blob: cd3575861a87a3bfa422d370c25570d940b705a2 [file] [log] [blame]
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include <stdint.h>
#include <atomic>
#include <mutex>
#include <set>
namespace rocksdb {
class ColumnFamilyData;
// Unless otherwise noted, all methods on FlushScheduler should be called
// only with the DB mutex held or from a single-threaded recovery context.
class FlushScheduler {
FlushScheduler() : head_(nullptr) {}
// May be called from multiple threads at once, but not concurrent with
// any other method calls on this instance
void ScheduleFlush(ColumnFamilyData* cfd);
// Removes and returns Ref()-ed column family. Client needs to Unref().
// Filters column families that have been dropped.
ColumnFamilyData* TakeNextColumnFamily();
bool Empty();
void Clear();
struct Node {
ColumnFamilyData* column_family;
Node* next;
std::atomic<Node*> head_;
#ifndef NDEBUG
std::mutex checking_mutex_;
std::set<ColumnFamilyData*> checking_set_;
#endif // NDEBUG
} // namespace rocksdb