| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #define DEBUG false // STOPSHIP if true |
| |
| #include "NamedLatch.h" |
| |
| using namespace std; |
| |
| namespace android { |
| namespace os { |
| namespace statsd { |
| |
| NamedLatch::NamedLatch(const set<string>& eventNames) : mRemainingEventNames(eventNames) { |
| } |
| |
| void NamedLatch::countDown(const string& eventName) { |
| bool notify = false; |
| { |
| lock_guard<mutex> lg(mMutex); |
| mRemainingEventNames.erase(eventName); |
| notify = mRemainingEventNames.empty(); |
| } |
| if (notify) { |
| mConditionVariable.notify_all(); |
| } |
| } |
| |
| void NamedLatch::wait() const { |
| unique_lock<mutex> unique_lk(mMutex); |
| mConditionVariable.wait(unique_lk, [this] { return mRemainingEventNames.empty(); }); |
| } |
| |
| } // namespace statsd |
| } // namespace os |
| } // namespace android |