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/*
* Navit, a modular navigation system.
* Copyright (C) 2005-2008 Navit Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
package org.navitproject.navit;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
class NavitWatch implements Runnable {
private static WatchHandler sHandler = new WatchHandler();
private Thread mThread;
private boolean mRemoved;
private long mWatchFunc;
private int mWatchFd;
private int mWatchCond;
private long mWatchCallbackid;
private boolean mCallbackPending;
private Runnable mCallbackRunnable;
NavitWatch(long func, int fd, int cond, long callbackid) {
Log.d("NavitWatch","Creating new thread for " + fd + " " + cond + " from current thread "
+ java.lang.Thread.currentThread().getName());
mWatchFunc = func;
mWatchFd = fd;
mWatchCond = cond;
mWatchCallbackid = callbackid;
final NavitWatch navitwatch = this;
mCallbackRunnable = new Runnable() {
public void run() {
navitwatch.callback();
}
};
mThread = new Thread(this, "poll thread");
mThread.start();
}
public native void poll(long func, int fd, int cond);
public native void watchCallback(long id);
public void run() {
for (; ; ) {
// Log.e("NavitWatch","Polling "+watch_fd+" "+watch_cond + " from "
// + java.lang.Thread.currentThread().getName());
poll(mWatchFunc, mWatchFd, mWatchCond);
// Log.e("NavitWatch","poll returned");
if (mRemoved) {
break;
}
mCallbackPending = true;
sHandler.post(mCallbackRunnable);
try {
// Log.e("NavitWatch","wait");
synchronized (this) {
if (mCallbackPending) {
this.wait();
}
}
// Log.e("NavitWatch","wait returned");
} catch (Exception e) {
Log.e("NavitWatch", "Exception " + e.getMessage());
}
if (mRemoved) {
break;
}
}
}
private void callback() {
// Log.e("NavitWatch","Calling Callback");
if (!mRemoved) {
watchCallback(mWatchCallbackid);
}
synchronized (this) {
mCallbackPending = false;
// Log.e("NavitWatch","Waking up");
this.notify();
}
}
public void remove() {
mRemoved = true;
mThread.interrupt();
}
static class WatchHandler extends Handler {
public void handleMessage(Message m) {
Log.d("NavitWatch", "Handler received message");
}
}
}
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