1/*-
2 * See the file LICENSE for redistribution information.
3 *
4 * Copyright (c) 1997,2008 Oracle.  All rights reserved.
5 *
6 * $Id: os_yield.c,v 12.13 2008/01/08 20:58:46 bostic Exp $
7 */
8
9#include "db_config.h"
10
11#include "db_int.h"
12
13/*
14 * __os_yield --
15 *	Yield the processor, optionally pausing until running again.
16 */
17void
18__os_yield(env, secs, usecs)
19	ENV *env;
20	u_long secs, usecs;		/* Seconds and microseconds. */
21{
22	COMPQUIET(env, NULL);
23
24	/* Don't require the values be normalized. */
25	for (; usecs >= US_PER_SEC; usecs -= US_PER_SEC)
26		++secs;
27
28	/*
29	 * Yield the processor so other processes or threads can run.
30	 *
31	 * Sheer raving paranoia -- don't sleep for 0 time, in case some
32	 * implementation doesn't yield the processor in that case.
33	 */
34	Sleep(secs * MS_PER_SEC + (usecs / US_PER_MS) + 1);
35}
36