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<td ><a href="index.html">Qt 5.9</a></td><td >Thread Support in Qt</td></tr></table><table class="buildversion"><tr>
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<h1 class="title">Thread Support in Qt</h1>
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<p>Qt provides thread support in the form of platform-independent threading classes, a thread-safe way of posting events, and signal-slot connections across threads. This makes it easy to develop portable multithreaded Qt applications and take advantage of multiprocessor machines. Multithreaded programming is also a useful paradigm for performing time-consuming operations without freezing the user interface of an application.</p>
<p>Earlier versions of Qt offered an option to build the library without thread support. Since Qt 4.0, threads are always enabled.</p>
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<p>These articles assume that the reader has basic knowledge about multithreaded applications.</p>
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<li><a href="threads.html#the-threading-classes">The Threading Classes</a></li>
<li><a href="threads-technologies.html">Multithreading Technologies in Qt</a></li>
<li><a href="threads-synchronizing.html">Synchronizing Threads</a></li>
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<li><a href="threads-modules.html">Thread-Support in Qt Modules</a></li>
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<h2 id="the-threading-classes">The Threading Classes</h2>
<p>These classes are relevant to threaded applications.</p>
<p><b>Note: </b>Qt's threading classes are implemented with native threading APIs; e.g., Win32 and pthreads. Therefore, they can be used with threads of the same native API.</p></div>
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