1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Class group</title> 6<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="../../process/reference.html#header.boost.process.group_hpp" title="Header <boost/process/group.hpp>"> 10<link rel="prev" href="extend/get_io_context.html" title="Function template get_io_context"> 11<link rel="next" href="limit_handles.html" title="Global limit_handles"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td> 16<td align="center"><a href="../../../../index.html">Home</a></td> 17<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="extend/get_io_context.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../process/reference.html#header.boost.process.group_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="limit_handles.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.process.group"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Class group</span></h2> 30<p>boost::process::group</p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../process/reference.html#header.boost.process.group_hpp" title="Header <boost/process/group.hpp>">boost/process/group.hpp</a>> 34 35</span> 36<span class="keyword">class</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">{</span> 37<span class="keyword">public</span><span class="special">:</span> 38 <span class="comment">// types</span> 39 <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.process.group.group_handle"></a><span class="identifier">group_handle</span><span class="special">;</span> 40 <span class="keyword">typedef</span> <span class="identifier">group_handle</span><span class="special">::</span><span class="identifier">handle_t</span> <a name="boost.process.group.native_handle_t"></a><span class="identifier">native_handle_t</span><span class="special">;</span> <span class="comment">// Native representation of the handle. </span> 41 42 <span class="comment">// <a class="link" href="group.html#boost.process.groupconstruct-copy-destruct">construct/copy/destruct</a></span> 43 <span class="keyword">explicit</span> <a class="link" href="group.html#idm45243674568608-bb"><span class="identifier">group</span></a><span class="special">(</span><span class="identifier">group_handle</span> <span class="special">&&</span><span class="special">)</span><span class="special">;</span> 44 <span class="keyword">explicit</span> <a class="link" href="group.html#idm45243674567360-bb"><span class="identifier">group</span></a><span class="special">(</span><span class="identifier">native_handle_t</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 45 <a class="link" href="group.html#idm45243674565792-bb"><span class="identifier">group</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> 46 <a class="link" href="group.html#idm45243674564096-bb"><span class="identifier">group</span></a><span class="special">(</span><a class="link" href="group.html" title="Class group">group</a> <span class="special">&&</span><span class="special">)</span><span class="special">;</span> 47 <a class="link" href="group.html#idm45243674562544-bb"><span class="identifier">group</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span> 48 <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span> <a class="link" href="group.html#idm45243674561696-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> 49 <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span> <a class="link" href="group.html#idm45243674559424-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="group.html" title="Class group">group</a> <span class="special">&&</span><span class="special">)</span><span class="special">;</span> 50 <a class="link" href="group.html#idm45243674557296-bb"><span class="special">~</span><span class="identifier">group</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 51 52 <span class="comment">// <a class="link" href="group.html#idm45243674613296-bb">public member functions</a></span> 53 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674612736-bb"><span class="identifier">detach</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 54 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674611600-bb"><span class="identifier">join</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 55 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674610256-bb"><span class="identifier">joinable</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 56 <span class="identifier">native_handle_t</span> <a class="link" href="group.html#idm45243674608976-bb"><span class="identifier">native_handle</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 57 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674607552-bb"><span class="identifier">wait</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 58 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674606400-bb"><span class="identifier">wait</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 59 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Rep<span class="special">,</span> <span class="keyword">typename</span> Period<span class="special">></span> 60 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674604048-bb"><span class="identifier">wait_for</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration</span><span class="special"><</span> <span class="identifier">Rep</span><span class="special">,</span> <span class="identifier">Period</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 61 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Rep<span class="special">,</span> <span class="keyword">typename</span> Period<span class="special">></span> 62 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674600000-bb"><span class="identifier">wait_for</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration</span><span class="special"><</span> <span class="identifier">Rep</span><span class="special">,</span> <span class="identifier">Period</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> 63 <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 64 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Clock<span class="special">,</span> <span class="keyword">typename</span> Duration<span class="special">></span> 65 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674595520-bb"><span class="identifier">wait_until</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">time_point</span><span class="special"><</span> <span class="identifier">Clock</span><span class="special">,</span> <span class="identifier">Duration</span> <span class="special">></span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 66 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Clock<span class="special">,</span> <span class="keyword">typename</span> Duration<span class="special">></span> 67 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674591472-bb"><span class="identifier">wait_until</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">time_point</span><span class="special"><</span> <span class="identifier">Clock</span><span class="special">,</span> <span class="identifier">Duration</span> <span class="special">></span> <span class="special">&</span><span class="special">,</span> 68 <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 69 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674586992-bb"><span class="identifier">valid</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 70 <span class="keyword">explicit</span> <a class="link" href="group.html#idm45243674585568-bb"><span class="keyword">operator</span> <span class="keyword">bool</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 71 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674583872-bb"><span class="identifier">terminate</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> 72 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674582688-bb"><span class="identifier">terminate</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 73 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674580336-bb"><span class="identifier">add</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 74 <span class="keyword">void</span> <a class="link" href="group.html#idm45243674578048-bb"><span class="identifier">add</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 75 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674574560-bb"><span class="identifier">has</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 76 <span class="keyword">bool</span> <a class="link" href="group.html#idm45243674572256-bb"><span class="identifier">has</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> 77<span class="special">}</span><span class="special">;</span></pre></div> 78<div class="refsect1"> 79<a name="id-1.3.30.9.14.5.4"></a><h2>Description</h2> 80<p>Represents a process group.</p> 81<p>Groups are movable but non-copyable. The destructor automatically closes handles to the group process.</p> 82<p>The group will have the same interface as std::thread.</p> 83<div class="note"><table border="0" summary="Note"> 84<tr> 85<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 86<th align="left">Note</th> 87</tr> 88<tr><td align="left" valign="top"><p>If the destructor is called without a previous detach or wait, the group will be terminated.</p></td></tr> 89</table></div> 90<p> 91</p> 92<div class="note"><table border="0" summary="Note"> 93<tr> 94<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 95<th align="left">Note</th> 96</tr> 97<tr><td align="left" valign="top"><p>If a default-constructed group is used before being used in a process launch, the behaviour is undefined.</p></td></tr> 98</table></div> 99<p> 100</p> 101<div class="note"><table border="0" summary="Note"> 102<tr> 103<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 104<th align="left">Note</th> 105</tr> 106<tr><td align="left" valign="top"><p>Waiting for groups is currently broken on windows and will most likely result in a dead-lock. </p></td></tr> 107</table></div> 108<p> 109</p> 110<div class="refsect2"> 111<a name="id-1.3.30.9.14.5.4.6"></a><h3> 112<a name="boost.process.groupconstruct-copy-destruct"></a><code class="computeroutput">group</code> 113 public 114 construct/copy/destruct</h3> 115<div class="orderedlist"><ol class="orderedlist" type="1"> 116<li class="listitem"><pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45243674568608-bb"></a><span class="identifier">group</span><span class="special">(</span><span class="identifier">group_handle</span> <span class="special">&&</span> ch<span class="special">)</span><span class="special">;</span></pre></li> 117<li class="listitem"> 118<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45243674567360-bb"></a><span class="identifier">group</span><span class="special">(</span><span class="identifier">native_handle_t</span> <span class="special">&</span> handle<span class="special">)</span><span class="special">;</span></pre>Construct the group from a native_handle. </li> 119<li class="listitem"><pre class="literallayout"><a name="idm45243674565792-bb"></a><span class="identifier">group</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span></pre></li> 120<li class="listitem"> 121<pre class="literallayout"><a name="idm45243674564096-bb"></a><span class="identifier">group</span><span class="special">(</span><a class="link" href="group.html" title="Class group">group</a> <span class="special">&&</span> lhs<span class="special">)</span><span class="special">;</span></pre>Move constructor. </li> 122<li class="listitem"> 123<pre class="literallayout"><a name="idm45243674562544-bb"></a><span class="identifier">group</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default</span><span class="special">;</span></pre>Default constructor. </li> 124<li class="listitem"><pre class="literallayout"><a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span> <a name="idm45243674561696-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span></pre></li> 125<li class="listitem"> 126<pre class="literallayout"><a class="link" href="group.html" title="Class group">group</a> <span class="special">&</span> <a name="idm45243674559424-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="group.html" title="Class group">group</a> <span class="special">&&</span> lhs<span class="special">)</span><span class="special">;</span></pre>Move assign. </li> 127<li class="listitem"> 128<pre class="literallayout"><a name="idm45243674557296-bb"></a><span class="special">~</span><span class="identifier">group</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> 129<p>Destructor</p> 130<div class="note"><table border="0" summary="Note"> 131<tr> 132<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> 133<th align="left">Note</th> 134</tr> 135<tr><td align="left" valign="top"><p>If the destructor is called without a previous detach or wait, the group will be terminated. </p></td></tr> 136</table></div> 137<p> 138</p> 139</li> 140</ol></div> 141</div> 142<div class="refsect2"> 143<a name="id-1.3.30.9.14.5.4.7"></a><h3> 144<a name="idm45243674613296-bb"></a><code class="computeroutput">group</code> public member functions</h3> 145<div class="orderedlist"><ol class="orderedlist" type="1"> 146<li class="listitem"> 147<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674612736-bb"></a><span class="identifier">detach</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Detach the group. </li> 148<li class="listitem"> 149<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674611600-bb"></a><span class="identifier">join</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> 150<p>Join the child. This just calls wait, but that way the naming is similar to std::thread </p> 151</li> 152<li class="listitem"> 153<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45243674610256-bb"></a><span class="identifier">joinable</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> 154<p>Check if the child is joinable. </p> 155</li> 156<li class="listitem"> 157<pre class="literallayout"><span class="identifier">native_handle_t</span> <a name="idm45243674608976-bb"></a><span class="identifier">native_handle</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Obtain the native handle of the group. </li> 158<li class="listitem"> 159<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674607552-bb"></a><span class="identifier">wait</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Wait for the process group to exit. </li> 160<li class="listitem"> 161<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674606400-bb"></a><span class="identifier">wait</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 162<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 163</li> 164<li class="listitem"> 165<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Rep<span class="special">,</span> <span class="keyword">typename</span> Period<span class="special">></span> 166 <span class="keyword">bool</span> <a name="idm45243674604048-bb"></a><span class="identifier">wait_for</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration</span><span class="special"><</span> <span class="identifier">Rep</span><span class="special">,</span> <span class="identifier">Period</span> <span class="special">></span> <span class="special">&</span> rel_time<span class="special">)</span><span class="special">;</span></pre> 167<p>Wait for the process group to exit for period of time. 168</p> 169<div class="variablelist"><table border="0" class="variablelist compact"> 170<colgroup> 171<col align="left" valign="top"> 172<col> 173</colgroup> 174<tbody><tr> 175<td><p><span class="term">Returns:</span></p></td> 176<td><p>True if all child processes exited while waiting. </p></td> 177</tr></tbody> 178</table></div> 179</li> 180<li class="listitem"> 181<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Rep<span class="special">,</span> <span class="keyword">typename</span> Period<span class="special">></span> 182 <span class="keyword">bool</span> <a name="idm45243674600000-bb"></a><span class="identifier">wait_for</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">duration</span><span class="special"><</span> <span class="identifier">Rep</span><span class="special">,</span> <span class="identifier">Period</span> <span class="special">></span> <span class="special">&</span> rel_time<span class="special">,</span> 183 <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 184<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 185</li> 186<li class="listitem"> 187<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Clock<span class="special">,</span> <span class="keyword">typename</span> Duration<span class="special">></span> 188 <span class="keyword">bool</span> <a name="idm45243674595520-bb"></a><span class="identifier">wait_until</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">time_point</span><span class="special"><</span> <span class="identifier">Clock</span><span class="special">,</span> <span class="identifier">Duration</span> <span class="special">></span> <span class="special">&</span> timeout_time<span class="special">)</span><span class="special">;</span></pre> 189<p>Wait for the process group to exit until a point in time. 190</p> 191<div class="variablelist"><table border="0" class="variablelist compact"> 192<colgroup> 193<col align="left" valign="top"> 194<col> 195</colgroup> 196<tbody><tr> 197<td><p><span class="term">Returns:</span></p></td> 198<td><p>True if all child processes exited while waiting. </p></td> 199</tr></tbody> 200</table></div> 201</li> 202<li class="listitem"> 203<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Clock<span class="special">,</span> <span class="keyword">typename</span> Duration<span class="special">></span> 204 <span class="keyword">bool</span> <a name="idm45243674591472-bb"></a><span class="identifier">wait_until</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">chrono</span><span class="special">::</span><span class="identifier">time_point</span><span class="special"><</span> <span class="identifier">Clock</span><span class="special">,</span> <span class="identifier">Duration</span> <span class="special">></span> <span class="special">&</span> timeout_time<span class="special">,</span> 205 <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 206<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 207</li> 208<li class="listitem"> 209<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45243674586992-bb"></a><span class="identifier">valid</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Check if the group has a valid handle. </li> 210<li class="listitem"> 211<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45243674585568-bb"></a><span class="keyword">operator</span> <span class="keyword">bool</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Convenience to call valid. </li> 212<li class="listitem"> 213<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674583872-bb"></a><span class="identifier">terminate</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Terminate the process group, i.e. all processes in the group. </li> 214<li class="listitem"> 215<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674582688-bb"></a><span class="identifier">terminate</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 216<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 217</li> 218<li class="listitem"> 219<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674580336-bb"></a><span class="identifier">add</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span> c<span class="special">)</span><span class="special">;</span></pre>Assign a child process to the group. </li> 220<li class="listitem"> 221<pre class="literallayout"><span class="keyword">void</span> <a name="idm45243674578048-bb"></a><span class="identifier">add</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span> c<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 222<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 223</li> 224<li class="listitem"> 225<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45243674574560-bb"></a><span class="identifier">has</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span> c<span class="special">)</span><span class="special">;</span></pre>Check if the child process is in the group. </li> 226<li class="listitem"> 227<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45243674572256-bb"></a><span class="identifier">has</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="child.html" title="Class child">child</a> <span class="special">&</span> c<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre> 228<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> 229</li> 230</ol></div> 231</div> 232</div> 233</div> 234<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 235<td align="left"></td> 236<td align="right"><div class="copyright-footer">Copyright © 2006-2012 Julio M. Merino Vidal, Ilya Sokolov, 237 Felipe Tanus, Jeff Flinn, Boris Schaeling<br>Copyright © 2016 Klemens D. Morgenstern<p> 238 Distributed under the Boost Software License, Version 1.0. (See accompanying 239 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 240 </p> 241</div></td> 242</tr></table> 243<hr> 244<div class="spirit-nav"> 245<a accesskey="p" href="extend/get_io_context.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../process/reference.html#header.boost.process.group_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="limit_handles.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 246</div> 247</body> 248</html> 249
