1 /* 2 * Copyright (C) 2016 Google Inc. 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 17 package android.location.cts; 18 19 import android.content.Context; 20 import android.content.pm.PackageManager; 21 import android.util.Log; 22 23 import java.util.concurrent.Callable; 24 import java.util.concurrent.CountDownLatch; 25 import java.util.concurrent.TimeUnit; 26 27 public class TestUtils { 28 private static final long STANDARD_WAIT_TIME_MS = 50; 29 private static final long STANDARD_SLEEP_TIME_MS = 50; 30 31 public static boolean waitFor(CountDownLatch latch, int timeInSec) throws InterruptedException { 32 // Since late 2014, if the main thread has been occupied for long enough, Android will 33 // increase its priority. Such new behavior can causes starvation to the background thread - 34 // even if the main thread has called await() to yield its execution, the background thread 35 // still can't get scheduled. 36 // 37 // Here we're trying to wait on the main thread for a PendingIntent from a background 38 // thread. Because of the starvation problem, the background thread may take up to 5 minutes 39 // to deliver the PendingIntent if we simply call await() on the main thread. In order to 40 // give the background thread a chance to run, we call Thread.sleep() in a loop. Such dirty 41 // hack isn't ideal, but at least it can work. 42 // 43 // See also: b/17423027 44 long waitTimeRounds = (TimeUnit.SECONDS.toMillis(timeInSec)) / 45 (STANDARD_WAIT_TIME_MS + STANDARD_SLEEP_TIME_MS); 46 for (int i = 0; i < waitTimeRounds; ++i) { 47 Thread.sleep(STANDARD_SLEEP_TIME_MS); 48 if (latch.await(STANDARD_WAIT_TIME_MS, TimeUnit.MILLISECONDS)) { 49 return true; 50 } 51 } 52 return false; 53 } 54 55 public static boolean waitForWithCondition(int timeInSec, Callable<Boolean> callback) 56 throws Exception { 57 long waitTimeRounds = (TimeUnit.SECONDS.toMillis(timeInSec)) / STANDARD_SLEEP_TIME_MS; 58 for (int i = 0; i < waitTimeRounds; ++i) { 59 Thread.sleep(STANDARD_SLEEP_TIME_MS); 60 if(callback.call()) return true; 61 } 62 return false; 63 } 64 65 public static boolean deviceHasGpsFeature(Context context) { 66 // If device does not have a GPS, skip the test. 67 if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_LOCATION_GPS)) { 68 return true; 69 } 70 Log.w("LocationTestUtils", "GPS feature not present on device, skipping GPS test."); 71 return false; 72 } 73 } 74
