|
|
|
@ -6,7 +6,7 @@ |
|
|
|
<meta name="description" content="Pod documentation for libev" /> |
|
|
|
<meta name="inputfile" content="<standard input>" /> |
|
|
|
<meta name="outputfile" content="<standard output>" /> |
|
|
|
<meta name="created" content="Tue Nov 27 09:20:40 2007" /> |
|
|
|
<meta name="created" content="Tue Nov 27 11:59:06 2007" /> |
|
|
|
<meta name="generator" content="Pod::Xhtml 1.57" /> |
|
|
|
<link rel="stylesheet" href="http://res.tst.eu/pod.css"/></head> |
|
|
|
<body> |
|
|
|
@ -37,11 +37,13 @@ |
|
|
|
<li><a href="#code_ev_idle_code_when_you_ve_got_no"><code>ev_idle</code> - when you've got nothing better to do...</a></li> |
|
|
|
<li><a href="#code_ev_prepare_code_and_code_ev_che"><code>ev_prepare</code> and <code>ev_check</code> - customise your event loop!</a></li> |
|
|
|
<li><a href="#code_ev_embed_code_when_one_backend_"><code>ev_embed</code> - when one backend isn't enough...</a></li> |
|
|
|
<li><a href="#code_ev_fork_code_the_audacity_to_re"><code>ev_fork</code> - the audacity to resume the event loop after a fork</a></li> |
|
|
|
</ul> |
|
|
|
</li> |
|
|
|
<li><a href="#OTHER_FUNCTIONS">OTHER FUNCTIONS</a></li> |
|
|
|
<li><a href="#LIBEVENT_EMULATION">LIBEVENT EMULATION</a></li> |
|
|
|
<li><a href="#C_SUPPORT">C++ SUPPORT</a></li> |
|
|
|
<li><a href="#MACRO_MAGIC">MACRO MAGIC</a></li> |
|
|
|
<li><a href="#EMBEDDING">EMBEDDING</a> |
|
|
|
<ul><li><a href="#FILESETS">FILESETS</a> |
|
|
|
<ul><li><a href="#CORE_EVENT_LOOP">CORE EVENT LOOP</a></li> |
|
|
|
@ -116,10 +118,6 @@ called <code>ev_tstamp</code>, which is what you should use too. It usually alia |
|
|
|
to the <code>double</code> type in C, and when you need to do any calculations on |
|
|
|
it, you should treat it as such.</p> |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</div> |
|
|
|
<h1 id="GLOBAL_FUNCTIONS">GLOBAL FUNCTIONS</h1><p><a href="#TOP" class="toplink">Top</a></p> |
|
|
|
<div id="GLOBAL_FUNCTIONS_CONTENT"> |
|
|
|
@ -607,6 +605,15 @@ received events. Callbacks of both watcher types can start and stop as |
|
|
|
many watchers as they want, and all of them will be taken into account |
|
|
|
(for example, a <code>ev_prepare</code> watcher might start an idle watcher to keep |
|
|
|
<code>ev_loop</code> from blocking).</p> |
|
|
|
</dd> |
|
|
|
<dt><code>EV_EMBED</code></dt> |
|
|
|
<dd> |
|
|
|
<p>The embedded event loop specified in the <code>ev_embed</code> watcher needs attention.</p> |
|
|
|
</dd> |
|
|
|
<dt><code>EV_FORK</code></dt> |
|
|
|
<dd> |
|
|
|
<p>The event loop has been resumed in the child process after fork (see |
|
|
|
<code>ev_fork</code>).</p> |
|
|
|
</dd> |
|
|
|
<dt><code>EV_ERROR</code></dt> |
|
|
|
<dd> |
|
|
|
@ -1481,6 +1488,29 @@ apropriate way for embedded loops.</p> |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</div> |
|
|
|
<h2 id="code_ev_fork_code_the_audacity_to_re"><code>ev_fork</code> - the audacity to resume the event loop after a fork</h2> |
|
|
|
<div id="code_ev_fork_code_the_audacity_to_re-2"> |
|
|
|
<p>Fork watchers are called when a <code>fork ()</code> was detected (usually because |
|
|
|
whoever is a good citizen cared to tell libev about it by calling |
|
|
|
<code>ev_default_fork</code> or <code>ev_loop_fork</code>). The invocation is done before the |
|
|
|
event loop blocks next and before <code>ev_check</code> watchers are being called, |
|
|
|
and only in the child after the fork. If whoever good citizen calling |
|
|
|
<code>ev_default_fork</code> cheats and calls it in the wrong process, the fork |
|
|
|
handlers will be invoked, too, of course.</p> |
|
|
|
<dl> |
|
|
|
<dt>ev_fork_init (ev_signal *, callback)</dt> |
|
|
|
<dd> |
|
|
|
<p>Initialises and configures the fork watcher - it has no parameters of any |
|
|
|
kind. There is a <code>ev_fork_set</code> macro, but using it is utterly pointless, |
|
|
|
believe me.</p> |
|
|
|
</dd> |
|
|
|
</dl> |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</div> |
|
|
|
<h1 id="OTHER_FUNCTIONS">OTHER FUNCTIONS</h1><p><a href="#TOP" class="toplink">Top</a></p> |
|
|
|
<div id="OTHER_FUNCTIONS_CONTENT"> |
|
|
|
@ -1658,6 +1688,70 @@ the constructor.</p> |
|
|
|
io.start (fd, ev::READ); |
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</pre> |
|
|
|
|
|
|
|
</div> |
|
|
|
<h1 id="MACRO_MAGIC">MACRO MAGIC</h1><p><a href="#TOP" class="toplink">Top</a></p> |
|
|
|
<div id="MACRO_MAGIC_CONTENT"> |
|
|
|
<p>Libev can be compiled with a variety of options, the most fundemantal is |
|
|
|
<code>EV_MULTIPLICITY</code>. This option determines wether (most) functions and |
|
|
|
callbacks have an initial <code>struct ev_loop *</code> argument.</p> |
|
|
|
<p>To make it easier to write programs that cope with either variant, the |
|
|
|
following macros are defined:</p> |
|
|
|
<dl> |
|
|
|
<dt><code>EV_A</code>, <code>EV_A_</code></dt> |
|
|
|
<dd> |
|
|
|
<p>This provides the loop <i>argument</i> for functions, if one is required ("ev |
|
|
|
loop argument"). The <code>EV_A</code> form is used when this is the sole argument, |
|
|
|
<code>EV_A_</code> is used when other arguments are following. Example:</p> |
|
|
|
<pre> ev_unref (EV_A); |
|
|
|
ev_timer_add (EV_A_ watcher); |
|
|
|
ev_loop (EV_A_ 0); |
|
|
|
|
|
|
|
</pre> |
|
|
|
<p>It assumes the variable <code>loop</code> of type <code>struct ev_loop *</code> is in scope, |
|
|
|
which is often provided by the following macro.</p> |
|
|
|
</dd> |
|
|
|
<dt><code>EV_P</code>, <code>EV_P_</code></dt> |
|
|
|
<dd> |
|
|
|
<p>This provides the loop <i>parameter</i> for functions, if one is required ("ev |
|
|
|
loop parameter"). The <code>EV_P</code> form is used when this is the sole parameter, |
|
|
|
<code>EV_P_</code> is used when other parameters are following. Example:</p> |
|
|
|
<pre> // this is how ev_unref is being declared |
|
|
|
static void ev_unref (EV_P); |
|
|
|
|
|
|
|
// this is how you can declare your typical callback |
|
|
|
static void cb (EV_P_ ev_timer *w, int revents) |
|
|
|
|
|
|
|
</pre> |
|
|
|
<p>It declares a parameter <code>loop</code> of type <code>struct ev_loop *</code>, quite |
|
|
|
suitable for use with <code>EV_A</code>.</p> |
|
|
|
</dd> |
|
|
|
<dt><code>EV_DEFAULT</code>, <code>EV_DEFAULT_</code></dt> |
|
|
|
<dd> |
|
|
|
<p>Similar to the other two macros, this gives you the value of the default |
|
|
|
loop, if multiple loops are supported ("ev loop default").</p> |
|
|
|
</dd> |
|
|
|
</dl> |
|
|
|
<p>Example: Declare and initialise a check watcher, working regardless of |
|
|
|
wether multiple loops are supported or not.</p> |
|
|
|
<pre> static void |
|
|
|
check_cb (EV_P_ ev_timer *w, int revents) |
|
|
|
{ |
|
|
|
ev_check_stop (EV_A_ w); |
|
|
|
} |
|
|
|
|
|
|
|
ev_check check; |
|
|
|
ev_check_init (&check, check_cb); |
|
|
|
ev_check_start (EV_DEFAULT_ &check); |
|
|
|
ev_loop (EV_DEFAULT_ 0); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</pre> |
|
|
|
|
|
|
|
</div> |
|
|
|
@ -1891,6 +1985,11 @@ defined to be <code>0</code>, then they are not.</p> |
|
|
|
<dt>EV_STAT_ENABLE</dt> |
|
|
|
<dd> |
|
|
|
<p>If undefined or defined to be <code>1</code>, then stat watchers are supported. If |
|
|
|
defined to be <code>0</code>, then they are not.</p> |
|
|
|
</dd> |
|
|
|
<dt>EV_FORK_ENABLE</dt> |
|
|
|
<dd> |
|
|
|
<p>If undefined or defined to be <code>1</code>, then fork watchers are supported. If |
|
|
|
defined to be <code>0</code>, then they are not.</p> |
|
|
|
</dd> |
|
|
|
<dt>EV_MINIMAL</dt> |
|
|
|
|
Marc Alexander Lehmann
14 years ago