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4e60663b31
Summary: In C++, `extern` is redundant in a number of cases: * "Global" function declarations and definitions * "Global" variable definitions when already declared `extern` For consistency and simplicity, I've removed these in code that *we own*. In a couple of cases, I removed obsolete declarations, and for MagicNumber constants, I have consolidated the declarations into a header file (format.h) as standard best practice would prescribe. Pull Request resolved: https://github.com/facebook/rocksdb/pull/12300 Test Plan: no functional changes, CI Reviewed By: ajkr Differential Revision: D53148629 Pulled By: pdillinger fbshipit-source-id: fb8d927959892e03af09b0c0d542b0a3b38fd886
110 lines
4.3 KiB
C++
110 lines
4.3 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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#pragma once
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#include <string>
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#include "file/filename.h"
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#include "options/db_options.h"
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#include "rocksdb/env.h"
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#include "rocksdb/file_system.h"
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#include "rocksdb/sst_file_writer.h"
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#include "rocksdb/statistics.h"
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#include "rocksdb/status.h"
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#include "rocksdb/system_clock.h"
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#include "rocksdb/types.h"
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#include "trace_replay/io_tracer.h"
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namespace ROCKSDB_NAMESPACE {
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// use_fsync maps to options.use_fsync, which determines the way that
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// the file is synced after copying.
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IOStatus CopyFile(FileSystem* fs, const std::string& source,
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std::unique_ptr<WritableFileWriter>& dest_writer,
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uint64_t size, bool use_fsync,
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const std::shared_ptr<IOTracer>& io_tracer,
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const Temperature temperature);
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IOStatus CopyFile(FileSystem* fs, const std::string& source,
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const std::string& destination, uint64_t size, bool use_fsync,
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const std::shared_ptr<IOTracer>& io_tracer,
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const Temperature temperature);
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inline IOStatus CopyFile(const std::shared_ptr<FileSystem>& fs,
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const std::string& source,
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const std::string& destination, uint64_t size,
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bool use_fsync,
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const std::shared_ptr<IOTracer>& io_tracer,
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const Temperature temperature) {
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return CopyFile(fs.get(), source, destination, size, use_fsync, io_tracer,
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temperature);
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}
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IOStatus CreateFile(FileSystem* fs, const std::string& destination,
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const std::string& contents, bool use_fsync);
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inline IOStatus CreateFile(const std::shared_ptr<FileSystem>& fs,
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const std::string& destination,
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const std::string& contents, bool use_fsync) {
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return CreateFile(fs.get(), destination, contents, use_fsync);
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}
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Status DeleteDBFile(const ImmutableDBOptions* db_options,
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const std::string& fname, const std::string& path_to_sync,
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const bool force_bg, const bool force_fg);
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// TODO(hx235): pass the whole DBOptions intead of its individual fields
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IOStatus GenerateOneFileChecksum(
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FileSystem* fs, const std::string& file_path,
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FileChecksumGenFactory* checksum_factory,
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const std::string& requested_checksum_func_name, std::string* file_checksum,
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std::string* file_checksum_func_name,
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size_t verify_checksums_readahead_size, bool allow_mmap_reads,
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std::shared_ptr<IOTracer>& io_tracer, RateLimiter* rate_limiter,
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const ReadOptions& read_options, Statistics* stats, SystemClock* clock);
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inline IOStatus PrepareIOFromReadOptions(const ReadOptions& ro,
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SystemClock* clock, IOOptions& opts) {
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if (ro.deadline.count()) {
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std::chrono::microseconds now =
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std::chrono::microseconds(clock->NowMicros());
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// Ensure there is atleast 1us available. We don't want to pass a value of
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// 0 as that means no timeout
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if (now >= ro.deadline) {
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return IOStatus::TimedOut("Deadline exceeded");
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}
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opts.timeout = ro.deadline - now;
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}
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if (ro.io_timeout.count() &&
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(!opts.timeout.count() || ro.io_timeout < opts.timeout)) {
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opts.timeout = ro.io_timeout;
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}
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opts.rate_limiter_priority = ro.rate_limiter_priority;
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opts.io_activity = ro.io_activity;
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return IOStatus::OK();
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}
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inline IOStatus PrepareIOFromWriteOptions(const WriteOptions& wo,
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IOOptions& opts) {
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opts.rate_limiter_priority = wo.rate_limiter_priority;
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opts.io_activity = wo.io_activity;
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return IOStatus::OK();
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}
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// Test method to delete the input directory and all of its contents.
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// This method is destructive and is meant for use only in tests!!!
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Status DestroyDir(Env* env, const std::string& dir);
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inline bool CheckFSFeatureSupport(FileSystem* fs, FSSupportedOps feat) {
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int64_t supported_ops = 0;
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fs->SupportedOps(supported_ops);
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if (supported_ops & (1ULL << feat)) {
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return true;
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}
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return false;
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}
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} // namespace ROCKSDB_NAMESPACE
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