🚀 go-pugleaf

I'm trying to use JNI to call into a DLL I've written.

I appear to be able to correctly put the DLL in my path, so that it is
seen, but I don't manage to connect up with the routine in the
DLL. I'm attaching the Java declaration for the native interface, the
C++ declaration (I've tried it both with and without the EXTERN_C, to
see if that made a difference), and run-time output showing the error.

I know I'm doing something silly, but what? Does the fact that the
error says "java.lang.UnsatisfiedLinkError: initializeEngine" mean
it's really looking for an entry point named 'initializeEngine',
rather than "Java_OMTool_scripting_PerlScriptingEngine_initializeEngine",
which is what javah generates?

----------------
    //PerlScriptingEngine engine =
(PerlScriptingEngine)ScriptingEngine.newScriptingEngine("omtool.scripting.Pe
rlScriptingEngine");
    ScriptingEngine engine =
ScriptingEngine.newScriptingEngine("omtool.scripting.PerlScriptingEngine");
    engine.initializeEngine();
----------------
package omtool.scripting;

public class PerlScriptingEngine extends ScriptingEngine {
    public PerlScriptingEngine() {
        System.out.println("Engine created!");
    }

    public native void initializeEngine();
    public native void shutdownEngine();
    public native void executeScript(String script);
}
----------------
EXTERN_C JNIEXPORT void JNICALL
Java_OMTool_scripting_PerlScriptingEngine_initializeEngine
(JNIEnv *curEnv, jobject curObj) {
----------------
First, show error if DLL not in path

>C:\Personal\Java\omtool>java omtool.Application
>java.lang.UnsatisfiedLinkError: no PerlScriptingEngine in java.library.path
> at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1133)
> at java.lang.Runtime.loadLibrary0(Runtime.java:463)
> at java.lang.System.loadLibrary(System.java:745)
> at omtool.Application.<clinit>(Application.java:8)
>Exception in thread "main"
>C:\Personal\Java\omtool>set
path=c:\personal\C++_Projects\OMTool_Perl_Scripting_Engine\PerlScriptingEngi
ne\;%path%

Now, DLL is in path, but entry is not found -- note that it is asking
for simply 'initializeEngine'

>C:\Personal\Java\omtool>java omtool.Application
>java omtool.Application
>Engine created!
>java.lang.UnsatisfiedLinkError: initializeEngine
> at omtool.Application.main(Application.java:13)
>Exception in thread "main"
>C:\Personal\Java\omtool>DUMPBIN
C:\PERSONAL\C++_Projects\OMTool_Perl_Scripting_Engine\PerlScriptingEngine\PE
RLSCRIPTINGENGINE.DLL /EXPORTS
>Microsoft (R) COFF Binary File Dumper Version 6.00.8168
>Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
>
>
>Dump of file
C:\PERSONAL\C++_Projects\OMTool_Perl_Scripting_Engine\PerlScriptingEngine\PE
RLSCRIPTINGENGINE.DLL
>
>File Type: DLL
>
>  Section contains the following exports for PerlScriptingEngine.dll
>
>           0 characteristics
>    36522E8F time date stamp Tue Nov 17 21:18:55 1998
>        0.00 version
>           1 ordinal base
>           3 number of functions
>           3 number of names
>
>    ordinal hint RVA      name
>
>          1    0 000029D0
_Java_OMTool_scripting_PerlScriptingEngine_executeScript@12

Dump shows that full name is
_Java_OMTool_scripting_PerlScriptingEngine_initializeEngine

>          2    1 00002910
_Java_OMTool_scripting_PerlScriptingEngine_initializeEngine@8
>          3    2 00002950
_Java_OMTool_scripting_PerlScriptingEngine_shutdownEngine@8
>
>  Summary
>
>        1000 .data
>        2000 .rdata
>        1000 .reloc
>        7000 .text