/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#pragma once

#include <atomic>
#include <condition_variable>
#include <mutex>

namespace OpenVulkano
{
	class PauseCV final
	{
		std::mutex m_mutex;
		std::condition_variable m_condVar;
		std::atomic_bool m_paused = false;
		std::atomic_bool m_isSleeping = false;

	public:
		void Pause() { m_paused = true; }

		void Resume()
		{
			{
				std::unique_lock lock(m_mutex);
				m_paused = false;
			}
			m_condVar.notify_all();
		}

		void Check()
		{
			while (m_paused)
			{
				m_isSleeping = true;
				std::unique_lock l(m_mutex);
				m_condVar.wait(l, [this]{ return !m_paused; });
			}
			m_isSleeping = false;
		}

		bool IsSleeping() const { return m_isSleeping; }
	};
}