Add a socket to a socket set, to be checked for available data.
int SDLNet_AddSocket(SDLNet_SocketSet set, SDLNet_GenericSocket sock);
|the socket set to add a new socket to.
|the socket to add to the set.
Returns the total number of sockets contained in the set (including this new one), or -1 if the set is already full.
Generally you don't want to call this generic function, but rather the specific, inline function that wraps it: SDLNet_TCP_AddSocket() or SDLNet_UDP_AddSocket().
This function will fail if you add a socket to the set when the set already has its maximum number of sockets added, but otherwise it will always succeed.
sock is NULL, nothing is added to the set; this lets you query the number of sockets currently contained in the set.
This function is available since SDL_net 2.0.0.