/*
 * Copyright (c) 2021, the SerenityOS developers
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <Kernel/Lock.h>
#include <Kernel/Storage/StorageDevice.h>

namespace Kernel {

class RamdiskController;

class RamdiskDevice final : public StorageDevice {
    friend class RamdiskController;
    AK_MAKE_ETERNAL
public:
    static NonnullRefPtr<RamdiskDevice> create(const RamdiskController&, OwnPtr<Region>&& region, int major, int minor);
    RamdiskDevice(const RamdiskController&, OwnPtr<Region>&&, int major, int minor);
    virtual ~RamdiskDevice() override;

    // ^StorageDevice
    virtual Type type() const override { return StorageDevice::Type::Ramdisk; }
    virtual size_t max_addressable_block() const override;

    // ^BlockDevice
    virtual void start_request(AsyncBlockDeviceRequest&) override;

    // ^DiskDevice
    virtual const char* class_name() const override;
    virtual String device_name() const override;

    bool is_slave() const;

    Lock m_lock { "RamdiskDevice" };

    OwnPtr<Region> m_region;
};

}