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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-12-23 Bernard first version
*/
#include <rtdevice.h>
#include <rtthread.h>
#include <sys/errno.h>
static const struct rt_clock_cputime_ops *_cputime_ops = RT_NULL;
/**
* The clock_cpu_getres() function shall return the resolution of CPU time, the
* number of nanosecond per tick.
*
* @return the number of nanosecond per tick(x (1000UL * 1000))
*/
uint64_t clock_cpu_getres(void)
{
if (_cputime_ops)
return _cputime_ops->cputime_getres();
rt_set_errno(ENOSYS);
return 0;
}
/**
* The clock_cpu_gettime() function shall return the current value of cpu time tick.
*
* @return the cpu tick
*/
uint64_t clock_cpu_gettime(void)
{
if (_cputime_ops)
return _cputime_ops->cputime_gettime();
rt_set_errno(ENOSYS);
return 0;
}
/**
* The clock_cpu_settimeout() fucntion set timeout time and timeout callback function
* The timeout callback function will be called when the timeout time is reached
*
* @param tick the Timeout tick
* @param timeout the Timeout function
* @param parameter the Parameters of timeout function
*
*/
int clock_cpu_settimeout(uint64_t tick, void (*timeout)(void *param), void *param)
{
if (_cputime_ops)
return _cputime_ops->cputime_settimeout(tick, timeout, param);
rt_set_errno(ENOSYS);
return 0;
}
int clock_cpu_issettimeout(void)
{
if (_cputime_ops)
return _cputime_ops->cputime_settimeout != RT_NULL;
return RT_FALSE;
}
/**
* The clock_cpu_microsecond() fucntion shall return the microsecond according to
* cpu_tick parameter.
*
* @param cpu_tick the cpu tick
*
* @return the microsecond
*/
uint64_t clock_cpu_microsecond(uint64_t cpu_tick)
{
uint64_t unit = clock_cpu_getres();
return (uint64_t)(((cpu_tick * unit) / (1000UL * 1000)) / 1000);
}
/**
* The clock_cpu_microsecond() fucntion shall return the millisecond according to
* cpu_tick parameter.
*
* @param cpu_tick the cpu tick
*
* @return the millisecond
*/
uint64_t clock_cpu_millisecond(uint64_t cpu_tick)
{
uint64_t unit = clock_cpu_getres();
return (uint64_t)(((cpu_tick * unit) / (1000UL * 1000)) / (1000UL * 1000));
}
/**
* The clock_cpu_seops() function shall set the ops of cpu time.
*
* @return always return 0.
*/
int clock_cpu_setops(const struct rt_clock_cputime_ops *ops)
{
_cputime_ops = ops;
if (ops)
{
RT_ASSERT(ops->cputime_getres != RT_NULL);
RT_ASSERT(ops->cputime_gettime != RT_NULL);
}
return 0;
}
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