| /* |
| * Copyright (C) 2014 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.google.android.exoplayer2.util; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import androidx.annotation.Nullable; |
| |
| /** |
| * An interface through which system clocks can be read and {@link HandlerWrapper}s created. The |
| * {@link #DEFAULT} implementation must be used for all non-test cases. |
| */ |
| public interface Clock { |
| |
| /** Default {@link Clock} to use for all non-test cases. */ |
| Clock DEFAULT = new SystemClock(); |
| |
| /** |
| * Returns the current time in milliseconds since the Unix Epoch. |
| * |
| * @see System#currentTimeMillis() |
| */ |
| long currentTimeMillis(); |
| |
| /** @see android.os.SystemClock#elapsedRealtime() */ |
| long elapsedRealtime(); |
| |
| /** @see android.os.SystemClock#uptimeMillis() */ |
| long uptimeMillis(); |
| |
| /** |
| * Creates a {@link HandlerWrapper} using a specified looper and a specified callback for handling |
| * messages. |
| * |
| * @see Handler#Handler(Looper, Handler.Callback) |
| */ |
| HandlerWrapper createHandler(Looper looper, @Nullable Handler.Callback callback); |
| |
| /** |
| * Notifies the clock that the current thread is about to be blocked and won't return until a |
| * condition on another thread becomes true. |
| * |
| * <p>Should be a no-op for all non-test cases. |
| */ |
| void onThreadBlocked(); |
| } |