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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @addtogroup Scheduler
* @{
*/
#ifndef _SCHEDULER_H_
#define _SCHEDULER_H_
/** Normal @p chSchReadyI() message. */
#define RDY_OK 0
/** Returned when the thread was made ready because of a timeout. */
#define RDY_TIMEOUT -1
/** Returned when the thread was made ready because of a reset. */
#define RDY_RESET -2
/** Pseudo priority used by the ready list header, do not use.*/
#define NOPRIO 0
/** Idle thread priority.*/
#define IDLEPRIO 1
/** Lowest user priority.*/
#define LOWPRIO 2
/** Normal user priority.*/
#define NORMALPRIO 64
/** Highest user priority.*/
#define HIGHPRIO 127
/** Greatest possible priority.*/
#define ABSPRIO 255
/** Infinite time specification for all the syscalls with a timeout
specification.*/
#define TIME_INFINITE 0
/** The priority of the first thread on the given ready list. */
#define firstprio(rlp) ((rlp)->p_next->p_prio)
/**
* Ready list header.
* @extends ThreadsQueue
*/
typedef struct {
/** Next @p Thread in the ready list.*/
Thread *p_next;
/** Previous @p Thread in the ready list.*/
Thread *p_prev;
/* End of the fields shared with the ThreadsQueue structure. */
/** The thread priority.*/
tprio_t r_prio;
/* End of the fields shared with the Thread structure. */
#ifdef CH_USE_ROUNDROBIN
cnt_t r_preempt;
#endif
#ifndef CH_CURRP_REGISTER_CACHE
/** the currently running thread */
Thread *r_current;
#endif
} ReadyList;
extern ReadyList rlist;
/*
* Scheduler APIs.
*/
#ifdef __cplusplus
extern "C" {
#endif
void chSchInit(void);
Thread *chSchReadyI(Thread *tp);
void chSchGoSleepS(tstate_t newstate);
msg_t chSchGoSleepTimeoutS(tstate_t newstate, systime_t time);
void chSchWakeupS(Thread *tp, msg_t msg);
void chSchDoRescheduleI(void);
void chSchRescheduleS(void);
bool_t chSchRescRequiredI(void);
#ifdef __cplusplus
}
#endif
#ifdef CH_CURRP_REGISTER_CACHE
register Thread *currp asm(CH_CURRP_REGISTER_CACHE);
#else
#define currp rlist.r_current
#endif
#endif /* _SCHEDULER_H_ */
/** @} */
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