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JavaCAN is a binding to Linux' socketcan subsystem that feels native to Java developers. The core module provides the basic socketcan bindings.
/*
* The MIT License
* Copyright © 2018 Phillip Schichtel
*
* 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.
*/
package tel.schich.javacan;
import tel.schich.javacan.platform.Platform;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class JavaCAN {
private static volatile boolean initialized = false;
public static final String LIB_NAME = "javacan-core";
/**
* Initializes the library by loading the native library.
*/
public synchronized static void initialize() {
if (initialized) {
return;
}
Platform.loadNativeLibrary(LIB_NAME, JavaCAN.class);
initialized = true;
}
/**
* A simple helper to allocate a {@link ByteBuffer} as needed by the underlying native code.
*
* @param capacity the capacity of the buffer.
* @return the buffer in native byte order with the given capacity.
*/
public static ByteBuffer allocateOrdered(int capacity) {
return allocateUnordered(capacity).order(ByteOrder.nativeOrder());
}
/**
* A simple helper to allocate a {@link ByteBuffer} as needed by the underlying native code.
*
* @param capacity the capacity of the buffer.
* @return the buffer in default (unspecified) byte order with the given capacity.
*/
public static ByteBuffer allocateUnordered(int capacity) {
return ByteBuffer.allocateDirect(capacity);
}
}
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