/* * Copyright (c) 2007, 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 Contiki operating system. * * Author: Oliver Schmidt <ol.sc@web.de> * * $Id: multi-threading.c,v 1.4 2008/05/26 09:12:22 oliverschmidt Exp $ */ /** * \file * A very simple Contiki application showing how to use the Contiki * Multi-threading library * \author * Oliver Schmidt <ol.sc@web.de> */ /* The Contiki Multi-threading library is on Windows implemented using * Win32 fibers. The Cygwin C-library implements Thread-Local-Storage * in a way that is incompatible with fibers. Therefore most Cygwin * C-library functions don't work when called from a Contiki thread. */ #include "contiki.h" #include "sys/log.h" #include "sys/mt.h" static char *ptr; PROCESS(multi_threading_process, "Multi-threading process"); AUTOSTART_PROCESSES(&multi_threading_process); /*---------------------------------------------------------------------------*/ static void thread_func(char *str, int len) { ptr = str + len; mt_yield(); if(len) { thread_func(str, len - 1); mt_yield(); } ptr = str + len; } /*---------------------------------------------------------------------------*/ static void thread_main(void *data) { while(1) { thread_func((char *)data, 9); } mt_exit(); } /*---------------------------------------------------------------------------*/ PROCESS_THREAD(multi_threading_process, ev, data) { static struct mt_thread alpha_thread; static struct mt_thread count_thread; static struct etimer timer; static int toggle; PROCESS_BEGIN(); mt_init(); mt_start(&alpha_thread, thread_main, "JIHGFEDCBA"); mt_start(&count_thread, thread_main, "9876543210"); etimer_set(&timer, CLOCK_SECOND / 2); while(1) { PROCESS_WAIT_EVENT(); if(ev == PROCESS_EVENT_TIMER) { if(toggle) { mt_exec(&alpha_thread); toggle--; } else { mt_exec(&count_thread); toggle++; } log_message(ptr, ""); etimer_set(&timer, CLOCK_SECOND / 2); } } mt_stop(&alpha_thread); mt_stop(&count_thread); mt_remove(); PROCESS_END(); } /*---------------------------------------------------------------------------*/