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.

smocore/componentThread.cpp

@@ -5,6 +5,7 @@
 #include <boost/asio.hpp>
 #include <opts.h>
 #include <asynchronousContinuation.h>
+#include <callback.h>
 #include <mind.h>
 #include <mindManager/mindManager.h>
 #include <componentThread.h>
@@ -96,8 +97,8 @@ void MindThread::main(MindThread& self)
 		if (sendExceptionInd)
 		{
 			mrntt::mrntt.finalizeReq(
-				std::bind(
-					&mrntt::marionetteFinalizeReqCb, std::placeholders::_1));
+				{nullptr, std::bind(
+				&mrntt::marionetteFinalizeReqCb, std::placeholders::_1)});
 		}
 	}
 
@@ -111,7 +112,7 @@ public:
 	ThreadLifetimeMgmtOp(
 		const std::shared_ptr<ComponentThread> &caller,
 		const std::shared_ptr<MindThread> &target,
-		threadLifetimeMgmtOpCbFn callback)
+		Callback<threadLifetimeMgmtOpCbFn> callback)
 	:	PostedAsynchronousContinuation<threadLifetimeMgmtOpCbFn>(
 			caller, callback),
 	target(target)
@@ -205,7 +206,7 @@ void ComponentThread::cleanup(void)
 	this->keepLooping = false;
 }
 
-void MindThread::joltThreadReq(threadLifetimeMgmtOpCbFn callback)
+void MindThread::joltThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback)
 {
 	/**	EXPLANATION:
 	 * We can't use shared_from_this() here because JOLTing occurs prior to
@@ -241,7 +242,7 @@ void MindThread::joltThreadReq(threadLifetimeMgmtOpCbFn callback)
 }
 
 // Thread management method implementations
-void MindThread::startThreadReq(threadLifetimeMgmtOpCbFn callback)
+void MindThread::startThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback)
 {
 	std::shared_ptr<ComponentThread> caller = getSelf();
 	auto request = std::make_shared<ThreadLifetimeMgmtOp>(
@@ -253,7 +254,7 @@ void MindThread::startThreadReq(threadLifetimeMgmtOpCbFn callback)
 			request.get(), request));
 }
 
-void MindThread::exitThreadReq(threadLifetimeMgmtOpCbFn callback)
+void MindThread::exitThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback)
 {
 	std::shared_ptr<ComponentThread> caller = getSelf();
 	auto request = std::make_shared<ThreadLifetimeMgmtOp>(
@@ -270,7 +271,7 @@ void MindThread::exitThreadReq(threadLifetimeMgmtOpCbFn callback)
 			request.get(), request));
 }
 
-void MindThread::pauseThreadReq(threadLifetimeMgmtOpCbFn callback)
+void MindThread::pauseThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback)
 {
 	if (id == ComponentThread::MRNTT)
 	{
@@ -288,7 +289,7 @@ void MindThread::pauseThreadReq(threadLifetimeMgmtOpCbFn callback)
 			request.get(), request));
 }
 
-void MindThread::resumeThreadReq(threadLifetimeMgmtOpCbFn callback)
+void MindThread::resumeThreadReq(Callback<threadLifetimeMgmtOpCbFn> callback)
 {
 	if (id == ComponentThread::MRNTT)
 	{