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 | |
19 | using namespace std; |
20 | |
21 | namespace folly { |
22 | |
23 | TestExecutor::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 | |
44 | TestExecutor::~TestExecutor() { |
45 | for (auto& worker : workers_) { |
46 | (void)worker; |
47 | addImpl({}); |
48 | } |
49 | |
50 | for (auto& worker : workers_) { |
51 | worker.join(); |
52 | } |
53 | } |
54 | |
55 | void TestExecutor::add(Func f) { |
56 | if (f) { |
57 | addImpl(std::move(f)); |
58 | } |
59 | } |
60 | |
61 | size_t TestExecutor::numThreads() const { |
62 | return workers_.size(); |
63 | } |
64 | |
65 | void 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 |