SerialAsyncContin/LockSet: add releaseQutexEarly()

This method allows us to avoid double-release()ing qutexes when we
want to release a qutex early. If we don't use releaseQutexEarly(),
then inside of callOriginalCb when LockSet::release is called, the
Qutex will be release()d a second time.

include/serializedAsynchronousContinuation.h

@@ -43,6 +43,13 @@ public:
 	std::unique_ptr<std::forward_list<std::reference_wrapper<Qutex>>>
 	getAcquiredQutexHistory() const;
 
+	/**
+	 * @brief Release a specific qutex early
+	 * @param qutex The qutex to release early
+	 */
+	void releaseQutexEarly(Qutex &qutex)
+		{ requiredLocks.releaseQutexEarly(qutex); }
+
 public:
 	LockSet<OriginalCbFnT> requiredLocks;
 	std::atomic<bool> isAwakeOrBeingAwakened{false};
@@ -109,7 +116,7 @@ public:
 		getLockvokerIteratorForQutex(Qutex& qutex) const override
 		{
 			return serializedContinuation.requiredLocks.getLockUsageDesc(
-				qutex).second;
+				qutex).iterator;
 		}
 
 		/**
@@ -133,7 +140,7 @@ public:
 		Qutex& getLockAt(size_t index) const override
 		{
 			return serializedContinuation.requiredLocks.locks[index]
-				.first.get();
+				.qutex.get();
 		}
 
 	private:
@@ -211,9 +218,9 @@ public:
 				: serializedContinuation.requiredLocks.locks)
 			{
 				if (traceContinuationHistoryForDeadlockOn(
-					lockUsageDesc.first.get()))
+					lockUsageDesc.qutex.get()))
 				{
-					return std::ref(lockUsageDesc.first.get());
+					return std::ref(lockUsageDesc.qutex.get());
 				}
 			}
 			return std::nullopt;
@@ -289,7 +296,7 @@ const
 		// Add this continuation's locks to the held locks list
 		for (size_t i = 0; i < serializedCont->requiredLocks.locks.size(); ++i)
 		{
-			heldLocks->push_front(serializedCont->requiredLocks.locks[i].first);
+			heldLocks->push_front(serializedCont->requiredLocks.locks[i].qutex);
 		}
 	}