/**
 * @file sys_arch.h
 * @author zdk
 * @brief LwIP操作系统模拟层实现，基于rt-thread nano
 * @version 0.1
 * @date 2021-08-02
 * 
 * BSD 3-Clause License
 * 
 * Copyright (c) 2021, water_zhang
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * 提供系统模拟层所需的一些宏定义，同时封装操作系统的信号量、邮箱、互斥锁等数据结构
 * 
 */

#if !defined(SYS_ARCH_H)
#define SYS_ARCH_H

#include "rtthread.h"

/* 封装系统内核相关的数据类型 */
typedef rt_sem_t sys_sem_t;       /* 信号量 */
typedef rt_mailbox_t sys_mbox_t;  /* 邮箱 */
typedef rt_thread_t sys_thread_t; /* 线程 */

/* 一些表明对象无效的宏定义 */
#define SYS_MBOX_NULL 
#define SYS_SEM_NULL 

/* 对于不提供互斥锁的系统，设置此宏定义为1，则LwIP会通过信号量自行实现互斥锁 */
/* #define LWIP_COMPAT_MUTEX 1 */

#endif // SYS_ARCH_H