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many fixes to event emulation

master
Marc Alexander Lehmann 2007-11-29 12:21:05 +00:00
parent 2a9f754117
commit 2180940ae4
4 changed files with 52 additions and 58 deletions
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30
ev.3
View File

@ -129,7 +129,7 @@
.\" ========================================================================
.\"
.IX Title ""<STANDARD INPUT>" 1"
.TH "<STANDARD INPUT>" 1 "2007-11-28" "perl v5.8.8" "User Contributed Perl Documentation"
.TH "<STANDARD INPUT>" 1 "2007-11-29" "perl v5.8.8" "User Contributed Perl Documentation"
.SH "NAME"
libev \- a high performance full\-featured event loop written in C
.SH "SYNOPSIS"
@ -1073,23 +1073,25 @@ timer will not fire more than once per event loop iteration.
This will act as if the timer timed out and restart it again if it is
repeating. The exact semantics are:
.Sp
If the timer is started but nonrepeating, stop it.
If the timer is pending, its pending status is cleared.
.Sp
If the timer is repeating, either start it if necessary (with the repeat
value), or reset the running timer to the repeat value.
If the timer is started but nonrepeating, stop it (as if it timed out).
.Sp
If the timer is repeating, either start it if necessary (with the
\&\f(CW\*(C`repeat\*(C'\fR value), or reset the running timer to the \f(CW\*(C`repeat\*(C'\fR value.
.Sp
This sounds a bit complicated, but here is a useful and typical
example: Imagine you have a tcp connection and you want a so-called
idle timeout, that is, you want to be called when there have been,
say, 60 seconds of inactivity on the socket. The easiest way to do
this is to configure an \f(CW\*(C`ev_timer\*(C'\fR with \f(CW\*(C`after\*(C'\fR=\f(CW\*(C`repeat\*(C'\fR=\f(CW60\fR and calling
example: Imagine you have a tcp connection and you want a so-called idle
timeout, that is, you want to be called when there have been, say, 60
seconds of inactivity on the socket. The easiest way to do this is to
configure an \f(CW\*(C`ev_timer\*(C'\fR with a \f(CW\*(C`repeat\*(C'\fR value of \f(CW60\fR and then call
\&\f(CW\*(C`ev_timer_again\*(C'\fR each time you successfully read or write some data. If
you go into an idle state where you do not expect data to travel on the
socket, you can stop the timer, and again will automatically restart it if
need be.
socket, you can \f(CW\*(C`ev_timer_stop\*(C'\fR the timer, and \f(CW\*(C`ev_timer_again\*(C'\fR will
automatically restart it if need be.
.Sp
You can also ignore the \f(CW\*(C`after\*(C'\fR value and \f(CW\*(C`ev_timer_start\*(C'\fR altogether
and only ever use the \f(CW\*(C`repeat\*(C'\fR value:
That means you can ignore the \f(CW\*(C`after\*(C'\fR value and \f(CW\*(C`ev_timer_start\*(C'\fR
altogether and only ever use the \f(CW\*(C`repeat\*(C'\fR value and \f(CW\*(C`ev_timer_again\*(C'\fR:
.Sp
.Vb 8
\& ev_timer_init (timer, callback, 0., 5.);
@ -1102,8 +1104,8 @@ and only ever use the \f(CW\*(C`repeat\*(C'\fR value:
\& ev_timer_again (loop, timer);
.Ve
.Sp
This is more efficient then stopping/starting the timer eahc time you want
to modify its timeout value.
This is more slightly efficient then stopping/starting the timer each time
you want to modify its timeout value.
.IP "ev_tstamp repeat [read\-write]" 4
.IX Item "ev_tstamp repeat [read-write]"
The current \f(CW\*(C`repeat\*(C'\fR value. Will be used each time the watcher times out

29
ev.html
View File

@ -6,7 +6,7 @@
<meta name="description" content="Pod documentation for libev" />
<meta name="inputfile" content="&lt;standard input&gt;" />
<meta name="outputfile" content="&lt;standard output&gt;" />
<meta name="created" content="Wed Nov 28 19:29:25 2007" />
<meta name="created" content="Thu Nov 29 13:21:20 2007" />
<meta name="generator" content="Pod::Xhtml 1.57" />
<link rel="stylesheet" href="http://res.tst.eu/pod.css"/></head>
<body>
@ -954,20 +954,21 @@ timer will not fire more than once per event loop iteration.</p>
<dd>
<p>This will act as if the timer timed out and restart it again if it is
repeating. The exact semantics are:</p>
<p>If the timer is started but nonrepeating, stop it.</p>
<p>If the timer is repeating, either start it if necessary (with the repeat
value), or reset the running timer to the repeat value.</p>
<p>If the timer is pending, its pending status is cleared.</p>
<p>If the timer is started but nonrepeating, stop it (as if it timed out).</p>
<p>If the timer is repeating, either start it if necessary (with the
<code>repeat</code> value), or reset the running timer to the <code>repeat</code> value.</p>
<p>This sounds a bit complicated, but here is a useful and typical
example: Imagine you have a tcp connection and you want a so-called
idle timeout, that is, you want to be called when there have been,
say, 60 seconds of inactivity on the socket. The easiest way to do
this is to configure an <code>ev_timer</code> with <code>after</code>=<code>repeat</code>=<code>60</code> and calling
example: Imagine you have a tcp connection and you want a so-called idle
timeout, that is, you want to be called when there have been, say, 60
seconds of inactivity on the socket. The easiest way to do this is to
configure an <code>ev_timer</code> with a <code>repeat</code> value of <code>60</code> and then call
<code>ev_timer_again</code> each time you successfully read or write some data. If
you go into an idle state where you do not expect data to travel on the
socket, you can stop the timer, and again will automatically restart it if
need be.</p>
<p>You can also ignore the <code>after</code> value and <code>ev_timer_start</code> altogether
and only ever use the <code>repeat</code> value:</p>
socket, you can <code>ev_timer_stop</code> the timer, and <code>ev_timer_again</code> will
automatically restart it if need be.</p>
<p>That means you can ignore the <code>after</code> value and <code>ev_timer_start</code>
altogether and only ever use the <code>repeat</code> value and <code>ev_timer_again</code>:</p>
<pre> ev_timer_init (timer, callback, 0., 5.);
ev_timer_again (loop, timer);
...
@ -978,8 +979,8 @@ and only ever use the <code>repeat</code> value:</p>
ev_timer_again (loop, timer);
</pre>
<p>This is more efficient then stopping/starting the timer eahc time you want
to modify its timeout value.</p>
<p>This is more slightly efficient then stopping/starting the timer each time
you want to modify its timeout value.</p>
</dd>
<dt>ev_tstamp repeat [read-write]</dt>
<dd>

28
ev.pod
View File

@ -918,23 +918,25 @@ timer will not fire more than once per event loop iteration.
This will act as if the timer timed out and restart it again if it is
repeating. The exact semantics are:
If the timer is started but nonrepeating, stop it.
If the timer is pending, its pending status is cleared.
If the timer is repeating, either start it if necessary (with the repeat
value), or reset the running timer to the repeat value.
If the timer is started but nonrepeating, stop it (as if it timed out).
If the timer is repeating, either start it if necessary (with the
C<repeat> value), or reset the running timer to the C<repeat> value.
This sounds a bit complicated, but here is a useful and typical
example: Imagine you have a tcp connection and you want a so-called
idle timeout, that is, you want to be called when there have been,
say, 60 seconds of inactivity on the socket. The easiest way to do
this is to configure an C<ev_timer> with C<after>=C<repeat>=C<60> and calling
example: Imagine you have a tcp connection and you want a so-called idle
timeout, that is, you want to be called when there have been, say, 60
seconds of inactivity on the socket. The easiest way to do this is to
configure an C<ev_timer> with a C<repeat> value of C<60> and then call
C<ev_timer_again> each time you successfully read or write some data. If
you go into an idle state where you do not expect data to travel on the
socket, you can stop the timer, and again will automatically restart it if
need be.
socket, you can C<ev_timer_stop> the timer, and C<ev_timer_again> will
automatically restart it if need be.
You can also ignore the C<after> value and C<ev_timer_start> altogether
and only ever use the C<repeat> value:
That means you can ignore the C<after> value and C<ev_timer_start>
altogether and only ever use the C<repeat> value and C<ev_timer_again>:
ev_timer_init (timer, callback, 0., 5.);
ev_timer_again (loop, timer);
@ -945,8 +947,8 @@ and only ever use the C<repeat> value:
timer->again = 10.;
ev_timer_again (loop, timer);
This is more efficient then stopping/starting the timer eahc time you want
to modify its timeout value.
This is more slightly efficient then stopping/starting the timer each time
you want to modify its timeout value.
=item ev_tstamp repeat [read-write]

23
event.c
View File

@ -160,13 +160,8 @@ x_cb_io (EV_P_ struct ev_io *w, int revents)
{
struct event *ev = (struct event *)(((char *)w) - offsetof (struct event, iosig.io));
if (revents & EV_ERROR)
if ((revents & EV_ERROR) || !(ev->ev_events & EV_PERSIST))
event_del (ev);
else if (!(ev->ev_events & EV_PERSIST) && ev_is_active (w))
{
ev_io_stop (EV_A_ w);
ev->ev_flags &= ~EVLIST_INSERTED;
}
x_cb (ev, revents);
}
@ -237,8 +232,10 @@ int event_add (struct event *ev, struct timeval *tv)
ev->ev_flags |= EVLIST_TIMEOUT;
}
else
if (ev_is_active (&ev->to))
{
ev_timer_stop (EV_A_ &ev->to);
ev->ev_flags &= ~EVLIST_TIMEOUT;
}
ev->ev_flags |= EVLIST_ACTIVE;
@ -250,17 +247,9 @@ int event_del (struct event *ev)
dLOOPev;
if (ev->ev_events & EV_SIGNAL)
{
/* sig */
if (ev_is_active (&ev->iosig.sig))
ev_signal_stop (EV_A_ &ev->iosig.sig);
}
ev_signal_stop (EV_A_ &ev->iosig.sig);
else if (ev->ev_events & (EV_READ | EV_WRITE))
{
/* io */
if (ev_is_active (&ev->iosig.io))
ev_io_stop (EV_A_ &ev->iosig.io);
}
ev_io_stop (EV_A_ &ev->iosig.io);
if (ev_is_active (&ev->to))
ev_timer_stop (EV_A_ &ev->to);