166 lines
4.1 KiB
C
166 lines
4.1 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2006-03-12 Bernard first version
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* 2006-05-27 Bernard add support for same priority thread schedule
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* 2006-08-10 Bernard remove the last rt_schedule in rt_tick_increase
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* 2010-03-08 Bernard remove rt_passed_second
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* 2010-05-20 Bernard fix the tick exceeds the maximum limits
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* 2010-07-13 Bernard fix rt_tick_from_millisecond issue found by kuronca
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* 2011-06-26 Bernard add rt_tick_set function.
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* 2018-11-22 Jesven add per cpu tick
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* 2020-12-29 Meco Man implement rt_tick_get_millisecond()
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* 2021-06-01 Meco Man add critical section projection for rt_tick_increase()
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* 2023-09-15 xqyjlj perf rt_hw_interrupt_disable/enable
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* 2023-10-16 RiceChen fix: only the main core detection rt_timer_check(), in SMP mode
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <rtatomic.h>
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#ifdef RT_USING_SMP
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#define rt_tick rt_cpu_index(0)->tick
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#else
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static volatile rt_atomic_t rt_tick = 0;
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#endif /* RT_USING_SMP */
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#if defined(RT_USING_HOOK) && defined(RT_HOOK_USING_FUNC_PTR)
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static void (*rt_tick_hook)(void);
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/**
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* @addtogroup Hook
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*/
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/**@{*/
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/**
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* @brief This function will set a hook function, which will be invoked when tick increase
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*
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*
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* @param hook the hook function
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*/
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void rt_tick_sethook(void (*hook)(void))
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{
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rt_tick_hook = hook;
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}
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/**@}*/
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#endif /* RT_USING_HOOK */
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/**
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* @addtogroup Clock
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*/
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/**@{*/
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/**
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* @brief This function will return current tick from operating system startup.
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*
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* @return Return current tick.
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*/
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rt_tick_t rt_tick_get(void)
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{
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/* return the global tick */
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return (rt_tick_t)rt_atomic_load(&(rt_tick));
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}
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RTM_EXPORT(rt_tick_get);
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/**
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* @brief This function will set current tick.
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*
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* @param tick is the value that you will set.
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*/
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void rt_tick_set(rt_tick_t tick)
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{
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rt_atomic_store(&(rt_tick), tick);
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}
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/**
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* @brief This function will notify kernel there is one tick passed.
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* Normally, this function is invoked by clock ISR.
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*/
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void rt_tick_increase(void)
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{
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RT_ASSERT(rt_interrupt_get_nest() > 0);
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RT_OBJECT_HOOK_CALL(rt_tick_hook, ());
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/* increase the global tick */
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#ifdef RT_USING_SMP
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/* get percpu and increase the tick */
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rt_atomic_add(&(rt_cpu_self()->tick), 1);
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#else
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rt_atomic_add(&(rt_tick), 1);
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#endif /* RT_USING_SMP */
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/* check time slice */
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rt_sched_tick_increase();
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/* check timer */
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#ifdef RT_USING_SMP
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if (rt_cpu_get_id() != 0)
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{
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return;
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}
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#endif
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rt_timer_check();
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}
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/**
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* @brief This function will calculate the tick from millisecond.
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*
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* @param ms is the specified millisecond.
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* - Negative Number wait forever
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* - Zero not wait
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* - Max 0x7fffffff
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*
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* @return Return the calculated tick.
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*/
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rt_tick_t rt_tick_from_millisecond(rt_int32_t ms)
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{
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rt_tick_t tick;
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if (ms < 0)
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{
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tick = (rt_tick_t)RT_WAITING_FOREVER;
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}
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else
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{
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tick = RT_TICK_PER_SECOND * (ms / 1000);
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tick += (RT_TICK_PER_SECOND * (ms % 1000) + 999) / 1000;
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}
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/* return the calculated tick */
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return tick;
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}
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RTM_EXPORT(rt_tick_from_millisecond);
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/**
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* @brief This function will return the passed millisecond from boot.
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*
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* @note if the value of RT_TICK_PER_SECOND is lower than 1000 or
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* is not an integral multiple of 1000, this function will not
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* provide the correct 1ms-based tick.
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*
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* @return Return passed millisecond from boot.
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*/
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rt_weak rt_tick_t rt_tick_get_millisecond(void)
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{
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#if RT_TICK_PER_SECOND == 0 // make cppcheck happy
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#error "RT_TICK_PER_SECOND must be greater than zero"
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#endif
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#if 1000 % RT_TICK_PER_SECOND == 0u
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return rt_tick_get() * (1000u / RT_TICK_PER_SECOND);
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#else
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#warning "rt-thread cannot provide a correct 1ms-based tick any longer,\
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please redefine this function in another file by using a high-precision hard-timer."
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return 0;
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#endif /* 1000 % RT_TICK_PER_SECOND == 0u */
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}
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/**@}*/
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