mirror of
https://github.com/RGBCube/serenity
synced 2025-05-16 14:44:57 +00:00
1f44cd9dd9
This way we can defer disk writes as long as we like. There's no automatic flushing happening just yet.
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
#pragma once
|
|
|
|
#include "FileSystem.h"
|
|
#include "UnixTypes.h"
|
|
#include <AK/HashMap.h>
|
|
|
|
class SynthFSInode;
|
|
|
|
class SynthFS : public FS {
|
|
public:
|
|
virtual ~SynthFS() override;
|
|
static RetainPtr<SynthFS> create();
|
|
|
|
virtual bool initialize() override;
|
|
virtual const char* class_name() const override;
|
|
virtual InodeIdentifier root_inode() const override;
|
|
virtual bool write_inode(InodeIdentifier, const ByteBuffer&) override;
|
|
virtual InodeMetadata inode_metadata(InodeIdentifier) const override;
|
|
virtual InodeIdentifier create_inode(InodeIdentifier parentInode, const String& name, Unix::mode_t, unsigned size, int& error) override;
|
|
virtual ssize_t read_inode_bytes(InodeIdentifier, Unix::off_t offset, size_t count, byte* buffer, FileDescriptor*) const override;
|
|
virtual InodeIdentifier create_directory(InodeIdentifier parentInode, const String& name, Unix::mode_t, int& error) override;
|
|
virtual InodeIdentifier find_parent_of_inode(InodeIdentifier) const override;
|
|
virtual RetainPtr<Inode> get_inode(InodeIdentifier) const override;
|
|
|
|
protected:
|
|
typedef unsigned InodeIndex;
|
|
|
|
InodeIndex generate_inode_index();
|
|
static constexpr InodeIndex RootInodeIndex = 1;
|
|
|
|
SynthFS();
|
|
|
|
RetainPtr<SynthFSInode> create_directory(String&& name);
|
|
RetainPtr<SynthFSInode> create_text_file(String&& name, ByteBuffer&&, Unix::mode_t = 0010644);
|
|
RetainPtr<SynthFSInode> create_generated_file(String&& name, Function<ByteBuffer()>&&, Unix::mode_t = 0100644);
|
|
|
|
InodeIdentifier add_file(RetainPtr<SynthFSInode>&&, InodeIndex parent = RootInodeIndex);
|
|
bool remove_file(InodeIndex);
|
|
|
|
private:
|
|
InodeIndex m_next_inode_index { 2 };
|
|
HashMap<InodeIndex, RetainPtr<SynthFSInode>> m_inodes;
|
|
};
|
|
|
|
class SynthFSInode final : public Inode {
|
|
friend class SynthFS;
|
|
public:
|
|
virtual ~SynthFSInode() override;
|
|
|
|
private:
|
|
// ^Inode
|
|
virtual ssize_t read_bytes(Unix::off_t, size_t, byte* buffer, FileDescriptor*) override;
|
|
virtual void populate_metadata() const override;
|
|
virtual bool traverse_as_directory(Function<bool(const FS::DirectoryEntry&)>) override;
|
|
virtual InodeIdentifier lookup(const String& name) override;
|
|
virtual String reverse_lookup(InodeIdentifier) override;
|
|
virtual void flush_metadata() override;
|
|
|
|
SynthFS& fs();
|
|
const SynthFS& fs() const;
|
|
SynthFSInode(SynthFS&, unsigned index);
|
|
|
|
String m_name;
|
|
InodeIdentifier m_parent;
|
|
ByteBuffer m_data;
|
|
Function<ByteBuffer()> m_generator;
|
|
Vector<SynthFSInode*> m_children;
|
|
};
|