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ev_stat_bug2

This commit is contained in:
Marc Alexander Lehmann 2009-11-17 00:22:28 +00:00
parent ec9d1fed9d
commit 5991f26a64
2 changed files with 48 additions and 29 deletions
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4
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@ -3,8 +3,8 @@ Revision history for libev, a high-performance and full-featured event loop.
TODO: somehow unblock procmask?
- backport inotify code to C89.
- inotify file descriptors could leak into child processes.
- inotify usage would keep an errornous extra ref on the loop,
preventing exit when unregistering all watchers (testcase
- ev_stat watchers could keep an errornous extra ref on the loop,
preventing exit when unregistering all watchers (testcases
provided by ry@tinyclouds.org).
- implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
symbols to make it easier for apps to do their own fd management.

73
ev.c
View File

@ -2858,12 +2858,33 @@ infy_add (EV_P_ ev_stat *w)
{
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);
if (w->wd < 0)
if (w->wd >= 0)
{
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
struct statfs sfs;
/* monitor some parent directory for speedup hints */
/* now local changes will be tracked by inotify, but remote changes won't */
/* unless the filesystem is known to be local, we therefore still poll */
/* also do poll on <2.6.25, but with normal frequency */
if (!fs_2625)
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
else if (!statfs (w->path, &sfs)
&& (sfs.f_type == 0x1373 /* devfs */
|| sfs.f_type == 0xEF53 /* ext2/3 */
|| sfs.f_type == 0x3153464a /* jfs */
|| sfs.f_type == 0x52654973 /* reiser3 */
|| sfs.f_type == 0x01021994 /* tempfs */
|| sfs.f_type == 0x58465342 /* xfs */))
w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
else
w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
}
else
{
/* can't use inotify, continue to stat */
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
/* if path is not there, monitor some parent directory for speedup hints */
/* note that exceeding the hardcoded path limit is not a correctness issue, */
/* but an efficiency issue only */
if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
@ -2889,27 +2910,12 @@ infy_add (EV_P_ ev_stat *w)
}
if (w->wd >= 0)
{
struct statfs sfs;
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
/* now local changes will be tracked by inotify, but remote changes won't */
/* unless the filesystem is known to be local, we therefore still poll */
/* also do poll on <2.6.25, but with normal frequency */
if (fs_2625 && !statfs (w->path, &sfs))
if (sfs.f_type == 0x1373 /* devfs */
|| sfs.f_type == 0xEF53 /* ext2/3 */
|| sfs.f_type == 0x3153464a /* jfs */
|| sfs.f_type == 0x52654973 /* reiser3 */
|| sfs.f_type == 0x01021994 /* tempfs */
|| sfs.f_type == 0x58465342 /* xfs */)
return;
w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
ev_timer_again (EV_A_ &w->timer);
}
/* now re-arm timer, if required */
if (ev_is_active (&w->timer)) ev_ref (EV_A);
ev_timer_again (EV_A_ &w->timer);
if (ev_is_active (&w->timer)) ev_unref (EV_A);
}
static void noinline
@ -3064,7 +3070,12 @@ infy_fork (EV_P)
if (fs_fd >= 0)
infy_add (EV_A_ w); /* re-add, no matter what */
else
ev_timer_again (EV_A_ &w->timer);
{
w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
if (ev_is_active (&w->timer)) ev_ref (EV_A);
ev_timer_again (EV_A_ &w->timer);
if (ev_is_active (&w->timer)) ev_unref (EV_A);
}
}
}
}
@ -3144,7 +3155,10 @@ ev_stat_start (EV_P_ ev_stat *w)
infy_add (EV_A_ w);
else
#endif
ev_timer_again (EV_A_ &w->timer);
{
ev_timer_again (EV_A_ &w->timer);
ev_unref (EV_A);
}
ev_start (EV_A_ (W)w, 1);
@ -3163,7 +3177,12 @@ ev_stat_stop (EV_P_ ev_stat *w)
#if EV_USE_INOTIFY
infy_del (EV_A_ w);
#endif
ev_timer_stop (EV_A_ &w->timer);
if (ev_is_active (&w->timer))
{
ev_ref (EV_A);
ev_timer_stop (EV_A_ &w->timer);
}
ev_stop (EV_A_ (W)w);