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Comparing libev/ev.c (file contents):
Revision 1.313 by root, Wed Aug 19 23:44:51 2009 UTC vs.
Revision 1.318 by root, Tue Nov 17 00:22:28 2009 UTC

… …
302# define EV_USE_EVENTFD 0 302# define EV_USE_EVENTFD 0
303# endif 303# endif
304#endif 304#endif
305 305
306#ifndef EV_USE_SIGNALFD 306#ifndef EV_USE_SIGNALFD
307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9)) 307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
308# define EV_USE_SIGNALFD 1 308# define EV_USE_SIGNALFD 1
309# else 309# else
310# define EV_USE_SIGNALFD 0 310# define EV_USE_SIGNALFD 0
311# endif 311# endif
312#endif 312#endif
… …
402} 402}
403# endif 403# endif
404#endif 404#endif
405 405
406#if EV_USE_SIGNALFD 406#if EV_USE_SIGNALFD
407# include <sys/signalfd.h> 407/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
408# include <stdint.h>
409# ifndef SFD_NONBLOCK
410# define SFD_NONBLOCK O_NONBLOCK
408#endif 411# endif
412# ifndef SFD_CLOEXEC
413# ifdef O_CLOEXEC
414# define SFD_CLOEXEC O_CLOEXEC
415# else
416# define SFD_CLOEXEC 02000000
417# endif
418# endif
419# ifdef __cplusplus
420extern "C" {
421# endif
422int signalfd (int fd, const sigset_t *mask, int flags);
423
424struct signalfd_siginfo
425{
426 uint32_t ssi_signo;
427 char pad[128 - sizeof (uint32_t)];
428};
429# ifdef __cplusplus
430}
431# endif
432#endif
433
409 434
410/**/ 435/**/
411 436
412#if EV_VERIFY >= 3 437#if EV_VERIFY >= 3
413# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 438# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
… …
425 */ 450 */
426#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 451#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
427 452
428#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 453#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) */ 454#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 */
431 455
432#if __GNUC__ >= 4 456#if __GNUC__ >= 4
433# define expect(expr,value) __builtin_expect ((expr),(value)) 457# define expect(expr,value) __builtin_expect ((expr),(value))
434# define noinline __attribute__ ((noinline)) 458# define noinline __attribute__ ((noinline))
435#else 459#else
… …
1634 } 1658 }
1635 } 1659 }
1636 1660
1637#if EV_USE_SIGNALFD 1661#if EV_USE_SIGNALFD
1638 if (ev_is_active (&sigfd_w)) 1662 if (ev_is_active (&sigfd_w))
1639 {
1640 /*ev_ref (EV_A);*/
1641 /*ev_io_stop (EV_A_ &sigfd_w);*/
1642
1643 close (sigfd); 1663 close (sigfd);
1644 }
1645#endif 1664#endif
1646 1665
1647#if EV_USE_INOTIFY 1666#if EV_USE_INOTIFY
1648 if (fs_fd >= 0) 1667 if (fs_fd >= 0)
1649 close (fs_fd); 1668 close (fs_fd);
… …
2728# if EV_USE_SIGNALFD 2747# if EV_USE_SIGNALFD
2729 if (sigfd < 0) /*TODO*/ 2748 if (sigfd < 0) /*TODO*/
2730# endif 2749# endif
2731 { 2750 {
2732# if _WIN32 2751# if _WIN32
2752 evpipe_init (EV_A);
2753
2733 signal (w->signum, ev_sighandler); 2754 signal (w->signum, ev_sighandler);
2734# else 2755# else
2735 struct sigaction sa; 2756 struct sigaction sa;
2736 2757
2737 evpipe_init (EV_A); 2758 evpipe_init (EV_A);
… …
2835static void noinline 2856static void noinline
2836infy_add (EV_P_ ev_stat *w) 2857infy_add (EV_P_ ev_stat *w)
2837{ 2858{
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); 2859 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 2860
2840 if (w->wd < 0) 2861 if (w->wd >= 0)
2862 {
2863 struct statfs sfs;
2864
2865 /* now local changes will be tracked by inotify, but remote changes won't */
2866 /* unless the filesystem is known to be local, we therefore still poll */
2867 /* also do poll on <2.6.25, but with normal frequency */
2868
2869 if (!fs_2625)
2870 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2871 else if (!statfs (w->path, &sfs)
2872 && (sfs.f_type == 0x1373 /* devfs */
2873 || sfs.f_type == 0xEF53 /* ext2/3 */
2874 || sfs.f_type == 0x3153464a /* jfs */
2875 || sfs.f_type == 0x52654973 /* reiser3 */
2876 || sfs.f_type == 0x01021994 /* tempfs */
2877 || sfs.f_type == 0x58465342 /* xfs */))
2878 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2879 else
2880 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2841 { 2881 }
2882 else
2883 {
2884 /* can't use inotify, continue to stat */
2842 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 2885 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 2886
2845 /* monitor some parent directory for speedup hints */ 2887 /* 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, */ 2888 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2847 /* but an efficiency issue only */ 2889 /* but an efficiency issue only */
2848 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2890 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2849 { 2891 {
2850 char path [4096]; 2892 char path [4096];
… …
2866 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2908 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2867 } 2909 }
2868 } 2910 }
2869 2911
2870 if (w->wd >= 0) 2912 if (w->wd >= 0)
2871 {
2872 struct statfs sfs;
2873
2874 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2913 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2875 2914
2876 /* now local changes will be tracked by inotify, but remote changes won't */ 2915 /* now re-arm timer, if required */
2877 /* unless the filesystem it known to be local, we therefore still poll */ 2916 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); 2917 ev_timer_again (EV_A_ &w->timer);
2891 } 2918 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2892} 2919}
2893 2920
2894static void noinline 2921static void noinline
2895infy_del (EV_P_ ev_stat *w) 2922infy_del (EV_P_ ev_stat *w)
2896{ 2923{
… …
2972 return; 2999 return;
2973 3000
2974 fs_2625 = 1; 3001 fs_2625 = 1;
2975} 3002}
2976 3003
3004inline_size int
3005infy_newfd (void)
3006{
3007#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3008 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3009 if (fd >= 0)
3010 return fd;
3011#endif
3012 return inotify_init ();
3013}
3014
2977inline_size void 3015inline_size void
2978infy_init (EV_P) 3016infy_init (EV_P)
2979{ 3017{
2980 if (fs_fd != -2) 3018 if (fs_fd != -2)
2981 return; 3019 return;
2982 3020
2983 fs_fd = -1; 3021 fs_fd = -1;
2984 3022
2985 check_2625 (EV_A); 3023 check_2625 (EV_A);
2986 3024
2987 fs_fd = inotify_init (); 3025 fs_fd = infy_newfd ();
2988 3026
2989 if (fs_fd >= 0) 3027 if (fs_fd >= 0)
2990 { 3028 {
3029 fd_intern (fs_fd);
2991 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3030 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2992 ev_set_priority (&fs_w, EV_MAXPRI); 3031 ev_set_priority (&fs_w, EV_MAXPRI);
2993 ev_io_start (EV_A_ &fs_w); 3032 ev_io_start (EV_A_ &fs_w);
3033 ev_unref (EV_A);
2994 } 3034 }
2995} 3035}
2996 3036
2997inline_size void 3037inline_size void
2998infy_fork (EV_P) 3038infy_fork (EV_P)
… …
3000 int slot; 3040 int slot;
3001 3041
3002 if (fs_fd < 0) 3042 if (fs_fd < 0)
3003 return; 3043 return;
3004 3044
3045 ev_ref (EV_A);
3046 ev_io_stop (EV_A_ &fs_w);
3005 close (fs_fd); 3047 close (fs_fd);
3006 fs_fd = inotify_init (); 3048 fs_fd = infy_newfd ();
3049
3050 if (fs_fd >= 0)
3051 {
3052 fd_intern (fs_fd);
3053 ev_io_set (&fs_w, fs_fd, EV_READ);
3054 ev_io_start (EV_A_ &fs_w);
3055 ev_unref (EV_A);
3056 }
3007 3057
3008 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3058 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3009 { 3059 {
3010 WL w_ = fs_hash [slot].head; 3060 WL w_ = fs_hash [slot].head;
3011 fs_hash [slot].head = 0; 3061 fs_hash [slot].head = 0;
… …
3018 w->wd = -1; 3068 w->wd = -1;
3019 3069
3020 if (fs_fd >= 0) 3070 if (fs_fd >= 0)
3021 infy_add (EV_A_ w); /* re-add, no matter what */ 3071 infy_add (EV_A_ w); /* re-add, no matter what */
3022 else 3072 else
3073 {
3074 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3075 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3023 ev_timer_again (EV_A_ &w->timer); 3076 ev_timer_again (EV_A_ &w->timer);
3077 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3078 }
3024 } 3079 }
3025 } 3080 }
3026} 3081}
3027 3082
3028#endif 3083#endif
… …
3098 3153
3099 if (fs_fd >= 0) 3154 if (fs_fd >= 0)
3100 infy_add (EV_A_ w); 3155 infy_add (EV_A_ w);
3101 else 3156 else
3102#endif 3157#endif
3158 {
3103 ev_timer_again (EV_A_ &w->timer); 3159 ev_timer_again (EV_A_ &w->timer);
3160 ev_unref (EV_A);
3161 }
3104 3162
3105 ev_start (EV_A_ (W)w, 1); 3163 ev_start (EV_A_ (W)w, 1);
3106 3164
3107 EV_FREQUENT_CHECK; 3165 EV_FREQUENT_CHECK;
3108} 3166}
… …
3117 EV_FREQUENT_CHECK; 3175 EV_FREQUENT_CHECK;
3118 3176
3119#if EV_USE_INOTIFY 3177#if EV_USE_INOTIFY
3120 infy_del (EV_A_ w); 3178 infy_del (EV_A_ w);
3121#endif 3179#endif
3180
3181 if (ev_is_active (&w->timer))
3182 {
3183 ev_ref (EV_A);
3122 ev_timer_stop (EV_A_ &w->timer); 3184 ev_timer_stop (EV_A_ &w->timer);
3185 }
3123 3186
3124 ev_stop (EV_A_ (W)w); 3187 ev_stop (EV_A_ (W)w);
3125 3188
3126 EV_FREQUENT_CHECK; 3189 EV_FREQUENT_CHECK;
3127} 3190}

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