87 lines
2.4 KiB
C++
87 lines
2.4 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 "WakeupList.h"
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#include <android-base/logging.h>
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#include <android-base/strings.h>
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namespace android {
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namespace system {
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namespace suspend {
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namespace V1_0 {
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WakeupList::WakeupList(size_t capacity) : mCapacity(capacity) {}
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void WakeupList::getWakeupStats(std::vector<WakeupInfo>* wakeups) const {
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std::scoped_lock lock(mLock);
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for (const WakeupInfo& w : mWakeups) {
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wakeups->push_back(w);
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}
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}
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void WakeupList::update(const std::vector<std::string>& wakeupReasons) {
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if (wakeupReasons.empty()) {
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LOG(ERROR) << "WakeupList: empty wakeup reasons";
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return;
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}
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std::string key = ::android::base::Join(wakeupReasons, ";");
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std::scoped_lock lock(mLock);
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auto it = mLookupTable.find(key);
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if (it == mLookupTable.end()) {
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// Create a new entry
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WakeupInfo w;
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w.name = key;
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w.count = 1;
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insert(std::move(w));
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evict();
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} else {
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// Entry found. Increment the count
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auto staleEntry = it->second;
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WakeupInfo updatedEntry = *staleEntry;
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updatedEntry.count++;
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erase(staleEntry);
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insert(std::move(updatedEntry));
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}
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}
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void WakeupList::evict() {
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if (mWakeups.size() > mCapacity) {
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erase(std::prev(mWakeups.end()));
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LOG(ERROR) << "WakeupList: Capacity met, consider adjusting capacity to "
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"avoid stats eviction.";
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}
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}
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void WakeupList::insert(WakeupInfo entry) {
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mWakeups.push_front(entry);
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mLookupTable.insert_or_assign(entry.name, mWakeups.begin());
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}
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void WakeupList::erase(std::list<WakeupInfo>::iterator entry) {
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mLookupTable.erase(entry->name);
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mWakeups.erase(entry);
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}
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} // namespace V1_0
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} // namespace suspend
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} // namespace system
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} // namespace android
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