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Comparing libev/ev.c (file contents):
Revision 1.265 by root, Thu Oct 23 04:56:49 2008 UTC vs.
Revision 1.273 by root, Mon Nov 3 14:27:06 2008 UTC

… …
287# endif 287# endif
288#endif 288#endif
289 289
290#if EV_USE_INOTIFY 290#if EV_USE_INOTIFY
291# include <sys/utsname.h> 291# include <sys/utsname.h>
292# include <sys/statfs.h>
292# include <sys/inotify.h> 293# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 294/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW 295# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY 296# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0 297# define EV_USE_INOTIFY 0
… …
388{ 389{
389 syserr_cb = cb; 390 syserr_cb = cb;
390} 391}
391 392
392static void noinline 393static void noinline
393syserr (const char *msg) 394ev_syserr (const char *msg)
394{ 395{
395 if (!msg) 396 if (!msg)
396 msg = "(libev) system error"; 397 msg = "(libev) system error";
397 398
398 if (syserr_cb) 399 if (syserr_cb)
… …
450{ 451{
451 WL head; 452 WL head;
452 unsigned char events; 453 unsigned char events;
453 unsigned char reify; 454 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 455 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char unused; /* currently unused padding */ 456 unsigned char unused;
457#if EV_USE_EPOLL
458 unsigned int egen; /* generation counter to counter epoll bugs */
459#endif
456#if EV_SELECT_IS_WINSOCKET 460#if EV_SELECT_IS_WINSOCKET
457 SOCKET handle; 461 SOCKET handle;
458#endif 462#endif
459} ANFD; 463} ANFD;
460 464
… …
806 810
807 for (fd = 0; fd < anfdmax; ++fd) 811 for (fd = 0; fd < anfdmax; ++fd)
808 if (anfds [fd].events) 812 if (anfds [fd].events)
809 { 813 {
810 anfds [fd].events = 0; 814 anfds [fd].events = 0;
815 anfds [fd].emask = 0;
811 fd_change (EV_A_ fd, EV_IOFDSET | 1); 816 fd_change (EV_A_ fd, EV_IOFDSET | 1);
812 } 817 }
813} 818}
814 819
815/*****************************************************************************/ 820/*****************************************************************************/
… …
997 } 1002 }
998 else 1003 else
999#endif 1004#endif
1000 { 1005 {
1001 while (pipe (evpipe)) 1006 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe"); 1007 ev_syserr ("(libev) error creating signal/async pipe");
1003 1008
1004 fd_intern (evpipe [0]); 1009 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]); 1010 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ); 1011 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 } 1012 }
… …
1638{ 1643{
1639#if EV_MULTIPLICITY 1644#if EV_MULTIPLICITY
1640 struct ev_loop *loop = ev_default_loop_ptr; 1645 struct ev_loop *loop = ev_default_loop_ptr;
1641#endif 1646#endif
1642 1647
1648 ev_default_loop_ptr = 0;
1649
1643#ifndef _WIN32 1650#ifndef _WIN32
1644 ev_ref (EV_A); /* child watcher */ 1651 ev_ref (EV_A); /* child watcher */
1645 ev_signal_stop (EV_A_ &childev); 1652 ev_signal_stop (EV_A_ &childev);
1646#endif 1653#endif
1647 1654
… …
1653{ 1660{
1654#if EV_MULTIPLICITY 1661#if EV_MULTIPLICITY
1655 struct ev_loop *loop = ev_default_loop_ptr; 1662 struct ev_loop *loop = ev_default_loop_ptr;
1656#endif 1663#endif
1657 1664
1658 if (backend)
1659 postfork = 1; /* must be in line with ev_loop_fork */ 1665 postfork = 1; /* must be in line with ev_loop_fork */
1660} 1666}
1661 1667
1662/*****************************************************************************/ 1668/*****************************************************************************/
1663 1669
1664void 1670void
… …
2409# ifdef _WIN32 2415# ifdef _WIN32
2410# undef lstat 2416# undef lstat
2411# define lstat(a,b) _stati64 (a,b) 2417# define lstat(a,b) _stati64 (a,b)
2412# endif 2418# endif
2413 2419
2414#define DEF_STAT_INTERVAL 5.0074891 2420#define DEF_STAT_INTERVAL 5.0074891
2421#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2415#define MIN_STAT_INTERVAL 0.1074891 2422#define MIN_STAT_INTERVAL 0.1074891
2416 2423
2417static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2424static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2418 2425
2419#if EV_USE_INOTIFY 2426#if EV_USE_INOTIFY
2420# define EV_INOTIFY_BUFSIZE 8192 2427# define EV_INOTIFY_BUFSIZE 8192
… …
2424{ 2431{
2425 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); 2432 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);
2426 2433
2427 if (w->wd < 0) 2434 if (w->wd < 0)
2428 { 2435 {
2436 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2429 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2437 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2430 2438
2431 /* monitor some parent directory for speedup hints */ 2439 /* monitor some parent directory for speedup hints */
2432 /* note that exceeding the hardcoded limit is not a correctness issue, */ 2440 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2433 /* but an efficiency issue only */ 2441 /* but an efficiency issue only */
2434 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2442 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2435 { 2443 {
2436 char path [4096]; 2444 char path [4096];
2437 strcpy (path, w->path); 2445 strcpy (path, w->path);
… …
2451 } 2459 }
2452 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2460 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2453 } 2461 }
2454 } 2462 }
2455 else 2463 else
2456 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */ 2464 {
2457
2458 if (w->wd >= 0)
2459 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2465 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2466
2467 /* now local changes will be tracked by inotify, but remote changes won't */
2468 /* unless the filesystem it known to be local, we therefore still poll */
2469 /* also do poll on <2.6.25, but with normal frequency */
2470 struct statfs sfs;
2471
2472 if (fs_2625 && !statfs (w->path, &sfs))
2473 if (sfs.f_type == 0x1373 /* devfs */
2474 || sfs.f_type == 0xEF53 /* ext2/3 */
2475 || sfs.f_type == 0x3153464a /* jfs */
2476 || sfs.f_type == 0x52654973 /* reiser3 */
2477 || sfs.f_type == 0x01021994 /* tempfs */
2478 || sfs.f_type == 0x58465342 /* xfs */)
2479 return;
2480
2481 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2482 ev_timer_again (EV_A_ &w->timer);
2483 }
2460} 2484}
2461 2485
2462static void noinline 2486static void noinline
2463infy_del (EV_P_ ev_stat *w) 2487infy_del (EV_P_ ev_stat *w)
2464{ 2488{
… …
2517 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2541 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2518 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2542 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2519} 2543}
2520 2544
2521void inline_size 2545void inline_size
2522infy_init (EV_P) 2546check_2625 (EV_P)
2523{ 2547{
2524 if (fs_fd != -2)
2525 return;
2526
2527 /* kernels < 2.6.25 are borked 2548 /* kernels < 2.6.25 are borked
2528 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 2549 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2529 */ 2550 */
2530 {
2531 struct utsname buf; 2551 struct utsname buf;
2532 int major, minor, micro; 2552 int major, minor, micro;
2533 2553
2534 fs_fd = -1;
2535
2536 if (uname (&buf)) 2554 if (uname (&buf))
2537 return; 2555 return;
2538 2556
2539 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3) 2557 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2540 return; 2558 return;
2541 2559
2542 if (major < 2 2560 if (major < 2
2543 || (major == 2 && minor < 6) 2561 || (major == 2 && minor < 6)
2544 || (major == 2 && minor == 6 && micro < 25)) 2562 || (major == 2 && minor == 6 && micro < 25))
2545 return; 2563 return;
2546 } 2564
2565 fs_2625 = 1;
2566}
2567
2568void inline_size
2569infy_init (EV_P)
2570{
2571 if (fs_fd != -2)
2572 return;
2573
2574 fs_fd = -1;
2575
2576 check_2625 (EV_A);
2547 2577
2548 fs_fd = inotify_init (); 2578 fs_fd = inotify_init ();
2549 2579
2550 if (fs_fd >= 0) 2580 if (fs_fd >= 0)
2551 { 2581 {
… …
2579 w->wd = -1; 2609 w->wd = -1;
2580 2610
2581 if (fs_fd >= 0) 2611 if (fs_fd >= 0)
2582 infy_add (EV_A_ w); /* re-add, no matter what */ 2612 infy_add (EV_A_ w); /* re-add, no matter what */
2583 else 2613 else
2584 ev_timer_start (EV_A_ &w->timer); 2614 ev_timer_again (EV_A_ &w->timer);
2585 } 2615 }
2586 } 2616 }
2587} 2617}
2588 2618
2589#endif 2619#endif
… …
2644ev_stat_start (EV_P_ ev_stat *w) 2674ev_stat_start (EV_P_ ev_stat *w)
2645{ 2675{
2646 if (expect_false (ev_is_active (w))) 2676 if (expect_false (ev_is_active (w)))
2647 return; 2677 return;
2648 2678
2649 /* since we use memcmp, we need to clear any padding data etc. */
2650 memset (&w->prev, 0, sizeof (ev_statdata));
2651 memset (&w->attr, 0, sizeof (ev_statdata));
2652
2653 ev_stat_stat (EV_A_ w); 2679 ev_stat_stat (EV_A_ w);
2654 2680
2681 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2655 if (w->interval < MIN_STAT_INTERVAL) 2682 w->interval = MIN_STAT_INTERVAL;
2656 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2657 2683
2658 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2684 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2659 ev_set_priority (&w->timer, ev_priority (w)); 2685 ev_set_priority (&w->timer, ev_priority (w));
2660 2686
2661#if EV_USE_INOTIFY 2687#if EV_USE_INOTIFY
2662 infy_init (EV_A); 2688 infy_init (EV_A);
2663 2689
2664 if (fs_fd >= 0) 2690 if (fs_fd >= 0)
2665 infy_add (EV_A_ w); 2691 infy_add (EV_A_ w);
2666 else 2692 else
2667#endif 2693#endif
2668 ev_timer_start (EV_A_ &w->timer); 2694 ev_timer_again (EV_A_ &w->timer);
2669 2695
2670 ev_start (EV_A_ (W)w, 1); 2696 ev_start (EV_A_ (W)w, 1);
2671 2697
2672 EV_FREQUENT_CHECK; 2698 EV_FREQUENT_CHECK;
2673} 2699}

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