[Patch] nanosleep()

["Pierre A. Humblet" <pierre at phumblet dot no-ip dot org>]

This patch to nanosleep, sleep and usleep 
a) makes them Posix conformant: the system clock (gettimeofday) must 
   advance by at least d during Xsleep(d) 
  (e.g. exim relies on this to create unique ids).
b) improves the resolution of the result by using the multimedia 
   timer. 
c) calls timeBeginPeriod in forked processes.

A follow up patch will improve setitimer. 

Pierre

2003-09-03  Pierre Humblet <pierre.humblet@ieee.org>

	* hires.h (_DELAY_MAX): Define.
	(hires_ms::minperiod): Declare static.
	(hires_ms::resolution): New.
	(hires_ms::dmsecs): New.
	(hires_ms::~hires_ms): Delete.
 	(gtod): Declare. 
	* time.c (hires_ms::prime): Always calculate minperiod and 
	set it to 1 in case of failure.
	(hires_ms::resolution): Define.
	(hires_ms::~hires_ms): Delete.
	(hires_ms::usecs): Check minperiod to prime.
	(gtod) Define.
	* signal.cc (nanosleep): Round delay up to resolution.
	Fix test for negative remainder. Use timeGetTime through gtod.
	(sleep): Round up return value.

Attachment: sleep.diff
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