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vfs_real: add simplified open file cache

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This commit is contained in:
Liam 2023-06-13 17:16:10 -04:00
parent 0e7eaaba5a
commit dbbe237668
2 changed files with 18 additions and 1 deletions
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17
src/core/file_sys/vfs_real.cpp
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@ -75,14 +75,26 @@ VfsEntryType RealVfsFilesystem::GetEntryType(std::string_view path_) const {
VirtualFile RealVfsFilesystem::OpenFile(std::string_view path_, Mode perms) {
const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
if (auto it = cache.find(path); it != cache.end()) {
if (auto file = it->second.lock(); file) {
return file;
}
}
auto reference = std::make_unique<FileReference>();
this->InsertReferenceIntoList(*reference);
return std::shared_ptr<RealVfsFile>(new RealVfsFile(*this, std::move(reference), path, perms));
auto file =
std::shared_ptr<RealVfsFile>(new RealVfsFile(*this, std::move(reference), path, perms));
cache[path] = file;
return file;
}
VirtualFile RealVfsFilesystem::CreateFile(std::string_view path_, Mode perms) {
const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
cache.erase(path);
// Current usages of CreateFile expect to delete the contents of an existing file.
if (FS::IsFile(path)) {
FS::IOFile temp{path, FS::FileAccessMode::Write, FS::FileType::BinaryFile};
@ -111,6 +123,8 @@ VirtualFile RealVfsFilesystem::CopyFile(std::string_view old_path_, std::string_
VirtualFile RealVfsFilesystem::MoveFile(std::string_view old_path_, std::string_view new_path_) {
const auto old_path = FS::SanitizePath(old_path_, FS::DirectorySeparator::PlatformDefault);
const auto new_path = FS::SanitizePath(new_path_, FS::DirectorySeparator::PlatformDefault);
cache.erase(old_path);
cache.erase(new_path);
if (!FS::RenameFile(old_path, new_path)) {
return nullptr;
}
@ -119,6 +133,7 @@ VirtualFile RealVfsFilesystem::MoveFile(std::string_view old_path_, std::string_
bool RealVfsFilesystem::DeleteFile(std::string_view path_) {
const auto path = FS::SanitizePath(path_, FS::DirectorySeparator::PlatformDefault);
cache.erase(path);
return FS::RemoveFile(path);
}

2
src/core/file_sys/vfs_real.h
View file

@ -3,6 +3,7 @@
#pragma once
#include <map>
#include <string_view>
#include "common/intrusive_list.h"
#include "core/file_sys/mode.h"
@ -41,6 +42,7 @@ public:
private:
using ReferenceListType = Common::IntrusiveListBaseTraits<FileReference>::ListType;
std::map<std::string, std::weak_ptr<VfsFile>, std::less<>> cache;
ReferenceListType open_references;
ReferenceListType closed_references;
size_t num_open_files{};