2013/5/5 Ludo Brands <ludo.bra...@free.fr> > On 05/04/2013 09:59 PM, Zaher Dirkey wrote: > > > now in this example > > > http://msdn.microsoft.com/en-us/library/windows/desktop/ms737526%28v=vs.85%29.aspx > > They not use Select before accept > > > > If you are happy with accept blocking or if you use non-blocking sockets > you don't need select before accept. > > > and in > > > http://msdn.microsoft.com/en-us/library/windows/desktop/ms740141%28v=vs.85%29.aspx > > > >>The parameter /readfds/ identifies the sockets that are to be checked > > for readability. If the socket is currently in the *listen* > > < > http://msdn.microsoft.com/en-us/library/windows/desktop/ms739168%28v=vs.85%29.aspx > > > > state, it will be marked as readable if >an incoming connection request > > has been received such that an *accept* > > < > http://msdn.microsoft.com/en-us/library/windows/desktop/ms737526%28v=vs.85%29.aspx > > > > is guaranteed to complete *without blocking*. > > > > That is exactly the purpose of select. The timeout guarantees that your > program stays alive and can do something else. > > > I still not sure in windows need Select, but maybe in Linux only, but i > > can't test it there. > > > > I repeat, you don't have to use select in Windows or Linux. If you > prefer blocking sockets you don't need select but accept/recv/send will > block. If you use non-blocking sockets you need to deal with EAGAIN or > EWOULDBLOCK (WSAEWOULDBLOCK on windows). There are also alternatives to > select: poll, epoll, libevent, etc., etc. on linux, WSAPoll on windows > Vista and later. For completeness, on windows you have also the > asynchronous overlapped IO mode which is used a lot in high performance > servers but rather complex to program. > > Ludo
Ludo, I'm almost by completing the units in this link: https://bitbucket.org/silvioprog/tcpipcomp (this repository is temporary) The current code (I'm updating it daily) in these units is good? I'm open to suggestions, and we can change whatever it takes. I want to send these units to the Free Pascal team and a package to the Lazarus team. Sorry for my English please. -- Silvio Clécio My public projects - github.com/silvioprog
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