Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue

From	Hans-Peter Diettrich <DrDiettrich1@aol.com>
Newsgroups	comp.lang.pascal.delphi.misc
Subject	Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue
Date	2016-08-19 12:34 +0200
Message-ID	<e1o5muFhoooU3@mid.individual.net> (permalink)
References	<np68cv$irr$1@dont-email.me> <np6e6g$37h$1@dont-email.me> <np6gql$aqq$1@dont-email.me>

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P E Schoen schrieb:

> In the previous procedure for SerialNG, I did this:
> 
> var
>    RecdPtr: PChar;
> begin
>    RecdPtr := CommSerialPort.ReadNextCluster( NCSize, RdErrors );
>    ...
>    FreeMem( RecdPtr, NCSize );         // Added 4/8/09
> end;
> ========================================================
> 
> I don't know if that was a problem or not. It seems that I might need to 
> reserve memory for the PChar before using it?

Various implementations of ReadNextCluster are possible. It may be 
required or forbidden to free the memory of the returned pointer.

DoDi

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Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-19 02:19 -0400
  Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-19 03:58 -0400
    Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-19 04:42 -0400
      Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2016-08-19 12:34 +0200
    Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2016-08-19 12:30 +0200
      Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-19 20:54 -0400
        Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2016-08-20 12:43 +0200
          Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-20 19:15 -0400
            Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2016-08-21 12:50 +0200
              Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue "P E Schoen" <paul@pstech-inc.com> - 2016-08-22 07:12 -0400
  Re: Delphi D4: using pointers to transfer data from COMM queue to circular queue Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2016-08-19 12:27 +0200

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