113 lines
2.2 KiB
C
113 lines
2.2 KiB
C
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/*
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* File : idle.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-03-23 Bernard the first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "kservice.h"
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#if defined (RT_USING_HOOK) || defined(RT_USING_HEAP)
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#define IDLE_THREAD_STACK_SIZE 256
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#else
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#define IDLE_THREAD_STACK_SIZE 128
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#endif
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static struct rt_thread idle;
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static rt_uint8_t rt_thread_stack[IDLE_THREAD_STACK_SIZE];
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#ifdef RT_USING_HEAP
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extern rt_list_t rt_thread_defunct;
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#endif
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#ifdef RT_USING_HOOK
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/**
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* @addtogroup Hook
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*/
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/*@{*/
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static void (*rt_thread_idle_hook)();
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/**
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* This function will set a hook function to idle thread loop.
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*
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* @param hook the specified hook function
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*
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* @note the hook function must be simple and never be blocked or suspend.
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*/
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void rt_thread_idle_sethook(void (*hook)())
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{
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rt_thread_idle_hook = hook;
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}
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/*@}*/
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#endif
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static void rt_thread_idle_entry(void* parameter)
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{
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while (1)
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{
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#ifdef RT_USING_HOOK
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/* if there is an idle thread hook */
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if (rt_thread_idle_hook != RT_NULL) rt_thread_idle_hook();
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#endif
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#ifdef RT_USING_HEAP
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/* check the defunct thread list */
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if (!rt_list_isempty(&rt_thread_defunct))
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{
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rt_base_t lock;
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struct rt_thread* thread = rt_list_entry(rt_thread_defunct.next, struct rt_thread, tlist);
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/* disable interrupt */
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lock = rt_hw_interrupt_disable();
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rt_list_remove(&(thread->tlist));
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/* enable interrupt */
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rt_hw_interrupt_enable(lock);
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/* release thread's stack */
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rt_free(thread->stack_addr);
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/* delete thread object */
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rt_object_delete((rt_object_t)thread);
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}
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#endif
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}
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}
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/**
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* @addtogroup SystemInit
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*/
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/*@{*/
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/**
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* This function will initialize idle thread, then start it.
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*
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* @note this function must be invoked when system init.
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*/
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void rt_thread_idle_init()
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{
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/* init thread */
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rt_thread_init(&idle,
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"tidle",
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rt_thread_idle_entry, RT_NULL,
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&rt_thread_stack[0], sizeof(rt_thread_stack),
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RT_THREAD_PRIORITY_MAX - 1, 32);
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/* startup */
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rt_thread_startup(&idle);
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}
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/*@}*/
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