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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_LEVELDB_ENV_MOJO_H_
#define COMPONENTS_LEVELDB_ENV_MOJO_H_
#include "components/filesystem/public/interfaces/directory.mojom.h"
#include "components/leveldb/leveldb_mojo_proxy.h"
#include "third_party/leveldatabase/env_chromium.h"
#include "third_party/leveldatabase/src/include/leveldb/env.h"
namespace leveldb {
// An implementation of the leveldb operating system interaction code which
// proxies to a specified mojo:filesystem directory. Most of these methods are
// synchronous and block on responses from the filesystem service. That's fine
// since, for the most part, they merely open files or check for a file's
// existence.
class MojoEnv : public leveldb_env::ChromiumEnv {
public:
MojoEnv(const std::string& name,
scoped_refptr<LevelDBMojoProxy> file_thread,
LevelDBMojoProxy::OpaqueDir* dir);
~MojoEnv() override;
// Overridden from leveldb_env::EnvChromium:
Status NewSequentialFile(const std::string& fname,
SequentialFile** result) override;
Status NewRandomAccessFile(const std::string& fname,
RandomAccessFile** result) override;
Status NewWritableFile(const std::string& fname,
WritableFile** result) override;
Status NewAppendableFile(const std::string& fname,
WritableFile** result) override;
bool FileExists(const std::string& fname) override;
Status GetChildren(const std::string& dir,
std::vector<std::string>* result) override;
Status DeleteFile(const std::string& fname) override;
Status CreateDir(const std::string& dirname) override;
Status DeleteDir(const std::string& dirname) override;
Status GetFileSize(const std::string& fname, uint64_t* file_size) override;
Status RenameFile(const std::string& src, const std::string& target) override;
Status LockFile(const std::string& fname, FileLock** lock) override;
Status UnlockFile(FileLock* lock) override;
Status GetTestDirectory(std::string* path) override;
Status NewLogger(const std::string& fname, Logger** result) override;
// For reference, we specifically don't override Schedule(), StartThread(),
// NowMicros() or SleepForMicroseconds() and use the EnvChromium versions.
private:
scoped_refptr<LevelDBMojoProxy> thread_;
LevelDBMojoProxy::OpaqueDir* dir_;
DISALLOW_COPY_AND_ASSIGN(MojoEnv);
};
} // namespace leveldb
#endif // COMPONENTS_LEVELDB_ENV_MOJO_H_