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    <title>clEnqueueSVMMemcpy</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="clEnqueueSVMMemcpy"></a>
        <h1>
            clEnqueueSVMMemcpy
        </h1>
        <p>
            Enqueues a command to do a memcpy operation.
        </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">clEnqueueSVMMemcpy</strong>
                (</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var>, </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_bool</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">blocking_copy</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst_ptr</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay"> void</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src_ptr</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">size</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_events_in_wait_list</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</var><code>)</code></td>
            </tr>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="parameters"></a>
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term">
                <code class="varname">command_queue</code>
              </span>
            </dt>
            <dd>
              <p>Refers to the host command-queue in which the 
                        read / write command will be 
                        queued. <code class="varname">command_queue</code> and 
                        <code class="varname">buffer</code> must be created 
                        with the same OpenCL context.</p>
            </dd>
            <dt>
              <span class="term">
                <code class="varname">blocking_copy</code>
              </span>
            </dt>
            <dd>
              <p>
                      Indicates if the copy operation is blocking or non-blocking. 
                    </p>
              <p>
                        If <code class="varname">blocking_copy</code> is <code class="constant">CL_TRUE</code> 
                        i.e. the copy command is blocking, <code class="function">clEnqueueSVMMemcpy</code> 
                        does not return until the buffer data has been 
                        copied into memory pointed to by <code class="varname">dst_ptr</code>.
                    </p>
              <p>
                        If <code class="varname">blocking_copy</code> is <code class="constant">CL_FALSE</code> 
                        i.e. the copy command is non-blocking, 
                        <code class="function">clEnqueueSVMMemcpy</code> queues a non-blocking 
                        copy command and returns. The contents of 
                        the buffer that <code class="varname">dst_ptr</code> point to cannot 
                        be used until the copy command has completed. The <code class="varname">event</code>
                        argument returns an event object which can be used to 
                        query the execution status of the read 
                        command. When the copy command has completed, the 
                        contents of the buffer that <code class="varname">dst_ptr</code> 
                        points to can be used by the application. 
                    </p>
            </dd>
            <dt>
              <span class="term">
                <code class="varname">size</code>
              </span>
            </dt>
            <dd>
              <p>
                        The size in bytes of data being copied.
                    </p>
            </dd>
            <dt>
              <span class="term">
                <code class="varname">dst_ptr</code>
              </span>
            </dt>
            <dd>
              <p>
                        The pointer to a memory region where data is copied to.
                    </p>
            </dd>
            <dt>
              <span class="term">
                <code class="varname">src_ptr</code>
              </span>
            </dt>
            <dd>
              <p>
                      The pointer to a memory region where data is copied from.
                    </p>
              <p>
                        If <code class="varname">dst_ptr</code> and/or <code class="varname">src_ptr</code> are 
                        allocated using <a class="citerefentry" href="clSVMAlloc.html"><span class="citerefentry"><span class="refentrytitle">clSVMAlloc</span></span></a> 
                        then they must be allocated from the 
                        same context from which <code class="varname">command_queue</code> was created.
                        Otherwise the behavior is undefined.
                    </p>
            </dd>
            <dt>
              <span class="term"><code class="varname">event_wait_list</code> and <code class="varname">num_events_in_wait_list</code></span>
            </dt>
            <dd>
              <p>
                        Specify events that need to complete before 
                        <code class="function">clEnqueueSVMMemcpy</code> can be executed. If 
                        <code class="varname">event_wait_list</code> is NULL, then 
                        <code class="function">clEnqueueSVMMemcpy</code>
                        does not wait on any event to complete. If 
                        <code class="varname">event_wait_list</code> is NULL, 
                        <code class="varname">num_events_in_wait_list</code>
                        must be 0. If <code class="varname">event_wait_list</code> is not 
                        NULL, the list of events pointed to by 
                        <code class="varname">event_wait_list</code> must 
                        be valid and <code class="varname">num_events_in_wait_list</code> 
                        must be greater than 0. The events specified in 
                        <code class="varname">event_wait_list</code> act as synchronization 
                        points. The context associated with events in 
                        <code class="varname">event_wait_list</code> and 
                        <code class="varname">command_queue</code> must be the same. 
                        The memory associated with 
                        <code class="varname">event_wait_list</code> can be 
                        reused or freed after the function returns.
                    </p>
            </dd>
            <dt>
              <span class="term">
                <code class="varname">event</code>
              </span>
            </dt>
            <dd>
              <p>
                        Returns an event object that 
                        identifies this particular command and can be used to query or 
                        queue a wait for this particular command to complete. 
                        <code class="varname">event</code> can be NULL in which case it will 
                        not be possible for the application to query the 
                        status of this command or queue a wait for this 
                        command to complete. If the <code class="varname">event_wait_list</code> 
                        and the <code class="varname">event</code> arguments are not NULL, 
                        the <code class="varname">event</code>
                        argument should not refer to an element of the 
                        <code class="varname">event_wait_list</code> array.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
          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_COMMAND_QUEUE</span> if 
                <code class="varname">command_queue</code> is not a valid host command-queue.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if the context 
                    associated with <code class="varname">command_queue</code> and events in 
                    <code class="varname">event_wait_list</code> are not the same.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span> if 
                <code class="varname">event_wait_list</code> is NULL and 
                <code class="varname">num_events_in_wait_list</code> &gt; 0, or 
                <code class="varname">event_wait_list</code> is not NULL and 
                <code class="varname">num_events_in_wait_list</code> is 0, or 
                if event objects in <code class="varname">event_wait_list</code> 
                are not valid events. 
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST</span> 
                    if the copy operation is blocking and the execution status of any of 
                    the events in <code class="varname">event_wait_list</code> 
                    is a negative integer value.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> 
                    if <code class="varname">dst_ptr</code> or <code class="varname">src_ptr</code> are NULL.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> 
                    if <code class="varname">size</code> is 0.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_COPY_OVERLAP</span> 
                    if the values specified for <code class="varname">dst_ptr</code>, 
                    <code class="varname">src_ptr</code> and <code class="varname">size</code> result in 
                    an overlapping copy.
            </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-2.0.pdf#page=169" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="sharedVirtualMemory.html"><span class="citerefentry"><span class="refentrytitle">Shared Virtual Memory Functions</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 © 2007-2013 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
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