75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
/**
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* Copyright (c) 2020, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Experiments.h"
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#include <android-base/format.h>
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#include <netdutils/DumpWriter.h>
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#include <string>
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#include "util.h"
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namespace android::net {
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using netdutils::DumpWriter;
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using netdutils::ScopedIndent;
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Experiments* Experiments::getInstance() {
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// Instantiated on first use.
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static Experiments instance{getExperimentFlagInt};
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return &instance;
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}
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Experiments::Experiments(GetExperimentFlagIntFunction getExperimentFlagIntFunction)
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: mGetExperimentFlagIntFunction(std::move(getExperimentFlagIntFunction)) {
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updateInternal();
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}
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void Experiments::update() {
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updateInternal();
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}
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void Experiments::dump(DumpWriter& dw) const {
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std::lock_guard guard(mMutex);
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dw.println("Experiments list: ");
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for (const auto& [key, value] : mFlagsMapInt) {
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ScopedIndent indentStats(dw);
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if (value == Experiments::kFlagIntDefault) {
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dw.println(fmt::format("{}: UNSET", key));
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} else {
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dw.println(fmt::format("{}: {}", key, value));
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}
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}
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}
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void Experiments::updateInternal() {
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std::lock_guard guard(mMutex);
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for (const auto& key : kExperimentFlagKeyList) {
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mFlagsMapInt[key] = mGetExperimentFlagIntFunction(key, Experiments::kFlagIntDefault);
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}
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}
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int Experiments::getFlag(std::string_view key, int defaultValue) const {
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std::lock_guard guard(mMutex);
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auto it = mFlagsMapInt.find(key);
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if (it != mFlagsMapInt.end() && it->second != Experiments::kFlagIntDefault) {
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return it->second;
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}
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return defaultValue;
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}
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} // namespace android::net
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