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Diffstat (limited to 'src/com/android/launcher3/DeferredHandler.java')
-rw-r--r-- | src/com/android/launcher3/DeferredHandler.java | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/src/com/android/launcher3/DeferredHandler.java b/src/com/android/launcher3/DeferredHandler.java deleted file mode 100644 index a43ab6723..000000000 --- a/src/com/android/launcher3/DeferredHandler.java +++ /dev/null @@ -1,120 +0,0 @@ -/* - * Copyright (C) 2008 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.launcher3; - -import android.os.Handler; -import android.os.Looper; -import android.os.Message; -import android.os.MessageQueue; - -import com.android.launcher3.util.Thunk; - -import java.util.LinkedList; - -/** - * Queue of things to run on a looper thread. Items posted with {@link #post} will not - * be actually enqued on the handler until after the last one has run, to keep from - * starving the thread. - * - * This class is fifo. - */ -public class DeferredHandler { - @Thunk LinkedList<Runnable> mQueue = new LinkedList<>(); - private MessageQueue mMessageQueue = Looper.myQueue(); - private Impl mHandler = new Impl(); - - @Thunk class Impl extends Handler implements MessageQueue.IdleHandler { - public void handleMessage(Message msg) { - Runnable r; - synchronized (mQueue) { - if (mQueue.size() == 0) { - return; - } - r = mQueue.removeFirst(); - } - r.run(); - synchronized (mQueue) { - scheduleNextLocked(); - } - } - - public boolean queueIdle() { - handleMessage(null); - return false; - } - } - - private class IdleRunnable implements Runnable { - Runnable mRunnable; - - IdleRunnable(Runnable r) { - mRunnable = r; - } - - public void run() { - mRunnable.run(); - } - } - - public DeferredHandler() { - } - - /** Schedule runnable to run after everything that's on the queue right now. */ - public void post(Runnable runnable) { - synchronized (mQueue) { - mQueue.add(runnable); - if (mQueue.size() == 1) { - scheduleNextLocked(); - } - } - } - - /** Schedule runnable to run when the queue goes idle. */ - public void postIdle(final Runnable runnable) { - post(new IdleRunnable(runnable)); - } - - public void cancelAll() { - synchronized (mQueue) { - mQueue.clear(); - } - } - - /** Runs all queued Runnables from the calling thread. */ - public void flush() { - LinkedList<Runnable> queue = new LinkedList<>(); - synchronized (mQueue) { - queue.addAll(mQueue); - mQueue.clear(); - } - for (Runnable r : queue) { - r.run(); - } - } - - void scheduleNextLocked() { - if (mQueue.size() > 0) { - Runnable peek = mQueue.getFirst(); - if (peek instanceof IdleRunnable) { - mMessageQueue.addIdleHandler(mHandler); - } else { - mHandler.sendEmptyMessage(1); - } - } - } -} - |