Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
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: Fri, 19 Aug 2016 12:34:55 +0200
Lines: 20
Message-ID: <e1o5muFhoooU3@mid.individual.net>
References: <np68cv$irr$1@dont-email.me> <np6e6g$37h$1@dont-email.me> <np6gql$aqq$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net baFKmkYYy+2IcfCk5pn5ZgPvaQv5miwqp0PfTSGB+AT1ZX8vR6
Cancel-Lock: sha1:djrAgCNmdKPh85LmjtIpEHZRbqA=
User-Agent: Thunderbird 2.0.0.21 (Windows/20090302)
In-Reply-To: <np6gql$aqq$1@dont-email.me>
Xref: csiph.com comp.lang.pascal.delphi.misc:719

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