Async: add sh_ptr<ContinuationChainLink> to Callback<>

This change enables us to finally implement the tracing of
continuations backward from the point of acquisition for deadlock
debugging.

commonLibs/livoxProto1/device.h

@@ -13,6 +13,7 @@
 #include <unistd.h>
 #include <boost/asio.hpp>
 #include "protocol.h"
+#include <callback.h>
 
 // Forward declaration
 namespace smo {
@@ -111,13 +112,15 @@ public:
 	typedef std::function<void(bool success)> disconnectReqCbFn;
 
 	// Async connection methods
-	void connectReq(connectReqCbFn callback);
-	void connectToKnownDeviceReq(connectToKnownDeviceReqCbFn callback);
+	void connectReq(smo::Callback<connectReqCbFn> callback);
+	void connectToKnownDeviceReq(
+		smo::Callback<connectToKnownDeviceReqCbFn> callback);
 	void connectByDeviceIdentifierReq(
-		connectByDeviceIdentifierReqCbFn callback);
+		smo::Callback<connectByDeviceIdentifierReqCbFn> callback);
 	void executeHandshakeReq(
-		const std::string& deviceIP, executeHandshakeReqCbFn callback);
-	void disconnectReq(disconnectReqCbFn callback);
+		const std::string& deviceIP,
+		smo::Callback<executeHandshakeReqCbFn> callback);
+	void disconnectReq(smo::Callback<disconnectReqCbFn> callback);
 
 	// Heartbeat state
 	std::unique_ptr<boost::asio::deadline_timer> heartbeatTimer;