[fpc-devel] Suggestion: reference counted objects

Mark Morgan Lloyd markMLl.fpc-devel at telemetry.co.uk
Sat Sep 27 13:29:41 CEST 2014

Hans-Peter Diettrich wrote:
> Mark Morgan Lloyd schrieb:
>> Boian Mitov wrote:
>>> I think parallel processing belongs in library implementations.
>> I have reservations, based in part on the fact that other language 
>> implementations are prepared to assume responsibility for 
>> parallelisation, in part on experience with e.g. APL which at the very 
>> least specifies that the user should assume that operations are 
>> parallelised, and in part on the fact that FPC already vectorises on 
>> e.g. SSE2 hardware.
> What do you (both) mean by "parallel processing"?

I'd suggest that http://wiki.lazarus.freepascal.org/OpenMP_support and 
related pages is an adequate answer; alternatively see 
http://www.elementswiki.com/en/Parallel_For_Loops. However the point I'm 
really trying to make is that IMO before anybody seriously considers 
adding any form of parallelisation at the language level they should add 
serialisation (i.e. comparable with a Brinch Hansen monitor etc.).

> Streaming (SSE...) does *vectoring*, i.e. multiple (floating point) 
> operands of the same *array* are processed in parallel. Such cases can 
> be handled by the compiler, no libraries are involved, no threads, no 
> risk of side-effects.

I'm thoroughly aware of the distinction.

Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]

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