[platform-swt-dev] Build Custom JNI Functions in SWT

["Belcher, Josh" <Josh.Belcher@xxxxxxxxxx>]

Hi All,

I am attempting to make a custom JNI function that integrates with swt - I modified OS.java and OS_Custom.c (See code below).  After I run build.xml (which says "BUILD SUCCESSFUL") I attempt to call my new function but get the following error:

Exception in thread "main" java.lang.UnsatisfiedLinkError: org.eclipse.swt.internal.win32.OS.newFunction()[I

Am I missing something to be able to write my own custom function?  Is there a good example of being able to do so? It seems as though after 3 days of searching that there wouldn't be an answer, but I hope I'm close.  Thanks.

Josh


OS.java Added:

/** @method flags=no_gen */
private static final native int[] newFunction();
	
OS_Custom.c Added:

#ifndef NO_newFunction
JNIEXPORT jintArray JNICALL OS_NATIVE(newFunction)
	(JNIEnv *env, jclass that)
{
	jintArray iarr = (*env)->NewIntArray(env, 256); //just to test
	int i;

	if (iarr == NULL) 
	{
		return NULL; /* out of memory error thrown */
	}
	jint tmp[256];
	for (i = 0; i < 256; i++)
	{
		tmp[i] = i + 100;
	}
	(*env)->SetIntArrayRegion(env, iarr, 0, 256, tmp);

	return iarr;
}
#endif