981d028c09
* Seal away private thread and kernel definitions and declarations into the internal headers in order to better hide internal structure. * Add a thread-common.c file that keeps shared functions together. List functions aren't messed with since that's about to be changed to different ones. * It is necessary to modify some ARM/PP stuff since GCC was complaining about constant pool distance and I would rather not force dump it. Just bl the cache calls in the startup and exit code and let it use veneers if it must. * Clean up redundant #includes in relevant areas and reorganize them. * Expunge useless and dangerous stuff like remove_thread(). Change-Id: I6e22932fad61a9fac30fd1363c071074ee7ab382
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Ulf Ralberg
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef CORELOCK_H
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#define CORELOCK_H
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#include "config.h"
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#ifndef HAVE_CORELOCK_OBJECT
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/* No atomic corelock op needed or just none defined */
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#define corelock_init(cl) \
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do {} while (0)
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#define corelock_lock(cl) \
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do {} while (0)
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#define corelock_try_lock(cl) \
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do {} while (0)
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#define corelock_unlock(cl) \
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do {} while (0)
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#else
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/* No reliable atomic instruction available - use Peterson's algorithm */
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struct corelock
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{
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volatile unsigned char myl[NUM_CORES];
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volatile unsigned char turn;
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} __attribute__((packed));
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/* Too big to inline everywhere */
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extern void corelock_init(struct corelock *cl);
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extern void corelock_lock(struct corelock *cl);
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extern int corelock_try_lock(struct corelock *cl);
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extern void corelock_unlock(struct corelock *cl);
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#endif /* HAVE_CORELOCK_OBJECT */
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#endif /* CORELOCK_H */
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