1 /*

     2  * nonblocksockets.h

     3  *

     4  *  Created on: 31.05.2012

     5  *      Author: simmax

     6  */

     7 

     8 #ifndef NONBLOCKSOCKETS_H_

     9 #define NONBLOCKSOCKETS_H_

    10 

    11 #include <SDL_net.h>

    12 #include <stdbool.h>

    13 

    14 typedef struct {

    15 	TCPsocket sock;

    16 	SDLNet_SocketSet sockset;

    17 } _NonBlockSocket;

    18 

    19 typedef _NonBlockSocket *NonBlockSocket;

    20 

    21 /**

    22  * Close the indicated socket, free its memory and set it to NULL.

    23  * If the socket is already NULL, nothing happens.

    24  */

    25 void flib_nbsocket_close(NonBlockSocket *socket);

    26 

    27 /**

    28  * Try to accept a connection from a listening socket.

    29  * if localOnly is true, this will only accept connections which came from 127.0.0.1

    30  * Returns NULL if nothing can be accepted.

    31  */

    32 NonBlockSocket flib_nbsocket_accept(TCPsocket listensocket, bool localOnly);

    33 

    34 /**

    35  * Attempt to receive up to maxlen bytes from the socket, but does not

    36  * block if nothing is available.

    37  * Returns the ammount of data received, 0 if there was nothing to receive,

    38  * or a negative number if the connection was closed or an error occurred.

    39  */

    40 int flib_nbsocket_recv(NonBlockSocket sock, void *data, int maxlen);

    41 

    42 /**

    43  * We can't do a nonblocking send over SDL_net, so this function just forwards

    44  * to SDLNet_TCP_Send for convenience, which blocks until all data is sent or an

    45  * error occurs. The ammount of data actually sent is returned, negative value on error.

    46  */

    47 static inline int flib_nbsocket_blocksend(NonBlockSocket sock, void *data, int len) {

    48 	return SDLNet_TCP_Send(sock->sock, data, len);

    49 }

    50 

    51 #endif /* NONBLOCKSOCKETS_H_ */