| <?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
| <!-- saved from url=(0013)about:internet --> | |
| <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" xmlns:xlink="http://www.w3.org/1999/xlink" pref:renderer="mathplayer-dl"> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> | |
| <style xmlns="" type="text/css"> | |
| /* This style sets a margin around the entire page */ | |
| html, body { | |
| margin: 10px; | |
| } | |
| p { | |
| font: normal 16px verdana, sans-serif; | |
| margin: 0; | |
| padding-bottom:12px; | |
| } | |
| h1 { | |
| font: bold 25px verdana, sans-serif; | |
| margin-top: 0; | |
| margin-bottom: 3px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| h2 { | |
| font: bold 19px verdana, sans-serif; | |
| margin-top: 28px; | |
| margin-bottom: 3px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| h3 { | |
| font: bold 19px verdana, sans-serif !important; | |
| margin-top: 28px; | |
| margin-bottom: 3px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| li { | |
| font: normal 16px verdana, sans-serif; | |
| margin-top: 0; | |
| margin-bottom: 18px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| .pdparam { | |
| font: italic 16px verdana, sans-serif; | |
| } | |
| .term { | |
| font: italic 16px verdana, sans-serif; | |
| font-weight: normal; | |
| } | |
| .type { | |
| font: normal 16px verdana, sans-serif !important; | |
| } | |
| .parameter { | |
| font-style: italic; | |
| } | |
| a:link, a:visited { | |
| color: blue; | |
| text-decoration: none; | |
| font: normal 16px; | |
| } | |
| a:hover { | |
| background-color: #FFFF99; | |
| font: normal 16px; | |
| } | |
| div.funcsynopsis { | |
| text-align: left; | |
| background-color: #e6e6e6; | |
| font: normal 16px verdana, sans-serif; | |
| padding-top: 10px; | |
| padding-bottom: 10px; | |
| } | |
| div.funcsynopsis table { | |
| border-collapse: separate; | |
| font: normal 16px verdana, sans-serif; | |
| } | |
| div.funcsynopsis td { | |
| background-color: #e6e6e6; | |
| border: 0 solid #000; | |
| padding: 1px; | |
| font: normal 16px verdana, sans-serif; | |
| } | |
| div.refsect1 { | |
| font-family: verdana, sans-serif; | |
| font-size: 16px; | |
| } | |
| code.constant { | |
| font: normal 16px courier new, monospace !important; | |
| } | |
| span.errorname { | |
| font: normal 16px verdana, sans-serif !important; | |
| } | |
| code.function { | |
| font: bold 16px verdana, sans-serif !important; | |
| } | |
| b.fsfunc { | |
| font: bold 16px verdana, sans-serif !important; | |
| } | |
| code.varname { | |
| font: italic 16px verdana, sans-serif; | |
| } | |
| code.replaceable { | |
| font: italic 16px courier new, monospace; | |
| } | |
| code.funcdef { | |
| font: normal 16px verdana, sans-serif !important; | |
| } | |
| .citerefentry { | |
| font: normal 16px verdana, sans-serif !important; | |
| } | |
| .parameter { | |
| font-style: italic; | |
| } | |
| code.fsfunc { | |
| font: normal 16px verdana, sans-serif !important; | |
| } | |
| /* PARAMETER: This style controls spacing between the terms in Parameter section */ | |
| dt { | |
| margin-top: 15px; | |
| } | |
| /* TABLES: These styles apply to all tables OTHER than the Synopsis and Example tables */ | |
| div.refsect1 table { | |
| width: 100%; | |
| margin-top: 10px; | |
| background-color: #FFF; | |
| border-collapse: collapse; | |
| border-color: #000; | |
| border-width: 1px; | |
| font: normal 16px verdana, sans-serif; | |
| } | |
| div.refsect1 th { | |
| border-collapse: collapse; | |
| border-color: #000; | |
| border-width: 1px; | |
| font: bold 16px verdana, sans-serif; | |
| } | |
| div.refsect1 td { | |
| background-color: #FFF; | |
| padding: 5px; | |
| vertical-align: text-top; | |
| border-collapse: collapse; | |
| border-color: #000; | |
| border-width: 1px; | |
| font: normal 16px verdana, sans-serif; | |
| } | |
| div.refsect1 p{ | |
| font: normal 16px verdana, sans-serif; | |
| margin-top: 8px; | |
| margin-bottom: 8px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| /* EXAMPLE: These styles apply only to the Example section */ | |
| div.refsect2 { | |
| font: normal 16px courier new, monospace !important; | |
| } | |
| div.refsect2 table { | |
| margin-top: 0; | |
| background-color: #e6e6e6; | |
| width: 100%; | |
| border: 0 solid #000; | |
| padding: 2px; | |
| font: normal 16px courier new, monospace !important; | |
| } | |
| div.refsect2 td { | |
| background-color: #e6e6e6; | |
| font: normal 16px courier new, monospace !important; | |
| white-space:pre; | |
| } | |
| /* COPYRIGHT: This style formats the text of the copyright statement at the bottom of the page */ | |
| div.refsect3 { | |
| font: normal 11px verdana, sans-serif; | |
| margin-top: 50px; | |
| margin-bottom: 20px; | |
| padding-top: 0; | |
| padding-bottom: 0; | |
| } | |
| </style> | |
| <title>clEnqueueSVMMap</title> | |
| <meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /> | |
| <meta name="keywords" content="clEnqueueSVMMap" /> | |
| </head> | |
| <body> | |
| <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="clEnqueueSVMMap"></a> | |
| <h1> | |
| clEnqueueSVMMap | |
| </h1> | |
| <p> | |
| Enqueues a command that will allow the host to update a region of a SVM buffer | |
| </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">clEnqueueSVMMap</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="enums.html#cl_bool" target="pagedisplay">cl_bool</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">blocking_map</var>, </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_map_flags" target="pagedisplay">cl_map_flags</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">map_flags</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">*svm_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> | |
| Must be a valid host command-queue. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> blocking_map </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Indicates if the map operation is <code class="varname">blocking</code> or | |
| <code class="varname">non-blocking</code>. | |
| </p> | |
| <p> | |
| If <code class="varname">blocking_map</code> is <code class="constant">CL_TRUE</code>, | |
| <code class="function">clEnqueueSVMMap</code> does not return until the application can | |
| access the contents of the SVM region specified by | |
| <code class="varname">svm_ptr</code> and <code class="varname">size</code> on the host. | |
| </p> | |
| <p> | |
| If <code class="varname">blocking_map</code> is <code class="constant">CL_FALSE</code> | |
| i.e. map operation is non-blocking, the region specified by | |
| <code class="varname">svm_ptr</code> and <code class="varname">size</code> | |
| cannot be used until the map 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 map command. | |
| When the map command is completed, the application | |
| can access the contents of the region | |
| specified by <code class="varname">svm_ptr</code> and | |
| <code class="varname">size</code>. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> | |
| <code class="varname">map_flags</code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| A bit-bield with the following supported values. | |
| </p> | |
| <div class="informaltable"> | |
| <table class="informaltable" border="1"> | |
| <colgroup> | |
| <col align="left" class="col1" /> | |
| <col align="left" class="col2" /> | |
| </colgroup> | |
| <thead> | |
| <tr> | |
| <th align="left">cl_map_flags</th> | |
| <th align="left">Description</th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_MAP_READ</code> | |
| </td> | |
| <td align="left"> | |
| <p> | |
| This flag specifies that the region being mapped in the memory | |
| object is being mapped for reading. | |
| </p> | |
| <p> | |
| The pointer returned by | |
| <code class="function">clEnqueueMap{Buffer|Image}</code> | |
| is guaranteed to contain | |
| the latest bits in the region being | |
| mapped when the | |
| <code class="function">clEnqueueMap{Buffer|Image}</code> | |
| command has completed. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_MAP_WRITE</code> | |
| </td> | |
| <td align="left"> | |
| <p> | |
| This flag specifies that the region being mapped in the memory | |
| object is being mapped for writing. | |
| </p> | |
| <p> | |
| The pointer returned by | |
| <code class="function">clEnqueueMap{Buffer|Image}</code> | |
| is guaranteed to contain the latest bits in | |
| the region being mapped when the | |
| <code class="function">clEnqueueMap{Buffer|Image}</code> | |
| command has completed. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_MAP_WRITE_INVALIDATE_REGION</code> | |
| </td> | |
| <td align="left"> | |
| <p> | |
| This flag specifies that the region being mapped in the memory | |
| object is being mapped for writing. | |
| </p> | |
| <p> | |
| The contents of the region being mapped are to be discarded. | |
| This is typically the case | |
| when the region being mapped is overwritten by the host. This | |
| flag allows the implementation | |
| to no longer guarantee that the pointer returned by | |
| <code class="function">clEnqueueMap{Buffer|Image}</code> | |
| contains the latest bits in the region being | |
| mapped which can be a significant performance enhancement. | |
| </p> | |
| <p> | |
| <code class="constant">CL_MAP_READ</code> or <code class="constant">CL_MAP_WRITE</code> | |
| and <code class="constant"> CL_MAP_WRITE_INVALIDATE_REGION</code> | |
| are mutually exclusive. | |
| </p> | |
| </td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| </div> | |
| </dd> | |
| <dt> | |
| <span class="term"><code class="varname">svm_ptr</code> and <code class="varname">size</code></span> | |
| </dt> | |
| <dd> | |
| <p> | |
| A pointer to a memory region and size in bytes | |
| that will be updated by the | |
| host. If <code class="varname">svm_ptr</code> is allocated using | |
| <a class="citerefentry" href="clSVMAlloc.html"><span class="citerefentry"><span class="refentrytitle">clSVMAlloc</span></span></a> | |
| then it 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> | |
| <code class="varname"> | |
| num_events_in_wait_list | |
| </code> | |
| </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specify events that need to complete before this particular | |
| command can be executed. If <code class="varname">event_wait_list</code> | |
| is NULL, then this particular command 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. | |
| <a class="citerefentry" href="clEnqueueBarrierWithWaitList.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueBarrierWithWaitList</span></span></a> | |
| can be used instead. 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="notes"></a> | |
| <h2>Notes</h2> | |
| <p> | |
| Note that | |
| since we are enqueuing a command with a SVM buffer, the region is already mapped in the host | |
| address space. | |
| </p> | |
| <p> | |
| <a class="citerefentry" href="clEnqueueSVMMap.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueSVMMap</span></span></a>, and | |
| <a class="citerefentry" href="clEnqueueSVMUnmap.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueSVMUnmap</span></span></a> | |
| act as synchronization points for the region | |
| of the SVM buffer specified in these calls. | |
| </p> | |
| </div> | |
| <div class="refsect1"> | |
| <a id="errors"></a> | |
| <h2>Errors</h2> | |
| <p> | |
| <code class="function">clEnqueueSVMMap</code> returns <code class="constant">CL_SUCCESS</code> | |
| 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_VALUE</span> if <code class="varname">svm_ptr</code> is 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 or if values specified in <code class="varname">map_flags</code> are not valid. | |
| </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> > 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 map 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_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.pdf#page=184" 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 © 2007-2015 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> |