1/*
2 * Copyright 2014-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <queue>
20
21#include <folly/Executor.h>
22#include <folly/ThreadLocal.h>
23
24namespace folly {
25
26/**
27 * Runs inline like InlineExecutor, but with a queue so that any tasks added
28 * to this executor by one of its own callbacks will be queued instead of
29 * executed inline (nested). This is usually better behavior than Inline.
30 */
31class QueuedImmediateExecutor : public Executor {
32 public:
33 static QueuedImmediateExecutor& instance();
34
35 void add(Func func) override;
36
37 private:
38 folly::ThreadLocal<std::queue<Func>> q_;
39};
40
41} // namespace folly
42