3.6.6 SDLNet_SocketReady
int SDLNet_SocketReady(sock)
- sock
- The socket to check for activity.
Both UDPsocket and TCPsocket can be used with this function.
Check whether a socket has been marked as active. This function should only be used on a socket in a socket set, and that set has to have had SDLNet_CheckSockets (see section 3.6.5 SDLNet_CheckSockets) called upon it.
Returns: non-zero for activity. zero is returned for no activity.
| | // Wait forever for a connection attempt
//SDLNet_SocketSet set;
//TCPsocket serversock, client;
int numready;
numready=SDLNet_CheckSockets(set, 1000);
if(numready==-1) {
printf("SDLNet_CheckSockets: %s\n", SDLNet_GetError());
//most of the time this is a system error, where perror might help you.
perror("SDLNet_CheckSockets");
}
else if(numready) {
printf("There are %d sockets with activity!\n",numready);
// check all sockets with SDLNet_SocketReady and handle the active ones.
if(SDLNet_SocketReady(serversock)) {
client=SDLNet_TCP_Accept(serversock);
if(client) {
// play with the client.
}
}
}
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To just quickly do network handling with no waiting, we do this.
| | // Check for, and handle UDP data
//SDLNet_SocketSet set;
//UDPsocket udpsock;
//UDPpacket *packet;
int numready, numpkts;
numready=SDLNet_CheckSockets(set, 0);
if(numready==-1) {
printf("SDLNet_CheckSockets: %s\n", SDLNet_GetError());
//most of the time this is a system error, where perror might help you.
perror("SDLNet_CheckSockets");
}
else if(numready) {
printf("There are %d sockets with activity!\n",numready);
// check all sockets with SDLNet_SocketReady and handle the active ones.
if(SDLNet_SocketReady(udpsock)) {
numpkts=SDLNet_UDP_Recv(udpsock,&packet);
if(numpkts) {
// process the packet.
}
}
}
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See Also:
3.6.5 SDLNet_CheckSockets,
3.6.3 SDLNet_AddSocket,
3.6.4 SDLNet_DelSocket,
3.6.1 SDLNet_AllocSocketSet,
4.5 SDLNet_SocketSet,
4.3 UDPsocket,
4.2 TCPsocket
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