/*
 * 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__

/* HANDLE is used for sys_sem_t but we won't include windows.h */
typedef void* sys_sem_t;
#define SYS_SEM_NULL NULL
#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 lwip_mbox;
typedef struct lwip_mbox* sys_mbox_t;
#define SYS_MBOX_NULL NULL
#define sys_mbox_valid(mbox) (((mbox) != NULL) && (*(mbox) != NULL))
#define sys_mbox_set_invalid(mbox) do { if((mbox) != NULL) { *(mbox) = NULL; }}while(0)

/* DWORD (thread id) is used for sys_thread_t but we won't include windows.h */
typedef u32_t sys_thread_t;

#endif /* __ARCH_SYS_ARCH_H__ */