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https://github.com/mudita/MuditaOS.git
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8818b30d1e
Add support for EMMC hardware partitions to the disk manager Hardware system partitions are visible as <device_name>sys<num> Disk user partitions are visible as <device_name>part<num> Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include <memory>
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#include <string>
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#include <limits>
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#include <purefs/blkdev/defs.hpp>
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namespace purefs::blkdev
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{
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class disk;
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}
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namespace purefs::blkdev::internal
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{
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class disk_handle
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{
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static constexpr part_t no_partition = -1;
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static constexpr auto hw_partition_first = std::numeric_limits<part_t>::max() / 2;
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public:
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static constexpr auto to_syspart_num(part_t part) -> part_t
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{
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return part + hw_partition_first;
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}
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static auto is_any_partition(part_t part) noexcept -> bool
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{
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return part >= 0;
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}
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static auto is_system_partition(part_t part) noexcept -> bool
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{
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return part >= hw_partition_first;
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}
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static auto is_user_partition(part_t part) noexcept -> bool
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{
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return is_any_partition(part) && !is_system_partition(part);
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}
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explicit disk_handle(std::weak_ptr<blkdev::disk> disk, std::string_view name, part_t partition = no_partition)
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: m_disk(disk), m_partition(partition), m_name(name)
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{}
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auto is_any_partition() const noexcept -> bool
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{
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return is_any_partition(m_partition);
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}
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auto is_system_partition() const noexcept -> bool
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{
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return is_system_partition(m_partition);
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}
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auto is_user_partition() const noexcept -> bool
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{
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return is_user_partition(m_partition);
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}
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auto disk() const noexcept
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{
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return m_disk.lock();
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}
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auto partition() const noexcept
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{
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return m_partition;
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}
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auto system_partition() const noexcept -> int
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{
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return (m_partition >= hw_partition_first) ? (m_partition - hw_partition_first + 1) : (0);
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}
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auto sectors() const noexcept -> sector_t;
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auto name() const noexcept
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{
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return m_name;
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}
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private:
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const std::weak_ptr<blkdev::disk> m_disk;
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const part_t m_partition{no_partition};
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mutable sector_t m_sectors{0};
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const std::string m_name;
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};
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} // namespace purefs::blkdev::internal
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