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/*
* File : waitqueue.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2018, 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
* 2018/06/26 Bernard Fix the wait queue issue when wakeup a soon
* to blocked thread.
*/
#ifndef WAITQUEUE_H__
#define WAITQUEUE_H__
#include <rtthread.h>
#define RT_WQ_FLAG_CLEAN 0x00
#define RT_WQ_FLAG_WAKEUP 0x01
struct rt_wqueue_node;
typedef int (*rt_wqueue_func_t)(struct rt_wqueue_node *wait, void *key);
struct rt_wqueue_node
{
rt_thread_t polling_thread;
rt_list_t list;
rt_wqueue_func_t wakeup;
rt_uint32_t key;
};
typedef struct rt_wqueue_node rt_wqueue_node_t;
int __wqueue_default_wake(struct rt_wqueue_node *wait, void *key);
rt_inline void rt_wqueue_init(rt_wqueue_t *queue)
{
RT_ASSERT(queue != RT_NULL);
queue->flag = RT_WQ_FLAG_CLEAN;
rt_list_init(&(queue->waiting_list));
}
void rt_wqueue_add(rt_wqueue_t *queue, struct rt_wqueue_node *node);
void rt_wqueue_remove(struct rt_wqueue_node *node);
int rt_wqueue_wait(rt_wqueue_t *queue, int condition, int timeout);
void rt_wqueue_wakeup(rt_wqueue_t *queue, void *key);
#define DEFINE_WAIT_FUNC(name, function) \
struct rt_wqueue_node name = { \
rt_current_thread, \
RT_LIST_OBJECT_INIT(((name).list)), \
\
function, \
0 \
}
#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, __wqueue_default_wake)
#endif
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