isusemt.c

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	isusemt.c (libtkse)
 */

#include <basic.h>
#include <tk/typedef.h>
#include <sys/libs.h>


/*
 * When symbol value (address) of _usemt_ (defined in crtbt) is
 *	0: single-task
 *	other than 0: multi-task
 */


/**** The following specifications are invalid ****/
/*
 * When symbol value (address) of _usemt_ is
 *	0: single-task
 *	other than 0: multi-task
 *
 *	libsvc defines default setting of _usemt_ in its usemt.S,
 *	and by default, it is set to single-task.
 *	However, libtk has own setting of _usemt_ so that it is set to
 *	multi-task by default.
 *
 *	If sdata is used, declare them as an array so that they
 *	are not treated as variables within sdata.
 */
IMPORT	char	_usemt_[];

/*
 * When used for multi-task: TRUE
 */
EXPORT BOOL _isUseMT( void )
{
	return ( &_usemt_ != 0 );
}