Function xnOSCreateSharedMemoryEx

Source/OpenNI/Win32/Win32SharedMemory.cpp:89–152

}

XN_C_API XnStatus XN_C_DECL xnOSCreateSharedMemoryEx(const XnChar* strName, XnUInt32 nSize, XnUInt32 nAccessFlags, XnBool bAllowOtherUsers, XN_SHARED_MEMORY_HANDLE* phSharedMem)
{
	XnStatus nRetVal = XN_STATUS_OK;
	
	XN_VALIDATE_INPUT_PTR(strName);
	XN_VALIDATE_OUTPUT_PTR(phSharedMem);

	DWORD mapflags;
	nRetVal = AccessFlagsToWin32MapFlags(nAccessFlags, &mapflags);
	XN_IS_STATUS_OK(nRetVal);

	DWORD viewflags;
	nRetVal = AccessFlagsToWin32ViewFlags(nAccessFlags, &viewflags);
	XN_IS_STATUS_OK(nRetVal);

	XnChar strWinName[XN_FILE_MAX_PATH];
	nRetVal = XnWin32CreateKernelObjectName(strWinName, MAX_PATH, strName, bAllowOtherUsers);
	if (nRetVal != XN_STATUS_OK)
	{
		return XN_STATUS_OS_EVENT_CREATION_FAILED;
	}

	SECURITY_ATTRIBUTES* pSecurityAttributes = NULL;
	nRetVal = XnWin32GetSecurityAttributes(bAllowOtherUsers, &pSecurityAttributes);
	if (nRetVal != XN_STATUS_OK)
	{
		return XN_STATUS_OS_EVENT_CREATION_FAILED;
	}

	// allocate handle
	XnOSSharedMemory* pHandle;
	XN_VALIDATE_CALLOC(pHandle, XnOSSharedMemory, 1);

	// create file mapping
	pHandle->hMapFile = CreateFileMapping(
		INVALID_HANDLE_VALUE,    // use paging file
		pSecurityAttributes,     // security 
		mapflags,		         // read/write access
		0,                       // max. object size 
		nSize,                   // buffer size  
		strWinName);             // name of mapping object

	if (pHandle->hMapFile == NULL) 
	{
		XN_LOG_ERROR_RETURN(XN_STATUS_OS_FAILED_TO_CREATE_SHARED_MEMORY, XN_MASK_OS, "Could not create file mapping object (%d).", GetLastError());
	}

	// map it to the process
	pHandle->pAddress = MapViewOfFile(
		pHandle->hMapFile,  // handle to map object
		viewflags,			// read/write permission
		0,                   
		0,                   
		nSize);           

	if (pHandle->pAddress == NULL)
	{
		XN_LOG_ERROR_RETURN(XN_STATUS_OS_FAILED_TO_CREATE_SHARED_MEMORY, XN_MASK_OS, "Could not map view of file (%d).", GetLastError());