6924869867
Summary: Made SystemClock into a Customizable class, complete with CreateFromString. Cleaned up some of the existing SystemClock implementations that were redundant (NoSleep was the same as the internal one for MockEnv). Changed MockEnv construction to allow Clock to be passed to the Memory/MockFileSystem. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8636 Reviewed By: zhichao-cao Differential Revision: D30483360 Pulled By: mrambacher fbshipit-source-id: cd0e3a876c39f8c98fe13374c06e8edbd5b9f2a1
291 lines
11 KiB
C++
291 lines
11 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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// 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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//
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// An Env is an interface used by the rocksdb implementation to access
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// operating system functionality like the filesystem etc. Callers
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// may wish to provide a custom Env object when opening a database to
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// get fine gain control; e.g., to rate limit file system operations.
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//
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// All Env implementations are safe for concurrent access from
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// multiple threads without any external synchronization.
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#pragma once
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#include <stdint.h>
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#include <windows.h>
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#include <mutex>
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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/file_system.h"
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#include "rocksdb/system_clock.h"
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#include "util/threadpool_imp.h"
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#undef GetCurrentTime
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#undef DeleteFile
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#undef LoadLibrary
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namespace ROCKSDB_NAMESPACE {
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namespace port {
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// Currently not designed for inheritance but rather a replacement
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class WinEnvThreads {
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public:
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explicit WinEnvThreads(Env* hosted_env);
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~WinEnvThreads();
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WinEnvThreads(const WinEnvThreads&) = delete;
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WinEnvThreads& operator=(const WinEnvThreads&) = delete;
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void Schedule(void (*function)(void*), void* arg, Env::Priority pri,
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void* tag, void (*unschedFunction)(void* arg));
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int UnSchedule(void* arg, Env::Priority pri);
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void StartThread(void (*function)(void* arg), void* arg);
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void WaitForJoin();
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unsigned int GetThreadPoolQueueLen(Env::Priority pri) const;
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static uint64_t gettid();
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uint64_t GetThreadID() const;
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// Allow increasing the number of worker threads.
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void SetBackgroundThreads(int num, Env::Priority pri);
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int GetBackgroundThreads(Env::Priority pri);
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void IncBackgroundThreadsIfNeeded(int num, Env::Priority pri);
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private:
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Env* hosted_env_;
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mutable std::mutex mu_;
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std::vector<ThreadPoolImpl> thread_pools_;
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std::vector<Thread> threads_to_join_;
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};
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class WinClock : public SystemClock {
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public:
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WinClock();
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virtual ~WinClock() {}
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static const char* kClassName() { return "WindowsClock"; }
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const char* Name() const override { return kClassName(); }
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const char* NickName() const override { return kDefaultName(); }
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uint64_t NowMicros() override;
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uint64_t NowNanos() override;
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// 0 indicates not supported
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uint64_t CPUMicros() override { return 0; }
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void SleepForMicroseconds(int micros) override;
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Status GetCurrentTime(int64_t* unix_time) override;
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// Converts seconds-since-Jan-01-1970 to a printable string
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virtual std::string TimeToString(uint64_t time);
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uint64_t GetPerfCounterFrequency() const { return perf_counter_frequency_; }
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private:
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using FnGetSystemTimePreciseAsFileTime = VOID(WINAPI*)(LPFILETIME);
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uint64_t perf_counter_frequency_;
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uint64_t nano_seconds_per_period_;
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FnGetSystemTimePreciseAsFileTime GetSystemTimePreciseAsFileTime_;
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};
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class WinFileSystem : public FileSystem {
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public:
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static const std::shared_ptr<WinFileSystem>& Default();
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WinFileSystem(const std::shared_ptr<SystemClock>& clock);
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~WinFileSystem() {}
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const char* Name() const { return "WinFS"; }
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static size_t GetSectorSize(const std::string& fname);
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size_t GetPageSize() const { return page_size_; }
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size_t GetAllocationGranularity() const { return allocation_granularity_; }
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IOStatus DeleteFile(const std::string& fname, const IOOptions& options,
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IODebugContext* dbg) override;
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// Truncate the named file to the specified size.
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IOStatus Truncate(const std::string& /*fname*/, size_t /*size*/,
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const IOOptions& /*options*/,
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IODebugContext* /*dbg*/) override;
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IOStatus NewSequentialFile(const std::string& fname,
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const FileOptions& file_opts,
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std::unique_ptr<FSSequentialFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewRandomAccessFile(const std::string& fname,
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const FileOptions& options,
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std::unique_ptr<FSRandomAccessFile>* result,
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IODebugContext* /*dbg*/) override;
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IOStatus NewWritableFile(const std::string& f, const FileOptions& file_opts,
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std::unique_ptr<FSWritableFile>* r,
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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 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 NewMemoryMappedFileBuffer(
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const std::string& fname,
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std::unique_ptr<MemoryMappedFileBuffer>* result) 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& f, const IOOptions& io_opts,
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IODebugContext* dbg) override;
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IOStatus GetChildren(const std::string& dir, const IOOptions& io_opts,
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std::vector<std::string>* r,
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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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// Creates directory if missing. Return Ok if it exists, or successful in
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// Creating.
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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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// Delete the specified directory.
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IOStatus DeleteDir(const std::string& dirname, const IOOptions& options,
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IODebugContext* dbg) override;
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// Store the size of fname in *file_size.
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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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// Store the last modification time of fname in *file_mtime.
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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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// Rename file src to target.
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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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// Hard Link file src to target.
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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 NumFileLinks(const std::string& /*fname*/,
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const IOOptions& /*options*/, uint64_t* /*count*/,
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IODebugContext* /*dbg*/) override;
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IOStatus AreFilesSame(const std::string& /*first*/,
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const std::string& /*second*/,
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const IOOptions& /*options*/, bool* /*res*/,
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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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// Create and returns a default logger (an instance of EnvLogger) for storing
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// informational messages. Derived classes can overide to provide custom
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// logger.
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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, 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*/, const IOOptions& options,
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bool* is_dir, IODebugContext* /*dgb*/) override;
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// This seems to clash with a macro on Windows, so #undef it here
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#undef GetFreeSpace
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IOStatus GetFreeSpace(const std::string& /*path*/,
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const IOOptions& /*options*/, uint64_t* /*diskfree*/,
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IODebugContext* /*dbg*/) override;
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FileOptions OptimizeForLogWrite(const FileOptions& file_options,
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const DBOptions& db_options) const override;
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FileOptions OptimizeForManifestRead(
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const FileOptions& file_options) const override;
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FileOptions OptimizeForManifestWrite(
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const FileOptions& file_options) const override;
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protected:
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static uint64_t FileTimeToUnixTime(const FILETIME& ftTime);
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// Returns true iff the named directory exists and is a directory.
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virtual bool DirExists(const std::string& dname);
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// Helper for NewWritable and ReopenWritableFile
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virtual IOStatus OpenWritableFile(const std::string& fname,
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const FileOptions& options,
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std::unique_ptr<FSWritableFile>* result,
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bool reopen);
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private:
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std::shared_ptr<SystemClock> clock_;
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size_t page_size_;
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size_t allocation_granularity_;
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};
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// Designed for inheritance so can be re-used
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// but certain parts replaced
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class WinEnvIO {
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public:
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explicit WinEnvIO(Env* hosted_env);
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virtual ~WinEnvIO();
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virtual Status GetHostName(char* name, uint64_t len);
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private:
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Env* hosted_env_;
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};
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class WinEnv : public CompositeEnv {
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public:
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WinEnv();
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~WinEnv();
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Status GetHostName(char* name, uint64_t len) override;
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Status GetThreadList(std::vector<ThreadStatus>* thread_list) override;
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void Schedule(void (*function)(void*), void* arg, Env::Priority pri,
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void* tag, void (*unschedFunction)(void* arg)) override;
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int UnSchedule(void* arg, Env::Priority pri) override;
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void StartThread(void (*function)(void* arg), void* arg) override;
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void WaitForJoin() override;
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unsigned int GetThreadPoolQueueLen(Env::Priority pri) const override;
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uint64_t GetThreadID() const override;
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// Allow increasing the number of worker threads.
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void SetBackgroundThreads(int num, Env::Priority pri) override;
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int GetBackgroundThreads(Env::Priority pri) override;
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void IncBackgroundThreadsIfNeeded(int num, Env::Priority pri) override;
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private:
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WinEnvIO winenv_io_;
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WinEnvThreads winenv_threads_;
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};
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} // namespace port
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} // namespace ROCKSDB_NAMESPACE
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