diff options
Diffstat (limited to 'src/main/java/de/pixart/messenger/utils/SerialSingleThreadExecutor.java')
-rw-r--r-- | src/main/java/de/pixart/messenger/utils/SerialSingleThreadExecutor.java | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/main/java/de/pixart/messenger/utils/SerialSingleThreadExecutor.java b/src/main/java/de/pixart/messenger/utils/SerialSingleThreadExecutor.java new file mode 100644 index 000000000..116149ec1 --- /dev/null +++ b/src/main/java/de/pixart/messenger/utils/SerialSingleThreadExecutor.java @@ -0,0 +1,51 @@ +package de.pixart.messenger.utils; + +import android.os.Looper; + +import java.util.ArrayDeque; +import java.util.Queue; +import java.util.concurrent.Executor; +import java.util.concurrent.Executors; + +public class SerialSingleThreadExecutor implements Executor { + + final Executor executor = Executors.newSingleThreadExecutor(); + protected final Queue<Runnable> tasks = new ArrayDeque(); + Runnable active; + + public SerialSingleThreadExecutor() { + this(false); + } + + public SerialSingleThreadExecutor(boolean prepareLooper) { + if (prepareLooper) { + execute(new Runnable() { + @Override + public void run() { + Looper.prepare(); + } + }); + } + } + + public synchronized void execute(final Runnable r) { + tasks.offer(new Runnable() { + public void run() { + try { + r.run(); + } finally { + scheduleNext(); + } + } + }); + if (active == null) { + scheduleNext(); + } + } + + protected synchronized void scheduleNext() { + if ((active = tasks.poll()) != null) { + executor.execute(active); + } + } +}
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