[Vm-dev] Why StandardFileStream fileID is 16 bytes in Linux while 20 bytes in OSX?

[Mariano Martinez Peck]

On Sat, Jan 9, 2016 at 12:45 PM, Eliot Miranda <eliot.miranda at gmail.com>
wrote:

>
> My guess is that the VM is being built, wrongly, without 64-bit file
> sizes.  In the Squeak VM this is definitely not 16 bytes.
>
>
Hi Eliot,

Thank you very much!! You nailed it :)  It is indeed that the fileSize in
Linux VM is 4 bytes and not 8 as for OSX.

You said that in the SqueakVM it is 64 bits. By SqueakVM you mean your Cog
(and not our Pharo builds) or you mean the old interpreter VM?

Should I open an issue somewhere so that we can make it 64 bits file size?

Thanks advance,


_,,,^..^,,,_ (phone)
>
> On Jan 9, 2016, at 7:06 AM, Mariano Martinez Peck <marianopeck at gmail.com>
> wrote:
>
> Hi guys,
>
> In OSX, StandardFileStream byteID size is 20, while in Linux, it is 16. I
> see this definition in  ./Cross/plugins/FilePlugin/FilePlugin.h
>
>
> /* squeak file record; see sqFilePrims.c for details */
> typedef struct {
>   int                    sessionID;     /* ikp: must be first */
>   void                  *file;
>   squeakFileOffsetType   fileSize;      /* 64-bits we hope. */
> #if defined(ACORN)
> // ACORN has to have 'lastOp' as at least a 32 bit field in order to work
>   int lastOp; // actually used to save file position
>   char writable;
>   char lastChar;
>   char isStdioStream;
> #else
>   char                   writable;
>   char                   lastOp; /* 0 = uncommitted, 1 = read, 2 = write */
>   char                   lastChar;
>   char                   isStdioStream;
> #endif
> } SQFile;
>
> And I see no override from UNIX platform code. So...how can that be 16
> bytes in Linux?
>
> Thanks in advance,
>
>
>
> --
> Mariano
> http://marianopeck.wordpress.com
>
>
>


-- 
Mariano
http://marianopeck.wordpress.com
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