132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Oliver Schmidt <ol.sc@web.de>
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*
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* $Id: multi-threading.c,v 1.2 2007/04/04 17:41:28 oliverschmidt Exp $
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*/
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/**
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* \file
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* A very simple Contiki application showing how to use the Contiki
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* Multi-threading library
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* \author
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* Oliver Schmidt <ol.sc@web.de>
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*/
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#ifdef __CYGWIN__
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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/* The Contiki Multi-threading library is on Windows implemented using
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* Win32 fibers. The Cygwin C-library implements Thread-Local-Storage
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* in a way that is incompatible with fibers. Therefore most Cygwin
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* C-library functions don't work when called from a Contiki thread.
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*
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* So the sample application calls the Win32 function wsprintf instead
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* of the Cygwin function sprintf from its Contiki threads. */
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#define sprintf wsprintf
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#endif /* __CYGWIN__ */
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#include <stdio.h>
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#include "contiki.h"
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#include "sys/mt.h"
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static char buf[10];
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PROCESS(multi_threading_process, "Multi-threading process");
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AUTOSTART_PROCESSES(&multi_threading_process);
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/*---------------------------------------------------------------------------*/
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static void
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thread_func(char *str, int len)
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{
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sprintf(buf, "%s\n", str + len);
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mt_yield();
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if(len) {
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thread_func(str, len - 1);
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mt_yield();
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}
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sprintf(buf, "%s\n", str + len);
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}
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/*---------------------------------------------------------------------------*/
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static void
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thread_main(void *data)
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{
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while(1) {
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thread_func((char *)data, 8);
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}
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mt_exit();
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(multi_threading_process, ev, data)
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{
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static struct mt_thread alpha_thread;
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static struct mt_thread count_thread;
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static struct etimer timer;
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static int toggle;
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PROCESS_BEGIN();
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mt_init();
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mt_start(&alpha_thread, thread_main, "IHGFEDCBA");
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mt_start(&count_thread, thread_main, "987654321");
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etimer_set(&timer, CLOCK_SECOND / 2);
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while(1) {
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PROCESS_WAIT_EVENT();
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if(ev == PROCESS_EVENT_TIMER) {
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if(toggle) {
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mt_exec(&alpha_thread);
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toggle--;
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} else {
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mt_exec(&count_thread);
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toggle++;
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}
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printf(buf);
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etimer_set(&timer, CLOCK_SECOND / 2);
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}
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}
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mt_stop(&alpha_thread);
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mt_stop(&count_thread);
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mt_remove();
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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