www.pudn.com > multitaskRTC.rar > sys.h, change:2006-03-27,size:3392b


/* 
 * Copyright (c) 2001, 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.  
 * 
 * This file is part of the lwIP TCP/IP stack. 
 *  
 * Author: Adam Dunkels <adam@sics.se> 
 * 
 * $Id: sys.h,v 1.1 2001/12/12 10:01:00 adam Exp $ 
 */ 
#ifndef __LWIP_SYS_H__ 
#define __LWIP_SYS_H__ 
 
#include "../INC/TCPIP/netif/cc.h" 
#include "../INC/TCPIP/netif/sys_arch.h" 
 
typedef void (* sys_timeout_handler)(void *arg); 
 
struct sys_timeout { 
  struct sys_timeout *next; 
  u16_t time; 
  sys_timeout_handler h; 
  void *arg; 
}; 
 
struct sys_timeouts { 
  struct sys_timeout *next; 
}; 
 
/* sys_init() must be called before anthing else. */ 
void sys_init(void); 
 
/* 
 * sys_timeout(): 
 * 
 * Schedule a timeout a specified amount of milliseconds in the 
 * future. When the timeout occurs, the specified timeout handler will 
 * be called. The handler will be passed the "arg" argument when 
 * called. 
 * 
 */ 
void sys_timeout(u16_t msecs, sys_timeout_handler h, void *arg); 
struct sys_timeouts *sys_arch_timeouts(void); 
 
/* Semaphore functions. */ 
sys_sem_t sys_sem_new(u8_t count); 
void sys_sem_signal(sys_sem_t sem); 
u16_t sys_arch_sem_wait(sys_sem_t sem, u16_t timeout); 
void sys_sem_free(sys_sem_t sem); 
 
void sys_sem_wait(sys_sem_t sem); 
 
/* Mailbox functions. */ 
sys_mbox_t sys_mbox_new(void); 
void sys_mbox_post(sys_mbox_t mbox, void *msg); 
u16_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u16_t timeout); 
void sys_mbox_free(sys_mbox_t mbox); 
 
void sys_mbox_fetch(sys_mbox_t mbox, void **msg); 
 
/* Thread functions. */ 
void sys_thread_new(void (* thread)(void *arg), void *arg); 
 
/* The following functions are used only in Unix code, and 
   can be omitted when porting the stack. */ 
/* Returns the current time in microseconds. */ 
unsigned long sys_now(void); 
 
#endif /* __LWIP_SYS_H__ */