Merge "Allow DeviceStateProvider to provide optional String name for device... (fad45691) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/devicestate/DeviceState.java

0 → 100644

+86 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 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.devicestate;

		import static android.hardware.devicestate.DeviceStateManager.INVALID_DEVICE_STATE;

		import android.annotation.IntRange;
		import android.annotation.NonNull;

		import java.util.Objects;

		/**
		* A state of the device defined by the {@link DeviceStateProvider} and managed by the
		* {@link DeviceStateManagerService}.
		* <p>
		* Device state is an abstract concept that allows mapping the current state of the device to the
		* state of the system. This is useful for variable-state devices, like foldable or rollable
		* devices, that can be configured by users into differing hardware states, which each may have a
		* different expected use case.
		*
		* @see DeviceStateProvider
		* @see DeviceStateManagerService
		*/
		public final class DeviceState {
		/** Unique identifier for the device state. */
		@IntRange(from = INVALID_DEVICE_STATE)
		private final int mIdentifier;

		/** String description of the device state. */
		@NonNull
		private final String mName;

		public DeviceState(@IntRange(from = INVALID_DEVICE_STATE) int identifier,
		@NonNull String name) {
		if (identifier != INVALID_DEVICE_STATE && identifier < 0) {
		throw new IllegalArgumentException("Identifier must be greater than or equal to zero.");
		}
		mIdentifier = identifier;
		mName = name;
		}

		/** Returns the unique identifier for the device state. */
		@IntRange(from = INVALID_DEVICE_STATE)
		public int getIdentifier() {
		return mIdentifier;
		}

		/** Returns a string description of the device state. */
		@NonNull
		public String getName() {
		return mName;
		}

		@Override
		public String toString() {
		return "DeviceState{" + "identifier=" + mIdentifier + ", name='" + mName + '\'' + '}';
		}

		@Override
		public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null \|\| getClass() != o.getClass()) return false;
		DeviceState that = (DeviceState) o;
		return mIdentifier == that.mIdentifier
		&& Objects.equals(mName, that.mName);
		}

		@Override
		public int hashCode() {
		return Objects.hash(mIdentifier, mName);
		}
		}

services/core/java/com/android/server/devicestate/DeviceStateManagerService.java

+89 −66

Original line number	Diff line number	Diff line
		@@ -19,7 +19,9 @@ package com.android.server.devicestate;
		import static android.Manifest.permission.CONTROL_DEVICE_STATE;
		import static android.hardware.devicestate.DeviceStateManager.INVALID_DEVICE_STATE;

		import android.annotation.IntRange;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.content.Context;
		import android.content.pm.PackageManager;
		import android.hardware.devicestate.IDeviceStateManager;
		@@ -29,7 +31,6 @@ import android.os.IBinder;
		import android.os.RemoteException;
		import android.os.ResultReceiver;
		import android.os.ShellCallback;
		import android.util.IntArray;
		import android.util.Slog;
		import android.util.SparseArray;

		@@ -42,7 +43,7 @@ import com.android.server.policy.DeviceStatePolicyImpl;
		import java.io.FileDescriptor;
		import java.io.PrintWriter;
		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.Optional;

		/**
		* A system service that manages the state of a device with user-configurable hardware like a
		@@ -74,26 +75,31 @@ public final class DeviceStateManagerService extends SystemService {
		@NonNull
		private final BinderService mBinderService;

		// All supported device states keyed by identifier.
		@GuardedBy("mLock")
		private IntArray mSupportedDeviceStates;
		private SparseArray<DeviceState> mDeviceStates = new SparseArray<>();

		// The current committed device state.
		// The current committed device state. The default of INVALID_DEVICE_STATE will be replaced by
		// the current state after the initial callback from the DeviceStateProvider.
		@GuardedBy("mLock")
		private int mCommittedState = INVALID_DEVICE_STATE;
		@NonNull
		private DeviceState mCommittedState = new DeviceState(INVALID_DEVICE_STATE, "INVALID");
		// The device state that is currently awaiting callback from the policy to be committed.
		@GuardedBy("mLock")
		private int mPendingState = INVALID_DEVICE_STATE;
		@NonNull
		private Optional<DeviceState> mPendingState = Optional.empty();
		// Whether or not the policy is currently waiting to be notified of the current pending state.
		@GuardedBy("mLock")
		private boolean mIsPolicyWaitingForState = false;
		// The device state that is currently requested and is next to be configured and committed.
		// Can be overwritten by an override state value if requested.
		@GuardedBy("mLock")
		private int mRequestedState = INVALID_DEVICE_STATE;
		// The most recently requested override state, or INVALID_DEVICE_STATE if no override is
		// requested.
		@NonNull
		private Optional<DeviceState> mRequestedState = Optional.empty();
		// The most recently requested override state, or empty if no override is requested.
		@GuardedBy("mLock")
		private int mRequestedOverrideState = INVALID_DEVICE_STATE;
		@NonNull
		private Optional<DeviceState> mRequestedOverrideState = Optional.empty();

		// List of registered callbacks indexed by process id.
		@GuardedBy("mLock")
		@@ -122,18 +128,20 @@ public final class DeviceStateManagerService extends SystemService {
		*
		* @see #getPendingState()
		*/
		int getCommittedState() {
		@NonNull
		DeviceState getCommittedState() {
		synchronized (mLock) {
		return mCommittedState;
		}
		}

		/**
		* Returns the state the system is currently configuring, or {@link #INVALID_DEVICE_STATE} if
		* the system is not in the process of configuring a state.
		* Returns the state the system is currently configuring, or {@link Optional#empty()} if the
		* system is not in the process of configuring a state.
		*/
		@VisibleForTesting
		int getPendingState() {
		@NonNull
		Optional<DeviceState> getPendingState() {
		synchronized (mLock) {
		return mPendingState;
		}
		@@ -143,7 +151,8 @@ public final class DeviceStateManagerService extends SystemService {
		* Returns the requested state. The service will configure the device to match the requested
		* state when possible.
		*/
		int getRequestedState() {
		@NonNull
		Optional<DeviceState> getRequestedState() {
		synchronized (mLock) {
		return mRequestedState;
		}
		@@ -165,7 +174,7 @@ public final class DeviceStateManagerService extends SystemService {
		return false;
		}

		mRequestedOverrideState = overrideState;
		mRequestedOverrideState = getStateLocked(overrideState);
		updatePendingStateLocked();
		}

		@@ -181,20 +190,24 @@ public final class DeviceStateManagerService extends SystemService {
		}

		/**
		* Returns the current requested override state, or {@link #INVALID_DEVICE_STATE} is no override
		* Returns the current requested override state, or {@link Optional#empty()} if no override
		* state is requested.
		*/
		int getOverrideState() {
		@NonNull
		Optional<DeviceState> getOverrideState() {
		synchronized (mLock) {
		return mRequestedOverrideState;
		}
		}

		/** Returns the list of currently supported device states. */
		int[] getSupportedStates() {
		DeviceState[] getSupportedStates() {
		synchronized (mLock) {
		// Copy array to prevent external modification of internal state.
		return Arrays.copyOf(mSupportedDeviceStates.toArray(), mSupportedDeviceStates.size());
		DeviceState[] supportedStates = new DeviceState[mDeviceStates.size()];
		for (int i = 0; i < supportedStates.length; i++) {
		supportedStates[i] = mDeviceStates.valueAt(i);
		}
		return supportedStates;
		}
		}

		@@ -203,24 +216,26 @@ public final class DeviceStateManagerService extends SystemService {
		return mBinderService;
		}

		private void updateSupportedStates(int[] supportedDeviceStates) {
		// Must ensure sorted as isSupportedStateLocked() impl uses binary search.
		Arrays.sort(supportedDeviceStates, 0, supportedDeviceStates.length);
		private void updateSupportedStates(DeviceState[] supportedDeviceStates) {
		synchronized (mLock) {
		mSupportedDeviceStates = IntArray.wrap(supportedDeviceStates);
		mDeviceStates.clear();
		for (int i = 0; i < supportedDeviceStates.length; i++) {
		DeviceState state = supportedDeviceStates[i];
		mDeviceStates.put(state.getIdentifier(), state);
		}

		if (mRequestedState != INVALID_DEVICE_STATE
		&& !isSupportedStateLocked(mRequestedState)) {
		if (mRequestedState.isPresent()
		&& !isSupportedStateLocked(mRequestedState.get().getIdentifier())) {
		// The current requested state is no longer valid. We'll clear it here, though
		// we won't actually update the current state until a callback comes from the
		// provider with the most recent state.
		mRequestedState = INVALID_DEVICE_STATE;
		mRequestedState = Optional.empty();
		}
		if (mRequestedOverrideState != INVALID_DEVICE_STATE
		&& !isSupportedStateLocked(mRequestedOverrideState)) {
		if (mRequestedOverrideState.isPresent()
		&& !isSupportedStateLocked(mRequestedOverrideState.get().getIdentifier())) {
		// The current override state is no longer valid. We'll clear it here and update
		// the committed state if necessary.
		mRequestedOverrideState = INVALID_DEVICE_STATE;
		mRequestedOverrideState = Optional.empty();
		}
		updatePendingStateLocked();
		}
		@@ -230,10 +245,19 @@ public final class DeviceStateManagerService extends SystemService {

		/**
		* Returns {@code true} if the provided state is supported. Requires that
		* {@link #mSupportedDeviceStates} is sorted prior to calling.
		* {@link #mDeviceStates} is sorted prior to calling.
		*/
		private boolean isSupportedStateLocked(int identifier) {
		return mDeviceStates.contains(identifier);
		}

		/**
		* Returns the {@link DeviceState} with the supplied {@code identifier}, or {@code null} if
		* there is no device state with the identifier.
		*/
		private boolean isSupportedStateLocked(int state) {
		return mSupportedDeviceStates.binarySearch(state) >= 0;
		@Nullable
		private Optional<DeviceState> getStateLocked(int identifier) {
		return Optional.ofNullable(mDeviceStates.get(identifier));
		}

		/**
		@@ -242,10 +266,11 @@ public final class DeviceStateManagerService extends SystemService {
		*
		* @see #isSupportedStateLocked(int)
		*/
		private void requestState(int state) {
		private void requestState(int identifier) {
		synchronized (mLock) {
		if (isSupportedStateLocked(state)) {
		mRequestedState = state;
		final Optional<DeviceState> requestedState = getStateLocked(identifier);
		if (requestedState.isPresent()) {
		mRequestedState = requestedState;
		}
		updatePendingStateLocked();
		}
		@@ -259,19 +284,19 @@ public final class DeviceStateManagerService extends SystemService {
		* changed.
		*/
		private void updatePendingStateLocked() {
		if (mPendingState != INVALID_DEVICE_STATE) {
		if (mPendingState.isPresent()) {
		// Have pending state, can not configure a new state until the state is committed.
		return;
		}

		int stateToConfigure;
		if (mRequestedOverrideState != INVALID_DEVICE_STATE) {
		stateToConfigure = mRequestedOverrideState;
		final DeviceState stateToConfigure;
		if (mRequestedOverrideState.isPresent()) {
		stateToConfigure = mRequestedOverrideState.get();
		} else {
		stateToConfigure = mRequestedState;
		stateToConfigure = mRequestedState.orElse(null);
		}

		if (stateToConfigure == INVALID_DEVICE_STATE) {
		if (stateToConfigure == null) {
		// No currently requested state.
		return;
		}
		@@ -281,7 +306,7 @@ public final class DeviceStateManagerService extends SystemService {
		return;
		}

		mPendingState = stateToConfigure;
		mPendingState = Optional.of(stateToConfigure);
		mIsPolicyWaitingForState = true;
		}

		@@ -302,7 +327,7 @@ public final class DeviceStateManagerService extends SystemService {
		return;
		}
		mIsPolicyWaitingForState = false;
		state = mPendingState;
		state = mPendingState.get().getIdentifier();
		}

		if (DEBUG) {
		@@ -333,9 +358,9 @@ public final class DeviceStateManagerService extends SystemService {
		if (DEBUG) {
		Slog.d(TAG, "Committing state: " + mPendingState);
		}
		mCommittedState = mPendingState;
		newState = mCommittedState;
		mPendingState = INVALID_DEVICE_STATE;
		mCommittedState = mPendingState.get();
		newState = mCommittedState.getIdentifier();
		mPendingState = Optional.empty();
		updatePendingStateLocked();
		}

		@@ -389,7 +414,7 @@ public final class DeviceStateManagerService extends SystemService {
		}

		mCallbacks.put(callingPid, record);
		currentState = mCommittedState;
		currentState = mCommittedState.getIdentifier();
		}

		// Notify the callback of the state at registration.
		@@ -406,10 +431,10 @@ public final class DeviceStateManagerService extends SystemService {
		pw.println("DEVICE STATE MANAGER (dumpsys device_state)");

		synchronized (mLock) {
		pw.println(" mCommittedState=" + toString(mCommittedState));
		pw.println(" mPendingState=" + toString(mPendingState));
		pw.println(" mRequestedState=" + toString(mRequestedState));
		pw.println(" mRequestedOverrideState=" + toString(mRequestedOverrideState));
		pw.println(" mCommittedState=" + mCommittedState);
		pw.println(" mPendingState=" + mPendingState);
		pw.println(" mRequestedState=" + mRequestedState);
		pw.println(" mRequestedOverrideState=" + mRequestedOverrideState);

		final int callbackCount = mCallbacks.size();
		pw.println();
		@@ -421,30 +446,28 @@ public final class DeviceStateManagerService extends SystemService {
		}
		}

		private String toString(int state) {
		return state == INVALID_DEVICE_STATE ? "(none)" : String.valueOf(state);
		}

		private final class DeviceStateProviderListener implements DeviceStateProvider.Listener {
		@Override
		public void onSupportedDeviceStatesChanged(int[] newDeviceStates) {
		public void onSupportedDeviceStatesChanged(DeviceState[] newDeviceStates) {
		if (newDeviceStates.length == 0) {
		throw new IllegalArgumentException("Supported device states must not be empty");
		}
		for (int i = 0; i < newDeviceStates.length; i++) {
		if (newDeviceStates[i] < 0) {
		throw new IllegalArgumentException("Supported device states includes invalid"
		+ " value: " + newDeviceStates[i]);
		if (newDeviceStates[i].getIdentifier() == INVALID_DEVICE_STATE) {
		throw new IllegalArgumentException(
		"Supported device states includes INVALID_DEVICE_STATE identifier");
		}
		}

		updateSupportedStates(newDeviceStates);
		}

		@Override
		public void onStateChanged(int state) {
		if (state < 0) {
		throw new IllegalArgumentException("Invalid state: " + state);
		public void onStateChanged(@IntRange(from = 0) int identifier) {
		if (identifier < 0) {
		throw new IllegalArgumentException("Invalid identifier: " + identifier);
		}

		requestState(state);
		requestState(identifier);
		}
		}

services/core/java/com/android/server/devicestate/DeviceStateManagerShellCommand.java

+12 −25

Original line number	Diff line number	Diff line
		@@ -16,11 +16,10 @@

		package com.android.server.devicestate;

		import static android.hardware.devicestate.DeviceStateManager.INVALID_DEVICE_STATE;

		import android.os.ShellCommand;

		import java.io.PrintWriter;
		import java.util.Optional;

		/**
		* ShellCommands for {@link DeviceStateManagerService}.
		@@ -52,24 +51,15 @@ public class DeviceStateManagerShellCommand extends ShellCommand {
		}

		private void printState(PrintWriter pw) {
		int committedState = mInternal.getCommittedState();
		int requestedState = mInternal.getRequestedState();
		int requestedOverrideState = mInternal.getOverrideState();

		if (committedState == INVALID_DEVICE_STATE) {
		pw.println("Device state: (invalid)");
		} else {
		pw.println("Device state: " + committedState);
		}
		DeviceState committedState = mInternal.getCommittedState();
		Optional<DeviceState> requestedState = mInternal.getRequestedState();
		Optional<DeviceState> requestedOverrideState = mInternal.getOverrideState();

		if (requestedOverrideState != INVALID_DEVICE_STATE) {
		pw.println("Committed state: " + committedState);
		if (requestedOverrideState.isPresent()) {
		pw.println("----------------------");
		if (requestedState == INVALID_DEVICE_STATE) {
		pw.println("Base state: (invalid)");
		} else {
		pw.println("Base state: " + requestedState);
		}
		pw.println("Override state: " + committedState);
		pw.println("Base state: " + requestedState.orElse(null));
		pw.println("Override state: " + requestedOverrideState.get());
		}
		}

		@@ -102,13 +92,10 @@ public class DeviceStateManagerShellCommand extends ShellCommand {
		}

		private int runPrintStates(PrintWriter pw) {
		int[] states = mInternal.getSupportedStates();
		pw.print("Supported states: [ ");
		DeviceState[] states = mInternal.getSupportedStates();
		pw.print("Supported states: [\n");
		for (int i = 0; i < states.length; i++) {
		pw.print(states[i]);
		if (i < states.length - 1) {
		pw.print(", ");
		}
		pw.print(" " + states[i] + ",\n");
		}
		pw.println("]");
		return 0;

services/core/java/com/android/server/devicestate/DeviceStateProvider.java

+17 −14

Original line number	Diff line number	Diff line
		@@ -16,9 +16,11 @@

		package com.android.server.devicestate;

		import android.annotation.IntRange;

		/**
		* Responsible for providing the set of currently supported device states and well as the current
		* device state.
		* Responsible for providing the set of supported {@link DeviceState device states} as well as the
		* current device state.
		*
		* @see DeviceStatePolicy
		*/
		@@ -26,8 +28,8 @@ public interface DeviceStateProvider {
		/**
		* Registers a listener for changes in provider state.
		* <p>
		* It is <b>required</b> that {@link Listener#onSupportedDeviceStatesChanged(int[])} be called
		* followed by {@link Listener#onStateChanged(int)} with the initial values on successful
		* It is <b>required</b> that {@link Listener#onSupportedDeviceStatesChanged(DeviceState[])} be
		* called followed by {@link Listener#onStateChanged(int)} with the initial values on successful
		* registration of the listener.
		*/
		void setListener(Listener listener);
		@@ -35,35 +37,36 @@ public interface DeviceStateProvider {
		/** Callback for changes in {@link DeviceStateProvider} state. */
		interface Listener {
		/**
		* Called to notify the listener of a change in supported device states. Required to be
		* called once on successful registration of the listener and then once on every
		* subsequent change in supported device states.
		* Called to notify the listener of a change in supported {@link DeviceState device states}.
		* Required to be called once on successful registration of the listener and then once on
		* every subsequent change in supported device states.
		* <p>
		* The set of device states can change based on the current hardware state of the device.
		* For example, if a device state depends on a particular peripheral device (display, etc)
		* it would only be reported as supported when the device is plugged. Otherwise, it should
		* not be included in the set of supported states.
		* <p>
		* All values provided must be greater than or equal to zero and there must always be at
		* least one supported device state.
		* The identifier for every provided device state must be unique and greater than or equal
		* to zero and there must always be at least one supported device state.
		*
		* @param newDeviceStates array of supported device states.
		*
		* @throws IllegalArgumentException if the list of device states is empty or if one of the
		* provided states is less than 0.
		* provided states contains an invalid identifier.
		*/
		void onSupportedDeviceStatesChanged(int[] newDeviceStates);
		void onSupportedDeviceStatesChanged(DeviceState[] newDeviceStates);

		/**
		* Called to notify the listener of a change in current device state. Required to be called
		* once on successful registration of the listener and then once on every subsequent change
		* in device state. Value must have been included in the set of supported device states
		* provided in the most recent call to {@link #onSupportedDeviceStatesChanged(int[])}.
		* provided in the most recent call to
		* {@link #onSupportedDeviceStatesChanged(DeviceState[])}.
		*
		* @param state the new device state.
		* @param identifier the identifier of the new device state.
		*
		* @throws IllegalArgumentException if the state is less than 0.
		*/
		void onStateChanged(int state);
		void onStateChanged(@IntRange(from = 0) int identifier);
		}
		}

services/core/java/com/android/server/policy/DeviceStateProviderImpl.java

+38 −25

File changed.

Preview size limit exceeded, changes collapsed.