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205 lines
5.9 KiB
HTML
205 lines
5.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Prepare an event</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.event-set" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">event_set</h1>
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<p class="verinfo">(PECL libevent >= 0.0.1)</p><p class="refpurpose"><span class="refname">event_set</span> — <span class="dc-title">Prepare an event</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.event-set-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><a href="event.set.html" class="methodname">event_set</a></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$event</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$fd</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$events</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$callback</code></span>
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[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$arg</code></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Prepares the event to be used in <span class="function"><a href="event.add.html" class="function">event_add()</a></span>. The event
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is prepared to call the function specified by the <code class="parameter">callback</code>
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on the events specified in parameter <code class="parameter">events</code>, which
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is a set of the following flags: <strong><code>EV_TIMEOUT</code></strong>,
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<strong><code>EV_SIGNAL</code></strong>, <strong><code>EV_READ</code></strong>,
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<strong><code>EV_WRITE</code></strong> and <strong><code>EV_PERSIST</code></strong>.
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</p>
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<p class="para">
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If <strong><code>EV_SIGNAL</code></strong> bit is set in parameter <code class="parameter">events</code>,
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the <code class="parameter">fd</code> is interpreted as signal number.
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</p>
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<p class="para">
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After initializing the event, use <span class="function"><a href="event_base_set.html" class="function">event_base_set()</a></span> to
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associate the event with its event base.
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</p>
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<p class="para">
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In case of matching event, these three arguments are passed to the
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<code class="parameter">callback</code> function:
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<dl>
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<dt>
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<code class="parameter">fd</code></dt>
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<dd>
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<p class="para">
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Signal number or resource indicating the stream.
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</p>
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</dd>
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<dt>
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<code class="parameter">events</code></dt>
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<dd>
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<p class="para">
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A flag indicating the event. Consists of the following flags:
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<strong><code>EV_TIMEOUT</code></strong>, <strong><code>EV_SIGNAL</code></strong>,
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<strong><code>EV_READ</code></strong>, <strong><code>EV_WRITE</code></strong>
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and <strong><code>EV_PERSIST</code></strong>.
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</p>
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</dd>
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<dt>
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<code class="parameter">arg</code></dt>
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<dd>
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<p class="para">
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Optional parameter, previously passed to <span class="function"><a href="event.set.html" class="function">event_set()</a></span>
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as <code class="parameter">arg</code>.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.event-set-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">event</code></dt>
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<dd>
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<p class="para">
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Valid event resource.
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</p>
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</dd>
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<dt>
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<code class="parameter">fd</code></dt>
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<dd>
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<p class="para">
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Valid PHP stream resource. The stream must be castable to file
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descriptor, so you most likely won't be able to use any of filtered
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streams.
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</p>
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</dd>
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<dt>
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<code class="parameter">events</code></dt>
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<dd>
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<p class="para">
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A set of flags indicating the desired event, can be
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<strong><code>EV_READ</code></strong> and/or <strong><code>EV_WRITE</code></strong>.
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The additional flag <strong><code>EV_PERSIST</code></strong> makes the event
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to persist until <span class="function"><a href="event.del.html" class="function">event_del()</a></span> is called, otherwise
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the callback is invoked only once.
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</p>
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</dd>
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<dt>
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<code class="parameter">callback</code></dt>
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<dd>
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<p class="para">
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Callback function to be called when the matching event occurs.
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</p>
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</dd>
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<dt>
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<code class="parameter">arg</code></dt>
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<dd>
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<p class="para">
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Optional callback parameter.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.event-set-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<span class="function"><a href="event.set.html" class="function">event_set()</a></span> returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on error.
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.event-set-changelog">
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<h3 class="title">更新日志</h3>
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>0.0.4</td>
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<td>
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<strong><code>EV_SIGNAL</code></strong> support was added.
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div></div></div></body></html> |