Suspendable.h

// -----------------------------------------------------------------------------
// This file is part of VirtualC64
//
// Copyright (C) Dirk W. Hoffmann. www.dirkwhoffmann.de
// This FILE is dual-licensed. You are free to choose between:
//
//     - The GNU General Public License v3 (or any later version)
//     - The Mozilla Public License v2
//
// SPDX-License-Identifier: GPL-3.0-or-later OR MPL-2.0
// -----------------------------------------------------------------------------
 
#pragma once
 
#include <cstdio>
 
namespace vc64 {
 
class Suspendable {
 
public:
    
    Suspendable() { }
    virtual ~Suspendable() = default;
 
    virtual void suspend() = 0;
 
    virtual void resume() = 0;
};
 
struct AutoResume {
 
    Suspendable *s;
    AutoResume(Suspendable *s) : s(s) { s->suspend(); }
    ~AutoResume() { s->resume(); }
};
 
#define SUSPENDED AutoResume _ar(this);
 
}