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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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79 lines
3.4 KiB
C++
79 lines
3.4 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 <stratosphere.hpp>
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namespace ams::ncm {
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class PlaceHolderAccessor {
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private:
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struct CacheEntry {
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PlaceHolderId id;
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fs::FileHandle handle;
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u64 counter;
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};
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static constexpr size_t MaxCacheEntries = 0x2;
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private:
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std::array<CacheEntry, MaxCacheEntries> m_caches;
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PathString *m_root_path;
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u64 m_cur_counter;
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os::SdkMutex m_cache_mutex;
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MakePlaceHolderPathFunction m_make_placeholder_path_func;
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bool m_delay_flush;
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private:
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Result Open(fs::FileHandle *out_handle, PlaceHolderId placeholder_id);
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bool LoadFromCache(fs::FileHandle *out_handle, PlaceHolderId placeholder_id);
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void StoreToCache(PlaceHolderId placeholder_id, fs::FileHandle handle);
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void Invalidate(CacheEntry *entry);
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CacheEntry *FindInCache(PlaceHolderId placeholder_id);
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CacheEntry *GetFreeEntry();;
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public:
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PlaceHolderAccessor() : m_root_path(nullptr), m_cur_counter(0), m_cache_mutex(), m_make_placeholder_path_func(nullptr), m_delay_flush(false) {
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for (size_t i = 0; i < MaxCacheEntries; i++) {
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m_caches[i].id = InvalidPlaceHolderId;
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}
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}
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~PlaceHolderAccessor() { this->InvalidateAll(); }
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static void MakeBaseDirectoryPath(PathString *out, const char *root_path);
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static Result GetPlaceHolderIdFromFileName(PlaceHolderId *out, const char *name);
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public:
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/* API. */
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void Initialize(PathString *root, MakePlaceHolderPathFunction path_func, bool delay_flush) {
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m_root_path = root;
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m_make_placeholder_path_func = path_func;
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m_delay_flush = delay_flush;
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}
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Result CreatePlaceHolderFile(PlaceHolderId placeholder_id, s64 size);
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Result DeletePlaceHolderFile(PlaceHolderId placeholder_id);
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Result WritePlaceHolderFile(PlaceHolderId placeholder_id, s64 offset, const void *buffer, size_t size);
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Result SetPlaceHolderFileSize(PlaceHolderId placeholder_id, s64 size);
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Result TryGetPlaceHolderFileSize(bool *out_found, s64 *out_size, PlaceHolderId placeholder_id);
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void GetPath(PathString *out_placeholder_path, PlaceHolderId placeholder_id);
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void MakePath(PathString *out_placeholder_path, PlaceHolderId placeholder_id) const;
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void InvalidateAll();
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Result EnsurePlaceHolderDirectory(PlaceHolderId placeholder_id);
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size_t GetHierarchicalDirectoryDepth() const { return GetHierarchicalPlaceHolderDirectoryDepth(m_make_placeholder_path_func); }
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};
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}
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