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<h1><errno.h>: System Errors</h1><table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><h2>Defines</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__errno.html#ga5fe247e079b591a68e0fdbf7caec5b70">EDOM</a> 33</td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__errno.html#gaa1591a4f3a86360108de5b9ba34980ca">ERANGE</a> 34</td></tr>
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<tr><td colspan="2"><h2>Variables</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__avr__errno.html#gad65a8842cc674e3ddf69355898c0ecbf">errno</a></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
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<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <<a class="code" href="errno_8h.html">errno.h</a>></span>
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</pre></div><p>Some functions in the library set the global variable <code>errno</code> when an error occurs. The file, <code><<a class="el" href="errno_8h.html">errno.h</a>></code>, provides symbolic names for various error codes. </p>
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<hr/><h2>Define Documentation</h2>
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<a class="anchor" id="ga5fe247e079b591a68e0fdbf7caec5b70"></a><!-- doxytag: member="errno.h::EDOM" ref="ga5fe247e079b591a68e0fdbf7caec5b70" args="" -->
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<td class="memname">#define EDOM 33</td>
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<p>Domain error. </p>
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<a class="anchor" id="gaa1591a4f3a86360108de5b9ba34980ca"></a><!-- doxytag: member="errno.h::ERANGE" ref="gaa1591a4f3a86360108de5b9ba34980ca" args="" -->
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<td class="memname">#define ERANGE 34</td>
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<div class="memdoc">
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<p>Range error. </p>
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<hr/><h2>Variable Documentation</h2>
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<a class="anchor" id="gad65a8842cc674e3ddf69355898c0ecbf"></a><!-- doxytag: member="errno.h::errno" ref="gad65a8842cc674e3ddf69355898c0ecbf" args="" -->
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<div class="memproto">
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<td class="memname">int <a class="el" href="group__avr__errno.html#gad65a8842cc674e3ddf69355898c0ecbf">errno</a></td>
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<div class="memdoc">
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<p>Error code for last error encountered by library. </p>
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<p>The variable <code>errno</code> holds the last error code encountered by a library function. This variable must be cleared by the user prior to calling a library function.</p>
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<dl class="warning"><dt><b>Warning:</b></dt><dd>The <code>errno</code> global variable is not safe to use in a threaded or multi-task system. A race condition can occur if a task is interrupted between the call which sets <code>error</code> and when the task examines <code>errno</code>. If another task changes <code>errno</code> during this time, the result will be incorrect for the interrupted task. </dd></dl>
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