_at_cache (periodics [i]); |
2240 | } |
2358 | } |
2241 | |
2359 | |
2242 | reheap (periodics, periodiccnt); |
2360 | reheap (periodics, periodiccnt); |
… | |
… | |
2289 | * doesn't hurt either as we only do this on time-jumps or |
2407 | * doesn't hurt either as we only do this on time-jumps or |
2290 | * in the unlikely event of having been preempted here. |
2408 | * in the unlikely event of having been preempted here. |
2291 | */ |
2409 | */ |
2292 | for (i = 4; --i; ) |
2410 | for (i = 4; --i; ) |
2293 | { |
2411 | { |
|
|
2412 | ev_tstamp diff; |
2294 | rtmn_diff = ev_rt_now - mn_now; |
2413 | rtmn_diff = ev_rt_now - mn_now; |
2295 | |
2414 | |
|
|
2415 | diff = odiff - rtmn_diff; |
|
|
2416 | |
2296 | if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
2417 | if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP)) |
2297 | return; /* all is well */ |
2418 | return; /* all is well */ |
2298 | |
2419 | |
2299 | ev_rt_now = ev_time (); |
2420 | ev_rt_now = ev_time (); |
2300 | mn_now = get_clock (); |
2421 | mn_now = get_clock (); |
2301 | now_floor = mn_now; |
2422 | now_floor = mn_now; |
… | |
… | |
2391 | ev_tstamp prev_mn_now = mn_now; |
2512 | ev_tstamp prev_mn_now = mn_now; |
2392 | |
2513 | |
2393 | /* update time to cancel out callback processing overhead */ |
2514 | /* update time to cancel out callback processing overhead */ |
2394 | time_update (EV_A_ 1e100); |
2515 | time_update (EV_A_ 1e100); |
2395 | |
2516 | |
|
|
2517 | /* from now on, we want a pipe-wake-up */ |
|
|
2518 | pipe_write_wanted = 1; |
|
|
2519 | |
2396 | if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) |
2520 | if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped))) |
2397 | { |
2521 | { |
2398 | waittime = MAX_BLOCKTIME; |
2522 | waittime = MAX_BLOCKTIME; |
2399 | |
2523 | |
2400 | if (timercnt) |
2524 | if (timercnt) |
2401 | { |
2525 | { |
2402 | ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
2526 | ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now; |
2403 | if (waittime > to) waittime = to; |
2527 | if (waittime > to) waittime = to; |
2404 | } |
2528 | } |
2405 | |
2529 | |
2406 | #if EV_PERIODIC_ENABLE |
2530 | #if EV_PERIODIC_ENABLE |
2407 | if (periodiccnt) |
2531 | if (periodiccnt) |
2408 | { |
2532 | { |
2409 | ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
2533 | ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now; |
2410 | if (waittime > to) waittime = to; |
2534 | if (waittime > to) waittime = to; |
2411 | } |
2535 | } |
2412 | #endif |
2536 | #endif |
2413 | |
2537 | |
2414 | /* don't let timeouts decrease the waittime below timeout_blocktime */ |
2538 | /* don't let timeouts decrease the waittime below timeout_blocktime */ |
2415 | if (expect_false (waittime < timeout_blocktime)) |
2539 | if (expect_false (waittime < timeout_blocktime)) |
2416 | waittime = timeout_blocktime; |
2540 | waittime = timeout_blocktime; |
|
|
2541 | |
|
|
2542 | /* at this point, we NEED to wait, so we have to ensure */ |
|
|
2543 | /* to pass a minimum nonzero value to the backend */ |
|
|
2544 | if (expect_false (waittime < backend_mintime)) |
|
|
2545 | waittime = backend_mintime; |
2417 | |
2546 | |
2418 | /* extra check because io_blocktime is commonly 0 */ |
2547 | /* extra check because io_blocktime is commonly 0 */ |
2419 | if (expect_false (io_blocktime)) |
2548 | if (expect_false (io_blocktime)) |
2420 | { |
2549 | { |
2421 | sleeptime = io_blocktime - (mn_now - prev_mn_now); |
2550 | sleeptime = io_blocktime - (mn_now - prev_mn_now); |
2422 | |
2551 | |
2423 | if (sleeptime > waittime - backend_fudge) |
2552 | if (sleeptime > waittime - backend_mintime) |
2424 | sleeptime = waittime - backend_fudge; |
2553 | sleeptime = waittime - backend_mintime; |
2425 | |
2554 | |
2426 | if (expect_true (sleeptime > 0.)) |
2555 | if (expect_true (sleeptime > 0.)) |
2427 | { |
2556 | { |
2428 | ev_sleep (sleeptime); |
2557 | ev_sleep (sleeptime); |
2429 | waittime -= sleeptime; |
2558 | waittime -= sleeptime; |
… | |
… | |
2435 | ++loop_count; |
2564 | ++loop_count; |
2436 | #endif |
2565 | #endif |
2437 | assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ |
2566 | assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ |
2438 | backend_poll (EV_A_ waittime); |
2567 | backend_poll (EV_A_ waittime); |
2439 | assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ |
2568 | assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ |
|
|
2569 | |
|
|
2570 | pipe_write_wanted = 0; |
|
|
2571 | |
|
|
2572 | if (pipe_write_skipped) |
|
|
2573 | { |
|
|
2574 | assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w))); |
|
|
2575 | ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM); |
|
|
2576 | } |
|
|
2577 | |
2440 | |
2578 | |
2441 | /* update ev_rt_now, do magic */ |
2579 | /* update ev_rt_now, do magic */ |
2442 | time_update (EV_A_ waittime + sleeptime); |
2580 | time_update (EV_A_ waittime + sleeptime); |
2443 | } |
2581 | } |
2444 | |
2582 | |
… | |
… | |
2734 | if (w->reschedule_cb) |
2872 | if (w->reschedule_cb) |
2735 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2873 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
2736 | else if (w->interval) |
2874 | else if (w->interval) |
2737 | { |
2875 | { |
2738 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2876 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
2739 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
2877 | periodic_recalc (EV_A_ w); |
2740 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2741 | } |
2878 | } |
2742 | else |
2879 | else |
2743 | ev_at (w) = w->offset; |
2880 | ev_at (w) = w->offset; |
2744 | |
2881 | |
2745 | EV_FREQUENT_CHECK; |
2882 | EV_FREQUENT_CHECK; |
… | |
… | |
2866 | sa.sa_handler = ev_sighandler; |
3003 | sa.sa_handler = ev_sighandler; |
2867 | sigfillset (&sa.sa_mask); |
3004 | sigfillset (&sa.sa_mask); |
2868 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
3005 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2869 | sigaction (w->signum, &sa, 0); |
3006 | sigaction (w->signum, &sa, 0); |
2870 | |
3007 | |
|
|
3008 | if (origflags & EVFLAG_NOSIGMASK) |
|
|
3009 | { |
2871 | sigemptyset (&sa.sa_mask); |
3010 | sigemptyset (&sa.sa_mask); |
2872 | sigaddset (&sa.sa_mask, w->signum); |
3011 | sigaddset (&sa.sa_mask, w->signum); |
2873 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
3012 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
|
|
3013 | } |
2874 | #endif |
3014 | #endif |
2875 | } |
3015 | } |
2876 | |
3016 | |
2877 | EV_FREQUENT_CHECK; |
3017 | EV_FREQUENT_CHECK; |
2878 | } |
3018 | } |
… | |
… | |
3019 | if (!pend || pend == path) |
3159 | if (!pend || pend == path) |
3020 | break; |
3160 | break; |
3021 | |
3161 | |
3022 | *pend = 0; |
3162 | *pend = 0; |
3023 | w->wd = inotify_add_watch (fs_fd, path, mask); |
3163 | w->wd = inotify_add_watch (fs_fd, path, mask); |
3024 | } |
3164 | } |
3025 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
3165 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
3026 | } |
3166 | } |
3027 | } |
3167 | } |
3028 | |
3168 | |
3029 | if (w->wd >= 0) |
3169 | if (w->wd >= 0) |
… | |
… | |
3583 | |
3723 | |
3584 | ev_start (EV_A_ (W)w, ++cleanupcnt); |
3724 | ev_start (EV_A_ (W)w, ++cleanupcnt); |
3585 | array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
3725 | array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
3586 | cleanups [cleanupcnt - 1] = w; |
3726 | cleanups [cleanupcnt - 1] = w; |
3587 | |
3727 | |
|
|
3728 | /* cleanup watchers should never keep a refcount on the loop */ |
|
|
3729 | ev_unref (EV_A); |
3588 | EV_FREQUENT_CHECK; |
3730 | EV_FREQUENT_CHECK; |
3589 | } |
3731 | } |
3590 | |
3732 | |
3591 | void |
3733 | void |
3592 | ev_cleanup_stop (EV_P_ ev_cleanup *w) |
3734 | ev_cleanup_stop (EV_P_ ev_cleanup *w) |
… | |
… | |
3594 | clear_pending (EV_A_ (W)w); |
3736 | clear_pending (EV_A_ (W)w); |
3595 | if (expect_false (!ev_is_active (w))) |
3737 | if (expect_false (!ev_is_active (w))) |
3596 | return; |
3738 | return; |
3597 | |
3739 | |
3598 | EV_FREQUENT_CHECK; |
3740 | EV_FREQUENT_CHECK; |
|
|
3741 | ev_ref (EV_A); |
3599 | |
3742 | |
3600 | { |
3743 | { |
3601 | int active = ev_active (w); |
3744 | int active = ev_active (w); |
3602 | |
3745 | |
3603 | cleanups [active - 1] = cleanups [--cleanupcnt]; |
3746 | cleanups [active - 1] = cleanups [--cleanupcnt]; |