You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
186 lines
5.4 KiB
186 lines
5.4 KiB
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<!-- saved from url=(0014)about:internet -->
|
|
<html xmlns:MSHelp="http://www.microsoft.com/MSHelp/" lang="en-us" xml:lang="en-us"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
|
|
|
<meta name="DC.Type" content="reference">
|
|
<meta name="DC.Title" content="Threads">
|
|
<meta name="DC.subject" content="Threads">
|
|
<meta name="keywords" content="Threads">
|
|
<meta name="DC.Relation" scheme="URI" content="../reference/reference.htm">
|
|
<meta name="DC.Relation" scheme="URI" content="../reference/threads/thread_cls.htm">
|
|
<meta name="DC.Relation" scheme="URI" content="../reference/threads/thread_id.htm">
|
|
<meta name="DC.Relation" scheme="URI" content="../reference/threads/this_thread_namespace.htm">
|
|
<meta name="DC.Relation" scheme="URI" content="general_conventions/namespaces.htm">
|
|
<meta name="DC.Format" content="XHTML">
|
|
<meta name="DC.Identifier" content="threads">
|
|
<meta name="DC.Language" content="en-US">
|
|
<link rel="stylesheet" type="text/css" href="../intel_css_styles.css">
|
|
<title>Threads</title>
|
|
</head>
|
|
<body id="threads">
|
|
<!-- ==============(Start:NavScript)================= -->
|
|
<script src="..\NavScript.js" language="JavaScript1.2" type="text/javascript"></script>
|
|
<script language="JavaScript1.2" type="text/javascript">WriteNavLink(1);</script>
|
|
<!-- ==============(End:NavScript)================= -->
|
|
<a name="threads"><!-- --></a>
|
|
|
|
|
|
<h1 class="topictitle1">Threads</h1>
|
|
|
|
|
|
<div>
|
|
<div class="section">
|
|
<p>Intel® Threading Building Blocks (Intel® TBB)
|
|
provides a wrapper around the platform's native threads, based upon the N3000
|
|
working draft for C++11. Using this wrapper has two benefits:
|
|
</p>
|
|
|
|
<ul type="disc">
|
|
<li>
|
|
<p>It makes threaded code portable across
|
|
platforms.
|
|
</p>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<p>It eases later migration to ISO C++11
|
|
threads.
|
|
</p>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
<p>The library defines the wrapper in namespace
|
|
<samp class="codeph">std</samp>, not namespace
|
|
<samp class="codeph">tbb</samp>, as explained in Section Namespace.
|
|
</p>
|
|
|
|
<p>The significant departures from N3000 are shown in
|
|
the table below.
|
|
</p>
|
|
|
|
|
|
<div class="tablenoborder"><a name="tbl36"><!-- --></a><table cellpadding="4" summary="" id="tbl36" width="100%" frame="hsides" border="1" rules="all"><caption><span class="tablecap">Differences Between N3000 and Intel® TBB
|
|
Thread Class</span></caption>
|
|
|
|
|
|
<thead align="left">
|
|
<tr>
|
|
<th class="cellrowborder" valign="top" width="NaN%" id="d123197e64">
|
|
<p>N3000
|
|
</p>
|
|
|
|
</th>
|
|
|
|
<th class="row-nocellborder" valign="top" width="NaN%" id="d123197e70">
|
|
<p>Intel® TBB
|
|
</p>
|
|
|
|
</th>
|
|
|
|
</tr>
|
|
</thead>
|
|
|
|
<tbody>
|
|
<tr>
|
|
<td class="cellrowborder" valign="top" width="NaN%" headers="d123197e64 ">
|
|
<p><samp class="codeph">template<class Rep, class
|
|
Period> std::this_thread::sleep_for(</samp>
|
|
</p>
|
|
|
|
<p><samp class="codeph">const chrono::duration<Rep,
|
|
Period>& rel_time)</samp>
|
|
</p>
|
|
|
|
</td>
|
|
|
|
<td class="row-nocellborder" valign="top" width="NaN%" headers="d123197e70 ">
|
|
<p><samp class="codeph">std::this_thread::sleep_for(
|
|
tick_count::interval_t )</samp>
|
|
</p>
|
|
|
|
</td>
|
|
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="cellrowborder" valign="top" width="NaN%" headers="d123197e64 ">
|
|
<p>rvalue reference parameters
|
|
</p>
|
|
|
|
</td>
|
|
|
|
<td class="row-nocellborder" valign="top" width="NaN%" headers="d123197e70 ">
|
|
<p>Parameter changed to plain value, or
|
|
function removed, as appropriate.
|
|
</p>
|
|
|
|
</td>
|
|
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="cellrowborder" valign="top" width="NaN%" headers="d123197e64 ">
|
|
<p>constructor for
|
|
<samp class="codeph">std::thread</samp> takes arbitrary number of
|
|
arguments.
|
|
</p>
|
|
|
|
</td>
|
|
|
|
<td class="row-nocellborder" valign="top" width="NaN%" headers="d123197e70 ">
|
|
<p>constructor for
|
|
<samp class="codeph">std::thread</samp> takes 0-3 arguments.
|
|
</p>
|
|
|
|
</td>
|
|
|
|
</tr>
|
|
|
|
</tbody>
|
|
|
|
</table>
|
|
</div>
|
|
|
|
<p>The other changes are for compatibility with the
|
|
current C++ standard or Intel® TBB. For example, constructors that have an
|
|
arbitrary number of arguments require the variadic template features of C++11.
|
|
</p>
|
|
|
|
<div class="Note"><h3 class="NoteTipHead">
|
|
Caution</h3>
|
|
<p>Threads are heavy weight entities on most
|
|
systems, and running too many threads on a system can seriously degrade
|
|
performance. Consider using a task based solution instead if practical.
|
|
</p>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="../reference/reference.htm">Intel® Threading Building Blocks Reference Manual</a></div>
|
|
</div>
|
|
<div class="See Also">
|
|
<ul class="ullinks">
|
|
<li class="ulchildlink"><a href="../reference/threads/thread_cls.htm">thread Class</a><br>
|
|
</li>
|
|
<li class="ulchildlink"><a href="../reference/threads/thread_id.htm">thread::id</a><br>
|
|
</li>
|
|
<li class="ulchildlink"><a href="../reference/threads/this_thread_namespace.htm">this_thread Namespace</a><br>
|
|
</li>
|
|
</ul>
|
|
|
|
<h2>See Also</h2>
|
|
<div class="linklist">
|
|
<div><a href="general_conventions/namespaces.htm">Namespaces, std Namespace
|
|
</a></div></div>
|
|
</div>
|
|
|
|
</body>
|
|
</html>
|