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<title>clTerminateContextKHR</title>
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<div class="refentry">
<a id="id-1"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="clTerminateContextKHR"></a>
<h1>
clTerminateContextKHR
</h1>
<p>
Terminates all pending work associated with the context and renders all data owned by the context invalid.
</p>
</div>
<div class="refsynopsisdiv">
<h2></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">
<a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a> <strong class="fsfunc">clTerminateContextKHR</strong>
(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_context</a>  <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var><code>)</code></td>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="parameters"></a>
<h2>Parameters</h2>
<div class="variablelist">
<dl class="variablelist"></dl>
</div>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
It is the responsibility of the application to release all objects associated with the
context being terminated.
</p>
<p>
When a context is terminated:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: opencircle; ">
<li class="listitem" style="list-style-type: circle">
<p>
The execution status of enqueued commands will be
<code class="constant">CL_TERMINATED_KHR</code>. Event
objects can be queried using
<a class="citerefentry" href="clGetEventInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetEventInfo</span></span></a>.
Event callbacks can be registered and
registered event callbacks will be called with
<code class="varname">event_command_exec_status</code> set to
<code class="constant">CL_TERMINATED_KHR</code>.
<a class="citerefentry" href="clWaitForEvents.html"><span class="citerefentry"><span class="refentrytitle">clWaitForEvents</span></span></a>
will return as immediately for commands
associated with event objects specified in
<code class="varname">event_list</code>. The status of user events can be set.
Event objects can be retained and released.
<a class="citerefentry" href="clGetEventProfilingInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetEventProfilingInfo</span></span></a>
returns
<span class="errorname">CL_PROFILING_INFO_NOT_AVAILABLE</span>.
</p>
</li>
<li class="listitem" style="list-style-type: circle">
<p>
The context is considered to be terminated.
A callback function registered when the
context was created will be called. Only
queries, retain and release operations can be
performed on the context. All other APIs that
use a context as an argument will return
<span class="errorname">CL_CONTEXT_TERMINATED_KHR</span>.
</p>
</li>
<li class="listitem" style="list-style-type: circle">
<p>
The contents of the memory regions of the
memory objects is undefined. Queries,
registering a destructor callback, retain
and release operations can be performed on the
memory objects.
</p>
</li>
<li class="listitem" style="list-style-type: circle">
<p>
Once a context has been terminated, all OpenCL API
calls that create objects or enqueue
commands will return
<span class="errorname">CL_CONTEXT_TERMINATED_KHR</span>.
APIs that release OpenCL
objects will continue to operate as though
<code class="function">clTerminateContextKHR</code> was not called.
</p>
</li>
<li class="listitem" style="list-style-type: circle">
<p>
The behavior of callbacks will remain unchanged,
and will report appropriate error, if
executing after termination of context. This
behavior is similar to enqueued commands,
after the command queue has become invalid.
</p>
</li>
</ul>
</div>
<p>
An implementation that supports this extension
must be able to terminate commands currently
executing on devices or queued across all
command-queues associated with the context that is
being terminated. The implementation cannot
implement this extension by waiting for currently
executing (or queued) commands to finish execution
on devices associated with this context (i.e.
doing a <a class="citerefentry" href="clFinish.html"><span class="citerefentry"><span class="refentrytitle">clFinish</span></span></a>).
</p>
<p>
In Table 4.5, (see
<a class="citerefentry" href="clCreateContext.html"><span class="citerefentry"><span class="refentrytitle">clCreateContext</span></span></a>)
<code class="constant">CL_CONTEXT_TERMINATE_KHR</code>
can be specified in the context properties only if all devices
associated with the context support the ability
to support context termination (i.e.
<code class="constant">CL_DEVICE_TERMINATE_CAPABILITY_CONTEXT_KHR</code>
is set for
<code class="constant">CL_DEVICE_TERMINATE_CAPABILITY_KHR</code>).
Otherwise, context creation fails with error
code of <span class="errorname">CL_INVALID_PROPERTY</span>.
</p>
</div>
<div class="refsect1">
<a id="errors"></a>
<h2>Errors</h2>
<p>
<code class="function">clTerminateContextKHR</code> returns <span class="errorname">CL_SUCCESS</span>
if the function is executed successfully.
Otherwise, it returns one of the following errors:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if <code class="varname">context</code> is not a valid OpenCL context.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_CONTEXT_TERMINATED_KHR</span> if <code class="varname">context</code> has already been terminated.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_OPERATION</span> if
<code class="varname">context</code> was not created with
<code class="constant">CL_CONTEXT_TERMNATE_KHR</code>
set to <code class="constant">CL_TRUE</code>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there
is a failure to allocate resources required by the
OpenCL implementation on the device.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there
is a failure to allocate resources required by the
OpenCL implementation on the host.
</li>
</ul>
</div>
</div>
<div class="refsect1">
<a id="specification"></a>
<h2>Specification</h2>
<p>
<img src="pdficon_small1.gif" />
<a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-extensions.pdf#page=123" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
</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 © 2007-2015 The Khronos Group Inc.
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"Materials"), to deal in the Materials without restriction, including
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