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 1.11 2008/01/08 20:58:44 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#ifdef HAVE_BREW_SDK2
25	COMPQUIET(secs, 0);
26	COMPQUIET(usecs, 0);
27#else
28	/* Don't require the values be normalized. */
29	for (; usecs >= US_PER_SEC; usecs -= US_PER_SEC)
30		++secs;
31
32	/*
33	 * Yield the processor so other processes or threads can run.
34	 *
35	 * Sheer raving paranoia -- don't sleep for 0 time, in case some
36	 * implementation doesn't yield the processor in that case.
37	 */
38	MSLEEP(secs * MS_PER_SEC + (usecs / US_PER_MS) + 1);
39#endif
40}
41