content: /*
   * Copyright (C) 2019 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.
   */
  
  package com.android.server.wm;
  
  import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
  
  import android.util.SparseIntArray;
  
  /**
   * This is a partial mirror of {@link @com.android.server.am.ActiveUids}. It is already thread
   * safe so the heavy service lock is not needed when updating state from activity manager (oom
   * adjustment) or getting state from window manager (background start check).
   */
  class MirrorActiveUids {
      private SparseIntArray mUidStates = new SparseIntArray();
  
      synchronized void onUidActive(int uid, int procState) {
          mUidStates.put(uid, procState);
      }
  
      synchronized void onUidInactive(int uid) {
          mUidStates.delete(uid);
      }
  
      synchronized void onActiveUidsCleared() {
          mUidStates.clear();
      }
  
      synchronized void onUidProcStateChanged(int uid, int procState) {
          final int index = mUidStates.indexOfKey(uid);
          if (index >= 0) {
              mUidStates.setValueAt(index, procState);
          }
      }
  
      synchronized int getUidState(int uid) {
          return mUidStates.get(uid, PROCESS_STATE_NONEXISTENT);
      }
  }
  