event_notifier.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * event_notifier.h - 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 */