mirror of https://github.com/facebook/rocksdb.git
140 lines
6.5 KiB
C++
140 lines
6.5 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include <atomic>
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#include <map>
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#include <string>
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#include <vector>
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#include "env/composite_env_wrapper.h"
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#include "port/port.h"
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#include "rocksdb/env.h"
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#include "rocksdb/status.h"
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#include "rocksdb/system_clock.h"
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namespace ROCKSDB_NAMESPACE {
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class MemFile;
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class MockFileSystem : public FileSystem {
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public:
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explicit MockFileSystem(const std::shared_ptr<SystemClock>& clock,
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bool supports_direct_io = true);
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~MockFileSystem() override;
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static const char* kClassName() { return "MemoryFileSystem"; }
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const char* Name() const override { return kClassName(); }
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IOStatus NewSequentialFile(const std::string& f, const FileOptions& file_opts,
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std::unique_ptr<FSSequentialFile>* r,
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IODebugContext* dbg) override;
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IOStatus NewRandomAccessFile(const std::string& f,
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const FileOptions& file_opts,
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std::unique_ptr<FSRandomAccessFile>* r,
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IODebugContext* dbg) override;
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IOStatus NewRandomRWFile(const std::string& fname,
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const FileOptions& file_opts,
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std::unique_ptr<FSRandomRWFile>* result,
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IODebugContext* dbg) override;
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IOStatus ReuseWritableFile(const std::string& fname,
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const std::string& old_fname,
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const FileOptions& file_opts,
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std::unique_ptr<FSWritableFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewWritableFile(const std::string& fname,
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const FileOptions& file_opts,
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std::unique_ptr<FSWritableFile>* result,
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IODebugContext* dbg) override;
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IOStatus ReopenWritableFile(const std::string& fname,
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const FileOptions& options,
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std::unique_ptr<FSWritableFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewDirectory(const std::string& /*name*/, const IOOptions& io_opts,
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std::unique_ptr<FSDirectory>* result,
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IODebugContext* dbg) override;
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IOStatus FileExists(const std::string& fname, const IOOptions& /*io_opts*/,
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IODebugContext* /*dbg*/) override;
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IOStatus GetChildren(const std::string& dir, const IOOptions& options,
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std::vector<std::string>* result,
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IODebugContext* dbg) override;
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IOStatus DeleteFile(const std::string& fname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus Truncate(const std::string& fname, size_t size,
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const IOOptions& options, IODebugContext* dbg) override;
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IOStatus CreateDir(const std::string& dirname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus CreateDirIfMissing(const std::string& dirname,
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const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus DeleteDir(const std::string& dirname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus GetFileSize(const std::string& fname, const IOOptions& options,
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uint64_t* file_size, IODebugContext* dbg) override;
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IOStatus GetFileModificationTime(const std::string& fname,
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const IOOptions& options,
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uint64_t* file_mtime,
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IODebugContext* dbg) override;
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IOStatus RenameFile(const std::string& src, const std::string& target,
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const IOOptions& options, IODebugContext* dbg) override;
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IOStatus LinkFile(const std::string& /*src*/, const std::string& /*target*/,
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const IOOptions& /*options*/,
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IODebugContext* /*dbg*/) override;
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IOStatus LockFile(const std::string& fname, const IOOptions& options,
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FileLock** lock, IODebugContext* dbg) override;
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IOStatus UnlockFile(FileLock* lock, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus GetTestDirectory(const IOOptions& options, std::string* path,
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IODebugContext* dbg) override;
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IOStatus NewLogger(const std::string& fname, const IOOptions& io_opts,
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std::shared_ptr<Logger>* result,
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IODebugContext* dbg) override;
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// Get full directory name for this db.
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IOStatus GetAbsolutePath(const std::string& db_path,
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const IOOptions& /*options*/,
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std::string* output_path,
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IODebugContext* /*dbg*/) override;
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IOStatus IsDirectory(const std::string& /*path*/,
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const IOOptions& /*options*/, bool* /*is_dir*/,
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IODebugContext* /*dgb*/) override {
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return IOStatus::NotSupported("IsDirectory");
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}
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Status CorruptBuffer(const std::string& fname);
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private:
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bool RenameFileInternal(const std::string& src, const std::string& dest);
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void DeleteFileInternal(const std::string& fname);
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bool GetChildrenInternal(const std::string& fname,
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std::vector<std::string>* results);
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std::string NormalizeMockPath(const std::string& path);
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private:
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// Map from filenames to MemFile objects, representing a simple file system.
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port::Mutex mutex_;
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std::map<std::string, MemFile*> file_map_; // Protected by mutex_.
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std::shared_ptr<SystemClock> system_clock_;
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SystemClock* clock_;
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bool supports_direct_io_;
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};
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class MockEnv : public CompositeEnvWrapper {
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public:
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static MockEnv* Create(Env* base);
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static MockEnv* Create(Env* base, const std::shared_ptr<SystemClock>& clock);
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Status CorruptBuffer(const std::string& fname);
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private:
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MockEnv(Env* env, const std::shared_ptr<FileSystem>& fs,
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const std::shared_ptr<SystemClock>& clock);
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};
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} // namespace ROCKSDB_NAMESPACE
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