switch_to.h

 1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Copyright (C) 2001 - 2005 Tensilica Inc.
 7 */
 8
 9#ifndef _XTENSA_SWITCH_TO_H
10#define _XTENSA_SWITCH_TO_H
11
12/* * switch_to(n) should switch tasks to task nr n, first
13 * checking that n isn't the current task, in which case it does nothing.
14 */
15extern void *_switch_to(void *last, void *next);
16
17#define switch_to(prev,next,last)		\
18do {						\
19	(last) = _switch_to(prev, next);	\
20} while(0)
21
22#endif /* _XTENSA_SWITCH_TO_H */