[Assorted-commits] SF.net SVN: assorted:[910] sandbox/trunk/src/java

[<yan...@us...>]

Revision: 910
          http://assorted.svn.sourceforge.net/assorted/?rev=910&view=rev
Author:   yangzhang
Date:     2008-07-29 20:47:10 +0000 (Tue, 29 Jul 2008)

Log Message:
-----------
added jni demo and benchmark

Added Paths:
-----------
    sandbox/trunk/src/java/jni/
    sandbox/trunk/src/java/jni/Bench/
    sandbox/trunk/src/java/jni/Bench/Bench.cc
    sandbox/trunk/src/java/jni/Bench/Bench.java
    sandbox/trunk/src/java/jni/Bench/Makefile
    sandbox/trunk/src/java/jni/HelloWorld/
    sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.cc
    sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.java
    sandbox/trunk/src/java/jni/HelloWorld/Makefile

Added: sandbox/trunk/src/java/jni/Bench/Bench.cc
===================================================================
--- sandbox/trunk/src/java/jni/Bench/Bench.cc	                        (rev 0)
+++ sandbox/trunk/src/java/jni/Bench/Bench.cc	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,10 @@
+#include <jni.h>
+#include <iostream>
+#include "Bench.h"
+
+using namespace std;
+
+JNIEXPORT void JNICALL
+Java_Bench_foo(JNIEnv *env, jclass cls)
+{
+}

Added: sandbox/trunk/src/java/jni/Bench/Bench.java
===================================================================
--- sandbox/trunk/src/java/jni/Bench/Bench.java	                        (rev 0)
+++ sandbox/trunk/src/java/jni/Bench/Bench.java	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,15 @@
+public class Bench {
+  private static native void foo();
+  public static void main(String[] args) {
+    int count = 1000000;
+    long start = System.nanoTime();
+    for (int i = 0; i < count; i++)
+      foo();
+    long end = System.nanoTime();
+    System.out.println(end - start + " ns");
+    System.out.println((((double) end - start) / count) + " ns/call");
+  }
+  static {
+    System.loadLibrary("Bench");
+  }
+}

Added: sandbox/trunk/src/java/jni/Bench/Makefile
===================================================================
--- sandbox/trunk/src/java/jni/Bench/Makefile	                        (rev 0)
+++ sandbox/trunk/src/java/jni/Bench/Makefile	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,19 @@
+all: libBench.so
+	java -Djava.library.path=. Bench
+
+libBench.so: Bench.cc Bench.h
+	g++ -shared -fPIC \
+		-I/usr/lib/jvm/java-6-openjdk/include/ \
+		-I/usr/lib/jvm/java-6-openjdk/include/linux \
+		-o libBench.so Bench.cc
+
+Bench.h: Bench.class
+	javah -jni Bench
+
+Bench.class: Bench.java
+	javac Bench.java
+
+clean:
+	rm -f libBench.so Bench.h Bench.class
+
+.PHONY: clean

Added: sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.cc
===================================================================
--- sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.cc	                        (rev 0)
+++ sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.cc	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,12 @@
+#include <jni.h>
+#include <iostream>
+#include "HelloWorld.h"
+
+using namespace std;
+
+JNIEXPORT void JNICALL
+Java_HelloWorld_print(JNIEnv *env, jobject obj)
+{
+  cout << "Hello World!" << endl;
+  return;
+}

Added: sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.java
===================================================================
--- sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.java	                        (rev 0)
+++ sandbox/trunk/src/java/jni/HelloWorld/HelloWorld.java	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,9 @@
+public class HelloWorld {
+  private native void print();
+  public static void main(String[] args) {
+    new HelloWorld().print();
+  }
+  static {
+    System.loadLibrary("HelloWorld");
+  }
+}

Added: sandbox/trunk/src/java/jni/HelloWorld/Makefile
===================================================================
--- sandbox/trunk/src/java/jni/HelloWorld/Makefile	                        (rev 0)
+++ sandbox/trunk/src/java/jni/HelloWorld/Makefile	2008-07-29 20:47:10 UTC (rev 910)
@@ -0,0 +1,19 @@
+all: libHelloWorld.so
+	java -Djava.library.path=. HelloWorld
+
+libHelloWorld.so: HelloWorld.cc HelloWorld.h
+	g++ -shared -fPIC \
+		-I/usr/lib/jvm/java-6-openjdk/include/ \
+		-I/usr/lib/jvm/java-6-openjdk/include/linux \
+		-o libHelloWorld.so HelloWorld.cc
+
+HelloWorld.h: HelloWorld.class
+	javah -jni HelloWorld
+
+HelloWorld.class: HelloWorld.java
+	javac HelloWorld.java
+
+clean:
+	rm -f libHelloWorld.so HelloWorld.h HelloWorld.class
+
+.PHONY: clean


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