ae0b290387
To avoid duplicate symbol linker error and prep for addition of json descriptor reading and activation functions in upcoming changes. Bug: 349105928 Test: m Change-Id: I5cd663d6007ef330b872b8cf8ed046ee68b6d736
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/*
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* Copyright (C) 2024 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 <processgroup/util.h>
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#include <algorithm>
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#include <iterator>
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namespace {
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const char SEP = '/';
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std::string DeduplicateAndTrimSeparators(const std::string& path) {
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bool lastWasSep = false;
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std::string ret;
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std::copy_if(path.begin(), path.end(), std::back_inserter(ret), [&lastWasSep](char c) {
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if (lastWasSep) {
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if (c == SEP) return false;
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lastWasSep = false;
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} else if (c == SEP) {
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lastWasSep = true;
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}
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return true;
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});
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if (ret.length() > 1 && ret.back() == SEP) ret.pop_back();
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return ret;
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}
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} // anonymous namespace
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namespace util {
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unsigned int GetCgroupDepth(const std::string& controller_root, const std::string& cgroup_path) {
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const std::string deduped_root = DeduplicateAndTrimSeparators(controller_root);
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const std::string deduped_path = DeduplicateAndTrimSeparators(cgroup_path);
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if (deduped_root.empty() || deduped_path.empty() || !deduped_path.starts_with(deduped_root))
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return 0;
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return std::count(deduped_path.begin() + deduped_root.size(), deduped_path.end(), SEP);
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}
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} // namespace util
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