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* Copyright (c) 2001-2004 Jakub Jermar
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/** @addtogroup genericproc
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#ifndef KERN_SCHEDULER_H_
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#define KERN_SCHEDULER_H_
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#include <synch/spinlock.h>
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#include <time/clock.h> /* HZ */
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#define NEEDS_RELINK_MAX (HZ)
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/** Scheduler run queue structure. */
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SPINLOCK_DECLARE(lock);
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link_t rq_head; /**< List of ready threads. */
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size_t n; /**< Number of threads in rq_ready. */
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extern void scheduler_init(void);
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extern void scheduler_fpu_lazy_request(void);
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extern void scheduler(void);
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extern void kcpulb(void *arg);
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extern void sched_print_list(void);
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* To be defined by architectures:
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extern void before_task_runs_arch(void);
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extern void before_thread_runs_arch(void);
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extern void after_thread_ran_arch(void);