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Re: WWWLib 3.1 & blocking I/O

From: Christian Promitzer <cprom@iicm.tu-graz.ac.at>
Date: Tue, 17 Oct 1995 10:56:38 +0100
Message-Id: <199510170956.AA13695@iicm.tu-graz.ac.at>
To: Multiple recipients of list <www-lib@www10.w3.org>, "Keith Kiyohara" <KKiyohara@symantec.com>, Multiple recipients of list <www-lib@www10.w3.org>, frystyk@w3.org (Henrik Frystyk Nielsen), Multiple recipients of list <www-lib@www10.w3.org>, frystyk@w3.org (Henrik Frystyk Nielsen), www-lib@www10.w3.org, www-lib@www10.w3.org, cwensel@rtis.com (Chris Wensel), www-talk@w3.org, www-lib@w3.org, Henrik Frystyk Nielsen <frystyk@w3.org>, www-talk@w3.org, www-lib@w3.org, Henrik Frystyk Nielsen <frystyk@w3.org>, www-lib@w3.org, mitch@tam.net (Mitch DeShields), mitch@tam.net, msfriedm@us.oracle.com (Mark S. Friedman), www-lib@w3.org, msfriedm@us.oracle.com, Henrik Frystyk Nielsen <frystyk@w3.org>, mitch@tam.net, www-lib@w3.org, www-lib@w3.org, mitch@tam.net (Mitch DeShields), mitch@tam.net (Mitch DeShields), Henrik Frystyk Nielsen <frystyk@w3.org>, www-lib@w3.org, "'www-lib@w3.org'" <www-lib@w3.org>, Teo Kok Hoon <kokhoon@iti.gov.sg>, www-lib@w3.org, Henrik Frystyk Nielsen <frystyk@w3.org>, Maciej Puzio <puzio@laser.mimuw.edu.pl>, Henrik Frystyk Nielsen <frystyk@w3.org>, "'WWW Library Mailing List'" <www-lib@w3.org>
>>From www-lib-request@w3.org Thu Sep 21 15:37:37 1995
>Resent-Date: Thu, 21 Sep 1995 09:36:32 -0400
>Resent-Message-Id: <199509211336.JAA09903@www19.w3.org>
>To: msfriedm@us.oracle.com
>Cc: mitch@tam.net, www-lib@w3.org
>Reply-To: Henrik Frystyk Nielsen <frystyk@w3.org>
>Subject: Re: WWWLib 3.1 & blocking I/O 
>Date: Thu, 21 Sep 1995 09:32:04 -0400
>From: Henrik Frystyk Nielsen <frystyk@w3.org>
>Content-Length: 1242
>Resent-From: www-lib@w3.org
>X-Mailing-List: <www-lib@w3.org> archive/latest/224
>X-Loop: www-lib@w3.org
>Sender: www-lib-request@w3.org
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>
>> Mitch DeShields writes:
>>  > 
>>  > I'm using the WWWLib 3.1 in a Windows environment.  I'd like to use the
>>  > asynchronous winsock.  ...
>>  > 
>>  > I find that the call to connect() in HTDoConnect() returns WSAWOULDBLOCK.
>>  > 
>>  > Does my message handler need to do anything (line call LoadHTTP() again to
>>  > get back into the state machine)?
>> 
>> Assuming that WWWLib 3.1 work the same way as 3.0, you just need to
>> re-call whatever lib call you originally made (i.e. LoadHTTP) that
>> returned WSAWOULDBLOCK. 
>
>Version 3.1 does work the same way - it's basically based on call back 
>functions. What might be a bit confusing is that 3.1 is a mix between the 
>original version of call back functions and the one provided by Charlie Brooks 
>for extending it to work on NT. I have now cleaned this up and it will get out 
>in the next version so it hopefully is a lot easier to find out.
> 
>> The way the non-blocking IO mechanism works is for the load functions
>> to return either when they complete their operation, when they would
>> block waiting for input or when they get an error.
>
>Yep :-)
>
>
>-- 
>
>Henrik Frystyk Nielsen, <frystyk@w3.org>
>World-Wide Web Consortium, MIT/LCS NE43-356
>545 Technology Square, Cambridge MA 02139, USA
>
>
>
>
>
>
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Christian Promitzer                                 cprom@iicm.tu-graz.ac.at
Institute for Information Processing and Computer Supported New Media (IICM)
                   Graz University of Technology, Austria
Voice: ++43/316/873-5644                                Fax: ++43/316/824394
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Received on Tuesday, 17 October 1995 05:58:43 GMT

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