fdf882ded2
Summary: When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433 Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag. Differential Revision: D19977691 fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
125 lines
3.7 KiB
C++
125 lines
3.7 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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#include "file/file_util.h"
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#include <string>
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#include <algorithm>
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#include "file/random_access_file_reader.h"
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#include "file/sequence_file_reader.h"
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#include "file/sst_file_manager_impl.h"
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#include "file/writable_file_writer.h"
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#include "rocksdb/env.h"
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namespace ROCKSDB_NAMESPACE {
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// Utility function to copy a file up to a specified length
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Status 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 FileOptions soptions;
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Status s;
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std::unique_ptr<SequentialFileReader> src_reader;
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std::unique_ptr<WritableFileWriter> dest_writer;
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{
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std::unique_ptr<FSSequentialFile> srcfile;
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s = fs->NewSequentialFile(source, soptions, &srcfile, nullptr);
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if (!s.ok()) {
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return s;
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}
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std::unique_ptr<FSWritableFile> destfile;
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s = fs->NewWritableFile(destination, soptions, &destfile, nullptr);
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if (!s.ok()) {
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return s;
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}
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if (size == 0) {
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// default argument means copy everything
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s = fs->GetFileSize(source, IOOptions(), &size, nullptr);
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if (!s.ok()) {
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return s;
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}
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}
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src_reader.reset(new SequentialFileReader(std::move(srcfile), source));
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dest_writer.reset(
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new WritableFileWriter(std::move(destfile), destination, soptions));
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}
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char buffer[4096];
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Slice slice;
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while (size > 0) {
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size_t bytes_to_read = std::min(sizeof(buffer), static_cast<size_t>(size));
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s = src_reader->Read(bytes_to_read, &slice, buffer);
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if (!s.ok()) {
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return s;
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}
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if (slice.size() == 0) {
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return Status::Corruption("file too small");
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}
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s = dest_writer->Append(slice);
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if (!s.ok()) {
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return s;
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}
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size -= slice.size();
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}
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return dest_writer->Sync(use_fsync);
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}
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// Utility function to create a file with the provided contents
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Status CreateFile(FileSystem* fs, const std::string& destination,
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const std::string& contents, bool use_fsync) {
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const EnvOptions soptions;
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Status s;
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std::unique_ptr<WritableFileWriter> dest_writer;
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std::unique_ptr<FSWritableFile> destfile;
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s = fs->NewWritableFile(destination, soptions, &destfile, nullptr);
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if (!s.ok()) {
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return s;
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}
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dest_writer.reset(
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new WritableFileWriter(std::move(destfile), destination, soptions));
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s = dest_writer->Append(Slice(contents));
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if (!s.ok()) {
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return s;
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}
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return dest_writer->Sync(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& dir_to_sync,
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const bool force_bg, const bool force_fg) {
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#ifndef ROCKSDB_LITE
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SstFileManagerImpl* sfm =
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static_cast<SstFileManagerImpl*>(db_options->sst_file_manager.get());
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if (sfm && !force_fg) {
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return sfm->ScheduleFileDeletion(fname, dir_to_sync, force_bg);
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} else {
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return db_options->env->DeleteFile(fname);
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}
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#else
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(void)dir_to_sync;
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(void)force_bg;
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(void)force_fg;
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// SstFileManager is not supported in ROCKSDB_LITE
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// Delete file immediately
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return db_options->env->DeleteFile(fname);
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#endif
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}
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bool IsWalDirSameAsDBPath(const ImmutableDBOptions* db_options) {
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bool same = false;
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assert(!db_options->db_paths.empty());
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Status s = db_options->env->AreFilesSame(db_options->wal_dir,
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db_options->db_paths[0].path, &same);
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if (s.IsNotSupported()) {
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same = db_options->wal_dir == db_options->db_paths[0].path;
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}
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return same;
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}
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} // namespace ROCKSDB_NAMESPACE
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