1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <map>
#include <mutex>
#include <optional>
#include <string_view>
#include "common/intrusive_list.h"
#include "core/file_sys/mode.h"
#include "core/file_sys/vfs.h"
namespace Common::FS {
class IOFile;
}
namespace FileSys {
struct FileReference : public Common::IntrusiveListBaseNode<FileReference> {
std::shared_ptr<Common::FS::IOFile> file{};
};
class RealVfsFile;
class RealVfsDirectory;
class RealVfsFilesystem : public VfsFilesystem {
public:
RealVfsFilesystem();
~RealVfsFilesystem() override;
std::string GetName() const override;
bool IsReadable() const override;
bool IsWritable() const override;
VfsEntryType GetEntryType(std::string_view path) const override;
VirtualFile OpenFile(std::string_view path, Mode perms = Mode::Read) override;
VirtualFile CreateFile(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualFile CopyFile(std::string_view old_path, std::string_view new_path) override;
VirtualFile MoveFile(std::string_view old_path, std::string_view new_path) override;
bool DeleteFile(std::string_view path) override;
VirtualDir OpenDirectory(std::string_view path, Mode perms = Mode::Read) override;
VirtualDir CreateDirectory(std::string_view path, Mode perms = Mode::ReadWrite) override;
VirtualDir CopyDirectory(std::string_view old_path, std::string_view new_path) override;
VirtualDir MoveDirectory(std::string_view old_path, std::string_view new_path) override;
bool DeleteDirectory(std::string_view path) override;
private:
using ReferenceListType = Common::IntrusiveListBaseTraits<FileReference>::ListType;
std::map<std::string, std::weak_ptr<VfsFile>, std::less<>> cache;
ReferenceListType open_references;
ReferenceListType closed_references;
std::mutex list_lock;
size_t num_open_files{};
private:
friend class RealVfsFile;
std::unique_lock<std::mutex> RefreshReference(const std::string& path, Mode perms,
FileReference& reference);
void DropReference(std::unique_ptr<FileReference>&& reference);
private:
friend class RealVfsDirectory;
VirtualFile OpenFileFromEntry(std::string_view path, std::optional<u64> size,
Mode perms = Mode::Read);
private:
void EvictSingleReferenceLocked();
void InsertReferenceIntoListLocked(FileReference& reference);
void RemoveReferenceFromListLocked(FileReference& reference);
};
// An implementation of VfsFile that represents a file on the user's computer.
class RealVfsFile : public VfsFile {
friend class RealVfsDirectory;
friend class RealVfsFilesystem;
public:
~RealVfsFile() override;
std::string GetName() const override;
std::size_t GetSize() const override;
bool Resize(std::size_t new_size) override;
VirtualDir GetContainingDirectory() const override;
bool IsWritable() const override;
bool IsReadable() const override;
std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override;
std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override;
bool Rename(std::string_view name) override;
private:
RealVfsFile(RealVfsFilesystem& base, std::unique_ptr<FileReference> reference,
const std::string& path, Mode perms = Mode::Read, std::optional<u64> size = {});
RealVfsFilesystem& base;
std::unique_ptr<FileReference> reference;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
std::optional<u64> size;
Mode perms;
};
// An implementation of VfsDirectory that represents a directory on the user's computer.
class RealVfsDirectory : public VfsDirectory {
friend class RealVfsFilesystem;
public:
~RealVfsDirectory() override;
VirtualFile GetFileRelative(std::string_view relative_path) const override;
VirtualDir GetDirectoryRelative(std::string_view relative_path) const override;
VirtualFile GetFile(std::string_view name) const override;
VirtualDir GetSubdirectory(std::string_view name) const override;
VirtualFile CreateFileRelative(std::string_view relative_path) override;
VirtualDir CreateDirectoryRelative(std::string_view relative_path) override;
bool DeleteSubdirectoryRecursive(std::string_view name) override;
std::vector<VirtualFile> GetFiles() const override;
FileTimeStampRaw GetFileTimeStamp(std::string_view path) const override;
std::vector<VirtualDir> GetSubdirectories() const override;
bool IsWritable() const override;
bool IsReadable() const override;
std::string GetName() const override;
VirtualDir GetParentDirectory() const override;
VirtualDir CreateSubdirectory(std::string_view name) override;
VirtualFile CreateFile(std::string_view name) override;
bool DeleteSubdirectory(std::string_view name) override;
bool DeleteFile(std::string_view name) override;
bool Rename(std::string_view name) override;
std::string GetFullPath() const override;
std::map<std::string, VfsEntryType, std::less<>> GetEntries() const override;
private:
RealVfsDirectory(RealVfsFilesystem& base, const std::string& path, Mode perms = Mode::Read);
template <typename T, typename R>
std::vector<std::shared_ptr<R>> IterateEntries() const;
RealVfsFilesystem& base;
std::string path;
std::string parent_path;
std::vector<std::string> path_components;
Mode perms;
};
} // namespace FileSys
|
