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/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
#ifndef __ARCH_SYS_ARCH_H__
#define __ARCH_SYS_ARCH_H__
#include <errno.h>
#define SYS_MBOX_NULL NULL
#define SYS_SEM_NULL NULL
typedef u32_t sys_prot_t;
struct sys_sem;
typedef struct sys_sem * sys_sem_t;
#define sys_sem_valid(sem) (((sem) != NULL) && (*(sem) != NULL))
#define sys_sem_set_invalid(sem) do { if((sem) != NULL) { *(sem) = NULL; }}while(0)
/* let sys.h use binary semaphores for mutexes */
#define LWIP_COMPAT_MUTEX 1
struct sys_mbox;
typedef struct sys_mbox *sys_mbox_t;
#define sys_mbox_valid(mbox) (((mbox) != NULL) && (*(mbox) != NULL))
#define sys_mbox_set_invalid(mbox) do { if((mbox) != NULL) { *(mbox) = NULL; }}while(0)
struct sys_thread;
typedef struct sys_thread * sys_thread_t;
#endif /* __ARCH_SYS_ARCH_H__ */
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