proc_nice() for Windows

Greetings

Last week I went to spend some time looking at finding a possible
implementation way for proc_nice(). The proc_nice() function is as the
name says, a wrapper around the POSIX nice() function to change a
process priority. On Windows we can perform a similar operation using
the SetProcessPriority() function using one of the *_PRIORITY_CLASS
constants.

I have attached two patches (for trunk), I had two ideas which is the
reason for this;

1) This one implements the functionality directly into proc_nice() to
change the priority:
http://pastie.org/641993

2) This one implements the functionality into a function called
nice(), so other functions inside php and its extensions may use this
functionality on Windows and by doing that proc_nice() is automaticlly
enabled:
http://pastie.org/641995


Comments? I'd like to add this in atleast 6.0.0, but whether Johannes
agrees I think we should consider it for 5.3.2 if possible.

-- 
regrads,

Kalle Sommer Nielsen
[email protected]