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/************************************************************************
*
* Copyright (C) 2009-2024 IRCAD France
* Copyright (C) 2012-2019 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#pragma once
#define FWCOM_SLOTCONNECTION_HPP
#include "core/com/slot_base.hpp"
#include "core/com/slot_connection_base.hpp"
namespace sight::core::com
{
template<typename F>
struct signal;
template<typename F>
struct slot_connection;
/**
* @brief Slot connection implementation.
* This class is for internal use purpose.
*/
template<typename ... A>
struct SIGHT_CORE_CLASS_API slot_connection<void(A ...)>: slot_connection_base
{
/**
* @name Typedefs
* @{ */
using signature_type = void (A ...);
using self_t = slot_connection<signature_type>;
using sptr = std::shared_ptr<self_t>;
using signal_type = signal<signature_type>;
using signal_sptr_type = std::shared_ptr<signal_type>;
using signal_wptr_type = std::weak_ptr<signal_type>;
using slot_wrapper_type = slot_run<signature_type>;
using slot_wrapper_sptr_type = std::shared_ptr<slot_wrapper_type>;
using slot_run_type = slot_run<signature_type>;
using slot_run_sptr_type = std::shared_ptr<slot_run_type>;
using pair_type = std::pair<bool, std::weak_ptr<slot_run_type> >;
/** @} */
/// Disconnect the related slot.
void disconnect() override;
~slot_connection() override;
/// Build a new connection with the given signal and slot.
slot_connection(const signal_sptr_type& _signal, const slot_run_sptr_type& _slot);
/// Build a new connection with the given signal, slot and wrapper.
slot_connection(
const signal_sptr_type& _signal,
const SPTR(slot_base)& _slot,
const slot_wrapper_sptr_type& _slot_wrapper
);
protected:
template<typename F>
friend struct signal;
/// Connect the related Signal and Slot together.
void connect_no_lock() override;
/// *NOT THREAD SAFE* Disconnect the related signal.
void disconnect_signal_no_lock(const signal_sptr_type& _sig);
/// *NOT THREAD SAFE* Disconnect the related slot.
void disconnect_slot_no_lock(const SPTR(slot_base)& _slot);
/// *NOT THREAD SAFE* Disconnect the related slot and signal.
void disconnect_weak_lock() override;
/**
* @brief Returns a blocker on the connection.
* The connection is blocked until the returned shared pointer dies.
*/
slot_connection_base::blocker_sptr_type get_blocker() override;
/// Unblock this connection.
void unblock();
/// Related Signal.
signal_wptr_type m_signal;
/// Related Slot.
WPTR(slot_base) m_connected_slot;
/// Slot wrapper.
SPTR(slot_base) m_slot_wrapper;
/**
* @brief Associates state of this connection to related Slot.
* If m_pair.first is false, the connection is blocked.
*/
pair_type m_pair;
/// Connection blocker.
slot_connection_base::blocker_wptr_type m_weak_blocker;
mutable core::mt::read_write_mutex m_mutex;
};
} // namespace sight::core::com
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