71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
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/*
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* File : cputime.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-12-23 Bernard first version
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*/
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#include <rtdevice.h>
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#include <rtthread.h>
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static const struct rt_clock_cputime_ops *_cputime_ops = RT_NULL;
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/**
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* The clock_cpu_getres() function shall return the resolution of CPU time, the
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* number of nanosecond per tick.
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*/
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uint32_t clock_cpu_getres(void)
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{
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if (_cputime_ops)
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return _cputime_ops->cputime_getres();
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rt_set_errno(-ENOSYS);
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return 0;
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}
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/**
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* The clock_cpu_gettime() function shall return the current value of cpu time tick.
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*/
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uint32_t clock_cpu_gettime(void)
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{
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if (_cputime_ops)
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return _cputime_ops->cputime_gettime();
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rt_set_errno(-ENOSYS);
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return 0;
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}
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/**
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* The clock_cpu_seops() function shall set the ops of cpu time.
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*
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* @return always return 0.
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*/
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int clock_cpu_setops(const struct rt_clock_cputime_ops *ops)
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{
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_cputime_ops = ops;
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if (ops)
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{
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RT_ASSERT(ops->cputime_getres != RT_NULL);
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RT_ASSERT(ops->cputime_gettime != RT_NULL);
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}
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return 0;
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}
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