53 lines
1.1 KiB
Java
53 lines
1.1 KiB
Java
package eu.siacs.conversations.utils;
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import android.os.Looper;
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import java.util.ArrayDeque;
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import java.util.Queue;
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import java.util.concurrent.Executor;
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import java.util.concurrent.Executors;
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import eu.siacs.conversations.services.AttachFileToConversationRunnable;
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public class SerialSingleThreadExecutor implements Executor {
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final Executor executor = Executors.newSingleThreadExecutor();
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protected final ArrayDeque<Runnable> tasks = new ArrayDeque<>();
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private Runnable active;
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public SerialSingleThreadExecutor() {
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this(false);
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}
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public SerialSingleThreadExecutor(boolean prepareLooper) {
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if (prepareLooper) {
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execute(new Runnable() {
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@Override
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public void run() {
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Looper.prepare();
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}
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});
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}
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}
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public synchronized void execute(final Runnable r) {
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tasks.offer(new Runnable() {
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public void run() {
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try {
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r.run();
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} finally {
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scheduleNext();
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}
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}
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});
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if (active == null) {
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scheduleNext();
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}
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}
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protected synchronized void scheduleNext() {
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if ((active = tasks.poll()) != null) {
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executor.execute(active);
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}
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}
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} |