Hi Wilfried, Thank you, now I understand. One question again: I call PostThreadMessageA or PostMessage in the OnDataAvailable
Is it a problem? Regards Ing. Alessandro Miorelli Software Engineer Microgate S.r.l. Via Stradivari 4 39100 Bolzano (BZ) Italy www.microgate.it Tel. +390471501532 -----Original Message----- From: TWSocket [mailto:twsocket-boun...@lists.elists.org] On Behalf Of Wilfried Mestdagh Sent: Wednesday, January 10, 2018 8:05 AM To: twsoc...@elists.org Subject: Re: [twsocket] ICS OnDataAvailable Hi Alessandro, Just receive with FWSocket.Receive(...) in your char array. If there is really no data then nothing will be copied into your buffer and the result will be <= 0. Then just exit the event (don't loop). When there is again data then OnDataAvailable will be called again. Rgds Met vriendelijke groeten, Wilfried Mestdagh Op 09-01-18 om 19:53 schreef Alessandro Miorelli: > Thank you so much Wilfred for your quick answer. > > One question: > > I do that > > int length = FWSocket->RcvdCount; > > if(length == 0) > return; > > char *str = new char[length + 1]; > > FWSocket->Receive(str, length); > > str[length] = 0; > > you wrote that sometimes FWSocket->RcvdCount is 0. > > What should I do to receive data? > > I prefer to read char array because I have chars with value < 0x20 > > Thank you > Regards > Ing. Alessandro Miorelli > > Software Engineer > Microgate S.r.l. > Via Stradivari 4 > 39100 Bolzano (BZ) Italy > www.microgate.it > Tel. +390471501532 > > -----Original Message----- > From: TWSocket [mailto:twsocket-boun...@lists.elists.org] On Behalf Of > Wilfried Mestdagh > Sent: Tuesday, January 9, 2018 6:07 PM > To: twsoc...@elists.org > Subject: Re: [twsocket] ICS OnDataAvailable > > I see a second problem in your code: > > } while (length != totalDataReceived && FWSocket->State == > wsConnected && !Terminated && timeout < MAX_TIMEOUT); > > Dont loop in DataAvailable. Just receive the part of data that is > received and exit. When next chunck of data come in the > OnDataAvailable will be fired again. TCP protocol does not respect data boundaries. > > Met vriendelijke groeten, > Wilfried Mestdagh > > Op 09-01-18 om 18:01 schreef Wilfried Mestdagh: >> Hi, >> >> The problem could be in this peace of code: >> >> int length = FWSocket->RcvdCount; >> >> if(length == 0) >> { >> Debug::DebugString(AnsiString("FWSocketDataAvailable length >> ") >> + IntToStr(length)); >> return; >> } >> >> RcvdCount is not reliable. This is not a TWSocket problem but a >> Windows problem. Even if it returns zero the you should try to >> receive data. So just leave that part out of it. >> >> Rgds, Wilfried >> >> Met vriendelijke groeten, >> Wilfried Mestdagh >> >> Op 09-01-18 om 15:48 schreef Alessandro Miorelli: >>> Hi, >>> >>> I'm working with ICS and BCB6 >>> >>> All works fine but sometimes I don't receive OnDataAvailable event >>> anymore. >>> >>> In attach the code. >>> >>> Please could you help me >>> >>> >>> Regards >>> >>> >>> Ing. Alessandro Miorelli >>> >>> >>> Software Engineer >>> >>> >>> >>> > -- > To unsubscribe or change your settings for TWSocket mailing list > please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > Visit our website at http://www.overbyte.be > -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
