How does godot's NetSocket creates an instance?

Question

I'm reading the source code of godot , and I can't understand how NetSocket class creates its instance.

In net_socket.cpp , create() is defined, but I can't see how it works.

#include "net_socket.h"

NetSocket *(*NetSocket::_create)() = NULL;

NetSocket *NetSocket::create() {

    if (_create)
        return _create();

    ERR_PRINT("Unable to create network socket, platform not supported");
    return NULL;
}

Especially, what is _create ? And what does NetSocket *(*NetSocket::_create)() = NULL; do actually?

Answer 1

You're looking at the wrong file. That one just delegates to whatever platform-specific implementation has been linked in/instantiated, using a function pointer called _create .

It is set in, for example, the POSIX impl .

Simply search the codebase for instances of _create and you'll see how it works.