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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019, 2021 Sadie Powell <sadie@witchery.services>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <thread>
class CoreExport Thread
{
private:
/** Whether this thread is in the process of stopping. */
std::atomic_bool stopping = { false };
/** The underlying C++ thread. */
std::thread* thread = nullptr;
/** Internal callback which sets up the thread and calls OnStart.
* @param thread A thread which is starting up.
*/
static void StartInternal(Thread* thread);
protected:
/** Callback which is executed on this thread after it has started. */
virtual void OnStart() = 0;
/** Callback which is executed on the calling thread before this thread is stopped. */
virtual void OnStop() { }
/** Initialises an instance of the Thread class. */
Thread() = default;
public:
/** Destroys an instance of the Thread class. */
virtual ~Thread() = default;
/** Determines whether this thread is currently running. */
bool IsRunning() const { return thread; }
/** Determines whether this thread is currently stopping. */
bool IsStopping() const { return stopping.load(); }
/** Starts the execution of this thread.
* @return True if the thread was started, false if it was already running.
*/
bool Start();
/** Stops the execution of this thread.
* @return True if the thread was stopped, false if it was already stopped.
*/
bool Stop();
};
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