1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "count_down_latch.h"
16
17 #include <mutex>
18 #include <condition_variable>
19 #include <chrono>
20
21 namespace OHOS {
22 namespace WuKong {
CountDownLatch(int count)23 CountDownLatch::CountDownLatch(int count) : count_(count), done_(false), mtx_(), cv_() {}
countDown()24 void CountDownLatch::countDown()
25 {
26 std::unique_lock<std::mutex> lock(mtx_);
27 if (--count_ == 0) {
28 done_ = true;
29 cv_.notify_all();
30 }
31 }
32
await(std::chrono::milliseconds timeout)33 bool CountDownLatch::await(std::chrono::milliseconds timeout)
34 {
35 std::unique_lock<std::mutex> lock(mtx_);
36 if (cv_.wait_for(lock, timeout, [this] { return done_ || count_ == 0; })) {
37 return true;
38 } else {
39 return false;
40 }
41 }
42
43 } // namespace WuKong
44 } // namespace OHOS