DeluxeAgent.cpp
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DeluxeAgent.cpp
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	//===-- deluxe/DeluxeAgent.cpp ----------------------------------- C++ --===//
	//
	// The RoSA Framework
	//
	//===----------------------------------------------------------------------===//
	///
	/// \file deluxe/DeluxeAgent.cpp
	///
	/// \author David Juhasz (david.juhasz@tuwien.ac.at)
	///
	/// \date 2017-2019
	///
	/// \brief Implementation of rosa/deluxe/DeluxeAgent.hpp.
	///
	//===----------------------------------------------------------------------===//

	#include "rosa/deluxe/DeluxeAgent.hpp"

	#include "rosa/deluxe/DeluxeSensor.hpp"

	#include <algorithm>

	namespace rosa {
	namespace deluxe {

	bool DeluxeAgent::inv(void) const noexcept {
	// Check container sizes.
	if (!(InputTypes.size() == NumberOfInputs &&
	InputChanged.size() == NumberOfInputs &&
	InputValues->size() == NumberOfInputs &&
	Slaves.size() == NumberOfInputs)) {
	return false;
	}

	// Check slave types and validate slave registrations and reverse lookup
	// information.
	std::map<id_t, size_t> RefIds; // Build up a reference of SlaveIds in this.
	for (size_t I = 0; I < NumberOfInputs; ++I) {
	// First, validate input types at position \c I.
	const TypeNumber T = InputTypes[I];

	if (InputValues->typeAt(I) != T) {
	return false;
	}

	// Check the registered slave at position \c I.
	const auto &Slave = Slaves[I];
	// If \c Slave is empty, nothing to check.
	if (!Slave)
	continue;

	// \c Slave is not empty here.
	// Check the `OutputType` of the registered slave.
	const auto &A = unwrapAgent(*Slave);
	if (!((A.Kind == atoms::SensorKind &&
	static_cast<const DeluxeSensor &>(A).OutputType == T) \|\|
	(A.Kind == atoms::AgentKind &&
	static_cast<const DeluxeAgent &>(A).OutputType == T))) {
	return false;
	}

	// Validate that the slave is not registered more than once.
	if (std::any_of(
	Slaves.begin() + I + 1, Slaves.end(),
	[&Slave](const Optional<AgentHandle> &O) { return O && Slave == O; })) {
	return false;
	}

	// Build the content of \c RefIds.
	RefIds.emplace(A.Id, I);
	}

	// Validate slave reverse lookup information against our reference.
	if (RefIds != SlaveIds) {
	return false;
	}

	// All checks were successful, the invariant is held.
	return true;
	}

	DeluxeAgent::~DeluxeAgent(void) noexcept {
	ASSERT(inv());
	LOG_TRACE("Destroying DeluxeAgent...");

	// Make sure \p this object is not a registered slave.
	if (Master) {
	ASSERT(unwrapAgent(*Master).Kind == atoms::AgentKind); // Sanity check.
	DeluxeAgent &M = static_cast<DeluxeAgent&>(unwrapAgent(*Master));
	ASSERT(M.positionOfSlave(self()) != M.NumberOfInputs); // Sanity check.
	M.registerSlave(M.positionOfSlave(self()), {});
	Master = {};
	}

	// Also, make sure \p this object is no acting master.
	for (size_t Pos = 0; Pos < NumberOfInputs; ++Pos) {
	registerSlave(Pos, {});
	}

	// Now there is no connection with other entities, safe to destroy.
	}

	Optional<AgentHandle> DeluxeAgent::master(void) const noexcept {
	ASSERT(inv());
	return Master;
	}

	void DeluxeAgent::registerMaster(const Optional<AgentHandle> _Master) noexcept {
	ASSERT(inv() && (!_Master \|\| unwrapAgent(*_Master).Kind == atoms::AgentKind));

	Master = _Master;

	ASSERT(inv());
	}

	TypeNumber DeluxeAgent::inputType(const size_t Pos) const noexcept {
	ASSERT(inv() && Pos < NumberOfInputs);
	return InputTypes[Pos];
	}

	Optional<AgentHandle> DeluxeAgent::slave(const size_t Pos) const noexcept {
	ASSERT(inv() && Pos < NumberOfInputs);
	return Slaves[Pos];
	}

	void DeluxeAgent::registerSlave(const size_t Pos,
	const Optional<AgentHandle> Slave) noexcept {
	ASSERT(inv() && Pos < NumberOfInputs &&
	(!Slave \|\|
	(unwrapAgent(*Slave).Kind == atoms::SensorKind &&
	static_cast<const DeluxeSensor &>(unwrapAgent(*Slave)).OutputType ==
	InputTypes[Pos]) \|\|
	(unwrapAgent(*Slave).Kind == atoms::AgentKind &&
	static_cast<const DeluxeAgent &>(unwrapAgent(*Slave)).OutputType ==
	InputTypes[Pos])));

	// If registering an actual slave, not just clearing the slot, make sure
	// the same slave is not registered to another slot.
	if (Slave) {
	auto It = SlaveIds.find(unwrapAgent(*Slave).Id);
	if (It != SlaveIds.end()) {
	Slaves[It->second] = {};//Optional<AgentHandle>();
	SlaveIds.erase(It);
	}
	}

	// Obtain the place whose content is to be replaced with \p Slave
	auto &OldSlave = Slaves[Pos];

	// If there is already a slave registered at \p Pos, clear reverse lookup
	// information for it, and make sure it no longer has \p this object as
	// master.
	if (OldSlave) {
	auto &A = unwrapAgent(*OldSlave);
	ASSERT(SlaveIds.find(A.Id) != SlaveIds.end()); // Sanity check.
	SlaveIds.erase(A.Id);

	if (A.Kind == atoms::AgentKind) {
	static_cast<DeluxeAgent &>(A).registerMaster({});
	} else {
	ASSERT(A.Kind == atoms::SensorKind); // Sanity check.
	static_cast<DeluxeSensor &>(A).registerMaster({});
	}
	}

	// Register \p Slave at \p Pos.
	OldSlave = Slave;

	// If registering an actual slave, not just clearing the slot, register
	// reverse lookup information for the new slave.
	if (Slave) {
	SlaveIds.emplace(unwrapAgent(*Slave).Id, Pos);
	}

	ASSERT(inv());
	}

	size_t DeluxeAgent::positionOfSlave(const AgentHandle Slave) const noexcept {
	ASSERT(inv());

	bool Found = false;
	size_t Pos = 0;
	while (!Found && Pos < NumberOfInputs) {
	auto &ExistingSlave = Slaves[Pos];
	if (ExistingSlave && *ExistingSlave == Slave) {
	Found = true;
	} else {
	++Pos;
	}
	}
	ASSERT(Found \|\| Pos == NumberOfInputs); // Sanity check.

	return Pos;
	}

	void DeluxeAgent::handleTrigger(atoms::Trigger) noexcept {
	ASSERT(inv());

	FP();

	ASSERT(inv());
	}

	} // End namespace deluxe
	} // End namespace rosa

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