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/* ... */
#ifndef __SYS_ARCH_H__
#define __SYS_ARCH_H__
#include "lwip/opt.h"
#if (NO_SYS != 0)
#error "NO_SYS need to be set to 0 to use threaded API"
#endif
#include "cmsis_os.h"
#ifdef __cplusplus
extern "C" {
#endif
#if (osCMSIS < 0x20000U)
#define SYS_MBOX_NULL (osMessageQId)0
#define SYS_SEM_NULL (osSemaphoreId)0
typedef osSemaphoreId sys_sem_t;
typedef osSemaphoreId sys_mutex_t;
typedef osMessageQId sys_mbox_t;
typedef osThreadId sys_thread_t;/* ... */
#else
#define SYS_MBOX_NULL (osMessageQueueId_t)0
#define SYS_SEM_NULL (osSemaphoreId_t)0
typedef osSemaphoreId_t sys_sem_t;
typedef osSemaphoreId_t sys_mutex_t;
typedef osMessageQueueId_t sys_mbox_t;
typedef osThreadId_t sys_thread_t;/* ... */
#endif
#ifdef __cplusplus
}extern "C" { ... }
#endif
/* ... */
#endif