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authorsotech117 <michael_foiani@brown.edu>2024-04-09 03:14:17 -0400
committersotech117 <michael_foiani@brown.edu>2024-04-09 03:14:17 -0400
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treededb9a65c1698202ad485378b4186b667008abe5 /glew/auto/EGL-Registry/sdk/docs/man/xhtml/eglReleaseThread.html
parent818324678bd5dca790c57048e5012d2937a4b5e5 (diff)
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+</style>
+ <title>eglReleaseThread</title>
+ <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
+ </head>
+ <body>
+ <div class="refentry">
+ <a id="eglReleaseThread"></a>
+ <div class="titlepage"></div>
+ <div xmlns="" class="refnamediv">
+ <h1>eglReleaseThread</h1>
+ <p>Release EGL per-thread state</p>
+ </div>
+ <div class="refsynopsisdiv">
+ <h2>C Specification</h2>
+ <div class="funcsynopsis">
+ <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
+ <tr valign="bottom">
+ <td>
+ <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">EGLBoolean <strong class="fsfunc">eglReleaseThread</strong>(</code>
+ <td xmlns="http://www.w3.org/1999/xhtml"><code>void)</code>;</td>
+ <td xmlns="http://www.w3.org/1999/xhtml"> </td>
+ </td>
+ </tr>
+ </table>
+ </div>
+ </div>
+ <div class="refsect1">
+ <a id="description"></a>
+ <h2>Description</h2>
+ <p>
+ <code class="function">eglReleaseThread</code> returns the EGL to its
+ state at thread initialization, releasing all per-thread
+ state including the error status returned by
+ <span class="command"><strong>eglGetError</strong></span>, the currently bound
+ rendering API defined by <span class="command"><strong>eglBindAPI</strong></span>, and
+ the current contexts for each supported client API. The
+ overhead of maintaining this state may be objectionable in
+ applications which create and destroy many threads, but only
+ call EGL or client APIs in a few of those threads at any
+ given time.
+ </p>
+ <p>
+ <code class="constant">EGL_TRUE</code> is returned on success, and the
+ following actions are taken:
+ </p>
+ <div class="itemizedlist">
+ <ul class="itemizedlist" style="list-style-type: disc; ">
+ <li class="listitem">
+ <p>
+ For each client API supported by EGL, if there is a
+ currently bound context, that context is released.
+ This is equivalent to calling
+ <code class="function">eglMakeCurrent</code> with ctx set to
+ <code class="constant">EGL_NO_CONTEXT</code> and both draw
+ and read set to <code class="constant">EGL_NO_SURFACE</code>
+ (see section 3.7.3).
+ </p>
+ </li>
+ <li class="listitem">
+ <p>
+ The current rendering API is reset to its value at
+ thread initialization (see
+ <span class="command"><strong>eglBindAPI</strong></span>).
+ </p>
+ </li>
+ <li class="listitem">
+ <p>
+ Any additional implementation-dependent per-thread
+ state maintained by EGL is marked for deletion as
+ soon as possible.
+ </p>
+ </li>
+ </ul>
+ </div>
+ <p>
+ <code class="function">eglReleaseThread</code> may be called in any
+ thread at any time, and may be called more than once in a
+ single thread. The initialization status of EGL (see section
+ 3.2) is not affected by releasing the thread; only
+ per-thread state is affected.
+ </p>
+ <p>
+ Resources explicitly allocated by calls to EGL, such as
+ contexts, surfaces, and configuration lists, are not
+ affected by <code class="function">eglReleaseThread</code>. Such
+ resources belong not to the thread, but to the EGL
+ implementation as a whole.
+ </p>
+ </div>
+ <div class="refsect1">
+ <a id="notes"></a>
+ <h2>Notes</h2>
+ <p>
+ <code class="function">eglReleaseThread</code> is supported only if the
+ EGL version is 1.2 or greater.
+ </p>
+ <p>
+ Applications may call other EGL routines from a thread
+ following <code class="function">eglReleaseThread</code>, but any
+ such call may reallocate the EGL state previously released.
+ In particular, calling <code class="function">eglGetError</code>
+ immediately following a successful call to
+ <code class="function">eglReleaseThread</code> will return
+ <code class="constant">EGL_SUCCESS</code>, but will also result in
+ reallocating per-thread state.
+ </p>
+ </div>
+ <div class="refsect1">
+ <a id="errors"></a>
+ <h2>Errors</h2>
+ <p>
+ <code class="constant">EGL_FALSE</code> is returned on failure,
+ <code class="constant">EGL_TRUE</code> otherwise. There are no
+ defined conditions under which failure will occur. Even if
+ EGL is not initialized on any EGLDisplay,
+ <code class="function">eglReleaseThread</code> should succeed.
+ </p>
+ <p>
+ However, platform-dependent failures may be signaled through
+ the value returned from <code class="function">eglGetError</code>.
+ Unless the platform-dependent behavior is known, a failed
+ call to <code class="function">eglReleaseThread</code> should be
+ assumed to leave the current rendering API, and the
+ currently bound contexts for each supported client API, in
+ an unknown state.
+ </p>
+ </div>
+ <div class="refsect1">
+ <a id="seealso"></a>
+ <h2>See Also</h2>
+ <p>
+ <a class="citerefentry" href="eglBindAPI.html"><span class="citerefentry"><span class="refentrytitle">eglBindAPI</span></span></a>,
+ <a class="citerefentry" href="eglGetError.html"><span class="citerefentry"><span class="refentrytitle">eglGetError</span></span></a>,
+ <a class="citerefentry" href="eglMakeCurrent.html"><span class="citerefentry"><span class="refentrytitle">eglMakeCurrent</span></span></a>
+ </p>
+ </div>
+ <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>
+Copyright © 2003-2014 The Khronos Group Inc.
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and/or associated documentation files (the
+"Materials"), to deal in the Materials without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Materials, and to
+permit persons to whom the Materials are furnished to do so, subject to
+the condition that this copyright notice and permission notice shall be included
+in all copies or substantial portions of the Materials.
+</div>
+ </div>
+ </body>
+</html>
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