c and shared libs ?? how to do it right?

[crusty_collins]

Hey, I am a newbie to all of this so please don't flame me for a stupid question. I am trying to write a shared lib that will initialize a connection to a messaging deamon. Then the library will be called at intervals and send data. My problem is that I am having issues with passing a datatype to a lib. I would think that the following would work.

void
initRv( tibrvTransport *transport)
{
        char*               serviceStr = "7500";
    char*               networkStr = "";
    char*               daemonStr  = "tcp:7500";

    status = tibrvTransport_Create(*transport, serviceStr, networkStr, daemonStr);
return;
}

Give me a warning: passing arg 1 of tibrvTransport_Create makes pointer from integer without a cast

I think I have the pointers screwed up.??

[jim mcnamara]

try

status = tibrvTransport_Create(transport, serviceStr, networkStr, daemonStr);

transport is already a pointer, so using *transport says to pass that value of the object pointed to, not the address. Pointers are addresses.

It also seems you are not prototyping functions. Or maybe not including header files.

There should be separate prototypes for each of the functions so that compiler won't issue a warning, instead it will issue a fatal error if the datatype of an argument is wrong.

I made up this prototype:
void tibrvTransport_Create(tibrvTransport *, char *, char *, char *);

It's possible *transport was actually correct, but the compiler does not seem to know.

[crusty_collins]

Wonderful, you confirmed what I was working on. Thanks for the help. It works!