[Info-vax] VMS process communication

Arne Vajhøj arne at vajhoej.dk
Tue Mar 21 07:33:58 EDT 2023


On 3/20/2023 5:37 AM, Andreas Gruhl wrote:
> Arne Vajhøj schrieb am Samstag, 18. März 2023 um 01:26:39 UTC+1:
>> On 3/16/2023 5:05 AM, Andreas Gruhl wrote:
>>> Arne Vajhøj schrieb am Donnerstag, 16. März 2023 um 01:47:31 UTC+1:
>>>> On 3/10/2023 4:01 PM, Arne Vajhøj wrote:
>>>>> Pre-release for comments:
>>>>>
>>>>> https://www.vajhoej.dk/arne/articles/vms64.html
>>>>
>>>> Updated to version 1.0 based on comments.
>>> Small correction: PASCAL/USAGE=64BIT_TO_DESCR does NOT change the
>>> compiler's treatment of pointers. Interpreting pointers as unsigned
>>> values has to be provided by the programmer. The qualifier only
>>> allows for P2 structures to be used as actual routine parameters via
>>> descriptor, which otherwise would be flagged as a compile time
>>> error.
>> So it does not change the treatment of pointers.
>>
>> It disables a compiler check.
>>
>> Like allowing this to compile:
>>
>> procedure whatever(...; %STDESCR somearg; ...); external;
>> ...
>> (* z is in lower 2 GB of P2 space *)
>> ...
>> whatever(..., z, ...);
>>
>> ?

> That's correct.

I have updated.

Arne





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