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keepalive fix

master
Marc Alexander Lehmann 2009-04-15 17:49:26 +00:00
parent 58959051f3
commit b8db877371
6 changed files with 135 additions and 86 deletions
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2
Changes
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@ -4,6 +4,7 @@ TODO: ev_time_freeze, ev_time_thaw
TODO: ev_walk
TODO: ev_stop_all
TODO: fix signal handling(?) under win32
3.54
- do not leave the event loop early just because we have no active
watchers, fixing a problem when embedding a kqueue loop
that has active kernel events but no registered watchers
@ -11,6 +12,7 @@ TODO: fix signal handling(?) under win32
- correctly zero the idx values for arrays, so destroying and
reinitialising the default loop actually works (patch by
Malek Hadj-Ali).
- new EV_CUSTOM revents flag for use by applications.
3.53 Sun Feb 15 02:38:20 CET 2009
- fix a bug in event pipe creation on win32 that would cause a

186
ev.c
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@ -572,7 +572,7 @@ ev_time (void)
return tv.tv_sec + tv.tv_usec * 1e-6;
}
ev_tstamp inline_size
inline_size ev_tstamp
get_clock (void)
{
#if EV_USE_MONOTONIC
@ -627,7 +627,7 @@ ev_sleep (ev_tstamp delay)
#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
int inline_size
inline_size int
array_nextsize (int elem, int cur, int cnt)
{
int ncur = cur + 1;
@ -699,7 +699,22 @@ ev_feed_event (EV_P_ void *w, int revents)
}
}
void inline_speed
inline_speed void
feed_reverse (EV_P_ W w)
{
array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
rfeeds [rfeedcnt++] = w;
}
inline_size void
feed_reverse_done (EV_P_ int revents)
{
do
ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
while (rfeedcnt);
}
inline_speed void
queue_events (EV_P_ W *events, int eventcnt, int type)
{
int i;
@ -710,7 +725,7 @@ queue_events (EV_P_ W *events, int eventcnt, int type)
/*****************************************************************************/
void inline_speed
inline_speed void
fd_event (EV_P_ int fd, int revents)
{
ANFD *anfd = anfds + fd;
@ -732,7 +747,7 @@ ev_feed_fd_event (EV_P_ int fd, int revents)
fd_event (EV_A_ fd, revents);
}
void inline_size
inline_size void
fd_reify (EV_P)
{
int i;
@ -776,7 +791,7 @@ fd_reify (EV_P)
fdchangecnt = 0;
}
void inline_size
inline_size void
fd_change (EV_P_ int fd, int flags)
{
unsigned char reify = anfds [fd].reify;
@ -790,7 +805,7 @@ fd_change (EV_P_ int fd, int flags)
}
}
void inline_speed
inline_speed void
fd_kill (EV_P_ int fd)
{
ev_io *w;
@ -802,7 +817,7 @@ fd_kill (EV_P_ int fd)
}
}
int inline_size
inline_size int
fd_valid (int fd)
{
#ifdef _WIN32
@ -875,7 +890,7 @@ fd_rearm_all (EV_P)
#define UPHEAP_DONE(p,k) ((p) == (k))
/* away from the root */
void inline_speed
inline_speed void
downheap (ANHE *heap, int N, int k)
{
ANHE he = heap [k];
@ -925,7 +940,7 @@ downheap (ANHE *heap, int N, int k)
#define UPHEAP_DONE(p,k) (!(p))
/* away from the root */
void inline_speed
inline_speed void
downheap (ANHE *heap, int N, int k)
{
ANHE he = heap [k];
@ -955,7 +970,7 @@ downheap (ANHE *heap, int N, int k)
#endif
/* towards the root */
void inline_speed
inline_speed void
upheap (ANHE *heap, int k)
{
ANHE he = heap [k];
@ -976,7 +991,7 @@ upheap (ANHE *heap, int k)
ev_active (ANHE_w (he)) = k;
}
void inline_size
inline_size void
adjustheap (ANHE *heap, int N, int k)
{
if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
@ -986,7 +1001,7 @@ adjustheap (ANHE *heap, int N, int k)
}
/* rebuild the heap: this function is used only once and executed rarely */
void inline_size
inline_size void
reheap (ANHE *heap, int N)
{
int i;
@ -1012,7 +1027,7 @@ static EV_ATOMIC_T gotsig;
/*****************************************************************************/
void inline_speed
inline_speed void
fd_intern (int fd)
{
#ifdef _WIN32
@ -1052,7 +1067,7 @@ evpipe_init (EV_P)
}
}
void inline_size
inline_size void
evpipe_write (EV_P_ EV_ATOMIC_T *flag)
{
if (!*flag)
@ -1166,7 +1181,7 @@ static ev_signal childev;
# define WIFCONTINUED(status) 0
#endif
void inline_speed
inline_speed void
child_reap (EV_P_ int chain, int pid, int status)
{
ev_child *w;
@ -1454,6 +1469,7 @@ loop_destroy (EV_P)
ev_free (anfds); anfdmax = 0;
/* have to use the microsoft-never-gets-it-right macro */
array_free (rfeed, EMPTY);
array_free (fdchange, EMPTY);
array_free (timer, EMPTY);
#if EV_PERIODIC_ENABLE
@ -1472,10 +1488,10 @@ loop_destroy (EV_P)
}
#if EV_USE_INOTIFY
void inline_size infy_fork (EV_P);
inline_size void infy_fork (EV_P);
#endif
void inline_size
inline_size void
loop_fork (EV_P)
{
#if EV_USE_PORT
@ -1722,7 +1738,7 @@ ev_invoke (EV_P_ void *w, int revents)
EV_CB_INVOKE ((W)w, revents);
}
void inline_speed
inline_speed void
call_pending (EV_P)
{
int pri;
@ -1744,7 +1760,7 @@ call_pending (EV_P)
}
#if EV_IDLE_ENABLE
void inline_size
inline_size void
idle_reify (EV_P)
{
if (expect_false (idleall))
@ -1766,83 +1782,97 @@ idle_reify (EV_P)
}
#endif
void inline_size
inline_size void
timers_reify (EV_P)
{
EV_FREQUENT_CHECK;
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
{
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
/* first reschedule or stop timer */
if (w->repeat)
do
{
ev_at (w) += w->repeat;
if (ev_at (w) < mn_now)
ev_at (w) = mn_now;
ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
/*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
ANHE_at_cache (timers [HEAP0]);
downheap (timers, timercnt, HEAP0);
/* first reschedule or stop timer */
if (w->repeat)
{
ev_at (w) += w->repeat;
if (ev_at (w) < mn_now)
ev_at (w) = mn_now;
assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
ANHE_at_cache (timers [HEAP0]);
downheap (timers, timercnt, HEAP0);
}
else
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
EV_FREQUENT_CHECK;
feed_reverse (EV_A_ (W)w);
}
else
ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
EV_FREQUENT_CHECK;
ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
feed_reverse_done (EV_A_ EV_TIMEOUT);
}
}
#if EV_PERIODIC_ENABLE
void inline_size
inline_size void
periodics_reify (EV_P)
{
EV_FREQUENT_CHECK;
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
{
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
int feed_count = 0;
/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
/* first reschedule or stop timer */
if (w->reschedule_cb)
do
{
ev_at (w) = w->reschedule_cb (w, ev_rt_now);
ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
/*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
ANHE_at_cache (periodics [HEAP0]);
downheap (periodics, periodiccnt, HEAP0);
}
else if (w->interval)
{
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
/* if next trigger time is not sufficiently in the future, put it there */
/* this might happen because of floating point inexactness */
if (ev_at (w) - ev_rt_now < TIME_EPSILON)
/* first reschedule or stop timer */
if (w->reschedule_cb)
{
ev_at (w) += w->interval;
ev_at (w) = w->reschedule_cb (w, ev_rt_now);
/* if interval is unreasonably low we might still have a time in the past */
/* so correct this. this will make the periodic very inexact, but the user */
/* has effectively asked to get triggered more often than possible */
if (ev_at (w) < ev_rt_now)
ev_at (w) = ev_rt_now;
assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
ANHE_at_cache (periodics [HEAP0]);
downheap (periodics, periodiccnt, HEAP0);
}
else if (w->interval)
{
ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
/* if next trigger time is not sufficiently in the future, put it there */
/* this might happen because of floating point inexactness */
if (ev_at (w) - ev_rt_now < TIME_EPSILON)
{
ev_at (w) += w->interval;
ANHE_at_cache (periodics [HEAP0]);
downheap (periodics, periodiccnt, HEAP0);
/* if interval is unreasonably low we might still have a time in the past */
/* so correct this. this will make the periodic very inexact, but the user */
/* has effectively asked to get triggered more often than possible */
if (ev_at (w) < ev_rt_now)
ev_at (w) = ev_rt_now;
}
ANHE_at_cache (periodics [HEAP0]);
downheap (periodics, periodiccnt, HEAP0);
}
else
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
EV_FREQUENT_CHECK;
feed_reverse (EV_A_ (W)w);
}
else
ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
EV_FREQUENT_CHECK;
ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
feed_reverse_done (EV_A_ EV_PERIODIC);
}
}
@ -1868,7 +1898,7 @@ periodics_reschedule (EV_P)
}
#endif
void inline_speed
inline_speed void
time_update (EV_P_ ev_tstamp max_block)
{
int i;
@ -2016,8 +2046,6 @@ ev_loop (EV_P_ int flags)
/* update time to cancel out callback processing overhead */
time_update (EV_A_ 1e100);
waittime = MAX_BLOCKTIME;
if (timercnt)
{
ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
@ -2089,14 +2117,14 @@ ev_unloop (EV_P_ int how)
/*****************************************************************************/
void inline_size
inline_size void
wlist_add (WL *head, WL elem)
{
elem->next = *head;
*head = elem;
}
void inline_size
inline_size void
wlist_del (WL *head, WL elem)
{
while (*head)
@ -2111,7 +2139,7 @@ wlist_del (WL *head, WL elem)
}
}
void inline_speed
inline_speed void
clear_pending (EV_P_ W w)
{
if (w->pending)
@ -2138,7 +2166,7 @@ ev_clear_pending (EV_P_ void *w)
return 0;
}
void inline_size
inline_size void
pri_adjust (EV_P_ W w)
{
int pri = w->priority;
@ -2147,7 +2175,7 @@ pri_adjust (EV_P_ W w)
w->priority = pri;
}
void inline_speed
inline_speed void
ev_start (EV_P_ W w, int active)
{
pri_adjust (EV_A_ w);
@ -2155,7 +2183,7 @@ ev_start (EV_P_ W w, int active)
ev_ref (EV_A);
}
void inline_size
inline_size void
ev_stop (EV_P_ W w)
{
ev_unref (EV_A);
@ -2590,7 +2618,7 @@ infy_cb (EV_P_ ev_io *w, int revents)
infy_wd (EV_A_ ev->wd, ev->wd, ev);
}
void inline_size
inline_size void
check_2625 (EV_P)
{
/* kernels < 2.6.25 are borked
@ -2613,7 +2641,7 @@ check_2625 (EV_P)
fs_2625 = 1;
}
void inline_size
inline_size void
infy_init (EV_P)
{
if (fs_fd != -2)
@ -2633,7 +2661,7 @@ infy_init (EV_P)
}
}
void inline_size
inline_size void
infy_fork (EV_P)
{
int slot;

1
ev.h
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@ -147,6 +147,7 @@ struct ev_loop;
#define EV_EMBED 0x00010000 /* embedded event loop needs sweep */
#define EV_FORK 0x00020000 /* event loop resumed in child */
#define EV_ASYNC 0x00040000 /* async intra-loop signal */
#define EV_CUSTOM 0x01000000 /* for use by user code */
#define EV_ERROR 0x80000000 /* sent when an error occurs */
/* can be used to add custom fields to all watchers, while losing binary compatibility */

21
ev.pod
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@ -728,13 +728,15 @@ If you have a watcher you never unregister that should not keep C<ev_loop>
from returning, call ev_unref() after starting, and ev_ref() before
stopping it.
As an example, libev itself uses this for its internal signal pipe: It is
not visible to the libev user and should not keep C<ev_loop> from exiting
if no event watchers registered by it are active. It is also an excellent
way to do this for generic recurring timers or from within third-party
libraries. Just remember to I<unref after start> and I<ref before stop>
(but only if the watcher wasn't active before, or was active before,
respectively).
As an example, libev itself uses this for its internal signal pipe: It
is not visible to the libev user and should not keep C<ev_loop> from
exiting if no event watchers registered by it are active. It is also an
excellent way to do this for generic recurring timers or from within
third-party libraries. Just remember to I<unref after start> and I<ref
before stop> (but only if the watcher wasn't active before, or was active
before, respectively. Note also that libev might stop watchers itself
(e.g. non-repeating timers) in which case you have to C<ev_ref>
in the callback).
Example: Create a signal watcher, but keep it from keeping C<ev_loop>
running when nothing else is active.
@ -928,6 +930,11 @@ C<ev_fork>).
The given async watcher has been asynchronously notified (see C<ev_async>).
=item C<EV_CUSTOM>
Not ever sent (or otherwise used) by libev itself, but can be freely used
by libev users to signal watchers (e.g. via C<ev_feed_event>).
=item C<EV_ERROR>
An unspecified error has occurred, the watcher has been stopped. This might

5
ev_vars.h
View File

@ -111,6 +111,11 @@ VAR (pendings, ANPENDING *pendings [NUMPRI])
VAR (pendingmax, int pendingmax [NUMPRI])
VAR (pendingcnt, int pendingcnt [NUMPRI])
/* for reverse feeding of events */
VARx(W *, rfeeds)
VARx(int, rfeedmax)
VARx(int, rfeedcnt)
VARx(int *, fdchanges)
VARx(int, fdchangemax)
VARx(int, fdchangecnt)

6
ev_wrap.h
View File

@ -43,6 +43,9 @@
#define pendings ((loop)->pendings)
#define pendingmax ((loop)->pendingmax)
#define pendingcnt ((loop)->pendingcnt)
#define rfeeds ((loop)->rfeeds)
#define rfeedmax ((loop)->rfeedmax)
#define rfeedcnt ((loop)->rfeedcnt)
#define fdchanges ((loop)->fdchanges)
#define fdchangemax ((loop)->fdchangemax)
#define fdchangecnt ((loop)->fdchangecnt)
@ -117,6 +120,9 @@
#undef pendings
#undef pendingmax
#undef pendingcnt
#undef rfeeds
#undef rfeedmax
#undef rfeedcnt
#undef fdchanges
#undef fdchangemax
#undef fdchangecnt