/dev/random cleanup [sommerfeld%netbsd.org@localhost: CVS commit: syssrc]

[Simon Burge <simonb%netbsd.org@localhost>]

Bill Sommerfeld wrote:

> Module Name:  syssrc
> Committed By: sommerfeld
> Date:         Mon Jun  5 23:42:35 UTC 2000
> 
> Modified Files:
> 
>       syssrc/sys/dev: rnd.c rndpool.c
>       syssrc/sys/sys: rnd.h
> 
> Log Message:
> 
> /dev/random code cleanups:
> [ ... ]
>  - allow MD code to supply cpu_timestamp() and cpu_havetimestamp() for
> an optional higher-resolution clock/roulette wheel source.

One questions - would be be better to store the results of the test

+#ifdef __HAVE_CPU_TIMESTAMP
+       if (cpu_hastimestamp())
+               return cpu_timestamp();
+#endif

in a static variable?  I notice that the test is both inline and
inexpensive on the i386 example, but this may not be on other platforms.
Hmm, or maybe make cpu_hastimestamp() a stub call on platforms where
this test would be expensive and leave this fragment as is...

Simon.