flush_scheduler.h
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#pragma once
#include <stdint.h>
#include <deque>
#include <set>
#include <vector>
namespace rocksdb {
class ColumnFamilyData;
// This class is thread-compatible. It's should only be accessed from single
// write thread (between BeginWrite() and EndWrite())
class FlushScheduler {
public:
FlushScheduler() = default;
~FlushScheduler() = default;
void ScheduleFlush(ColumnFamilyData* cfd);
// Returns Ref()-ed column family. Client needs to Unref()
// REQUIRES: db mutex is held (exception is single-threaded recovery)
ColumnFamilyData* GetNextColumnFamily();
bool Empty();
void Clear();
private:
std::deque<ColumnFamilyData*> column_families_;
#ifndef NDEBUG
std::set<ColumnFamilyData*> column_families_set_;
#endif // NDEBUG
};
} // namespace rocksdb