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  27 <a name="boost_asio.tutorial.tuttimer5.src"></a><a class="link" href="src.html" title="Source listing for Timer.5">Source listing for
  28         Timer.5</a>
  29 </h4></div></div></div>
  30 <pre class="programlisting"><span class="comment">//</span>
  31 <span class="comment">// timer.cpp</span>
  32 <span class="comment">// ~~~~~~~~~</span>
  33 <span class="comment">//</span>
  34 <span class="comment">// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)</span>
  35 <span class="comment">//</span>
  36 <span class="comment">// Distributed under the Boost Software License, Version 1.0. (See accompanying</span>
  37 <span class="comment">// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)</span>
  38 <span class="comment">//</span>
  39
  40 <span class="special">#</span><span class="identifier">include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
  41 <span class="special">#</span><span class="identifier">include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">asio</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  42 <span class="special">#</span><span class="identifier">include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">thread</span><span class="special">/</span><span class="identifier">thread</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  43 <span class="special">#</span><span class="identifier">include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">bind</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  44 <span class="special">#</span><span class="identifier">include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">date_time</span><span class="special">/</span><span class="identifier">posix_time</span><span class="special">/</span><span class="identifier">posix_time</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
  45
  46 <span class="keyword">class</span> <span class="identifier">printer</span>
  47 <span class="special">{</span>
  48 <span class="keyword">public</span><span class="special">:</span>
  49   <span class="identifier">printer</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">&amp;</span> <span class="identifier">io</span><span class="special">)</span>
  50     <span class="special">:</span> <span class="identifier">strand_</span><span class="special">(</span><span class="identifier">io</span><span class="special">),</span>
  51       <span class="identifier">timer1_</span><span class="special">(</span><span class="identifier">io</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">seconds</span><span class="special">(</span><span class="number">1</span><span class="special">)),</span>
  52       <span class="identifier">timer2_</span><span class="special">(</span><span class="identifier">io</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">seconds</span><span class="special">(</span><span class="number">1</span><span class="special">)),</span>
  53       <span class="identifier">count_</span><span class="special">(</span><span class="number">0</span><span class="special">)</span>
  54   <span class="special">{</span>
  55     <span class="identifier">timer1_</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">strand_</span><span class="special">.</span><span class="identifier">wrap</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">printer</span><span class="special">::</span><span class="identifier">print1</span><span class="special">,</span> <span class="keyword">this</span><span class="special">)));</span>
  56     <span class="identifier">timer2_</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">strand_</span><span class="special">.</span><span class="identifier">wrap</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">printer</span><span class="special">::</span><span class="identifier">print2</span><span class="special">,</span> <span class="keyword">this</span><span class="special">)));</span>
  57   <span class="special">}</span>
  58
  59   <span class="special">~</span><span class="identifier">printer</span><span class="special">()</span>
  60   <span class="special">{</span>
  61     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Final count is "</span> <span class="special">&lt;&lt;</span> <span class="identifier">count_</span> <span class="special">&lt;&lt;</span> <span class="string">"\n"</span><span class="special">;</span>
  62   <span class="special">}</span>
  63
  64   <span class="keyword">void</span> <span class="identifier">print1</span><span class="special">()</span>
  65   <span class="special">{</span>
  66     <span class="keyword">if</span> <span class="special">(</span><span class="identifier">count_</span> <span class="special">&lt;</span> <span class="number">10</span><span class="special">)</span>
  67     <span class="special">{</span>
  68       <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Timer 1: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">count_</span> <span class="special">&lt;&lt;</span> <span class="string">"\n"</span><span class="special">;</span>
  69       <span class="special">++</span><span class="identifier">count_</span><span class="special">;</span>
  70
  71       <span class="identifier">timer1_</span><span class="special">.</span><span class="identifier">expires_at</span><span class="special">(</span><span class="identifier">timer1_</span><span class="special">.</span><span class="identifier">expires_at</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">seconds</span><span class="special">(</span><span class="number">1</span><span class="special">));</span>
  72       <span class="identifier">timer1_</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">strand_</span><span class="special">.</span><span class="identifier">wrap</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">printer</span><span class="special">::</span><span class="identifier">print1</span><span class="special">,</span> <span class="keyword">this</span><span class="special">)));</span>
  73     <span class="special">}</span>
  74   <span class="special">}</span>
  75
  76   <span class="keyword">void</span> <span class="identifier">print2</span><span class="special">()</span>
  77   <span class="special">{</span>
  78     <span class="keyword">if</span> <span class="special">(</span><span class="identifier">count_</span> <span class="special">&lt;</span> <span class="number">10</span><span class="special">)</span>
  79     <span class="special">{</span>
  80       <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Timer 2: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">count_</span> <span class="special">&lt;&lt;</span> <span class="string">"\n"</span><span class="special">;</span>
  81       <span class="special">++</span><span class="identifier">count_</span><span class="special">;</span>
  82
  83       <span class="identifier">timer2_</span><span class="special">.</span><span class="identifier">expires_at</span><span class="special">(</span><span class="identifier">timer2_</span><span class="special">.</span><span class="identifier">expires_at</span><span class="special">()</span> <span class="special">+</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">seconds</span><span class="special">(</span><span class="number">1</span><span class="special">));</span>
  84       <span class="identifier">timer2_</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">strand_</span><span class="special">.</span><span class="identifier">wrap</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">printer</span><span class="special">::</span><span class="identifier">print2</span><span class="special">,</span> <span class="keyword">this</span><span class="special">)));</span>
  85     <span class="special">}</span>
  86   <span class="special">}</span>
  87
  88 <span class="keyword">private</span><span class="special">:</span>
  89   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">strand</span> <span class="identifier">strand_</span><span class="special">;</span>
  90   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">deadline_timer</span> <span class="identifier">timer1_</span><span class="special">;</span>
  91   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">deadline_timer</span> <span class="identifier">timer2_</span><span class="special">;</span>
  92   <span class="keyword">int</span> <span class="identifier">count_</span><span class="special">;</span>
  93 <span class="special">};</span>
  94
  95 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
  96 <span class="special">{</span>
  97   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span> <span class="identifier">io</span><span class="special">;</span>
  98   <span class="identifier">printer</span> <span class="identifier">p</span><span class="special">(</span><span class="identifier">io</span><span class="special">);</span>
  99   <span class="identifier">boost</span><span class="special">::</span><span class="identifier">thread</span> <span class="identifier">t</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">bind</span><span class="special">(&amp;</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">run</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">io</span><span class="special">));</span>
 100   <span class="identifier">io</span><span class="special">.</span><span class="identifier">run</span><span class="special">();</span>
 101   <span class="identifier">t</span><span class="special">.</span><span class="identifier">join</span><span class="special">();</span>
 102
 103   <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 104 <span class="special">}</span>
 105 </pre>
 106 <p>
 107           Return to <a class="link" href="../tuttimer5.html" title="Timer.5 - Synchronising handlers in multithreaded programs">Timer.5 - Synchronising
 108           handlers in multithreaded programs</a>
 109         </p>
 110 </div>
 111 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 112 <td align="left"></td>
 113 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2014 Christopher M. Kohlhoff<p>
 114         Distributed under the Boost Software License, Version 1.0. (See accompanying
 115         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>)
 116       </p>
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