rocksdb/db/db_filesnapshot.cc

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// Copyright (c) 2012 Facebook.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "db/db_impl.h"
#include "db/filename.h"
#include <string>
#include <stdint.h>
#include "db/version_set.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "port/port.h"
#include "util/mutexlock.h"
namespace leveldb {
Status DBImpl::DisableFileDeletions() {
MutexLock l(&mutex_);
disable_delete_obsolete_files_ = true;
return Status::OK();
}
Status DBImpl::EnableFileDeletions() {
MutexLock l(&mutex_);
disable_delete_obsolete_files_ = false;
return Status::OK();
}
Status DBImpl::GetLiveFiles(std::vector<std::string>& ret,
uint64_t* manifest_file_size) {
*manifest_file_size = 0;
// flush all dirty data to disk.
Status status = Flush(FlushOptions());
if (!status.ok()) {
Log(options_.info_log, "Cannot Flush data %s\n",
status.ToString().c_str());
return status;
}
MutexLock l(&mutex_);
// Make a set of all of the live *.sst files
std::set<uint64_t> live;
versions_->AddLiveFilesCurrentVersion(&live);
ret.resize(live.size() + 2); //*.sst + CURRENT + MANIFEST
// create names of the live files. The names are not absolute
// paths, instead they are relative to dbname_;
std::set<uint64_t>::iterator it = live.begin();
for (unsigned int i = 0; i < live.size(); i++, it++) {
ret[i] = TableFileName("", *it);
}
ret[live.size()] = CurrentFileName("");
ret[live.size()+1] = DescriptorFileName("",
versions_->ManifestFileNumber());
// find length of manifest file while holding the mutex lock
*manifest_file_size = versions_->ManifestFileSize();
return Status::OK();
}
}