80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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* Android BPF library - public API
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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 "LongArrayMultiStateCounter.h"
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#include <log/log.h>
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namespace android {
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namespace battery {
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template <>
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bool LongArrayMultiStateCounter::delta(const std::vector<uint64_t>& previousValue,
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const std::vector<uint64_t>& newValue,
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std::vector<uint64_t>* outValue) const {
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size_t size = previousValue.size();
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if (newValue.size() != size) {
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ALOGE("Incorrect array size: %d, should be %d", (int)newValue.size(), (int)size);
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return false;
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}
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bool is_delta_valid = true;
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for (int i = size - 1; i >= 0; i--) {
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if (newValue[i] >= previousValue[i]) {
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(*outValue)[i] = newValue[i] - previousValue[i];
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} else {
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(*outValue)[i] = 0;
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is_delta_valid = false;
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}
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}
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return is_delta_valid;
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}
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template <>
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void LongArrayMultiStateCounter::add(std::vector<uint64_t>* value1,
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const std::vector<uint64_t>& value2, const uint64_t numerator,
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const uint64_t denominator) const {
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if (numerator != denominator) {
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for (int i = value2.size() - 1; i >= 0; i--) {
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// The caller ensures that denominator != 0
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(*value1)[i] += value2[i] * numerator / denominator;
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}
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} else {
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for (int i = value2.size() - 1; i >= 0; i--) {
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(*value1)[i] += value2[i];
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}
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}
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}
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template <>
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std::string LongArrayMultiStateCounter::valueToString(const std::vector<uint64_t>& v) const {
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std::stringstream s;
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s << "{";
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bool first = true;
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for (uint64_t n : v) {
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if (!first) {
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s << ", ";
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}
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s << n;
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first = false;
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}
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s << "}";
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return s.str();
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}
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} // namespace battery
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} // namespace android
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