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fight java multi-threading

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This commit is contained in:
mila@ringwald.ch 2015-02-19 14:40:48 +00:00
parent 818187fe1b
commit 50400aa45c
1 changed files with 35 additions and 13 deletions
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48
java/src/com/bluekitchen/btstack/BTstackClient.java
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@ -15,6 +15,7 @@ public class BTstackClient {
private volatile SocketConnection socketConnection;
private PacketHandler packetHandler;
private boolean connected;
private int logicTime = 1;
private Thread rxThread;
private String unixDomainSocketPath;
private int tcpPort;
@ -39,6 +40,8 @@ public class BTstackClient {
public boolean connect(){
rxThread = null;
if (tcpPort == 0){
try {
Class<?> clazz = Class.forName("com.bluekitchen.btstack.SocketConnectionUnix");
@ -66,12 +69,16 @@ public class BTstackClient {
connected = socketConnection.connect();
if (!connected) return false;
logicTime++;
final int rxThreadId = logicTime;
final SocketConnection threadSocketConnection = socketConnection;
rxThread = new Thread(new Runnable(){
@Override
public void run() {
while (socketConnection != null){
Packet packet = socketConnection.receivePacket();
while (logicTime == rxThreadId){
Packet packet = threadSocketConnection.receivePacket();
if (Thread.currentThread().isInterrupted()){
System.out.println("Rx Thread: exit via interrupt, thread id " + rxThreadId);
return;
}
if (packet == null) {
@ -95,7 +102,7 @@ public class BTstackClient {
break;
}
}
System.out.println("Rx Thread: Interrupted");
System.out.println("Rx Thread: exit via logic time change, thread id " + rxThreadId);
}
});
rxThread.start();
@ -118,18 +125,33 @@ public class BTstackClient {
public void disconnect(){
if (socketConnection == null) return;
if (rxThread == null) return;
// signal rx thread to stop
rxThread.interrupt();
// wait for thread stopped
try {
rxThread.join();
} catch (InterruptedException e){
System.out.println("Unexpected interrupted execption waiting for receive thread to terminate");
e.printStackTrace();
logicTime++;
// check if we're called on rx thread
if (Thread.currentThread() != rxThread){
// signal rx thread to stop
rxThread.interrupt();
// unblock read by sending an arbitrary command
if (this instanceof BTstack){
BTstack btstack = (BTstack) this;
btstack.BTstackGetState();
}
// wait for thread to stop
try {
rxThread.join();
} catch (InterruptedException e){
System.out.println("Unexpected interrupted execption waiting for receive thread to terminate");
e.printStackTrace();
}
}
// disconnect socket
// disconnect socket -> triggers IOException on read
socketConnection.disconnect();
// done
socketConnection = null;
}