Function xnRegisterToModuleStateChange

Source/OpenNI/XnOpenNI.cpp:2993–3015

}

XnStatus xnRegisterToModuleStateChange(XnModuleRegisterStateChangeFuncPtr funcPtr, XnModuleNodeHandle hModuleNode, XnNodeHandle hNode, XnStateChangedHandler handler, void* pCookie, XnCallbackHandle* phCallback)
{
	XnStatus nRetVal = XN_STATUS_OK;
	
	XnModuleStateCookie* pModuleCookie = NULL;
	XN_VALIDATE_CALLOC(pModuleCookie, XnModuleStateCookie, 1);
	pModuleCookie->hNode = hNode;
	pModuleCookie->userHandler = handler;
	pModuleCookie->pUserCookie = pCookie;

	nRetVal = funcPtr(hModuleNode, xnModuleStateChanged, pModuleCookie, &pModuleCookie->hModuleCallback);
	if (nRetVal != XN_STATUS_OK)
	{
		xnOSFree(pModuleCookie);
		return (nRetVal);
	}

	// keep the cookie, so we can free it when node is destroyed
	hNode->pRegistrationCookiesHash->Set(pModuleCookie, pModuleCookie);

	*phCallback = pModuleCookie;
	return (XN_STATUS_OK);
}

void xnUnregisterFromModuleStateChange(XnModuleUnregisterStateChangeFuncPtr funcPtr, XnModuleNodeHandle hModuleNode, XnCallbackHandle hCallback)
{