[dmd-concurrency] real

[Steve Schveighoffer]

By that logic, shared arrays must be usable on 32-bit systems and not on 64 bit.  I think this is a huge portability issue, and an unacceptable inconsistency.

Reals are not the same however, there the capabilities of the processor are specifically targeted.

-Steve



----- Original Message ----
> From: Walter Bright <walter at digitalmars.com>
> 
> Enables is I think a better word.
> 
> Portability is not the overriding goal of D. Gratuitous non-portability is a bad 
> idea, but I think a systems language shouldn't be dumbed down to the lowest 
> common denominator. It'd be like crippling 64 bit D so it cannot allocate more 
> memory than 32 bit D could. People paid for their machine, and they should be 
> able to run apps that fully exploit them.
> 
> Also, when compiling for the odd machine that won't support real atomics, you 
> get a compile time error, not subtly wrong results.
> 
> Andrei Alexandrescu wrote:
> > That fosters non-portable code.
> > 
> > Andrei
> > 
> > Walter Bright wrote:
> >> Since D is a systems language, it should work where available and not 
> (compile time error) when not available. Leave it to the programmer to select 
> the most appropriate workaround where it does not work.
> >> 
> >> Andrei Alexandrescu wrote:
> >>> It looks like we're converging on this:
> >>> 
> >>> - shared pointer read/assignment works
> >>> 
> >>> - shared numeric data read/assignment works, EXCEPT for real
> >>> 
> >>> Real is an odd beast - it has no guaranteed width and is mostly 
> system-dependent. Should we guarantee atomic assignment to shared(real), leave 
> it to the platform, or just disallow it entirely?
> >>> 
> >>> 
> >>> Andrei
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