On Wed, 21 Feb 2001 pit_at_paradise.net.nz wrote:

> I's my first time to use threading with Boralnd C++. So i guess i messed
> up at some where.

This smells like it could be a C vs C++ problem.

> For instance i don't know how to implement write_data function which is
> used for CURLOPT_WRITEFUNCTION.

It should be a C-function. You can't make the callback function be a C++
function, as C++ functions expect an extra (hidden) argument that libcurl
won't pass them.

> At the moment i put is as following
>
> //----------------------------------------------------------------
> extern size_t write_data(void *ptr, size_t size, size_t nmemb, FILE
> *stream);
>
> //----------------------------------------------------------------
> void __fastcall TTransferThread::Execute()
> {
> ...
> curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
> ...
> }

If figure you actually implement write_data somewhere as well. Ok, my guess
would be to simply make it:

extern "C" {
  size_t write_data(void *ptr, size_t size, size_t nmemb,
                    FILE *stream)
  {
    /* do what you want with the data */
  }
}

> I know that i shouldn't put this kind of topic in here but i don't know
> any where else to ask.

Someone that has experienced libcurl programming from C++ could probably
write down a few hints to think about...

-- 
  Daniel Stenberg -- curl project maintainer -- http://curl.haxx.se/
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