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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Inkscape::Debug::EventTracker - semi-automatically track event lifetimes
*
* Authors:
* MenTaLguY <mental@rydia.net>
*
* Copyright (C) 2005 MenTaLguY
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifndef SEEN_INKSCAPE_DEBUG_EVENT_TRACKER_H
#define SEEN_INKSCAPE_DEBUG_EVENT_TRACKER_H
#include "debug/logger.h"
namespace Inkscape {
namespace Debug {
#ifdef NDEBUG
// Make event tracking a no-op for non-debug builds
template <typename = void> struct EventTracker {
template <typename... Args> EventTracker(Args &&...) {}
template <typename, typename... Args> void set(Args &&...) {}
void clear() {}
};
#else
struct NoInitialEvent {};
template <typename Event=NoInitialEvent> class EventTracker;
class EventTrackerBase {
public:
virtual ~EventTrackerBase() {
if (_active) {
Logger::finish();
}
}
template <typename EventType, typename... Args>
inline void set(Args&&... args) {
if (_active) {
Logger::finish();
}
Logger::start<EventType>(std::forward<Args>(args)...);
_active = true;
}
void clear() {
if (_active) {
Logger::finish();
_active = false;
}
}
protected:
EventTrackerBase(bool active) : _active(active) {}
private:
EventTrackerBase(EventTrackerBase const &) = delete; // no copy
void operator=(EventTrackerBase const &) = delete; // no assign
bool _active;
};
template <typename EventType> class EventTracker : public EventTrackerBase {
public:
template <typename... Args>
EventTracker(Args&&... args) : EventTrackerBase(true) {
Logger::start<EventType>(std::forward<Args>(args)...);
}
};
template <> class EventTracker<NoInitialEvent> : public EventTrackerBase {
public:
EventTracker() : EventTrackerBase(false) {}
};
#endif
}
}
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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