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/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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import android.os.Binder;
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import android.os.RemoteException;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.TimeUnit;
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class ModeledExecutors {
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static Binder binder;
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private static void doTransact() {
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try {
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binder.transact(0, null, null, 0);
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} catch (RemoteException e) {
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}
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}
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// starvation via scheduling a transaction on UI thread
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public void postBlockingCallToUIThreadBad() {
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Executors.getForegroundExecutor()
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.execute(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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});
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}
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public void postBlockingCallToNonUIThreadOk() {
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Executors.getBackgroundExecutor()
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.execute(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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});
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}
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// starvation via posting a transaction on UI thread
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public void staticPostBlockingCallToUIThreadBad() {
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Executors.postOnUiThread(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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});
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}
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// starvation via running a transaction on UI thread
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public void staticRunBlockingCallToUIThreadBad() {
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Executors.runOnUiThread(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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});
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}
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// starvation via running a delayed transaction on UI thread
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public void staticPostDelayedBlockingCallToUIThreadBad() {
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Executors.postOnUiThreadDelayed(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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},
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1000L);
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}
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public void scheduleGuaranteedDelayedBlockingCallToNonUIThreadOk() {
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Executors.scheduleGuaranteedDelayed(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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},
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1000L,
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1000L);
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}
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Object monitorA, monitorB;
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public void scheduleGuaranteedDelayedDeadlockBad() {
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Executors.scheduleGuaranteedDelayed(
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new Runnable() {
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@Override
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public void run() {
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synchronized (monitorA) {
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synchronized (monitorB) {
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}
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}
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}
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},
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1000L,
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1000L);
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Executors.runOnUiThread(
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new Runnable() {
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@Override
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public void run() {
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synchronized (monitorB) {
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synchronized (monitorA) {
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}
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}
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}
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});
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}
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public void submitBlockingCallToUIThreadBad() {
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ExecutorService foregroundExecutor = (ExecutorService) Executors.getForegroundExecutor();
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foregroundExecutor.submit(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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});
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}
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public void scheduleBlockingCallToUIThreadBad() {
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ScheduledExecutorService foregroundExecutor =
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(ScheduledExecutorService) Executors.getForegroundExecutor();
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foregroundExecutor.schedule(
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new Runnable() {
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@Override
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public void run() {
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doTransact();
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}
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},
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1000L,
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TimeUnit.SECONDS);
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}
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public void submitBadCallableToUIThreadBad() {
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ExecutorService foregroundExecutor = (ExecutorService) Executors.getForegroundExecutor();
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foregroundExecutor.submit(
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new Callable<Object>() {
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@Override
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public Object call() {
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doTransact();
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return null;
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}
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});
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}
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}
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