fad638c82d
Use the LL-NDK library to read cgroup.rc. As a side-effect, the CgroupController class is changed to a wrapper of ACgroupController* from the library. The class itself essentially becomes the pointer, and can be trivially copied. Modify all client code for this change. Test: builds and boots Bug: 123664216 Change-Id: I635d9885db62e82f37421f6d20f59c84a6f4cbb2
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* Copyright (C) 2019 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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#pragma once
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <map>
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#include <memory>
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#include <mutex>
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#include <string>
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#include <vector>
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#include <android/cgrouprc.h>
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// Convenient wrapper of an ACgroupController pointer.
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class CgroupController {
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public:
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// Does not own controller
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explicit CgroupController(const ACgroupController* controller) : controller_(controller) {}
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uint32_t version() const;
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const char* name() const;
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const char* path() const;
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bool HasValue() const;
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std::string GetTasksFilePath(const std::string& path) const;
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std::string GetProcsFilePath(const std::string& path, uid_t uid, pid_t pid) const;
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bool GetTaskGroup(int tid, std::string* group) const;
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private:
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const ACgroupController* controller_ = nullptr;
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};
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class CgroupMap {
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public:
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// Selinux policy ensures only init process can successfully use this function
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static bool SetupCgroups();
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static CgroupMap& GetInstance();
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CgroupController FindController(const std::string& name) const;
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private:
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bool loaded_ = false;
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CgroupMap();
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bool LoadRcFile();
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void Print() const;
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};
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