UserState.java revision bd91e2f3f6aca512a02be645b2515b5e3331e177 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.server.am;
18
19import java.io.PrintWriter;
20import java.util.ArrayList;
21
22import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_MU;
23import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
24import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
25
26import android.app.IStopUserCallback;
27import android.os.UserHandle;
28import android.util.ArrayMap;
29import android.util.Slog;
30
31public final class UserState {
32    private static final String TAG = TAG_WITH_CLASS_NAME ? "UserState" : TAG_AM;
33
34    // User is first coming up.
35    public final static int STATE_BOOTING = 0;
36    // User is in the locked state.
37    public final static int STATE_RUNNING_LOCKED = 1;
38    // User is in the unlocking state.
39    public final static int STATE_RUNNING_UNLOCKING = 2;
40    // User is in the running state.
41    public final static int STATE_RUNNING_UNLOCKED = 3;
42    // User is in the initial process of being stopped.
43    public final static int STATE_STOPPING = 4;
44    // User is in the final phase of stopping, sending Intent.ACTION_SHUTDOWN.
45    public final static int STATE_SHUTDOWN = 5;
46
47    public final UserHandle mHandle;
48    public final ArrayList<IStopUserCallback> mStopCallbacks
49            = new ArrayList<IStopUserCallback>();
50
51    public int state = STATE_BOOTING;
52    public int lastState = STATE_BOOTING;
53    public boolean switching;
54    public boolean initializing;
55
56    /**
57     * The last time that a provider was reported to usage stats as being brought to important
58     * foreground procstate.
59     */
60    public final ArrayMap<String,Long> mProviderLastReportedFg = new ArrayMap<>();
61
62    public UserState(UserHandle handle) {
63        mHandle = handle;
64    }
65
66    public boolean setState(int oldState, int newState) {
67        if (state == oldState) {
68            setState(newState);
69            return true;
70        } else {
71            Slog.w(TAG, "Expected user " + mHandle.getIdentifier() + " in state "
72                    + stateToString(oldState) + " but was in state " + stateToString(state));
73            return false;
74        }
75    }
76
77    public void setState(int newState) {
78        if (DEBUG_MU) {
79            Slog.i(TAG, "User " + mHandle.getIdentifier() + " state changed from "
80                    + stateToString(state) + " to " + stateToString(newState));
81        }
82        lastState = state;
83        state = newState;
84    }
85
86    private static String stateToString(int state) {
87        switch (state) {
88            case STATE_BOOTING: return "BOOTING";
89            case STATE_RUNNING_LOCKED: return "RUNNING_LOCKED";
90            case STATE_RUNNING_UNLOCKING: return "RUNNING_UNLOCKING";
91            case STATE_RUNNING_UNLOCKED: return "RUNNING_UNLOCKED";
92            case STATE_STOPPING: return "STOPPING";
93            case STATE_SHUTDOWN: return "SHUTDOWN";
94            default: return Integer.toString(state);
95        }
96    }
97
98    void dump(String prefix, PrintWriter pw) {
99        pw.print(prefix);
100        pw.print("state="); pw.print(stateToString(state));
101        if (switching) pw.print(" SWITCHING");
102        if (initializing) pw.print(" INITIALIZING");
103        pw.println();
104    }
105}
106