Async: add TargetedContinuation

This class enables us to consistently represent continuations
that are intended to be posted on a particular target handling
thread. It hols a sh_ptr to the caller so that the target thread
can re-enqueue the response on the caller after processing the
REQ/IND op.

commonLibs/livoxProto1/core.cpp

@@ -72,7 +72,7 @@ std::optional<std::shared_ptr<Device>> DeviceManager::getDevice(
 
 // GetOrCreateDeviceReq nested class implementation
 class DeviceManager::GetOrCreateDeviceReq
-:	public AsynchronousContinuation<livoxProto1_getOrCreateDeviceReqCbFn>
+:	public smo::AsynchronousContinuation<livoxProto1_getOrCreateDeviceReqCbFn>
 {
 public:
 	DeviceManager& deviceManager;
@@ -84,7 +84,8 @@ public:
 		DeviceManager& mgr,
 		std::shared_ptr<Device> device,
 		livoxProto1_getOrCreateDeviceReqCbFn cb)
-	:	AsynchronousContinuation(std::move(cb)),
+	:	smo::AsynchronousContinuation<
+			livoxProto1_getOrCreateDeviceReqCbFn>(std::move(cb)),
 	deviceManager(mgr), pendingDevice(device)
 	{}
 
@@ -175,9 +176,9 @@ void DeviceManager::getOrCreateDeviceReq(
 }
 
 class DeviceManager::DestroyDeviceReq
-:	public AsynchronousContinuation<livoxProto1_destroyDeviceReqCbFn>
+:	public smo::AsynchronousContinuation<livoxProto1_destroyDeviceReqCbFn>
 {
-	public:
+public:
 	DeviceManager& deviceManager;
 	std::shared_ptr<Device> pendingDevice;
 
@@ -186,7 +187,8 @@ public:
 		DeviceManager& mgr,
 		std::shared_ptr<Device> device,
 		livoxProto1_destroyDeviceReqCbFn cb)
-	:	AsynchronousContinuation(std::move(cb)),
+	:	smo::AsynchronousContinuation<
+			livoxProto1_destroyDeviceReqCbFn>(std::move(cb)),
 	deviceManager(mgr), pendingDevice(device)
 	{}