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AgentHandle.hpp
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/*******************************************************************************
*
* File: AgentHandle.hpp
*
* Contents: Declaration of AgentHandle.
*
* Copyright 2017
*
* Author: David Juhasz (david.juhasz@tuwien.ac.at)
*
******************************************************************************/
#ifndef ROSA_CORE_AGENTHANDLE_HPP
#define ROSA_CORE_AGENTHANDLE_HPP
#include "rosa/core/AbstractAgent.hpp"
namespace rosa {
// Wraps an actual Agent to decouple its public interface.
// NOTE: Such decoupling might be necessary when operating with remote
// Systems, sometime in the future.
class AgentHandle : public AbstractAgent<AgentHandle> {
// Agent and MessagingSystem are our friends, they may inspect the
// private member fields of the class.
friend class Agent;
friend class MessagingSystem;
// The wrapped Agent instance.
Agent &A;
// The owning MessagingSystem of A.
MessagingSystem &S;
// Ctor used by Agents creating a reference to itself during construction.
// NOTE: The state of the Agent is not validated by this constructor.
AgentHandle(Agent &A, bool);
public:
// Public ctor for normal use.
// NOTE: The Agent must be in a valid state to create an AgentHandle with.
// PRE: A.system().isUnitRegistered(A)
AgentHandle(Agent &A);
// Dtor, nothing to take care of.
~AgentHandle(void) = default;
// Tells if the AgentHandle is valid, referring to an existing Agent.
// NOTE: AgentHandlers belong to MessagingSystems. Working with an
// AgentHandler whose originating MessagingSystem has already been destroyed
// results in undefined behavior.
operator bool(void) const noexcept override;
// Tells if the given reference refers to this Agent.
bool operator==(const AgentHandle &H) const noexcept override;
// Returns a reference to this Agent.
AgentHandle self(void) noexcept override;
// Sends the given Message to this Agent.
// PRE: bool(*this)
void sendMessage(message_t &&M) noexcept override;
};
} // End namespace rosa
#endif // ROSA_CORE_AGENTHANDLE_HPP

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