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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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82 lines
3.1 KiB
C++
82 lines
3.1 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours.hpp>
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#include <stratosphere/os.hpp>
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#include <stratosphere/fs/fs_istorage.hpp>
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#include <stratosphere/fs/fs_substorage.hpp>
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#include <stratosphere/fs/fs_i_buffer_manager.hpp>
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namespace ams::fssystem {
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/* ACCURATE_TO_VERSION: Unknown */
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class BufferedStorage : public ::ams::fs::IStorage {
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NON_COPYABLE(BufferedStorage);
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NON_MOVEABLE(BufferedStorage);
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private:
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class Cache;
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class UniqueCache;
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class SharedCache;
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private:
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fs::SubStorage m_base_storage;
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fs::IBufferManager *m_buffer_manager;
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size_t m_block_size;
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s64 m_base_storage_size;
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std::unique_ptr<Cache[]> m_caches;
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s32 m_cache_count;
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Cache *m_next_acquire_cache;
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Cache *m_next_fetch_cache;
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os::SdkMutex m_mutex;
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bool m_bulk_read_enabled;
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public:
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BufferedStorage();
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virtual ~BufferedStorage();
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Result Initialize(fs::SubStorage base_storage, fs::IBufferManager *buffer_manager, size_t block_size, s32 buffer_count);
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void Finalize();
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bool IsInitialized() const { return m_caches != nullptr; }
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virtual Result Read(s64 offset, void *buffer, size_t size) override;
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virtual Result Write(s64 offset, const void *buffer, size_t size) override;
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virtual Result GetSize(s64 *out) override;
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virtual Result SetSize(s64 size) override;
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virtual Result Flush() override;
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virtual Result OperateRange(void *dst, size_t dst_size, fs::OperationId op_id, s64 offset, s64 size, const void *src, size_t src_size) override;
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using IStorage::OperateRange;
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void InvalidateCaches();
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fs::IBufferManager *GetBufferManager() const { return m_buffer_manager; }
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void EnableBulkRead() { m_bulk_read_enabled = true; }
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private:
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Result PrepareAllocation();
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Result ControlDirtiness();
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Result ReadCore(s64 offset, void *buffer, size_t size);
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bool ReadHeadCache(s64 *offset, void *buffer, size_t *size, s64 *buffer_offset);
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bool ReadTailCache(s64 offset, void *buffer, size_t *size, s64 buffer_offset);
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Result BulkRead(s64 offset, void *buffer, size_t size, bool head_cache_needed, bool tail_cache_needed);
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Result WriteCore(s64 offset, const void *buffer, size_t size);
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};
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}
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