/*
This file is part of JOP, the Java Optimized Processor
see <http://www.jopdesign.com/>
Copyright (C) 2008, Christof Pitter
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmp;
import com.jopdesign.sys.*;
import java.util.Random;
public class TestSync {
static int cnt = 0;
static Object mutex;
public static void main(String[] args) {
int cpu_id;
cpu_id = Native.rdMem(Const.IO_CPU_ID);
if (cpu_id == 0x00000000)
{
mutex = new Object();
System.out.println("Synchronization Test!");
Native.wrMem(0x00000001, Const.IO_SIGNAL);
Random rand = new Random();
for (;;) {
synchronized (mutex)
{
int i = ++cnt;
if (i != cnt)
{
System.err.println("Synchronization problem.");
}
}
int r = rand.nextInt() & 0xFFFF;
for(int j=0; j<r; j++);
}
}
else
{
if (cpu_id == 0x00000001)
{
int blink = 0;
for (;;)
{
synchronized (mutex)
{
int i = --cnt;
if (i != cnt)
{
blink = ~blink;
Native.wr(blink, Const.IO_WD);
}
}
}
}
}
}
}