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<div id="projectname">GLFW
 <span id="projectnumber">3.0.2</span>
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<div id="projectbrief">A multi-platform library for OpenGL, window and input</div>
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<div class="title">Error handling</div> </div>
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Modules</h2></td></tr>
<tr class="memitem:group__errors"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__errors.html">Error codes</a></td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:ga6f2c8574259246a83b1d0c3baf23046f"><td class="memItemLeft" align="right" valign="top">typedef void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__error.html#ga6f2c8574259246a83b1d0c3baf23046f">GLFWerrorfun</a> )(int, const char *)</td></tr>
<tr class="memdesc:ga6f2c8574259246a83b1d0c3baf23046f"><td class="mdescLeft"> </td><td class="mdescRight">The function signature for error callbacks. <a href="#ga6f2c8574259246a83b1d0c3baf23046f">More...</a><br/></td></tr>
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<tr class="memdesc:gaa5d796c3cf7c1a7f02f845486333fb5f"><td class="mdescLeft"> </td><td class="mdescRight">Sets the error callback. <a href="#gaa5d796c3cf7c1a7f02f845486333fb5f">More...</a><br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<td class="memname">typedef void(* GLFWerrorfun)(int, const char *)</td>
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<p>This is the function signature for error callback functions.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">error</td><td>An <a class="el" href="group__errors.html">error code</a>. </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">description</td><td>A UTF-8 encoded string describing the error.</td></tr>
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</dd>
</dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="group__error.html#gaa5d796c3cf7c1a7f02f845486333fb5f" title="Sets the error callback.">glfwSetErrorCallback</a> </dd></dl>
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<td class="memname"><a class="el" href="group__error.html#ga6f2c8574259246a83b1d0c3baf23046f">GLFWerrorfun</a> glfwSetErrorCallback </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__error.html#ga6f2c8574259246a83b1d0c3baf23046f">GLFWerrorfun</a> </td>
<td class="paramname"><em>cbfun</em></td><td>)</td>
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<p>This function sets the error callback, which is called with an error code and a human-readable description each time a GLFW error occurs.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">cbfun</td><td>The new callback, or <code>NULL</code> to remove the currently set callback. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The previously set callback, or <code>NULL</code> if no callback was set or an error occurred.</dd></dl>
<dl class="section remark"><dt>Remarks</dt><dd>This function may be called before <a class="el" href="group__init.html#ga317aac130a235ab08c6db0834907d85e">glfwInit</a>.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>The error callback is called by the thread where the error was generated. If you are using GLFW from multiple threads, your error callback needs to be written accordingly.</dd>
<dd>
Because the description string provided to the callback may have been generated specifically for that error, it is not guaranteed to be valid after the callback has returned. If you wish to use it after that, you need to make your own copy of it before returning. </dd></dl>
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