Using a dll in the JNI dll defined

Hello,
I'm new to JNI and I have managed to compile and run a simple Hello world program, now this is my problem:
The C++ code I'm using need to make calls to some dlls (msado15.dll and cdoex.dl) so that I have a function doing this (I have tested the function in pure C++ and it works):
#import "msado15.dll" no_namespace rename("EOF","adoEOF")
#import "cdoex.dll" no_namespace
* Class: AdaptorNative
* Method: login
* Signature: (Ljava/lang/String;)V
JNIEXPORT void JNICALL Java_AdaptorNative_login
(JNIEnv *env, jobject obj_this, jstring userId)
printf("login\n");
// Try to retrieve a pointer on a Connection object
ConnectionPtr conn(_uuidof(Connection));
When I try to call the function in my JAVA code and run it, I have the following error:
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : unknown exception code occurred at PC=0x77e7f142
Function name=RaiseException
Library=C:\WINNT\system32\KERNEL32.DLL
Could anyone please help me? I have tried to include the path of the msado.dll and cdoex.dll in the java.library.path but it does not change anything.
Thanks
Tanguy

Thanks for replying but this does not seem to work.
* I have set the path to this libraries in the PATH and LIBPATH environment variables. (I'm on windows 2000 Server)
* I have loaded explicitly the library
* I have set the java.library.path variable in the VM to: .;paths to dlls
and I have still the same error except that now in the list of loaded libraries they seem to be loaded:
Dynamic libraries:
0x08DB0000 - 0x08DBD000 C:\SyncExchangeNative\syncmlclient_dbadaptor_SyncExchangeAdaptor.dll
0x620B0000 - 0x62460000 C:\Program Files\Fichiers communs\Microsoft Shared\CDO\cdoex.dll
0x1F440000 - 0x1F4B7000 C:\Program Files\Fichiers communs\System\ado\msado15.dll
I do not know if this is important but the msado.dll and cdoex.dll liberaries are for COM objects. They seem to define tlh and tld files.
I'm really desperate to find an answer with this... Please help me!
Thanks a lot
Tanguy

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To add the JNI dll to the jar file and use the dll inside the jar file

Hi to everybody,
I am new to java.
I want to add the JNI dll to the jar file and use it in the java class.
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Please help me.
Thanks in advance.
Regards,
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can't be done because none of the known operating systems support reading binary libraries from .jar files ... you can add the binary to the jar but then you have to extract it...
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How to use multiple instances of the same dll ?

Hi,
I'd like to use multiple instances of a jni dll . I have created
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Hi, :)
and I would like each thread to access a different
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How to link a wrapper DLL to the target DLL

I appreciate your help!
Question:
In my project, I need to deal with a hybrid programming of C++ and Labview. The C++ part has been encoded into a DLL, which aims to do a complex mathematics. The main function in the DLL has the following form:
                          float RateEqCalculate(class CLaserPulse *Pulse, class CMaterial *Material, class CThresh *ThreshPara, class CRateResults &r);
The four arguments are all of the class type. The first three arguments are used to input parameters to the function and the last one is used to record the process of computation. For example: class CLaserPulse is composed by several numerics and two functions as the following form:
class CLaserPulse
public:
float fDuration;
float fWave;
float fNA;
float fRefrIndex;                                    // Refractive Index
float fAbsCoeff;                                     // Absorption coefficient [1/m]
CLaserPulse();
virtual ~CLaserPulse();
virtual double Shape(double dTime);       // gives Temporal Shape
float SpotDiameter();                          // Calculate Spotdiameter
As in labview "class" cannot be accepted as an argument of the "Library Function Node" directly, a wrapper DLL is required to translate the "class" to the type labview can understand. The following link is a good illustration of this process. http://labviewwiki.org/DLL/shared_library Given the argument class CLaserPulse has been converted into the wrapper DLL by the method from the link, how can I later link this wrapper DLL to the target DLL. My understanding is like this:
                                                                                            Target DLL
                                                                               float RateEqCalculate(
  class CLaserPulse  ->   wrapper DLL       .........linking.........        class CLaserPulse,
  class CMaterial      ->   wrapper DLL       .........linking.........       class CMaterial,
  class CThresh        ->   wrapper DLL       .........linking.........        class CThresh ,
  class CRateResults  ->   wrapper DLL     .........linking.........        class CRateResults );
Am I right? Four wrapper DLL to four class type arguments?
Many thanks!!!

Hello Rolf and Christian:
Thank you for your suggestions! I'm now working on it. I appreciate your continuous help!!
I'll briefly summarize my question here:
In the original DLL, which is compiled by VC++ 6.0 and named RateEquation.dll, three class types (CLaserPulse, CMaterial& CThresh) are inclueded to do parameter exchanges; one class type is designed to save the calculation results(CRateResults);one main function to do the calculation and save the results as following form:
float RateEqCalculate(class CLaserPulse*, class CMaterial*, class CThresh*, class CRateResults &r);
My question now is the initialization of the struct type and the communication between this type with labview.
I'll take class CMaterial as an example to show how I made it into wrapper DLL.Original class CMaterial is defined as following:
class CMaterial
public:
float AbsorberGap;
float BandGap;
float CollTime;
float ElDensity; float RefractiveIndex;
float AbsorptionCoeff;
float MoleculeMass;
float Density;
float HeatCapacity;
float HeatConductivity;  float TAmbient;
CMaterial();
virtual ~CMaterial();
  In a wrapper dll it's like this:
WrapperDll.h
extern "C" { /*using a C compiler*/            //Using a C compiler to write the wrapper DLL
#endif
struct RATEEQUATION_API CMaterial{
  //Electronical properties
  float AbsorberGap;
  float BandGap;
  float CollTime;
  float ElDensity;
  //Optical properties
  float RefractiveIndex;
  float AbsorptionCoeff;
  //Other properties
  float MoleculeMass;
  float Density;
  float HeatCapacity;
  float HeatConductivity;
  float TAmbient;
typedef struct CMaterial CMaterial;                                             /* make the class opaque to the wrapper*/
RATEEQUATION_API CMaterial* creat_CMaterial(void);
RATEEQUATION_API void destroy_CMaterial(CMaterial* LV_ref);
#ifdef __cplusplus
#endif
WrapperDll.cpp
RATEEQUATION_API CMaterial* creat_CMaterial(void)
       return new CMaterial();
RATEEQUATION_API void destroy_CMaterial(CMaterial* LV_ref)
       delete LV_ref;
In function creat_CMaterial(), one can see the constructor of class CMaterial is called. As struct type CMaterial has the same memory layout as class type CMaterial, so it’s safe and possible to return a class CMaterial* to struct CMaterial* and it’s initialized by the default values in the class constructor. Now I’m confused by how one communicates between labview and struct CMaterial. For example, if I would like to change the parameter _CMaterial-> BandGap=6.5eV to 8eV. How to make it? My feeling is I need a cluster type from Labview as an input in the function creat_CMaterial:
                          CMaterial* creat_CMaterial(cluster_LV*)
Many thanks!
Message Edited by Kuo on 09-15-2009 09:56 AM
Message Edited by Kuo on 09-15-2009 09:59 AM

Could not load DLL or External library "c:\folder\123.dll" - This DLL requires the following DLL which could not be found or loaded: abc.dll (Not Found)

I am having an issue when I try to run a Test Stand sequence that calls a CVI DLL. The error I get is the subject of this post.
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I think, http://msdn2.microsoft.com/en-us/library/7d83bc18(VS.80).aspx will give you an idea how to solve the problem

Using cl.exe of visualstudio to create a dll for the jni

In the sun site I saw to create a dynamic link library
On Win32, the following command builds a dynamic link library hello.dll using Microsoft Visual C++ 4.0:
cl -Ic:\java\include -Ic:\java\include\win32
-LD HelloWorldImp.c -Fehello.dll
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I have visual studio installed in
C:\Program Files\Microsoft Visual Studio\
there is a win32 dir in this visual studio in
C:\Program Files\Microsoft Visual Studio\Common\VSS
instead of the "include" inthe above mentioned "cl" command what do I write? Thanks.

I know the way via spool, you'll need to SUBMIT ... TO SAP-SPOOL instead of EXPORTING LIST TO MEMORY, grab the spool number RQIDENT from table TSP01, then call function CONVERT_ABAPSPOOLJOB_2_PDF.
Thomas

Jdev crash when loading JNI dll

Greetings:
I have the following msg when I either
click in "Design" tab or start debugger:
-------------- cut here -------------
JniPortal for D:\JDeveloper\java1.2\jre\bin\OJVM\jvm.dll reported
Native Library D:\JDeveloper\java1.2\bin\JTACCDLL.dll already loaded in another classloader
java.lang.UnsatisfiedLinkError: Native Library D:\JDeveloper\java1.2\bin\JTACCDLL.dll already loaded in another classloader
void java.lang.ClassLoader.resolveClass0(java.lang.Class)
void java.lang.ClassLoader.resolveClass(java.lang.Class)
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java.lang.Class borland.jbuilder.jot.ClassManager.loadClass(java.lang.String, boolean)
java.lang.Class borland.jbuilder.jot.JotPackageManager.loadClass(java.lang.String, boolean)
int borland.jbuilder.uidesigner.$491.getType(borland.jbuilder.cmt.CmtSubcomponent, borland.jbuilder.cmt.CmtComponents)
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void oracle.jdeveloper.addin.CustomViewer.changeUrl(java.lang.String)
void oracle.jdeveloper.addin.JavaMasterViewer_JavaDispatch.invoke(int, borland.javaport.JavaCallStack)
The jtaccdll.dll is my JNI dll. I am not sure
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screen objects.
Before I put it in that place JDev was
complaining that the dll is missing and
refused to do anything (run debugger at all).
Did anybody figured how to fix it? JDev
is v3.1.1.2.
TIA,
V.
null

jasro wrote:
Could you elaborate a little bit? Maybe provide an example? How exactly should I rename the jni wrapper functions?1. Run javah again.
2. Verify that the signatures in the h file match those in the c/cpp file.
3. Include the h file in the c/cpp file.

I have uninstalled and reinstalled the new iTunes but it still will not work. I keep getting the error mesage relating to MSVCR80.dll, the installation error 7 (windows error 126). I have tried moving and removing the dll files including the QTMovie dll

I have tried uninstalling and reinstalling iTunes 15 times regarding the latest release and still get the MSVCR80.dll and Error 7 (Windows error 126) messages.
I have tried moving the dll filesincluding the QTMovie dll file to now avail. Can anyone please help, as I am sure you all, like me, have thousnads of dollars and songs invested in this system and need a fix fast. Can anyone please help???

Dear avid iTunes users - I have cracked it!!!
The response from Apple/iTunes was extremely poor and did not solve the problem.
I have a look in msconfig and observed which applications/services were running - one of which was the 'Apple Application Support'
So ... I had a look at what was in this folder and found the APS Daemon.exe file causing all the trouble.
So ... I simply deleted the Apple folder found in C:\program files\common files\.
I did a restart and did not get the MSCVCR80.dll or Error 7 (windows 126) error messages.
I reinstalled the current version of iTunes (for the 16th time!)
Hey presto!!!
IT WORKED :-O Woooohooo!!!
So ... to all those smarty-pants boffin-brianiacs out there (apple/iTunes): this is how you do it!!!!!!!!!!
YOU DO NOT NEED TO UNINSTALL ALL THE APPLE/QUICKTIME OR RELATED PROGRAMS - JUST DELETE THE APPLE FOLDER IN THE C:\PROGRAM FILES DIRECTORY.
Nuff said.

Using PCSCJCTerminal to find the readers

Hi,
there is a very strange thing that has happenned.
I am trying to develop an off-card application, that uses the jpcsc.dll (not the jct.dll)
to make it application portable accross the platforms. Thus, i have to use PCSCJCTerminal class, that works using jpcsc.dll and jpcsc.jar. Th eproblem is, that when i am trying to get all the readers attached to the machine, i can't:
listReaders() method seems to always return 0, despite the real number of readers attached.
This method works fine in e.g. NativeJCTerminal, bit then jct.dll is needed - i want to avoid using of it.
Could you tell me, where the error may have happened?
Code looks like this:
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t.init(" any|ed");
t.open();
t.listReaders(); //there zero is returnedI would appreciate any comments.
Best regards,
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Your problem statement seems a little odd. If the robot can only go "down" or "left", then every sequence of moves will get him to (1,1) and all the sequences will have exactly the same length.
Also, I think perhaps you don't quite understand recursion. Even though a function is recursive, if-then-else still works the same way - only one of the branches will be taken, not both.
So for instance with the second version of the code that you posted, the initial call CountPaths(6,3) will result in just one recursive call to CountPaths(5,2). This in turn will result in a call to CountPaths(4,1). At that point, the calls will start falling into the earlier branch of the code and you will get calls to CountPaths(3,1), CountPaths(2,1), CountPaths(1,1). So then you will have a stack of six calls, each (except the last) waiting for the recursive call it made to return. CountPaths(1,1) returns without making a recursive call, and each of the others returns immediately (in reverse order) without making any other recursive calls.
On the other hand, if you really want the code to explore all the possible paths, it should recurse to explore the paths that begin with a "down" move and recurse again to explore the paths that begin with a "left" move. Something more like
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Edited by: EricDittert on Sep 11, 2009 6:19 PM

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Hello,
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'''about:config'''
# In the address bar, type "about:config" (with no quotes), and press Enter.
# Click "I'll be careful, I promise"
# In the search bar, search for "javascript.enabled" (with no quotes).
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To Re-enable JavaScript, repeat these steps.
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#ifndef _MPUSBAPI_H_
#define _MPUSBAPI_H_
#define    MPUSB_FAIL                  0
#define MPUSB_SUCCESS               1
#define MP_WRITE                    0
#define MP_READ                     1
// MAX_NUM_MPUSB_DEV is an abstract limitation.
// It is very unlikely that a computer system will have more
// then 127 USB devices attached to it. (single or multiple USB hosts)
#define MAX_NUM_MPUSB_DEV           127
extern "C" __declspec(dllexport)
DWORD MPUSBGetDLLVersion(void);
extern "C" __declspec(dllexport)
DWORD MPUSBGetDeviceCount(PCHAR pVID_PID);
extern "C" __declspec(dllexport)
HANDLE MPUSBOpen(DWORD instance,    // Input
                 PCHAR pVID_PID,    // Input
                 PCHAR pEP,         // Input
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                 DWORD dwReserved); // Input <Future Use>
extern "C" __declspec(dllexport)
DWORD MPUSBRead(HANDLE handle,              // Input
                PVOID pData,                // Output
                DWORD dwLen,                // Input
                PDWORD pLength,             // Output
                DWORD dwMilliseconds);      // Input
extern "C" __declspec(dllexport)
DWORD MPUSBWrite(HANDLE handle,             // Input
                 PVOID pData,               // Input
                 DWORD dwLen,               // Input
                 PDWORD pLength,            // Output
                 DWORD dwMilliseconds);     // Input
extern "C" __declspec(dllexport)
DWORD MPUSBReadInt(HANDLE handle,           // Input
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                   DWORD dwLen,             // Input
                   PDWORD pLength,          // Output
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extern "C" __declspec(dllexport)
BOOL MPUSBClose(HANDLE handle);
#endif

Attached is the DLL's .cpp code. From the .cpp code: "// dwLen   - Specifies the number of bytes to write to the pipe."
Attachments:
_mpusbapi.cpp ‏32 KB

How can I use the CFDAQ6004.dll in a embedded c++-application?

Hi,
I´m working on a reaserch project and I´m trying to write a embedded c++-aplication which reads from values the Compactflash Card CFDAQ6004 of NI. Can I use the cfdaq6004.dll to read from? If yes, how to?
I hope anyone has a solution for me
Best regards, Homi!

Hi there,
I know this post is very old but i guess many guys visit it when reading the topic or by googling about CFDAQ6004 driver. Unfortunately CFDAQ6004.dll is very low level driver that support several functions dealing directly with CF6004 card such as ATTset and ATTget... etc. as one can view in any PE explorer for Windows CE. After a month of testing and analysis, i have successfully write a dll based on CFDAQ6004.dll to open, configure, read, write analog/digital data from/to CF6004 card. The new library was given a name CF6004LIB.dll the following is comparison between my dll and daqmxbase driver:
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inc. eVC++ , VC++ .net, VC# .net, VB .net
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4. Support full error detection                                                           Some errors can not be catched
5. Full sampling rate can be achieved 200 kS/sec                               system dependent (max. 130 kS/sec in hp ipaq 211 PDA)
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7. small in size < 10 kB    Minimum program size 600 kB
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Bye
Jaf

Using PCI-6503 on Win NT 4.0, with NIDAQ 6.8 or 6.9, in a C++ program I found the following DLL Initialization error..

"Initialization of the DLL C:\WINNT\System32\NIPALU.dll failed. The process is terminating abnormally"
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"DLL Initialization failed
Initialization of the dynamic link library C:\WINNT\System32\NIPALU.dll failed. The process is terminating abnormally."
The PCI-6503 tests OK using either NI-DAQ 6.8.1 or 6.9 and I can read write to the DIO lines using the MAX2.0's test panel. Also my program works fine if before compiling the code I open the test panel for PCI-6503 in MAX2.0, so I suspect there is some initialization Im missing in my program. Can someone educate me more on this. Thanks.

Are you using ComponentWorks++ or just the NI-DAQ C interface?

How to access Call Back Functions using *.dll in the Labview?

Hai,
I am Pavan Ram Kumar Somu.
I am new to Labview, currently I am working on MVB Interface.
I need to access the API functions from *.dll file in Labview, as of now , I am doing this with Call function Library node in Labview but it does not support the following data types like
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    2. function pointers Arguments
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Please Answer the below queries also:
1. How to pass pointer arguments to API functions in DLL and how to collect pointer
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2. How to pass structure arguments to API functions in DLL and how to collect structure
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3. How to use callback functions(nothing but function pointers) in Labview and how to
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I need your help while passing these datatypes to API functions in DLL from labview.
Suggest me if there is any other alternative for implementing this task.
I am referencing some examples here:
Examples:
I)
Unsigned short int gf_open_device(void *p_device_config, unsigned long int client_life_sign_timeout, unsigned short int *device_error)
void *p_device_config: How to access/pass these arguments in LabView and to which memory location it points in LabView.
II) #include <windows.h>
     #include <process.h>
     HANDLE rcvEvent0, rcvEvent1;
/* Function call*/
CanGetReceiveEvent(handle[0], &rcvEvent0);
Above is a piece of C code, Now I want to use HANDLE datatype which is windows based, how to use these type in the LABVIEW.
With regards
Pavan Ramu Samu

"Somu" <[email protected]> wrote in message news:[email protected]...
Hai,
I am Pavan Ram Kumar Somu.
 
I am new to Labview, currently I am working on MVB Interface.
 
I need to access the API functions from *.dll file in Labview, as of now , I am doing this with Call function Library node in Labview but it does not support the following data types like
    1. Pointer Arguments(To which memory it points in Labview)
    2. function pointers Arguments
    3 .pointers in structures and pointer structures in structures and many other data types.
 
Please Answer the below queries also:
 
1. How to pass pointer arguments to API functions in DLL and how to collect pointer  
    return types from API functions in DLL
 
2. How to pass structure arguments to API functions in DLL and how to collect structure
    return types from API functions in DLL
 
3. How to use callback functions(nothing but function pointers) in Labview and how to
    collect callback fuctions return types from API functions in DLL
 
I need your help while passing these datatypes to API functions in DLL from labview.
 
Suggest me if there is any other alternative for implementing this task.
 
 
I am referencing some examples here:
Examples:
I)
Unsigned short int gf_open_device(void *p_device_config, unsigned long int client_life_sign_timeout, unsigned short int *device_error)
 
void *p_device_config: How to access/pass these arguments in LabView and to which memory location it points in LabView.
 
II) #include <windows.h>
     #include <process.h>
   
     HANDLE rcvEvent0, rcvEvent1;
 
/* Function call*/
CanGetReceiveEvent(handle[0], &rcvEvent0);
 
Above is a piece of C code, Now I want to use HANDLE datatype which is windows based, how to use these type in the LABVIEW.
 
With regardsPavan Ramu Samu
Search the forum (forums.ni.com) for callback, pointer or handle, and you'll find that it is all possible, but not very easy.
e.g.: http://forums.ni.com/ni/board/message?board.id=170&message.id=88974&requireLogin=False
Regards,
Wiebe.

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Hi folks,
I am trying to use the native c++ dll compiled for Win32 platform using PInvoke. The native dll is a simple library which is returns some dummy values of native data types. The dll is working fine with the traditional Windows Forms Applications. But when
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[System.Runtime.InteropServices.DllImport("win32dll.dll", EntryPoint = "Hello")]
private static extern int Hello();
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Here's the official list of InteropServices classes supported by the phone:
http://msdn.microsoft.com/en-us/library/windowsphone/develop/system.runtime.interopservices(v=vs.105).aspx
DllImport isn't one of them.
Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.
NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined
objects and unknown namespaces.

Using a dll in the JNI dll defined

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