linuxaudio.org

On Fri, Oct 17, 2008 at 08:36:56PM +0200, Olivier Guilyardi wrote:
> I don't see why it's fragile. There's no reason for the compiler to modify

quoted text
> rb->read_ptr if not asked to. Buf if that's the case, because of some sort of

> dark voodoo optimization, then we could use a temporary variable to hold the

> intermediary result. Better, all computation could be done on this temporary

> variable and transfered into rb->read_ptr once finished, so that modifying the

> later only involves memory copy.

There is no reason indeed, and only a completely braindead

compiler would do it unless forced to, but it is not formally

excluded unless you make read_ptr volatile. Using a temporary

variable doesn't change the picture at all.
Ciao,
--

FA
Laboratorio di Acustica ed Elettroacustica

Parma, Italia
Lascia la spina, cogli la rosa.
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