1/*
2 * Copyright 2017-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#include <folly/futures/test/TestExecutor.h>
18
19using namespace std;
20
21namespace folly {
22
23TestExecutor::TestExecutor(size_t numThreads) {
24 const auto kWorkers = std::max(size_t(1), numThreads);
25 for (auto idx = 0u; idx < kWorkers; ++idx) {
26 workers_.emplace_back([this] {
27 while (true) {
28 Func work;
29 {
30 unique_lock<mutex> lk(m_);
31 cv_.wait(lk, [this] { return !workItems_.empty(); });
32 work = std::move(workItems_.front());
33 workItems_.pop();
34 }
35 if (!work) {
36 break;
37 }
38 work();
39 }
40 });
41 }
42}
43
44TestExecutor::~TestExecutor() {
45 for (auto& worker : workers_) {
46 (void)worker;
47 addImpl({});
48 }
49
50 for (auto& worker : workers_) {
51 worker.join();
52 }
53}
54
55void TestExecutor::add(Func f) {
56 if (f) {
57 addImpl(std::move(f));
58 }
59}
60
61size_t TestExecutor::numThreads() const {
62 return workers_.size();
63}
64
65void TestExecutor::addImpl(Func f) {
66 {
67 lock_guard<mutex> g(m_);
68 workItems_.push(std::move(f));
69 }
70 cv_.notify_one();
71}
72
73} // namespace folly
74