The Tor Browser / file comparison
comparison: mobile/android/base/sync/DelayedWorkTracker.java
mobile/android/base/sync/DelayedWorkTracker.java
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
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| -1:000000000000 | 0:29483683c68c |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.sync; | |
| 6 | |
| 7 import org.mozilla.gecko.background.common.log.Logger; | |
| 8 | |
| 9 /** | |
| 10 * A little class to allow us to maintain a count of extant | |
| 11 * things (in our case, callbacks that need to fire), and | |
| 12 * some work that we want done when that count hits 0. | |
| 13 * | |
| 14 * @author rnewman | |
| 15 * | |
| 16 */ | |
| 17 public class DelayedWorkTracker { | |
| 18 private static final String LOG_TAG = "DelayedWorkTracker"; | |
| 19 protected Runnable workItem = null; | |
| 20 protected int outstandingCount = 0; | |
| 21 | |
| 22 public int incrementOutstanding() { | |
| 23 Logger.trace(LOG_TAG, "Incrementing outstanding."); | |
| 24 synchronized(this) { | |
| 25 return ++outstandingCount; | |
| 26 } | |
| 27 } | |
| 28 public int decrementOutstanding() { | |
| 29 Logger.trace(LOG_TAG, "Decrementing outstanding."); | |
| 30 Runnable job = null; | |
| 31 int count; | |
| 32 synchronized(this) { | |
| 33 if ((count = --outstandingCount) == 0 && | |
| 34 workItem != null) { | |
| 35 job = workItem; | |
| 36 workItem = null; | |
| 37 } else { | |
| 38 return count; | |
| 39 } | |
| 40 } | |
| 41 job.run(); | |
| 42 // In case it's changed. | |
| 43 return getOutstandingOperations(); | |
| 44 } | |
| 45 public int getOutstandingOperations() { | |
| 46 synchronized(this) { | |
| 47 return outstandingCount; | |
| 48 } | |
| 49 } | |
| 50 public void delayWorkItem(Runnable item) { | |
| 51 Logger.trace(LOG_TAG, "delayWorkItem."); | |
| 52 boolean runnableNow = false; | |
| 53 synchronized(this) { | |
| 54 Logger.trace(LOG_TAG, "outstandingCount: " + outstandingCount); | |
| 55 if (outstandingCount == 0) { | |
| 56 runnableNow = true; | |
| 57 } else { | |
| 58 if (workItem != null) { | |
| 59 throw new IllegalStateException("Work item already set!"); | |
| 60 } | |
| 61 workItem = item; | |
| 62 } | |
| 63 } | |
| 64 if (runnableNow) { | |
| 65 Logger.trace(LOG_TAG, "Running item now."); | |
| 66 item.run(); | |
| 67 } | |
| 68 } | |
| 69 } |
