[kaffe] gnu.java.nio.VMSelector implementation

[Rei Odaira]

Hi,

I'm trying to run Tomcat 5 with clustering support on Kaffe/jthread.

The current implementation of gnu.java.nio.VMSelector#select()
seems to directly invoke a system call "select()", instead of KSELECT().
Since the system call is not aware of jthread, Kaffe can stop
indefinitely when java.nio.channels.Selector#select() is called
with timeout == 0 (blocking mode).

Below is a simple testcase.

I think the previous implementation, which uses KSELECT(), would be better,
although it has several serious bugs.
Any thoughts?


Rei


##################################################
import java.net.*;
import java.nio.channels.*;

class TestSelector {

    TestSelector() {
	(new Runner()).start();
    }	

    void doSelect() {
	try {
	    ServerSocketChannel serverChannel = ServerSocketChannel.open();
	    ServerSocket serverSocket = serverChannel.socket();
	    Selector selector = Selector.open();
	    serverSocket.bind (new InetSocketAddress (InetAddress.getLocalHost(), 10001));
	    serverChannel.register (selector, SelectionKey.OP_ACCEPT);
	    selector.select(0);
	} catch (Exception ex) {
	}
    }

    public static void main(String[] args) {
	(new TestSelector()).doSelect();
    }

    class Runner extends Thread {
	public void run() {
	    int i = 0;
	    while (true) {
		if (i % 100000 == 0) {
		    System.out.println(i);
		}
		i++;
	    }
	}
    }
}
##################################################
> java TestSelector
0
100000
200000
300000
400000
500000
600000
700000
800000
900000
... (continues indefinitely)

> kaffe TestSelector
0
100000
(stops here)

##################################################