BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TIdUDPServer questions          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message csaaa Guest Posted: Sat Sep 16, 2006 7:48 pm    Post subject: TIdUDPServer questions I construct an UDP Server-side program with TIdUDPServer. I filled my code of processing UDP datagrams in the OnUDPRead Event of TIdUDPServer. But I found that the program processes UDP datagrams one by one. I want multi-threads to process UDP datagrams simultaneously. Reading the Indy9 help document, I found TIdUDPListenerThread class. I can't find more information about TIdUDPListenerThread class. I don't know whether TIdUDPListenerThread class can help me construct multi-thread processing. I was afflicted by the problem serval weeks. Who can show me a demo or give me some hints. Any help will be appreciated. csaaa Back to top Martin James Guest Posted: Sun Sep 17, 2006 8:11 am    Post subject: Re: TIdUDPServer questions csaaa wrote: Quote: I construct an UDP Server-side program with TIdUDPServer. I filled my code of processing UDP datagrams in the OnUDPRead Event of TIdUDPServer. But I found that the program processes UDP datagrams one by one. I want multi-threads to process UDP datagrams simultaneously. Reading the Indy9 help document, I found TIdUDPListenerThread class. I can't find more information about TIdUDPListenerThread class. I don't know whether TIdUDPListenerThread class can help me construct multi-thread processing. I was afflicted by the problem serval weeks. Who can show me a demo or give me some hints. Any help will be appreciated. Well, would it not be easiest to take the datagram in the OnUDPRead event and queue it off to a pool of lower-priority 'datagram-processing' threads? Looking briefly at the Indy 9 I have loaded at the moment, it appears that the incoming datagrams are loaded into an internal, protected TmemoryStream instance. To queue off the datagrams using TIdUDPServer 'as-is' would seem to imply copying the data, (again), into some intermediate 'Tdatagram' object. I'm guessing, (though Remy is the real expert here), that a descendant of TIdUDPServer could add a 'createNewDatagramStream' method that would create a new instance of the TmemoryStream for the next datagram and so allow the 'AData' stream instance received in 'OnUDPRead' to be detached from the TIdUDPServer and so be queued off without copying. Indy could have made this easier by passing the AData as a var parameter so that an OnUDPRead handler could easily signal that it wanted to 'keep' the stream by setting the parameter to nil after queueing it off, so prompting the OnUDPRead caller to create a new stream without any extra 'use a new stream for the next datagram' methods. Rgds, Martin Back to top Remy Lebeau (TeamB) Guest Posted: Mon Sep 18, 2006 9:32 pm    Post subject: Re: TIdUDPServer questions "csaaa" <csaaa (AT) 21cn (DOT) com> wrote in message news:450c0f49 (AT) newsgroups (DOT) borland.com... Quote: I construct an UDP Server-side program with TIdUDPServer. I filled my code of processing UDP datagrams in the OnUDPRead Event of TIdUDPServer. But I found that the program processes UDP datagrams one by one. Why is that a problem? You can't process multiple datagrams at a time on a given IP/Port to begin with. What exactly are you trying to accomplish that you are unable to? Quote: I want multi-threads to process UDP datagrams simultaneously. In what way exactly? Please be more specific. Quote: Reading the Indy9 help document, I found TIdUDPListenerThread class. I can't find more information about TIdUDPListenerThread class. That is because there is no information for it. It is a private class for Indy's internal use. Quote: I don't know whether TIdUDPListenerThread class can help me construct multi-thread processing. You cannot use TIdUDPListenerThread in your own code. Quote: I was afflicted by the problem serval weeks. What is the actual problem? 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