我在哪里可以找到Java库中`native`方法的源代码？

Question

In the sun.misc package, I saw these methods under Unsafe class.

public final native boolean compareAndSwapObject(Object var1, long var2, Object var4, Object var5);

public final native boolean compareAndSwapInt(Object var1, long var2, int var4, int var5);

public final native boolean compareAndSwapLong(Object var1, long var2, long var4, long var6);

It seems that these methods are atomic and are written in C, but I can't find the source code for these method on Github.. Does anyone have any ideas about this? How can I find an open-source implementation for these methods easily?

Answer 1

你可以在这里查看OpenJDK代码： http ： //hg.openjdk.java.net/jdk8/jdk8/hotspot/file/tip/src/share/vm/prims/unsafe.cpp

Answer 2

You can download OpenJdk source code JDK7 . There is a folder share(jdk\\src\\share) where you can get source code. The folder native (jdk\\src\\share\\native) has source written (in c and c++):

1. jdk\\src\\linux source for linux.
2. jdk\\src\\windows source for windows.
3. jdk\\src\\solaris souce for solaris.
4. jd\\src\\share common source.

Answer 3

Thanks @Buddy

Finally I find source code in the Github mirror for jdk7-hotspot here:

https://github.com/openjdk-mirror/jdk7u-hotspot/blob/master/src/share/vm/prims/unsafe.cpp

Answer 4

Your question specifically asks for java 8 . Run this from command line (you need Mercurial client installed)

hg clone http://hg.openjdk.java.net/jdk8/jdk8

This will get you source code for HotSpot and everything else.