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send with MSG_DONTWAIT and setrlimit in Windows

Started by akira32 Jul 29, 2010 at 3:04 AM 2 replies 15.4k views

Original Post

Jul 29, 2010 at 3:04 AM

I have a linux project but I want to change it to be a windows project.
I meet two probelm.

First, the windows'winsock does not have MSG_DONTWAIT. How do I transfer the code as below to windows syntax?

send( socket, buffer, length, MSG_DONTWAIT );

Second, which funcotion in windows map to the setrlimit function of linux?

struct rlimit rt;
rt.rlim_max = rt.rlim_cur = 50;
setrlimit( RLIMIT_NOFILE, &rt );

hplus0603

Jul 29, 2010 at 3:29 AM

First: You don't need the rlimit call. You can open more than 50 files anyway.

Second: The MSG_DONTWAIT option is equivalent to setting the socket in non-blocking mode for the duration of the call only. Thus, you can use ioctlsocket() in WinSock:

u_long iMode=1;ioctlsocket(Socket,FIONBIO,&iMode);

If you always pass MSG_DONTWAIT, it's more efficient to put the socket in nonblocking mode once, and leave it there.

akira32

Jul 29, 2010 at 9:06 AM

Thanks!
Should I replace MSG_DONTWAIT with zero in windows?

send( socket, buffer, length, MSG_DONTWAIT );//linux
send( socket, buffer, length, 0 );//windows

Evil Steve

Jul 29, 2010 at 9:13 AM

Quote:
Original post by akira32
Thanks!
Should I replace MSG_DONTWAIT with zero in windows?

Yes.

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