mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 07:30:54 +00:00
d616ebea23
Summary: Closes https://github.com/facebook/rocksdb/pull/2226 Differential Revision: D4967547 Pulled By: siying fbshipit-source-id: dd3b58ae1e7a106ab6bb6f37ab5c88575b125ab4
51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// Copyright (c) 2011-present, 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.
|
|
// This source code is also licensed under the GPLv2 license found in the
|
|
// COPYING file in the root directory of this source tree.
|
|
|
|
#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 {
|
|
public:
|
|
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();
|
|
|
|
private:
|
|
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
|