I'm using netbeans 7.4 / jdk 1.7u51
I downloaded the jar for JNA from official site, in version 4.0.0.
I have an internally developped DLL whose interface is in plain C, which loads perfectly well with ctypes
in python
. This dll is compiled in release with visual 2010, whose runtime are in path.
D:\fl006\Downloads>dir D:\deploy\SpotLight\spotlight-1488\PasanBusLibrary.dll
Directory of D:\deploy\SpotLight\spotlight-1488
29.01.2014 11:13 1'690'112 PasanBusLibrary.dll
I tried to load it in java with jna:
public interface CLibrary extends Library {
(...snip...)
void pasanIpcInitializeLibrary(String xClient, String xBusName, int xTimeout);
void pasanIpcTerminateLibrary();
}
public static void main(String[] args) {
NativeLibrary.addSearchPath("PasanBusLibrary","D:\\deploy\\SpotLight\\spotlight-1488");
CLibrary Bus = (CLibrary) Native.loadLibrary("PasanBusLibrary",CLibrary.class);
(... snip ...)
This is basically an out of the book standard dll load, from a custom location.
When activating jna debug, I see the following :
run:
Looking in classpath from sun.misc.Launcher$AppClassLoader@714a8f44 for /com/sun/jna/win32-x86-64/jnidispatch.dll
Found library resource at jar:file:/D:/code/perso/TestWrapperBus/jna-4.0.0.jar!/com/sun/jna/win32-x86-64/jnidispatch.dll
Looking for library 'PasanBusLibrary'
Adding paths from jna.library.path: null
Trying D:\deploy\SpotLight\spotlight-1488\PasanBusLibrary.dll
Adding system paths: []
Trying D:\deploy\SpotLight\spotlight-1488\PasanBusLibrary.dll
Looking for lib- prefix
Trying libPasanBusLibrary.dll
Looking in classpath from sun.misc.Launcher$AppClassLoader@714a8f44 for PasanBusLibrary
Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'PasanBusLibrary': Native library (win32-x86-64/PasanBusLibrary.dll) not found in resource path ([file:/D:/code/perso/TestWrapperBus/jna-4.0.0.jar, file:/D:/code/perso/TestWrapperBus/jna-platform-4.0.0.jar, file:/D:/code/perso/TestWrapperBus/build/classes/])
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:271)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:398)
at com.sun.jna.Library$Handler.<init>(Library.java:147)
at com.sun.jna.Native.loadLibrary(Native.java:412)
at com.sun.jna.Native.loadLibrary(Native.java:391)
at testwrapperbus.TestWrapperBus.main(TestWrapperBus.java:39)
It looks it looks through the location I gave and somehow discards it. I tried different folders and I got same behaviour, there is no obvious file system right issue (dll is RW from all users)
Any clue on what I'm missing, I'm kind of stuck currently...
EDIT
- if I load "msvcrt" this is working nice to cll printf
- my dll has some dependencies, all of them hosted in
c:\windows\system32
(standard runtime, dynamically linked)