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diff --git a/doc/html/thread/parallel.html b/doc/html/thread/parallel.html new file mode 100644 index 0000000000..aa662adb41 --- /dev/null +++ b/doc/html/thread/parallel.html @@ -0,0 +1,617 @@ +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> +<title>Parallel - Fork-Join -- EXPERIMENTAL</title> +<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> +<meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> +<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> +<link rel="up" href="../thread.html" title="Chapter 30. Thread 4.5.0"> +<link rel="prev" href="sds.html" title="Synchronized Data Structures"> +<link rel="next" href="time.html" title="Time Requirements"> +</head> +<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> +<table cellpadding="2" width="100%"><tr> +<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td> +<td align="center"><a href="../../../index.html">Home</a></td> +<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td> +<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> +<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> +<td align="center"><a href="../../../more/index.htm">More</a></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="sds.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../thread.html"><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="time.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="section"> +<div class="titlepage"><div><div><h2 class="title" style="clear: both"> +<a name="thread.parallel"></a><a class="link" href="parallel.html" title="Parallel - Fork-Join -- EXPERIMENTAL">Parallel - Fork-Join -- EXPERIMENTAL</a> +</h2></div></div></div> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join">Fork-Join</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.ref">Reference -- EXPERIMENTAL</a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="thread.parallel.fork_join"></a><a class="link" href="parallel.html#thread.parallel.fork_join" title="Fork-Join">Fork-Join</a> +</h3></div></div></div> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.introduction">Introduction</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.tutorial">Tutorial</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.examples">Examples</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.rationale">Design Rationale</a></span></dt> +</dl></div> +<div class="warning"><table border="0" summary="Warning"> +<tr> +<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../doc/src/images/warning.png"></td> +<th align="left">Warning</th> +</tr> +<tr><td align="left" valign="top"><p> + These features are experimental and subject to change in future versions. + There are not too much tests yet, so it is possible that you can find out + some trivial bugs :( + </p></td></tr> +</table></div> +<div class="note"><table border="0" summary="Note"> +<tr> +<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../doc/src/images/note.png"></td> +<th align="left">Note</th> +</tr> +<tr><td align="left" valign="top"><p> + These features are based on the <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4088.pdf" target="_top"><span class="bold"><strong>n4088 - Task Region R3</strong></span></a> C++1y proposal from + P. Halpern, A. Robison, A. Laksberg, H. Sutter, et al. The text that follows + has been adapted from this paper to show the differences. + </p></td></tr> +</table></div> +<p> + The major difference respect to the standard proposal is that we are able + to use a common executor for several task regions. + </p> +<div class="note"><table border="0" summary="Note"> +<tr> +<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../doc/src/images/note.png"></td> +<th align="left">Note</th> +</tr> +<tr><td align="left" valign="top"><p> + Up to now, Boost.Thread doesn't implement the parallel algorithms as defined + in <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4105.pdf" target="_top"><span class="bold"><strong>n4105 - Information technology – Programming languages, their + environments and system software interfaces – Technical Specification + for C++ Extensions for Parallelism</strong></span></a>. + </p></td></tr> +</table></div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.fork_join.introduction"></a><a class="link" href="parallel.html#thread.parallel.fork_join.introduction" title="Introduction">Introduction</a> +</h4></div></div></div> +<p> + This module introduces a C++11/c++14 library function template <code class="computeroutput"><span class="identifier">task_region</span></code> and a library class <code class="computeroutput"><span class="identifier">task_region_handle</span></code> with member functions + <code class="computeroutput"><span class="identifier">run</span></code> and <code class="computeroutput"><span class="identifier">wait</span></code> + that together enable developers to write expressive and portable fork-join + parallel code. + </p> +<p> + The working draft for the Parallelism TS <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4105.pdf" target="_top"><span class="bold"><strong>N4105</strong></span></a> augments the STL algorithms with the + inclusion of parallel execution policies. Programmers use these as a basis + to write additional high-level algorithms that can be implemented in terms + of the provided parallel algorithms. However, the scope of n4105 does not + include lower-level mechanisms to express arbitrary fork-join parallelism + </p> +<p> + The <code class="computeroutput"><span class="identifier">task_region</span></code>, <code class="computeroutput"><span class="identifier">run</span></code> and the <code class="computeroutput"><span class="identifier">wait</span></code> + functions provided by this library are based on the <code class="computeroutput"><span class="identifier">task_group</span></code> + concept that is a part of the common subset of the PPL and the TBB libraries. + </p> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.fork_join.tutorial"></a><a class="link" href="parallel.html#thread.parallel.fork_join.tutorial" title="Tutorial">Tutorial</a> +</h4></div></div></div> +<p> + Consider an example of a parallel traversal of a tree, where a user-provided + function compute is applied to each node of the tree, returning the sum + of the results: + </p> +<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Func</span><span class="special">></span> +<span class="keyword">int</span> <span class="identifier">traverse</span><span class="special">(</span><span class="identifier">node</span> <span class="special">*</span><span class="identifier">n</span><span class="special">,</span> <span class="identifier">Func</span><span class="special">&&</span> <span class="identifier">compute</span><span class="special">)</span> +<span class="special">{</span> + <span class="keyword">int</span> <span class="identifier">left</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">right</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> + <span class="identifier">task_region</span><span class="special">([&](</span><span class="identifier">task_region_handle</span><span class="special">&</span> <span class="identifier">tr</span><span class="special">)</span> <span class="special">{</span> + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span><span class="special">-></span><span class="identifier">left</span><span class="special">)</span> + <span class="identifier">tr</span><span class="special">.</span><span class="identifier">run</span><span class="special">([&]</span> <span class="special">{</span> <span class="identifier">left</span> <span class="special">=</span> <span class="identifier">traverse</span><span class="special">(</span><span class="identifier">n</span><span class="special">-></span><span class="identifier">left</span><span class="special">,</span> <span class="identifier">compute</span><span class="special">);</span> <span class="special">});</span> + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span><span class="special">-></span><span class="identifier">right</span><span class="special">)</span> + <span class="identifier">tr</span><span class="special">.</span><span class="identifier">run</span><span class="special">([&]</span> <span class="special">{</span> <span class="identifier">right</span> <span class="special">=</span> <span class="identifier">traverse</span><span class="special">(</span><span class="identifier">n</span><span class="special">-></span><span class="identifier">right</span><span class="special">,</span> <span class="identifier">compute</span><span class="special">);</span> <span class="special">});</span> + <span class="special">});</span> + <span class="keyword">return</span> <span class="identifier">compute</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">+</span> <span class="identifier">left</span> <span class="special">+</span> <span class="identifier">right</span><span class="special">;</span> +<span class="special">}</span> +</pre> +<p> + The example above demonstrates the use of two of the functions proposed + in this paper, <code class="computeroutput"><span class="identifier">task_region</span></code> + and <code class="computeroutput"><span class="identifier">task_region_handle</span><span class="special">::</span><span class="identifier">run</span></code>. + The <code class="computeroutput"><span class="identifier">task_region</span></code> function + delineates a region in a program code potentially containing invocations + of tasks spawned by the <code class="computeroutput"><span class="identifier">run</span></code> + member function of the <code class="computeroutput"><span class="identifier">task_region_handle</span></code> + class. + </p> +<p> + The run function spawns a task, a unit of work that is allowed to execute + in parallel with respect to the caller. Any parallel tasks spawned by + <code class="computeroutput"><span class="identifier">run</span></code> within the <code class="computeroutput"><span class="identifier">task_region</span></code> are joined back to a single + thread of execution at the end of the <code class="computeroutput"><span class="identifier">task_region</span></code>. + </p> +<p> + <code class="computeroutput"><span class="identifier">run</span></code> takes a user-provided + function object <code class="computeroutput"><span class="identifier">f</span></code> and starts + it asynchronously - i.e. it may return before the execution of <code class="computeroutput"><span class="identifier">f</span></code> completes. The implementation's scheduler + may choose to run <code class="computeroutput"><span class="identifier">f</span></code> immediately + or delay running <code class="computeroutput"><span class="identifier">f</span></code> until + compute resources become available. + </p> +<p> + A <code class="computeroutput"><span class="identifier">task_region_handle</span></code> can + be constructed only by <code class="computeroutput"><span class="identifier">task_region</span></code> + because it has no public constructors. Thus, <code class="computeroutput"><span class="identifier">run</span></code> + can be invoked (directly or indirectly) only from a user-provided function + passed to <code class="computeroutput"><span class="identifier">task_region</span></code>: + </p> +<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">g</span><span class="special">();</span> +<span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">task_region_handle</span><span class="special">&</span> <span class="identifier">tr</span><span class="special">)</span> +<span class="special">{</span> + <span class="identifier">tr</span><span class="special">.</span><span class="identifier">run</span><span class="special">(</span><span class="identifier">g</span><span class="special">);</span> <span class="comment">// OK, invoked from within task_region in h</span> +<span class="special">}</span> +<span class="keyword">void</span> <span class="identifier">h</span><span class="special">()</span> +<span class="special">{</span> + <span class="identifier">task_region</span><span class="special">(</span><span class="identifier">f</span><span class="special">);</span> +<span class="special">}</span> + +<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> +<span class="special">{</span> + <span class="identifier">task_region_handle</span> <span class="identifier">tr</span><span class="special">;</span> <span class="comment">// Error: no public constructor</span> + <span class="identifier">tr</span><span class="special">.</span><span class="identifier">run</span><span class="special">(</span><span class="identifier">g</span><span class="special">);</span> <span class="comment">// No way to call run outside of a task_region</span> + <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> +<span class="special">}</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.fork_join.examples"></a><a class="link" href="parallel.html#thread.parallel.fork_join.examples" title="Examples">Examples</a> +</h4></div></div></div> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.examples.fib">Parallel + Fibonacci</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.examples.fibex">Parallel + Fibonacci - Specific executor</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.examples.quick_sort">Parallel + Accumulate</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.fork_join.examples.quick_sort0">Parallel + Quick Sort</a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.fork_join.examples.fib"></a><a class="link" href="parallel.html#thread.parallel.fork_join.examples.fib" title="Parallel Fibonacci">Parallel + Fibonacci</a> +</h5></div></div></div> +<p> + This is surely the worst implementation of the Fibonacci function. Anyway, + here it is, as it is simple and shows the fork-join structure clearly. + <code class="computeroutput"><span class="identifier">Fibonacci</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">Fibonacci</span><span class="special">(</span><span class="identifier">n</span><span class="special">-</span><span class="number">1</span><span class="special">)</span> + <span class="special">+</span> <span class="identifier">Fibonacci</span><span class="special">(</span><span class="identifier">n</span><span class="special">-</span><span class="number">2</span><span class="special">)</span></code>, + so the task decomposition is trivial. + </p> +<pre class="programlisting"><span class="keyword">int</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">n</span><span class="special">)</span> +<span class="special">{</span> + <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">experimental</span><span class="special">::</span><span class="identifier">parallel</span><span class="special">::</span><span class="identifier">task_region</span><span class="special">;</span> + <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">experimental</span><span class="special">::</span><span class="identifier">parallel</span><span class="special">::</span><span class="identifier">task_region_handle</span><span class="special">;</span> + + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> <span class="keyword">return</span> <span class="number">1</span><span class="special">;</span> + + <span class="keyword">int</span> <span class="identifier">n1</span><span class="special">;</span> + <span class="keyword">int</span> <span class="identifier">n2</span><span class="special">;</span> + + <span class="identifier">task_region</span><span class="special">([&](</span><span class="identifier">task_region_handle</span><span class="special">&</span> <span class="identifier">trh</span><span class="special">)</span> + <span class="special">{</span> + <span class="identifier">trh</span><span class="special">.</span><span class="identifier">run</span><span class="special">([&]</span> + <span class="special">{</span> + <span class="identifier">n1</span> <span class="special">=</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="identifier">n</span> <span class="special">-</span> <span class="number">1</span><span class="special">);</span> + <span class="special">});</span> + + <span class="identifier">n2</span> <span class="special">=</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="identifier">n</span> <span class="special">-</span> <span class="number">2</span><span class="special">);</span> + <span class="special">});</span> + + <span class="keyword">return</span> <span class="identifier">n1</span> <span class="special">+</span> <span class="identifier">n2</span><span class="special">;</span> +<span class="special">}</span> + +<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> +<span class="special">{</span> + <span class="keyword">for</span> <span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="identifier">i</span><span class="special"><</span><span class="number">10</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> <span class="special">{</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="identifier">i</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" "</span><span class="special">;</span> + <span class="special">}</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> +<span class="special">}</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.fork_join.examples.fibex"></a><a class="link" href="parallel.html#thread.parallel.fork_join.examples.fibex" title="Parallel Fibonacci - Specific executor">Parallel + Fibonacci - Specific executor</a> +</h5></div></div></div> +<p> + The previous example make use of an implementation defined way to spawn + the tasks. Often the user wants to master how the task must be spawned. + There is an overload of <code class="computeroutput"><span class="identifier">task_region</span></code> + that accept an additional <code class="computeroutput"><span class="identifier">Executor</span></code> + parameter and a function that takes as parameter a <code class="computeroutput"><span class="identifier">task_region_handle_gen</span><span class="special"><</span><span class="identifier">Executor</span><span class="special">></span></code>. <code class="computeroutput"><span class="identifier">task_region_handle_gen</span><span class="special"><</span><span class="identifier">Executor</span><span class="special">></span></code> run uses this executor to spawn the + tasks. + </p> +<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Ex</span><span class="special">></span> +<span class="keyword">int</span> <span class="identifier">fib_task_region_gen</span><span class="special">(</span> <span class="identifier">Ex</span><span class="special">&</span> <span class="identifier">ex</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">n</span><span class="special">)</span> +<span class="special">{</span> + <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">experimental</span><span class="special">::</span><span class="identifier">parallel</span><span class="special">::</span><span class="identifier">task_region</span><span class="special">;</span> + <span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">experimental</span><span class="special">::</span><span class="identifier">parallel</span><span class="special">::</span><span class="identifier">task_region_handle_gen</span><span class="special">;</span> + + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="number">0</span><span class="special">)</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> + <span class="keyword">if</span> <span class="special">(</span><span class="identifier">n</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> <span class="keyword">return</span> <span class="number">1</span><span class="special">;</span> + + <span class="keyword">int</span> <span class="identifier">n1</span><span class="special">;</span> + <span class="keyword">int</span> <span class="identifier">n2</span><span class="special">;</span> + + <span class="identifier">task_region</span><span class="special">(</span><span class="identifier">ex</span><span class="special">,</span> <span class="special">[&](</span><span class="identifier">task_region_handle_gen</span><span class="special"><</span><span class="identifier">Ex</span><span class="special">>&</span> <span class="identifier">trh</span><span class="special">)</span> <span class="comment">// (2)</span> + <span class="special">{</span> + <span class="identifier">trh</span><span class="special">.</span><span class="identifier">run</span><span class="special">([&]</span> + <span class="special">{</span> + <span class="identifier">n1</span> <span class="special">=</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="identifier">n</span> <span class="special">-</span> <span class="number">1</span><span class="special">);</span> + <span class="special">});</span> + + <span class="identifier">n2</span> <span class="special">=</span> <span class="identifier">fib_task_region</span><span class="special">(</span><span class="identifier">n</span> <span class="special">-</span> <span class="number">2</span><span class="special">);</span> + <span class="special">});</span> + + <span class="keyword">return</span> <span class="identifier">n1</span> <span class="special">+</span> <span class="identifier">n2</span><span class="special">;</span> +<span class="special">}</span> + +<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> +<span class="special">{</span> + <span class="identifier">boost</span><span class="special">::</span><span class="identifier">basic_thread_pool</span> <span class="identifier">tp</span><span class="special">;</span> <span class="comment">// (1)</span> + <span class="keyword">for</span> <span class="special">(</span><span class="keyword">int</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="identifier">i</span><span class="special"><</span><span class="number">10</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> <span class="special">{</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">fib_task_region_gen</span><span class="special">(</span><span class="identifier">tp</span><span class="special">,</span><span class="identifier">i</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" "</span><span class="special">;</span> + <span class="special">}</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> + <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> +<span class="special">}</span> +</pre> +<p> + The specific executor is declared in line (1) and it is used in line + (2). + </p> +</div> +<div class="section"><div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.fork_join.examples.quick_sort"></a><a class="link" href="parallel.html#thread.parallel.fork_join.examples.quick_sort" title="Parallel Accumulate">Parallel + Accumulate</a> +</h5></div></div></div></div> +<div class="section"><div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.fork_join.examples.quick_sort0"></a><a class="link" href="parallel.html#thread.parallel.fork_join.examples.quick_sort0" title="Parallel Quick Sort">Parallel + Quick Sort</a> +</h5></div></div></div></div> +</div> +<div class="section"><div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.fork_join.rationale"></a><a class="link" href="parallel.html#thread.parallel.fork_join.rationale" title="Design Rationale">Design Rationale</a> +</h4></div></div></div></div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h3 class="title"> +<a name="thread.parallel.ref"></a><a class="link" href="parallel.html#thread.parallel.ref" title="Reference -- EXPERIMENTAL">Reference -- EXPERIMENTAL</a> +</h3></div></div></div> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="parallel.html#thread.parallel.ref.v1">Parallel V1</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.ref.v2">Parallel V2</a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.ref.v1"></a><a class="link" href="parallel.html#thread.parallel.ref.v1" title="Parallel V1">Parallel V1</a> +</h4></div></div></div> +<div class="toc"><dl class="toc"><dt><span class="section"><a href="parallel.html#thread.parallel.ref.v1.exception_list">Header <code class="computeroutput"><span class="special"><</span><span class="identifier">experimental</span><span class="special">/</span><span class="identifier">exception_list</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a></span></dt></dl></div> +<div class="section"> +<div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.ref.v1.exception_list"></a><a class="link" href="parallel.html#thread.parallel.ref.v1.exception_list" title="Header <experimental/exception_list.hpp>">Header <code class="computeroutput"><span class="special"><</span><span class="identifier">experimental</span><span class="special">/</span><span class="identifier">exception_list</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a> +</h5></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v1</span> +<span class="special">{</span> + + <span class="keyword">class</span> <span class="identifier">exception_list</span><span class="special">;</span> + +<span class="special">}</span> <span class="comment">// v1</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v1.exception_list.exception_list"></a><a class="link" href="parallel.html#thread.parallel.ref.v1.exception_list.exception_list" title="Class exception_list">Class + <code class="computeroutput"><span class="identifier">exception_list</span></code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v1</span> +<span class="special">{</span> + + <span class="keyword">class</span> <span class="identifier">exception_list</span><span class="special">:</span> <span class="keyword">public</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">exception</span> + <span class="special">{</span> + <span class="keyword">public</span><span class="special">:</span> + <span class="keyword">typedef</span> <span class="char">'implementation defined'</span> <span class="identifier">const_iterator</span><span class="special">;</span> + + <span class="special">~</span><span class="identifier">exception_list</span><span class="special">()</span> <span class="keyword">noexcept</span> <span class="special">{}</span> + + <span class="keyword">void</span> <span class="identifier">add</span><span class="special">(</span><span class="identifier">exception_ptr</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">e</span><span class="special">);</span> + <span class="identifier">size_t</span> <span class="identifier">size</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="identifier">const_iterator</span> <span class="identifier">begin</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="identifier">const_iterator</span> <span class="identifier">end</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">what</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> + + <span class="special">};</span> + +<span class="special">}</span> <span class="comment">// v1</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +</div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h4 class="title"> +<a name="thread.parallel.ref.v2"></a><a class="link" href="parallel.html#thread.parallel.ref.v2" title="Parallel V2">Parallel V2</a> +</h4></div></div></div> +<div class="toc"><dl class="toc"> +<dt><span class="section"><a href="parallel.html#thread.parallel.ref.v2.concepts">Concepts</a></span></dt> +<dt><span class="section"><a href="parallel.html#thread.parallel.ref.v2.task_region">Header <code class="computeroutput"><span class="special"><</span><span class="identifier">experimental</span><span class="special">/</span><span class="identifier">task_region</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a></span></dt> +</dl></div> +<div class="section"> +<div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.ref.v2.concepts"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.concepts" title="Concepts">Concepts</a> +</h5></div></div></div> +<div class="section"><div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.concepts.regionCallable"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.concepts.regionCallable" title="Concept Region_Callable">Concept + <code class="computeroutput"><span class="identifier">Region_Callable</span></code></a> +</h6></div></div></div></div> +<div class="section"><div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.concepts.taskCallable"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.concepts.taskCallable" title="Concept Task_Callable">Concept + <code class="computeroutput"><span class="identifier">Task_Callable</span></code></a> +</h6></div></div></div></div> +</div> +<div class="section"> +<div class="titlepage"><div><div><h5 class="title"> +<a name="thread.parallel.ref.v2.task_region"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region" title="Header <experimental/task_region.hpp>">Header <code class="computeroutput"><span class="special"><</span><span class="identifier">experimental</span><span class="special">/</span><span class="identifier">task_region</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code></a> +</h5></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">class</span> <span class="identifier">task_canceled_exception</span><span class="special">;</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Executor</span><span class="special">></span> + <span class="keyword">class</span> <span class="identifier">task_region_handle_gen</span><span class="special">;</span> + + <span class="keyword">using</span> <span class="identifier">default_executor</span> <span class="special">=</span> <span class="char">'implementation defined'</span><span class="special">;</span> + + <span class="keyword">class</span> <span class="identifier">task_region_handle</span><span class="special">;</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Executor</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region_final</span><span class="special">(</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">f</span><span class="special">);</span> + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region_final</span><span class="special">(</span><span class="identifier">F</span><span class="special">&&</span> <span class="identifier">f</span><span class="special">);</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Executor</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region</span><span class="special">(</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">f</span><span class="special">);</span> + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region</span><span class="special">(</span><span class="identifier">F</span><span class="special">&&</span> <span class="identifier">f</span><span class="special">);</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.task_canceled_exception"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.task_canceled_exception" title="Class task_canceled_exception">Class + <code class="computeroutput"><span class="identifier">task_canceled_exception</span> </code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">class</span> <span class="identifier">task_canceled_exception</span><span class="special">:</span> <span class="keyword">public</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">exception</span> + <span class="special">{</span> + <span class="keyword">public</span><span class="special">:</span> + <span class="identifier">task_canceled_exception</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="identifier">task_canceled_exception</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">task_canceled_exception</span><span class="special">&)</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="identifier">task_canceled_exception</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">task_canceled_exception</span><span class="special">&)</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">what</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span> + <span class="special">};</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.task_region_handle_gen"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.task_region_handle_gen" title="Template Class task_region_handle_gen<>">Template + Class <code class="computeroutput"><span class="identifier">task_region_handle_gen</span><span class="special"><></span></code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Executor</span><span class="special">></span> + <span class="keyword">class</span> <span class="identifier">task_region_handle_gen</span> + <span class="special">{</span> + <span class="keyword">protected</span><span class="special">:</span> + <span class="identifier">task_region_handle_gen</span><span class="special">(</span><span class="identifier">Executor</span><span class="special">&</span> <span class="identifier">ex</span><span class="special">);</span> + + <span class="special">~</span><span class="identifier">task_region_handle_gen</span><span class="special">();</span> + + <span class="keyword">public</span><span class="special">:</span> + <span class="identifier">task_region_handle_gen</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">task_region_handle_gen</span><span class="special">&)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + <span class="identifier">task_region_handle_gen</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">task_region_handle_gen</span><span class="special">&)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + <span class="identifier">task_region_handle_gen</span><span class="special">*</span> <span class="keyword">operator</span><span class="special">&()</span> <span class="keyword">const</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + + <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">run</span><span class="special">(</span><span class="identifier">F</span><span class="special">&&</span> <span class="identifier">f</span><span class="special">);</span> + + <span class="keyword">void</span> <span class="identifier">wait</span><span class="special">();</span> + <span class="special">};</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.default_executor"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.default_executor" title="Class default_executor">Class + <code class="computeroutput"><span class="identifier">default_executor</span> </code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">using</span> <span class="identifier">default_executor</span> <span class="special">=</span> <span class="char">'implementation defined'</span><span class="special">;</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.task_region_handle"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.task_region_handle" title="Class task_region_handle">Class + <code class="computeroutput"><span class="identifier">task_region_handle</span> </code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">class</span> <span class="identifier">task_region_handle</span> <span class="special">:</span> + <span class="keyword">public</span> <span class="identifier">task_region_handle_gen</span><span class="special"><</span><span class="identifier">default_executor</span><span class="special">></span> + <span class="special">{</span> + <span class="keyword">protected</span><span class="special">:</span> + <span class="identifier">task_region_handle</span><span class="special">();</span> + <span class="identifier">task_region_handle</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">task_region_handle</span><span class="special">&)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + <span class="identifier">task_region_handle</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">task_region_handle</span><span class="special">&)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + <span class="identifier">task_region_handle</span><span class="special">*</span> <span class="keyword">operator</span><span class="special">&()</span> <span class="keyword">const</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> + + <span class="special">};</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.task_region_final"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.task_region_final" title="Template Function task_region_final">Template + Function <code class="computeroutput"><span class="identifier">task_region_final</span> + </code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Executor</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region_final</span><span class="special">(</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">f</span><span class="special">);</span> + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region_final</span><span class="special">(</span><span class="identifier">F</span><span class="special">&&</span> <span class="identifier">f</span><span class="special">);</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +<div class="section"> +<div class="titlepage"><div><div><h6 class="title"> +<a name="thread.parallel.ref.v2.task_region.task_region"></a><a class="link" href="parallel.html#thread.parallel.ref.v2.task_region.task_region" title="Template Function task_region">Template + Function <code class="computeroutput"><span class="identifier">task_region</span> </code></a> +</h6></div></div></div> +<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">experimental</span> +<span class="special">{</span> +<span class="keyword">namespace</span> <span class="identifier">parallel</span> +<span class="special">{</span> +<span class="keyword">inline</span> <span class="keyword">namespace</span> <span class="identifier">v2</span> +<span class="special">{</span> + + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Executor</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region</span><span class="special">(</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">f</span><span class="special">);</span> + <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> + <span class="keyword">void</span> <span class="identifier">task_region</span><span class="special">(</span><span class="identifier">F</span><span class="special">&&</span> <span class="identifier">f</span><span class="special">);</span> + +<span class="special">}</span> <span class="comment">// v2</span> +<span class="special">}</span> <span class="comment">// parallel</span> +<span class="special">}</span> <span class="comment">// experimental</span> +<span class="special">}</span> <span class="comment">// boost</span> +</pre> +</div> +</div> +</div> +</div> +</div> +<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> +<td align="left"></td> +<td align="right"><div class="copyright-footer">Copyright © 2007 -11 Anthony Williams<br>Copyright © 2011 -15 Vicente J. Botet Escriba<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></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="sds.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../thread.html"><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="time.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |