/*
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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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package com.android.server.wm;
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import android.util.ArraySet;
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import android.util.SparseArray;
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import java.util.Map;
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import java.util.HashMap;
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final class WindowProcessControllerMap {
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/** All processes we currently have running mapped by pid */
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private final SparseArray<WindowProcessController> mPidMap = new SparseArray<>();
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/** All processes we currently have running mapped by uid */
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private final Map<Integer, ArraySet<WindowProcessController>> mUidMap = new HashMap<>();
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/** Retrieves a currently running process for pid. */
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WindowProcessController getProcess(int pid) {
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return mPidMap.get(pid);
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}
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/** Retrieves all currently running processes for uid. */
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ArraySet<WindowProcessController> getProcesses(int uid) {
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return mUidMap.get(uid);
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}
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SparseArray<WindowProcessController> getPidMap() {
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return mPidMap;
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}
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void put(int pid, WindowProcessController proc) {
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// if there is a process for this pid already in mPidMap it'll get replaced automagically,
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// but we actually need to remove it from mUidMap too before adding the new one
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final WindowProcessController prevProc = mPidMap.get(pid);
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if (prevProc != null) {
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removeProcessFromUidMap(prevProc);
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}
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// put process into mPidMap
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mPidMap.put(pid, proc);
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// put process into mUidMap
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final int uid = proc.mUid;
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ArraySet<WindowProcessController> procSet = mUidMap.getOrDefault(uid,
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new ArraySet<WindowProcessController>());
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procSet.add(proc);
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mUidMap.put(uid, procSet);
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}
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void remove(int pid) {
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final WindowProcessController proc = mPidMap.get(pid);
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if (proc != null) {
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// remove process from mPidMap
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mPidMap.remove(pid);
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// remove process from mUidMap
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removeProcessFromUidMap(proc);
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}
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}
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private void removeProcessFromUidMap(WindowProcessController proc) {
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if (proc == null) {
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return;
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}
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final int uid = proc.mUid;
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ArraySet<WindowProcessController> procSet = mUidMap.get(uid);
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if (procSet != null) {
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procSet.remove(proc);
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if (procSet.isEmpty()) {
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mUidMap.remove(uid);
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}
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}
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}
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}
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