Re: SO_SNDBUF size is small on win32?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: [HACKERS] SO_SNDBUF size is small on win32?
Date: Tue, 27 Jun 2006 12:28:35 -0400

> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> > Martijn van Oosterhout wrote:
> >> On Wed, Jun 28, 2006 at 12:23:13AM +0900, Yoshiyuki Asaba wrote:
> >>> http://support.microsoft.com/kb/823764/EN-US/
>
> > No, it says it occurs if this condition is met: "A single *send* call or
> > *WSASend* call fills the whole underlying socket send buffer."
>
> It also says that the condition only occurs if the program uses
> non-blocking sockets ... which the backend does not. So this page
> offers no support for the proposed patch.

WSAEventSelect() sets a socket to nonblocking mode.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wcecomm5/html/wce50lrfWSAEventSelect.asp

pgwin32_send() calls pgwin32_waitforsinglesocket() before
WSASend(). And pgwin32_waitforsinglesocket() calls WSAEventSelect().

Regards,
--
Yoshiyuki Asaba
y-asaba(at)sraoss(dot)co(dot)jp