event_notifier.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * File descriptor event notifier
 */

#pragma once

#include <libcamera/base/private.h>

#include <libcamera/base/object.h>
#include <libcamera/base/signal.h>

namespace libcamera {

class Message;

class EventNotifier : public Object
{
public:
    enum Type {
        Read,
        Write,
        Exception,
    };

    EventNotifier(int fd, Type type, Object *parent = nullptr);
    virtual ~EventNotifier();

    Type type() const { return type_; }
    int fd() const { return fd_; }

    bool enabled() const { return enabled_; }
    void setEnabled(bool enable);

    Signal<> activated;

protected:
    void message(Message *msg) override;

private:
    int fd_;
    Type type_;
    bool enabled_;
};

} /* namespace libcamera */