Question

I have

    client_sock = accept(server_sock, (struct sockaddr *)&client_name, &client_name_len);        
    if (pthread_create(&newthread , NULL, (void * ) accept_request, client_sock) != 0) {
            perror("pthread_create");
    }

That’s just part of the entire script. Every time I try to compile it, I get warning: passing argument 4 of 'pthread_create' makes pointer from integer without a cast

Any idea why this is happening? Thanks in advance.

Answer 1

Argument 4 is client_sock, which is the argument that gets passed to accept_request. It is expected to be a pointer, but since it’s just passed through to your function, it can be an integer without doing any harm. Just cast it to void* to remove the warning.

On the other hand, the third argument accept_request should be a function pointer accepting void* and returning void*. You shouldn’t have to cast it to void*. It would be best to change the declaration of accept_request to match the specification.

void *accept_request( void *client_sock );