using a DLL that passes back a pointer location to its own internal memory

[Philippe.Rubbers@eskom.co.za]

I have a DLL which I would like to use in LabView

unfortunately, the DLL uses an internal memory buffer, and only passes back a pointer to the buffer.

I found some help on your web site which gets around this by using an undocumented LabView function

with an example: lvPointer.... Library name: LabView, Function Name MoveBlock

void MoveBlock(unsigned long src,long *dst, long size)

I understand that this function internally creates the memory and moves the data to the new location, returing the array.

I now have a huge memory leak, unless I can deallocate this memory (since I am getting data from the DLL into a new array every time, 50 times a second, 16k each time), how can I do this?

[chrisger]

hi there

i'm just guessing: who frees the initial memory (unsigned long src)?  have you tried to call free(unsigned long src) after MoveBlock?

[Philippe.Rubbers@eskom.co.za]

Appologies, I was being stupid.

The BlockMove is passed a buffer in the first place, so I can just reuse it, while the DLL cleans itself up.

Thank for the help

Best regards