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<title>Async: AsyncFdWatch_demo.cpp</title>
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<h1>AsyncFdWatch_demo.cpp</h1><p>An example of how to use the <a class="el" href="classAsync_1_1FdWatch.html" title="A class for watching file descriptors.">Async::FdWatch</a> class</p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include <unistd.h></span>
<span class="preprocessor">#include <cstdio></span>
<span class="preprocessor">#include <iostream></span>
<span class="preprocessor">#include <<a class="code" href="AsyncCppApplication_8h.html" title="The core class for writing asyncronous cpp applications.">AsyncCppApplication.h</a>></span>
<span class="preprocessor">#include <<a class="code" href="AsyncFdWatch_8h.html" title="Contains a watch for file descriptors.">AsyncFdWatch.h</a>></span>
<span class="keyword">using namespace </span>std;
<span class="keyword">using namespace </span>Async;
<span class="keyword">class </span>MyClass : <span class="keyword">public</span> SigC::Object
{
<span class="keyword">public</span>:
MyClass(<span class="keywordtype">void</span>)
{
stdin_watch = <span class="keyword">new</span> <a name="_a0"></a><a class="code" href="classAsync_1_1FdWatch.html" title="A class for watching file descriptors.">FdWatch</a>(STDIN_FILENO, FdWatch::FD_WATCH_RD);
stdin_watch->activity.connect(slot(*<span class="keyword">this</span>, &MyClass::onActivity));
}
~MyClass(<span class="keywordtype">void</span>)
{
<span class="keyword">delete</span> stdin_watch;
}
<span class="keyword">private</span>:
<a class="code" href="classAsync_1_1FdWatch.html" title="A class for watching file descriptors.">FdWatch</a> *stdin_watch;
<span class="keywordtype">void</span> onActivity(<a class="code" href="classAsync_1_1FdWatch.html" title="A class for watching file descriptors.">FdWatch</a> *watch)
{
<span class="keywordtype">char</span> buf[1024];
<span class="keywordtype">int</span> cnt = read(watch-><a name="a1"></a><a class="code" href="classAsync_1_1FdWatch.html#ad49d35413fe844ea5496bddef69ce98a" title="Return the file descriptor being watched.">fd</a>(), buf, <span class="keyword">sizeof</span>(buf)-1);
<span class="keywordflow">if</span> (cnt == -1)
{
perror(<span class="stringliteral">"read"</span>);
Application::app().quit();
<span class="keywordflow">return</span>;
}
buf[cnt] = 0;
cout << <span class="stringliteral">"Read from STDIN: "</span> << buf << endl;
}
};
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)
{
<a name="_a2"></a><a class="code" href="classAsync_1_1CppApplication.html" title="An application class for writing non GUI applications.">CppApplication</a> app;
MyClass my_class;
app.<a name="a3"></a><a class="code" href="classAsync_1_1CppApplication.html#a9a921d33644bbb18767fb4d599f53bf4" title="Execute the application main loop.">exec</a>();
}
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