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package com.diozero.util;
/*-
* #%L
* Organisation: diozero
* Project: Device I/O Zero - Core
* Filename: MmapIntBuffer.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.io.Closeable;
import java.nio.ByteOrder;
import java.nio.IntBuffer;
public class MmapIntBuffer implements Closeable {
private MmapByteBuffer mmapByteBuffer;
private IntBuffer intBuffer;
public MmapIntBuffer(String file, int offset, int pageSize, ByteOrder byteOrder) {
mmapByteBuffer = MmapBufferNative.createMmapBuffer(file, offset, pageSize);
intBuffer = mmapByteBuffer.getBuffer().order(byteOrder).asIntBuffer();
}
@Override
public void close() {
MmapBufferNative.closeMmapBuffer(mmapByteBuffer.getFd(), mmapByteBuffer.getAddress(),
mmapByteBuffer.getLength());
mmapByteBuffer = null;
intBuffer = null;
}
@Deprecated()
public IntBuffer getIntBuffer() {
return intBuffer;
}
public int get(int index) {
return intBuffer.get(index);
}
public int get(int index, int mask) {
return intBuffer.get(index) & mask;
}
public int getShiftRight(int index, int shift, int mask) {
return (intBuffer.get(index) >> shift) & mask;
}
public void put(int index, int i) {
intBuffer.put(index, i);
}
}
