2012-09-30 15:33:13 +08:00
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/*
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* File : completion.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2012, RT-Thread Development Team
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*
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2013-06-28 00:36:54 +08:00
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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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2012-09-30 15:33:13 +08:00
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*
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* Change Logs:
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* Date Author Notes
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* 2012-09-30 Bernard 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 <rtdevice.h>
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2012-11-02 12:05:38 +08:00
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#define RT_COMPLETED 1
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#define RT_UNCOMPLETED 0
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2012-09-30 15:33:13 +08:00
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2012-11-02 12:05:38 +08:00
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void rt_completion_init(struct rt_completion *completion)
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2012-09-30 15:33:13 +08:00
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{
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2012-11-02 12:05:38 +08:00
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rt_base_t level;
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RT_ASSERT(completion != RT_NULL);
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2012-09-30 15:33:13 +08:00
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2012-11-02 12:05:38 +08:00
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level = rt_hw_interrupt_disable();
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completion->flag = RT_UNCOMPLETED;
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rt_list_init(&completion->suspended_list);
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rt_hw_interrupt_enable(level);
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2012-09-30 15:33:13 +08:00
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}
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2015-05-11 12:33:15 +08:00
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RTM_EXPORT(rt_completion_init);
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2012-09-30 15:33:13 +08:00
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2012-11-02 12:05:38 +08:00
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rt_err_t rt_completion_wait(struct rt_completion *completion,
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rt_int32_t timeout)
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2012-09-30 15:33:13 +08:00
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{
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2012-11-02 12:05:38 +08:00
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rt_err_t result;
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rt_base_t level;
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rt_thread_t thread;
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RT_ASSERT(completion != RT_NULL);
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result = RT_EOK;
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thread = rt_thread_self();
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level = rt_hw_interrupt_disable();
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if (completion->flag != RT_COMPLETED)
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{
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/* only one thread can suspend on complete */
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RT_ASSERT(rt_list_isempty(&(completion->suspended_list)));
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if (timeout == 0)
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{
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result = -RT_ETIMEOUT;
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goto __exit;
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}
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else
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{
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/* reset thread error number */
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thread->error = RT_EOK;
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/* suspend thread */
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rt_thread_suspend(thread);
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/* add to suspended list */
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2012-12-26 08:29:42 +08:00
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rt_list_insert_before(&(completion->suspended_list),
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&(thread->tlist));
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2012-11-02 12:05:38 +08:00
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/* current context checking */
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RT_DEBUG_NOT_IN_INTERRUPT;
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/* start timer */
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if (timeout > 0)
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{
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/* reset the timeout of thread timer and start it */
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2012-12-26 08:29:42 +08:00
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rt_timer_control(&(thread->thread_timer),
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RT_TIMER_CTRL_SET_TIME,
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&timeout);
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2012-11-02 12:05:38 +08:00
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rt_timer_start(&(thread->thread_timer));
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}
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/* enable interrupt */
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rt_hw_interrupt_enable(level);
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/* do schedule */
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rt_schedule();
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/* thread is waked up */
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result = thread->error;
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level = rt_hw_interrupt_disable();
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}
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}
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2015-03-24 15:54:08 +08:00
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/* clean completed flag */
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completion->flag = RT_UNCOMPLETED;
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2012-09-30 15:33:13 +08:00
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__exit:
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2012-11-02 12:05:38 +08:00
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rt_hw_interrupt_enable(level);
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2012-11-22 16:43:40 +08:00
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2012-11-02 12:05:38 +08:00
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return result;
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2012-09-30 15:33:13 +08:00
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}
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2015-05-11 12:33:15 +08:00
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RTM_EXPORT(rt_completion_wait);
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2012-09-30 15:33:13 +08:00
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2012-11-02 12:05:38 +08:00
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void rt_completion_done(struct rt_completion *completion)
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2012-09-30 15:33:13 +08:00
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{
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2012-11-02 12:05:38 +08:00
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rt_base_t level;
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RT_ASSERT(completion != RT_NULL);
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if (completion->flag == RT_COMPLETED)
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return;
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level = rt_hw_interrupt_disable();
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completion->flag = RT_COMPLETED;
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if (!rt_list_isempty(&(completion->suspended_list)))
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{
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/* there is one thread in suspended list */
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struct rt_thread *thread;
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/* get thread entry */
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2012-12-26 08:29:42 +08:00
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thread = rt_list_entry(completion->suspended_list.next,
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struct rt_thread,
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tlist);
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2012-11-02 12:05:38 +08:00
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/* resume it */
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rt_thread_resume(thread);
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rt_hw_interrupt_enable(level);
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/* perform a schedule */
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rt_schedule();
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}
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else
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{
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rt_hw_interrupt_enable(level);
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}
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2012-09-30 15:33:13 +08:00
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}
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2015-05-11 12:33:15 +08:00
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RTM_EXPORT(rt_completion_done);
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