001/*
002 * Copyright (C) Photon Vision.
003 *
004 * This program is free software: you can redistribute it and/or modify
005 * it under the terms of the GNU General Public License as published by
006 * the Free Software Foundation, either version 3 of the License, or
007 * (at your option) any later version.
008 *
009 * This program is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012 * GNU General Public License for more details.
013 *
014 * You should have received a copy of the GNU General Public License
015 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
016 */
017
018package org.photonvision.jni;
019
020public class QueuedFileLogger {
021    long m_handle = 0;
022
023    public QueuedFileLogger(String path) {
024        m_handle = QueuedFileLogger.create(path);
025    }
026
027    public String[] getNewlines() {
028        String newBuffer = null;
029
030        synchronized (this) {
031            if (m_handle == 0) {
032                System.err.println("QueuedFileLogger use after free");
033                return new String[0];
034            }
035
036            newBuffer = QueuedFileLogger.getNewLines(m_handle);
037        }
038
039        if (newBuffer == null) {
040            return new String[0];
041        }
042
043        return newBuffer.split("\n");
044    }
045
046    public void stop() {
047        synchronized (this) {
048            if (m_handle != 0) {
049                QueuedFileLogger.destroy(m_handle);
050                m_handle = 0;
051            }
052        }
053    }
054
055    private static native long create(String path);
056
057    private static native void destroy(long handle);
058
059    private static native String getNewLines(long handle);
060}