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Use MSG_DONTWAIT when available

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This commit is contained in:
Kp 2015-02-05 03:03:48 +00:00
parent ae0a00a893
commit 3045f0fbe0
1 changed files with 12 additions and 8 deletions
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20
similar/main/net_udp.cpp
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@ -574,6 +574,7 @@ static int udp_open_socket(RAIIsocket &sock, int port)
return 0;
}
#ifndef MSG_DONTWAIT
static int udp_general_packet_ready(RAIIsocket &sock)
{
fd_set set;
@ -587,27 +588,30 @@ static int udp_general_packet_ready(RAIIsocket &sock)
else
return 0;
}
#endif
// Gets some text. Returns 0 if nothing on there.
static int udp_receive_packet(RAIIsocket &sock, ubyte *text, int len, struct _sockaddr *sender_addr)
{
ssize_t msglen = 0;
if (!sock)
return -1;
if (udp_general_packet_ready(sock))
{
#ifndef MSG_DONTWAIT
if (!udp_general_packet_ready(sock))
return 0;
#endif
ssize_t msglen;
socklen_t clen;
msglen = dxx_recvfrom(*sender_addr, clen, sock, text, len, 0);
int flags = 0;
#ifdef MSG_DONTWAIT
flags |= MSG_DONTWAIT;
#endif
msglen = dxx_recvfrom(*sender_addr, clen, sock, text, len, flags);
if (msglen < 0)
return 0;
if ((msglen >= 0) && (msglen < len))
text[msglen] = 0;
}
return msglen;
}
/* General UDP functions - END */