92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2006-2021, 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
|
|
*/
|
|
float 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_microsecond() fucntion shall return the microsecond according to
|
|
* cpu_tick parameter.
|
|
*
|
|
* @param cpu_tick the cpu tick
|
|
*
|
|
* @return the microsecond
|
|
*/
|
|
uint32_t clock_cpu_microsecond(uint32_t cpu_tick)
|
|
{
|
|
float unit = clock_cpu_getres();
|
|
|
|
return (uint32_t)((cpu_tick * unit) / 1000);
|
|
}
|
|
|
|
/**
|
|
* The clock_cpu_microsecond() fucntion shall return the millisecond according to
|
|
* cpu_tick parameter.
|
|
*
|
|
* @param cpu_tick the cpu tick
|
|
*
|
|
* @return the millisecond
|
|
*/
|
|
uint32_t clock_cpu_millisecond(uint32_t cpu_tick)
|
|
{
|
|
float unit = clock_cpu_getres();
|
|
|
|
return (uint32_t)((cpu_tick * unit) / (1000 * 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;
|
|
}
|