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<a class="anchor" name="ga682d4aea57e8adb6c72330b78900616"></a><!-- doxytag: member="cuda_runtime_api.h::cudaIpcGetMemHandle" ref="ga682d4aea57e8adb6c72330b78900616" args="(cudaIpcMemHandle_t *handle, void *devPtr)" -->
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          <td class="paramtype">cudaIpcMemHandle_t *&nbsp;</td>
          <td class="paramname"> <em>handle</em>, </td>
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          <td class="paramtype">void *&nbsp;</td>
          <td class="paramname"> <em>devPtr</em></td><td>&nbsp;</td>
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<p>
/brief Gets an interprocess memory handle for an existing device memory allocation<p>
Takes a pointer to the base of an existing device memory allocation created with cudaMemAlloc and exports it for use in another process. This is a lightweight operation and may be called multiple times on an allocation without adverse effects.<p>
If a region of memory is freed with cudaMemFree and a subsequent call to cudaMemAlloc returns memory with the same device address, <a class="el" href="group__CUDART__DEVICE_ga682d4aea57e8adb6c72330b78900616.html#ga682d4aea57e8adb6c72330b78900616">cudaIpcGetMemHandle</a> will return a unique handle for the new memory.<p>
IPC functionality is restricted to devices with support for unified addressing on Linux operating systems.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>handle</em>&nbsp;</td><td>- Pointer to user allocated cudaIpcMemHandle to return the handle in. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>devPtr</em>&nbsp;</td><td>- Base pointer to previously allocated device memory</td></tr>
  </table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd><a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038e355f04607d824883b4a50662830d591">cudaSuccess</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038c4673247aee4d1ab8d07871f376e0273">cudaErrorInvalidResourceHandle</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038f210f50ae7f17f655e0504929606add9">cudaErrorMemoryAllocation</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038a2625b63c0940c54ed07f2986b12e0f1">cudaErrorMapBufferObjectFailed</a>,</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd>cudaMemAlloc, cudaMemFree, <a class="el" href="group__CUDART__DEVICE_g7d2e89a1b53fc087fafdded0aaf29062.html#g7d2e89a1b53fc087fafdded0aaf29062" title="Gets an interprocess handle for a previously allocated event.">cudaIpcGetEventHandle</a>, <a class="el" href="group__CUDART__DEVICE_ge9e71d935c23a5349e458a3a143925ea.html#ge9e71d935c23a5349e458a3a143925ea" title="Opens an interprocess event handle for use in the current process.">cudaIpcOpenEventHandle</a>, <a class="el" href="group__CUDART__DEVICE_g12ff06c07a4d4134f0eefbd5cf3ba216.html#g12ff06c07a4d4134f0eefbd5cf3ba216">cudaIpcOpenMemHandle</a>, <a class="el" href="group__CUDART__DEVICE_g96302370e5c325b212378b04a536ac26.html#g96302370e5c325b212378b04a536ac26">cudaIpcCloseMemHandle</a> </dd></dl>

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