Handle.java

/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.iwebpp.libuvpp.handles;

import java.io.Closeable;
import java.util.Objects;

import com.iwebpp.libuvpp.LibUVPermission;

public abstract class Handle implements Closeable {

    protected final long pointer;
    protected final LoopHandle loop;

    protected Handle(final long pointer, final LoopHandle loop) {
        Objects.requireNonNull(loop);
        LibUVPermission.checkHandle();
        assert pointer != 0;
        this.pointer = pointer;
        this.loop = loop;
    }

    public void ref() {
        _ref(pointer);
    }

    public void unref() {
        _unref(pointer);
    }

    public boolean isClosing() {
        return _closing(pointer);
    }

    @Override
    public int hashCode() {
        return (int) ((pointer & 0xffffffffL) ^ ((pointer >> 32) & 0xffffffffL));
    }

    @Override
    public boolean equals(final Object other) {
        return other instanceof Handle && pointer == ((Handle) other).pointer;
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName() + "." + Long.toHexString(pointer);
    }

    private native void _ref(final long ptr);

    private native void _unref(final long ptr);

    private native boolean _closing(final long ptr);

}