mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-25 17:10:23 +00:00
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* 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/Devices/Device.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class BlockDevice : public Device {
|
|
public:
|
|
virtual ~BlockDevice() override;
|
|
|
|
size_t block_size() const { return m_block_size; }
|
|
virtual bool is_seekable() const override { return true; }
|
|
|
|
bool read_block(unsigned index, UserOrKernelBuffer&) const;
|
|
bool write_block(unsigned index, const UserOrKernelBuffer&);
|
|
|
|
virtual bool read_blocks(unsigned index, u16 count, UserOrKernelBuffer&) = 0;
|
|
virtual bool write_blocks(unsigned index, u16 count, const UserOrKernelBuffer&) = 0;
|
|
|
|
protected:
|
|
BlockDevice(unsigned major, unsigned minor, size_t block_size = PAGE_SIZE)
|
|
: Device(major, minor)
|
|
, m_block_size(block_size)
|
|
{
|
|
}
|
|
|
|
private:
|
|
virtual bool is_block_device() const final { return true; }
|
|
|
|
size_t m_block_size { 0 };
|
|
};
|
|
|
|
}
|