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<h1>sys.h</h1><div class="fragment"><pre>00001 <span class="comment">/*</span>
00002 <span class="comment"> * Copyright (c) 2001, Swedish Institute of Computer Science.</span>
00003 <span class="comment"> * All rights reserved. </span>
00004 <span class="comment"> *</span>
00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without </span>
00006 <span class="comment"> * modification, are permitted provided that the following conditions </span>
00007 <span class="comment"> * are met: </span>
00008 <span class="comment"> * 1. Redistributions of source code must retain the above copyright </span>
00009 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
00010 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright </span>
00011 <span class="comment"> * notice, this list of conditions and the following disclaimer in the </span>
00012 <span class="comment"> * documentation and/or other materials provided with the distribution. </span>
00013 <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors </span>
00014 <span class="comment"> * may be used to endorse or promote products derived from this software </span>
00015 <span class="comment"> * without specific prior written permission. </span>
00016 <span class="comment"> *</span>
00017 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND </span>
00018 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE </span>
00019 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE </span>
00020 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE </span>
00021 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL </span>
00022 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS </span>
00023 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) </span>
00024 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT </span>
00025 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY </span>
00026 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF </span>
00027 <span class="comment"> * SUCH DAMAGE. </span>
00028 <span class="comment"> *</span>
00029 <span class="comment"> * This file is part of the lwIP TCP/IP stack.</span>
00030 <span class="comment"> * </span>
00031 <span class="comment"> * Author: Adam Dunkels <adam@sics.se></span>
00032 <span class="comment"> *</span>
00033 <span class="comment"> * $Id$</span>
00034 <span class="comment"> */</span>
00035 <span class="preprocessor">#ifndef __LWIP_SYS_H__</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#define __LWIP_SYS_H__</span>
00037 <span class="preprocessor"></span>
00038 <span class="preprocessor">#include "arch/cc.h"</span>
00039 <span class="preprocessor">#include "arch/sys_arch.h"</span>
00040
00041 <span class="keyword">typedef</span> void (* sys_timeout_handler)(<span class="keywordtype">void</span> *arg);
00042
00043 <span class="keyword">struct </span>sys_timeout {
00044 <span class="keyword">struct </span>sys_timeout *next;
00045 uInt16 time;
00046 sys_timeout_handler h;
00047 <span class="keywordtype">void</span> *arg;
00048 };
00049
00050 <span class="keyword">struct </span>sys_timeouts {
00051 <span class="keyword">struct </span>sys_timeout *next;
00052 };
00053
00054 <span class="comment">/* sys_init() must be called before anthing else. */</span>
00055 <span class="keywordtype">void</span> sys_init(<span class="keywordtype">void</span>);
00056
00057 <span class="comment">/*</span>
00058 <span class="comment"> * sys_timeout():</span>
00059 <span class="comment"> *</span>
00060 <span class="comment"> * Schedule a timeout a specified amount of milliseconds in the</span>
00061 <span class="comment"> * future. When the timeout occurs, the specified timeout handler will</span>
00062 <span class="comment"> * be called. The handler will be passed the "arg" argument when</span>
00063 <span class="comment"> * called.</span>
00064 <span class="comment"> *</span>
00065 <span class="comment"> */</span>
00066 <span class="keywordtype">void</span> sys_timeout(uInt16 msecs, sys_timeout_handler h, <span class="keywordtype">void</span> *arg);
00067 <span class="keyword">struct </span>sys_timeouts *sys_arch_timeouts(<span class="keywordtype">void</span>);
00068
00069 <span class="comment">/* Semaphore functions. */</span>
00070 sys_sem_t sys_sem_new(uInt8 count);
00071 <span class="keywordtype">void</span> sys_sem_signal(sys_sem_t sem);
00072 uInt16 sys_arch_sem_wait(sys_sem_t sem, uInt16 timeout);
00073 <span class="keywordtype">void</span> sys_sem_free(sys_sem_t sem);
00074
00075 <span class="keywordtype">void</span> sys_sem_wait(sys_sem_t sem);
00076
00077 <span class="comment">/* Mailbox functions. */</span>
00078 sys_mbox_t sys_mbox_new(<span class="keywordtype">void</span>);
00079 <span class="keywordtype">void</span> sys_mbox_post(sys_mbox_t mbox, <span class="keywordtype">void</span> *msg);
00080 uInt16 sys_arch_mbox_fetch(sys_mbox_t mbox, <span class="keywordtype">void</span> **msg, uInt16 timeout);
00081 <span class="keywordtype">void</span> sys_mbox_free(sys_mbox_t mbox);
00082
00083 <span class="keywordtype">void</span> sys_mbox_fetch(sys_mbox_t mbox, <span class="keywordtype">void</span> **msg);
00084
00085 <span class="comment">/* Thread functions. */</span>
00086 <span class="keywordtype">void</span> sys_thread_new(<span class="keywordtype">void</span> (* thread)(<span class="keywordtype">void</span> *arg), <span class="keywordtype">void</span> *arg);
00087
00088 <span class="comment">/* The following functions are used only in Unix code, and</span>
00089 <span class="comment"> can be omitted when porting the stack. */</span>
00090 <span class="comment">/* Returns the current time in microseconds. */</span>
00091 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> sys_now(<span class="keywordtype">void</span>);
00092
00093 <span class="preprocessor">#endif </span><span class="comment">/* __LWIP_SYS_H__ */</span>
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