109 lines
8.6 KiB
HTML
109 lines
8.6 KiB
HTML
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
|
<title>spawn (1 of 13 overloads)</title>
|
|
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
|
<link rel="home" href="../../../index.html" title="Asio">
|
|
<link rel="up" href="../spawn.html" title="spawn">
|
|
<link rel="prev" href="../spawn.html" title="spawn">
|
|
<link rel="next" href="overload2.html" title="spawn (2 of 13 overloads)">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
|
</head>
|
|
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
|
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
|
<hr>
|
|
<div class="spirit-nav">
|
|
<a accesskey="p" href="../spawn.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../spawn.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../next.png" alt="Next"></a>
|
|
</div>
|
|
<div class="section">
|
|
<div class="titlepage"><div><div><h4 class="title">
|
|
<a name="asio.reference.spawn.overload1"></a><a class="link" href="overload1.html" title="spawn (1 of 13 overloads)">spawn (1 of 13 overloads)</a>
|
|
</h4></div></div></div>
|
|
<p>
|
|
Start a new stackful coroutine that executes on a given executor.
|
|
</p>
|
|
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
|
|
<span class="keyword">typename</span> <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a><span class="special">,</span>
|
|
<span class="keyword">typename</span> <span class="identifier">F</span><span class="special">,</span>
|
|
<span class="keyword">typename</span> <span class="identifier">CompletionToken</span> <span class="special">=</span> <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a><span class="special">></span>
|
|
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> <span class="identifier">spawn</span><span class="special">(</span>
|
|
<span class="keyword">const</span> <span class="identifier">Executor</span> <span class="special">&</span> <span class="identifier">ex</span><span class="special">,</span>
|
|
<span class="identifier">F</span> <span class="special">&&</span> <span class="identifier">function</span><span class="special">,</span>
|
|
<span class="identifier">CompletionToken</span> <span class="special">&&</span> <span class="identifier">token</span> <span class="special">=</span> <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a><span class="special">,</span>
|
|
<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_executor</span><span class="special"><</span> <span class="identifier">Executor</span> <span class="special">>::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">execution</span><span class="special">::</span><span class="identifier">is_executor</span><span class="special"><</span> <span class="identifier">Executor</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
|
|
</pre>
|
|
<p>
|
|
This function is used to launch a new stackful coroutine.
|
|
</p>
|
|
<h6>
|
|
<a name="asio.reference.spawn.overload1.h0"></a>
|
|
<span><a name="asio.reference.spawn.overload1.parameters"></a></span><a class="link" href="overload1.html#asio.reference.spawn.overload1.parameters">Parameters</a>
|
|
</h6>
|
|
<div class="variablelist">
|
|
<p class="title"><b></b></p>
|
|
<dl>
|
|
<dt><span class="term">ex</span></dt>
|
|
<dd><p>
|
|
Identifies the executor that will run the stackful coroutine.
|
|
</p></dd>
|
|
<dt><span class="term">function</span></dt>
|
|
<dd>
|
|
<p>
|
|
The coroutine function. The function must be callable the signature:
|
|
</p>
|
|
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">function</span><span class="special">(</span><span class="identifier">basic_yield_context</span><span class="special"><</span><span class="identifier">Executor</span><span class="special">></span> <span class="identifier">yield</span><span class="special">);</span>
|
|
</pre>
|
|
</dd>
|
|
<dt><span class="term">token</span></dt>
|
|
<dd><p>
|
|
The <a class="link" href="../../overview/model/completion_tokens.html" title="Completion Tokens">completion
|
|
token</a> that will handle the notification that the coroutine
|
|
has completed. If the return type <code class="computeroutput"><span class="identifier">R</span></code>
|
|
of <code class="computeroutput"><span class="identifier">function</span></code> is <code class="computeroutput"><span class="keyword">void</span></code>, the function signature of the
|
|
completion handler must be:
|
|
</p></dd>
|
|
</dl>
|
|
</div>
|
|
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">exception_ptr</span><span class="special">);</span>
|
|
</pre>
|
|
<p>
|
|
Otherwise, the function signature of the completion handler must be:
|
|
</p>
|
|
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">exception_ptr</span><span class="special">,</span> <span class="identifier">R</span><span class="special">);</span>
|
|
</pre>
|
|
<h6>
|
|
<a name="asio.reference.spawn.overload1.h1"></a>
|
|
<span><a name="asio.reference.spawn.overload1.completion_signature"></a></span><a class="link" href="overload1.html#asio.reference.spawn.overload1.completion_signature">Completion
|
|
Signature</a>
|
|
</h6>
|
|
<pre class="programlisting"><span class="keyword">void</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">exception_ptr</span><span class="special">,</span> <span class="identifier">R</span><span class="special">)</span>
|
|
</pre>
|
|
<p>
|
|
where <code class="computeroutput"><span class="identifier">R</span></code> is the return type
|
|
of the function object.
|
|
</p>
|
|
<h6>
|
|
<a name="asio.reference.spawn.overload1.h2"></a>
|
|
<span><a name="asio.reference.spawn.overload1.per_operation_cancellation"></a></span><a class="link" href="overload1.html#asio.reference.spawn.overload1.per_operation_cancellation">Per-Operation
|
|
Cancellation</a>
|
|
</h6>
|
|
<p>
|
|
The new thread of execution is created with a cancellation state that supports
|
|
<code class="computeroutput"><span class="identifier">cancellation_type</span><span class="special">::</span><span class="identifier">terminal</span></code> values only. To change the cancellation
|
|
state, call the <a class="link" href="../basic_yield_context.html" title="basic_yield_context"><code class="computeroutput"><span class="identifier">basic_yield_context</span></code></a> member function
|
|
<code class="computeroutput"><span class="identifier">reset_cancellation_state</span></code>.
|
|
</p>
|
|
</div>
|
|
<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
|
</p>
|
|
</div>
|
|
<hr>
|
|
<div class="spirit-nav">
|
|
<a accesskey="p" href="../spawn.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../spawn.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../next.png" alt="Next"></a>
|
|
</div>
|
|
</body>
|
|
</html>
|