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- /*
- * File : cputime.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2017, RT-Thread Development Team
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Change Logs:
- * Date Author Notes
- * 2017-12-23 Bernard first version
- */
- #include <rtdevice.h>
- #include <rtthread.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.
- */
- uint32_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.
- */
- uint32_t clock_cpu_gettime(void)
- {
- if (_cputime_ops)
- return _cputime_ops->cputime_gettime();
- rt_set_errno(-ENOSYS);
- return 0;
- }
- /**
- * 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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