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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 1.320 by root, Fri Dec 4 20:25:06 2009 UTC

… …
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
… …
302# define EV_USE_EVENTFD 0 303# define EV_USE_EVENTFD 0
303# endif 304# endif
304#endif 305#endif
305 306
306#ifndef EV_USE_SIGNALFD 307#ifndef EV_USE_SIGNALFD
307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9)) 308# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
308# define EV_USE_SIGNALFD 1 309# define EV_USE_SIGNALFD 1
309# else 310# else
310# define EV_USE_SIGNALFD 0 311# define EV_USE_SIGNALFD 0
311# endif 312# endif
312#endif 313#endif
… …
402} 403}
403# endif 404# endif
404#endif 405#endif
405 406
406#if EV_USE_SIGNALFD 407#if EV_USE_SIGNALFD
407# include <sys/signalfd.h> 408/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
409# include <stdint.h>
410# ifndef SFD_NONBLOCK
411# define SFD_NONBLOCK O_NONBLOCK
408#endif 412# endif
413# ifndef SFD_CLOEXEC
414# ifdef O_CLOEXEC
415# define SFD_CLOEXEC O_CLOEXEC
416# else
417# define SFD_CLOEXEC 02000000
418# endif
419# endif
420# ifdef __cplusplus
421extern "C" {
422# endif
423int signalfd (int fd, const sigset_t *mask, int flags);
424
425struct signalfd_siginfo
426{
427 uint32_t ssi_signo;
428 char pad[128 - sizeof (uint32_t)];
429};
430# ifdef __cplusplus
431}
432# endif
433#endif
434
409 435
410/**/ 436/**/
411 437
412#if EV_VERIFY >= 3 438#if EV_VERIFY >= 3
413# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 439# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
… …
425 */ 451 */
426#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 452#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
427 453
428#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 454#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) */ 455#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 */
431 456
432#if __GNUC__ >= 4 457#if __GNUC__ >= 4
433# define expect(expr,value) __builtin_expect ((expr),(value)) 458# define expect(expr,value) __builtin_expect ((expr),(value))
434# define noinline __attribute__ ((noinline)) 459# define noinline __attribute__ ((noinline))
435#else 460#else
… …
1634 } 1659 }
1635 } 1660 }
1636 1661
1637#if EV_USE_SIGNALFD 1662#if EV_USE_SIGNALFD
1638 if (ev_is_active (&sigfd_w)) 1663 if (ev_is_active (&sigfd_w))
1639 {
1640 /*ev_ref (EV_A);*/
1641 /*ev_io_stop (EV_A_ &sigfd_w);*/
1642
1643 close (sigfd); 1664 close (sigfd);
1644 }
1645#endif 1665#endif
1646 1666
1647#if EV_USE_INOTIFY 1667#if EV_USE_INOTIFY
1648 if (fs_fd >= 0) 1668 if (fs_fd >= 0)
1649 close (fs_fd); 1669 close (fs_fd);
… …
2728# if EV_USE_SIGNALFD 2748# if EV_USE_SIGNALFD
2729 if (sigfd < 0) /*TODO*/ 2749 if (sigfd < 0) /*TODO*/
2730# endif 2750# endif
2731 { 2751 {
2732# if _WIN32 2752# if _WIN32
2753 evpipe_init (EV_A);
2754
2733 signal (w->signum, ev_sighandler); 2755 signal (w->signum, ev_sighandler);
2734# else 2756# else
2735 struct sigaction sa; 2757 struct sigaction sa;
2736 2758
2737 evpipe_init (EV_A); 2759 evpipe_init (EV_A);
… …
2835static void noinline 2857static void noinline
2836infy_add (EV_P_ ev_stat *w) 2858infy_add (EV_P_ ev_stat *w)
2837{ 2859{
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); 2860 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 2861
2840 if (w->wd < 0) 2862 if (w->wd >= 0)
2863 {
2864 struct statfs sfs;
2865
2866 /* now local changes will be tracked by inotify, but remote changes won't */
2867 /* unless the filesystem is known to be local, we therefore still poll */
2868 /* also do poll on <2.6.25, but with normal frequency */
2869
2870 if (!fs_2625)
2871 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2872 else if (!statfs (w->path, &sfs)
2873 && (sfs.f_type == 0x1373 /* devfs */
2874 || sfs.f_type == 0xEF53 /* ext2/3 */
2875 || sfs.f_type == 0x3153464a /* jfs */
2876 || sfs.f_type == 0x52654973 /* reiser3 */
2877 || sfs.f_type == 0x01021994 /* tempfs */
2878 || sfs.f_type == 0x58465342 /* xfs */))
2879 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2880 else
2881 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2841 { 2882 }
2883 else
2884 {
2885 /* can't use inotify, continue to stat */
2842 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 2886 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 2887
2845 /* monitor some parent directory for speedup hints */ 2888 /* 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, */ 2889 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2847 /* but an efficiency issue only */ 2890 /* but an efficiency issue only */
2848 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2891 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2849 { 2892 {
2850 char path [4096]; 2893 char path [4096];
… …
2866 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2909 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2867 } 2910 }
2868 } 2911 }
2869 2912
2870 if (w->wd >= 0) 2913 if (w->wd >= 0)
2871 {
2872 struct statfs sfs;
2873
2874 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2914 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2875 2915
2876 /* now local changes will be tracked by inotify, but remote changes won't */ 2916 /* now re-arm timer, if required */
2877 /* unless the filesystem it known to be local, we therefore still poll */ 2917 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); 2918 ev_timer_again (EV_A_ &w->timer);
2891 } 2919 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2892} 2920}
2893 2921
2894static void noinline 2922static void noinline
2895infy_del (EV_P_ ev_stat *w) 2923infy_del (EV_P_ ev_stat *w)
2896{ 2924{
… …
2972 return; 3000 return;
2973 3001
2974 fs_2625 = 1; 3002 fs_2625 = 1;
2975} 3003}
2976 3004
3005inline_size int
3006infy_newfd (void)
3007{
3008#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3009 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3010 if (fd >= 0)
3011 return fd;
3012#endif
3013 return inotify_init ();
3014}
3015
2977inline_size void 3016inline_size void
2978infy_init (EV_P) 3017infy_init (EV_P)
2979{ 3018{
2980 if (fs_fd != -2) 3019 if (fs_fd != -2)
2981 return; 3020 return;
2982 3021
2983 fs_fd = -1; 3022 fs_fd = -1;
2984 3023
2985 check_2625 (EV_A); 3024 check_2625 (EV_A);
2986 3025
2987 fs_fd = inotify_init (); 3026 fs_fd = infy_newfd ();
2988 3027
2989 if (fs_fd >= 0) 3028 if (fs_fd >= 0)
2990 { 3029 {
3030 fd_intern (fs_fd);
2991 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3031 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2992 ev_set_priority (&fs_w, EV_MAXPRI); 3032 ev_set_priority (&fs_w, EV_MAXPRI);
2993 ev_io_start (EV_A_ &fs_w); 3033 ev_io_start (EV_A_ &fs_w);
3034 ev_unref (EV_A);
2994 } 3035 }
2995} 3036}
2996 3037
2997inline_size void 3038inline_size void
2998infy_fork (EV_P) 3039infy_fork (EV_P)
… …
3000 int slot; 3041 int slot;
3001 3042
3002 if (fs_fd < 0) 3043 if (fs_fd < 0)
3003 return; 3044 return;
3004 3045
3046 ev_ref (EV_A);
3047 ev_io_stop (EV_A_ &fs_w);
3005 close (fs_fd); 3048 close (fs_fd);
3006 fs_fd = inotify_init (); 3049 fs_fd = infy_newfd ();
3050
3051 if (fs_fd >= 0)
3052 {
3053 fd_intern (fs_fd);
3054 ev_io_set (&fs_w, fs_fd, EV_READ);
3055 ev_io_start (EV_A_ &fs_w);
3056 ev_unref (EV_A);
3057 }
3007 3058
3008 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3059 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3009 { 3060 {
3010 WL w_ = fs_hash [slot].head; 3061 WL w_ = fs_hash [slot].head;
3011 fs_hash [slot].head = 0; 3062 fs_hash [slot].head = 0;
… …
3018 w->wd = -1; 3069 w->wd = -1;
3019 3070
3020 if (fs_fd >= 0) 3071 if (fs_fd >= 0)
3021 infy_add (EV_A_ w); /* re-add, no matter what */ 3072 infy_add (EV_A_ w); /* re-add, no matter what */
3022 else 3073 else
3074 {
3075 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3076 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3023 ev_timer_again (EV_A_ &w->timer); 3077 ev_timer_again (EV_A_ &w->timer);
3078 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3079 }
3024 } 3080 }
3025 } 3081 }
3026} 3082}
3027 3083
3028#endif 3084#endif
… …
3045static void noinline 3101static void noinline
3046stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3102stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3047{ 3103{
3048 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3104 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3049 3105
3050 /* we copy this here each the time so that */ 3106 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); 3107 ev_stat_stat (EV_A_ w);
3054 3108
3055 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3109 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3056 if ( 3110 if (
3057 w->prev.st_dev != w->attr.st_dev 3111 prev.st_dev != w->attr.st_dev
3058 || w->prev.st_ino != w->attr.st_ino 3112 || prev.st_ino != w->attr.st_ino
3059 || w->prev.st_mode != w->attr.st_mode 3113 || prev.st_mode != w->attr.st_mode
3060 || w->prev.st_nlink != w->attr.st_nlink 3114 || prev.st_nlink != w->attr.st_nlink
3061 || w->prev.st_uid != w->attr.st_uid 3115 || prev.st_uid != w->attr.st_uid
3062 || w->prev.st_gid != w->attr.st_gid 3116 || prev.st_gid != w->attr.st_gid
3063 || w->prev.st_rdev != w->attr.st_rdev 3117 || prev.st_rdev != w->attr.st_rdev
3064 || w->prev.st_size != w->attr.st_size 3118 || prev.st_size != w->attr.st_size
3065 || w->prev.st_atime != w->attr.st_atime 3119 || prev.st_atime != w->attr.st_atime
3066 || w->prev.st_mtime != w->attr.st_mtime 3120 || prev.st_mtime != w->attr.st_mtime
3067 || w->prev.st_ctime != w->attr.st_ctime 3121 || prev.st_ctime != w->attr.st_ctime
3068 ) { 3122 ) {
3123 /* we only update w->prev on actual differences */
3124 /* in case we test more often than invoke the callback, */
3125 /* to ensure that prev is always different to attr */
3126 w->prev = prev;
3127
3069 #if EV_USE_INOTIFY 3128 #if EV_USE_INOTIFY
3070 if (fs_fd >= 0) 3129 if (fs_fd >= 0)
3071 { 3130 {
3072 infy_del (EV_A_ w); 3131 infy_del (EV_A_ w);
3073 infy_add (EV_A_ w); 3132 infy_add (EV_A_ w);
… …
3098 3157
3099 if (fs_fd >= 0) 3158 if (fs_fd >= 0)
3100 infy_add (EV_A_ w); 3159 infy_add (EV_A_ w);
3101 else 3160 else
3102#endif 3161#endif
3162 {
3103 ev_timer_again (EV_A_ &w->timer); 3163 ev_timer_again (EV_A_ &w->timer);
3164 ev_unref (EV_A);
3165 }
3104 3166
3105 ev_start (EV_A_ (W)w, 1); 3167 ev_start (EV_A_ (W)w, 1);
3106 3168
3107 EV_FREQUENT_CHECK; 3169 EV_FREQUENT_CHECK;
3108} 3170}
… …
3117 EV_FREQUENT_CHECK; 3179 EV_FREQUENT_CHECK;
3118 3180
3119#if EV_USE_INOTIFY 3181#if EV_USE_INOTIFY
3120 infy_del (EV_A_ w); 3182 infy_del (EV_A_ w);
3121#endif 3183#endif
3184
3185 if (ev_is_active (&w->timer))
3186 {
3187 ev_ref (EV_A);
3122 ev_timer_stop (EV_A_ &w->timer); 3188 ev_timer_stop (EV_A_ &w->timer);
3189 }
3123 3190
3124 ev_stop (EV_A_ (W)w); 3191 ev_stop (EV_A_ (W)w);
3125 3192
3126 EV_FREQUENT_CHECK; 3193 EV_FREQUENT_CHECK;
3127} 3194}

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