android13/system/hardware/interfaces/suspend/1.0/default/WakeupList.cpp

87 lines
2.4 KiB
C++

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