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| 23 | <a accesskey="p" href="when_all_until_first_exception.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../when_all_functionality.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="when_all__heterogeneous_types.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> | |
| 24 | </div> | |
| 25 | <div class="section"> | |
| 26 | <div class="titlepage"><div><div><h4 class="title"> | |
| 27 | <a name="fiber.when_any.when_all_functionality.wait_all__collecting_all_exceptions"></a><a class="link" href="wait_all__collecting_all_exceptions.html" title="wait_all, collecting all exceptions">wait_all, | |
| 28 | collecting all exceptions</a> | |
| 29 | </h4></div></div></div> | |
| 30 | <p> | |
| 31 | <a name="wait_all_collect_errors"></a>Given <a class="link" href="when_all_until_first_exception.html#wait_all_until_error_source"><code class="computeroutput"><span class="identifier">wait_all_until_error_source</span><span class="special">()</span></code></a>, | |
| 32 | it might be more reasonable to make a <code class="computeroutput"><span class="identifier">wait_all_</span><span class="special">...()</span></code> that collects <span class="emphasis"><em>all</em></span> | |
| 33 | errors instead of presenting only the first: | |
| 34 | </p> | |
| 35 | <p> | |
| 36 | </p> | |
| 37 | <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">Fn</span><span class="special">,</span> <span class="keyword">typename</span> <span class="special">...</span> <span class="identifier">Fns</span> <span class="special">></span> | |
| 38 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">result_of</span><span class="special"><</span> <span class="identifier">Fn</span><span class="special">()</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">></span> | |
| 39 | <span class="identifier">wait_all_collect_errors</span><span class="special">(</span> <span class="identifier">Fn</span> <span class="special">&&</span> <span class="identifier">function</span><span class="special">,</span> <span class="identifier">Fns</span> <span class="special">&&</span> <span class="special">...</span> <span class="identifier">functions</span><span class="special">)</span> <span class="special">{</span> | |
| 40 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">count</span><span class="special">(</span> <span class="number">1</span> <span class="special">+</span> <span class="keyword">sizeof</span> <span class="special">...</span> <span class="special">(</span> <span class="identifier">functions</span><span class="special">)</span> <span class="special">);</span> | |
| 41 | <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">result_of</span><span class="special"><</span> <span class="identifier">Fn</span><span class="special">()</span> <span class="special">>::</span><span class="identifier">type</span> <span class="identifier">return_t</span><span class="special">;</span> | |
| 42 | <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fibers</span><span class="special">::</span><span class="identifier">future</span><span class="special"><</span> <span class="identifier">return_t</span> <span class="special">></span> <span class="identifier">future_t</span><span class="special">;</span> | |
| 43 | <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">return_t</span> <span class="special">></span> <span class="identifier">vector_t</span><span class="special">;</span> | |
| 44 | <span class="identifier">vector_t</span> <span class="identifier">results</span><span class="special">;</span> | |
| 45 | <span class="identifier">results</span><span class="special">.</span><span class="identifier">reserve</span><span class="special">(</span> <span class="identifier">count</span><span class="special">);</span> | |
| 46 | <span class="identifier">exception_list</span> <span class="identifier">exceptions</span><span class="special">(</span><span class="string">"wait_all_collect_errors() exceptions"</span><span class="special">);</span> | |
| 47 | ||
| 48 | <span class="comment">// get channel</span> | |
| 49 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">shared_ptr</span><span class="special"><</span> | |
| 50 | <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fibers</span><span class="special">::</span><span class="identifier">unbounded_channel</span><span class="special"><</span> <span class="identifier">future_t</span> <span class="special">></span> <span class="special">></span> <span class="identifier">channel</span><span class="special">(</span> | |
| 51 | <span class="identifier">wait_all_until_error_source</span><span class="special">(</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span> <span class="identifier">Fn</span> <span class="special">>(</span> <span class="identifier">function</span><span class="special">),</span> | |
| 52 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span> <span class="identifier">Fns</span> <span class="special">>(</span> <span class="identifier">functions</span><span class="special">)</span> <span class="special">...</span> <span class="special">)</span> <span class="special">);</span> | |
| 53 | <span class="comment">// fill results and/or exceptions vectors</span> | |
| 54 | <span class="identifier">future_t</span> <span class="identifier">future</span><span class="special">;</span> | |
| 55 | <span class="keyword">while</span> <span class="special">(</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">fibers</span><span class="special">::</span><span class="identifier">channel_op_status</span><span class="special">::</span><span class="identifier">success</span> <span class="special">==</span> <span class="identifier">channel</span><span class="special">-></span><span class="identifier">pop</span><span class="special">(</span> <span class="identifier">future</span><span class="special">)</span> <span class="special">)</span> <span class="special">{</span> | |
| 56 | <span class="identifier">std</span><span class="special">::</span><span class="identifier">exception_ptr</span> <span class="identifier">exp</span> <span class="special">=</span> <span class="identifier">future</span><span class="special">.</span><span class="identifier">get_exception_ptr</span><span class="special">();</span> | |
| 57 | <span class="keyword">if</span> <span class="special">(</span> <span class="special">!</span> <span class="identifier">exp</span><span class="special">)</span> <span class="special">{</span> | |
| 58 | <span class="identifier">results</span><span class="special">.</span><span class="identifier">push_back</span><span class="special">(</span> <span class="identifier">future</span><span class="special">.</span><span class="identifier">get</span><span class="special">()</span> <span class="special">);</span> | |
| 59 | <span class="special">}</span> <span class="keyword">else</span> <span class="special">{</span> | |
| 60 | <span class="identifier">exceptions</span><span class="special">.</span><span class="identifier">add</span><span class="special">(</span> <span class="identifier">exp</span><span class="special">);</span> | |
| 61 | <span class="special">}</span> | |
| 62 | <span class="special">}</span> | |
| 63 | <span class="comment">// if there were any exceptions, throw</span> | |
| 64 | <span class="keyword">if</span> <span class="special">(</span> <span class="identifier">exceptions</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span> <span class="special">)</span> <span class="special">{</span> | |
| 65 | <span class="keyword">throw</span> <span class="identifier">exceptions</span><span class="special">;</span> | |
| 66 | <span class="special">}</span> | |
| 67 | <span class="comment">// no exceptions: return vector to caller</span> | |
| 68 | <span class="keyword">return</span> <span class="identifier">results</span><span class="special">;</span> | |
| 69 | <span class="special">}</span> | |
| 70 | </pre> | |
| 71 | <p> | |
| 72 | </p> | |
| 73 | <p> | |
| 74 | The implementation is a simple variation on <a class="link" href="../when_any/when_any__produce_first_success.html#wait_first_success"><code class="computeroutput"><span class="identifier">wait_first_success</span><span class="special">()</span></code></a>, | |
| 75 | using the same <a class="link" href="../when_any/when_any__produce_first_success.html#exception_list"><code class="computeroutput"><span class="identifier">exception_list</span></code></a> | |
| 76 | exception class. | |
| 77 | </p> | |
| 78 | </div> | |
| 79 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 80 | <td align="left"></td> | |
| 81 | <td align="right"><div class="copyright-footer">Copyright © 2013 Oliver Kowalke<p> | |
| 82 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 83 | 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>) | |
| 84 | </p> | |
| 85 | </div></td> | |
| 86 | </tr></table> | |
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