zephyr/include/microkernel/ticks.h

/* microkernel/ticks.h - microkernel tick header file */

/*
 * Copyright (c) 1997-2015 Wind River Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1) Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2) Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3) Neither the name of Wind River Systems nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef TICKS_H
#define TICKS_H

#include <nanokernel.h>
#include <sys_clock.h>

/* externs */

#ifdef __cplusplus
extern "C" {
#endif

extern void sys_scheduler_time_slice_set(int32_t t, kpriority_t p);

extern uint32_t task_cycle_get_32(void);
extern int32_t task_tick_get_32(void);
extern int64_t task_tick_get(void);
extern ktimer_t task_timer_alloc(void);
extern void task_timer_free(ktimer_t timer);
extern void task_timer_start(ktimer_t timer,
			     int32_t duration,
			     int32_t period,
			     ksem_t sema);
/**
 *
 * @brief Restart a timer
 *
 * This routine restarts the timer specified by <timer>. The timer must have
 * already been started by a call to task_timer_start().
 *
 * @param timer      Timer to restart.
 * @param duration   Initial delay.
 * @param period     Repetition interval.
 *
 * @return N/A
 */

static inline void task_timer_restart(ktimer_t timer, int32_t duration,
										int32_t period)
{
	task_timer_start(timer, duration, period, _USE_CURRENT_SEM);
}

extern void task_timer_stop(ktimer_t timer);
extern int64_t task_tick_delta(int64_t *reftime);
static inline int32_t task_tick_delta_32(int64_t *reftime)
{
	return (int32_t)task_tick_delta(reftime);
}

extern void task_sleep(int32_t ticks);
extern int task_workload_get(void);
extern void sys_workload_time_slice_set(int32_t t);

#define isr_cycle_get_32() task_cycle_get_32()
#define isr_tick_get_32() task_tick_get_32()
#define isr_tick_get() task_tick_get()

#ifdef __cplusplus
}
#endif

#endif /* TICKS_H */