statsd/src/utils/MultiConditionTrigger.cpp

/*
 * 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 STATSD_DEBUG false  // STOPSHIP if true

#include "MultiConditionTrigger.h"

#include <thread>

using namespace std;

namespace android {
namespace os {
namespace statsd {

MultiConditionTrigger::MultiConditionTrigger(const set<string>& conditionNames,
                                             function<void()> trigger)
    : mRemainingConditionNames(conditionNames),
      mTrigger(trigger),
      mCompleted(mRemainingConditionNames.empty()) {
    if (mCompleted) {
        thread executorThread([this] { mTrigger(); });
        executorThread.detach();
    }
}

void MultiConditionTrigger::markComplete(const string& conditionName) {
    bool doTrigger = false;
    {
        lock_guard<mutex> lg(mMutex);
        if (mCompleted) {
            return;
        }
        mRemainingConditionNames.erase(conditionName);
        mCompleted = mRemainingConditionNames.empty();
        doTrigger = mCompleted;
    }
    if (doTrigger) {
        std::thread executorThread([this] { mTrigger(); });
        executorThread.detach();
    }
}
}  // namespace statsd
}  // namespace os
}  // namespace android