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Merge "USB MIDI: Use Thread.interrupt() to close threads" into tm-dev

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This commit is contained in:
Robert Wu
2022-05-19 23:02:19 +00:00
committed by Android (Google) Code Review
parent 9df49914b1 6cd937c488
commit 5596184a23
1 changed files with 48 additions and 12 deletions
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60
services/usb/java/com/android/server/usb/UsbDirectMidiDevice.java
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@@ -80,9 +80,13 @@ public final class UsbDirectMidiDevice implements Closeable {
// of cycles and not being permanently stuck.
private static final int BULK_TRANSFER_TIMEOUT_MILLISECONDS = 10;
// Arbitrary number for timeout when closing a thread
private static final int THREAD_JOIN_TIMEOUT_MILLISECONDS = 50;
private ArrayList<UsbDeviceConnection> mUsbDeviceConnections;
private ArrayList<ArrayList<UsbEndpoint>> mInputUsbEndpoints;
private ArrayList<ArrayList<UsbEndpoint>> mOutputUsbEndpoints;
private ArrayList<Thread> mThreads;
private UsbMidiBlockParser mMidiBlockParser = new UsbMidiBlockParser();
private int mDefaultMidiProtocol = MidiDeviceInfo.PROTOCOL_UMP_MIDI_1_0_UP_TO_64_BITS;
@@ -273,9 +277,10 @@ public final class UsbDirectMidiDevice implements Closeable {
// to USB MIDI for each USB output.
mUsbMidiPacketConverter = new UsbMidiPacketConverter(mNumOutputs);
mUsbDeviceConnections = new ArrayList<UsbDeviceConnection>(mUsbInterfaces.size());
mInputUsbEndpoints = new ArrayList<ArrayList<UsbEndpoint>>(mUsbInterfaces.size());
mOutputUsbEndpoints = new ArrayList<ArrayList<UsbEndpoint>>(mUsbInterfaces.size());
mUsbDeviceConnections = new ArrayList<UsbDeviceConnection>();
mInputUsbEndpoints = new ArrayList<ArrayList<UsbEndpoint>>();
mOutputUsbEndpoints = new ArrayList<ArrayList<UsbEndpoint>>();
mThreads = new ArrayList<Thread>();
for (int interfaceIndex = 0; interfaceIndex < mUsbInterfaces.size(); interfaceIndex++) {
ArrayList<UsbEndpoint> inputEndpoints = new ArrayList<UsbEndpoint>();
@@ -327,7 +332,7 @@ public final class UsbDirectMidiDevice implements Closeable {
mInputUsbEndpoints.get(connectionIndex).get(endpointIndex);
final int portFinal = portNumber;
new Thread("UsbDirectMidiDevice input thread " + portFinal) {
Thread newThread = new Thread("UsbDirectMidiDevice input thread " + portFinal) {
@Override
public void run() {
final UsbRequest request = new UsbRequest();
@@ -335,9 +340,12 @@ public final class UsbDirectMidiDevice implements Closeable {
request.initialize(connectionFinal, endpointFinal);
byte[] inputBuffer = new byte[endpointFinal.getMaxPacketSize()];
while (true) {
if (Thread.currentThread().interrupted()) {
Log.w(TAG, "input thread interrupted");
break;
}
// Record time of event immediately after waking.
long timestamp = System.nanoTime();
if (!mIsOpen) break;
final ByteBuffer byteBuffer = ByteBuffer.wrap(inputBuffer);
if (!request.queue(byteBuffer)) {
Log.w(TAG, "Cannot queue request");
@@ -382,8 +390,9 @@ public final class UsbDirectMidiDevice implements Closeable {
}
Log.d(TAG, "input thread exit");
}
}.start();
};
newThread.start();
mThreads.add(newThread);
portNumber++;
}
}
@@ -402,18 +411,23 @@ public final class UsbDirectMidiDevice implements Closeable {
final int portFinal = portNumber;
final MidiEventScheduler eventSchedulerFinal = mEventSchedulers[portFinal];
new Thread("UsbDirectMidiDevice output thread " + portFinal) {
Thread newThread = new Thread("UsbDirectMidiDevice output thread " + portFinal) {
@Override
public void run() {
while (true) {
if (Thread.currentThread().interrupted()) {
Log.w(TAG, "output thread interrupted");
break;
}
MidiEvent event;
try {
event = (MidiEvent) eventSchedulerFinal.waitNextEvent();
} catch (InterruptedException e) {
// try again
continue;
Log.w(TAG, "event scheduler interrupted");
break;
}
if (event == null) {
Log.w(TAG, "event is null");
break;
}
@@ -446,8 +460,9 @@ public final class UsbDirectMidiDevice implements Closeable {
}
Log.d(TAG, "output thread exit");
}
}.start();
};
newThread.start();
mThreads.add(newThread);
portNumber++;
}
}
@@ -523,6 +538,27 @@ public final class UsbDirectMidiDevice implements Closeable {
private void closeLocked() {
Log.d(TAG, "closeLocked()");
// Send an interrupt signal to threads.
for (Thread thread : mThreads) {
if (thread != null) {
thread.interrupt();
}
}
// Wait for threads to actually stop.
for (Thread thread : mThreads) {
if (thread != null) {
try {
thread.join(THREAD_JOIN_TIMEOUT_MILLISECONDS);
} catch (InterruptedException e) {
Log.w(TAG, "thread join interrupted");
break;
}
}
}
mThreads = null;
for (int i = 0; i < mEventSchedulers.length; i++) {
mMidiInputPortReceivers[i].setReceiver(null);
mEventSchedulers[i].close();