Alexander Kocian

Hello

Currently, I stream and proecess audio (for medical purposes) on my PC (i7-4790T with 8 cores) using LABVIEW 2013. To improve performance, the 8 cores could be shared between MS Windows and the real-time operating system RTX by IntervalZero.

Please, how can I tell LABVIEW to use the (deterministic) RTX cores instead of the (stochastic) MS Windows cores, to stream audio?  

thank you. The code is now working perfectly.

Ned, your method works. Only the declaration int I had to change against  __int64.  thank you. Now, I understand how Labview stores clusters.

rolfk, my VisualC compiler says that the syntax MgErr is unknown.Do I need to consider a special library?

Thank you for giving me feedback.  Creating C-File by Call Library Function Node gives

Quote

/* Call Library source file */

#include "extcode.h"

void pointertest(void source[]);

void pointertest(void source[])
{

    /* Insert code here */

}

Therefore Labview also crashed when I change the function prototype from

Quote

void pointertest(LVCluster *source)

to

Quote

void pointertest(double *source)

Once this simple example works, the task will be to bundle a complex combination of data types.

The task is to process a bundle by a DLL embedded in LABVIEW. LABVIEW crashes even if the coded is most simple.

For example, I created an array of double, bundled it and plugged it into the DLL.  The parameters of the DLL are "Adapt to Type". The prototype in Labview is "void  pointertest(void *source);"

The C program:

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include "Header.h"

extern "C" __declspec(dllexport)void pointertest(LVCluster *source);

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}
void pointertest(LVCluster *source) {
    source->dimSize = 2;
    source->arg[0] = 3.1;
    source->arg[1] = 4.2;
}

 The header: Header.h

#pragma pack(push,1)
typedef struct {
    __int64 dimSize;
    double arg[2];
}LVCluster;
#pragma pack(pop)

The LABVIEW VI is attached.  I checked the foren. However, I cannot figure out what I did wrong. Please give me a hint.

Your support is highly appreciated.

pointertest.vi