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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997-2006
* Oracle Corporation. All rights reserved.
*
* $Id: os_spin.c,v 12.6 2006/08/24 14:46:22 bostic Exp $
*/
#include "db_config.h"
#include "db_int.h"
/*
* __os_spin --
* Return the number of default spins before blocking.
*/
u_int32_t
__os_spin(dbenv)
DB_ENV *dbenv;
{
SYSTEM_INFO SystemInfo;
u_int32_t tas_spins;
/* Get the number of processors */
GetSystemInfo(&SystemInfo);
/*
* Spin 50 times per processor -- we have anecdotal evidence that this
* is a reasonable value.
*/
if (SystemInfo.dwNumberOfProcessors > 1)
tas_spins = 50 * SystemInfo.dwNumberOfProcessors;
else
tas_spins = 1;
return (tas_spins);
}
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