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DEFINITIONS

1. task_run
2. hey_yo
3. main

   1 /*
   2  * Copyright (c) 2005-2006, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 /*
  31  * task.c - a sample program to run tasks.
  32  */
  34 #include <sys/prex.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  38 #define NR_TASKS 10
  40 /*
  41  * Create new task
  42  */
  43 static task_t
task_run(void (*func)(void))
  45 {
  46         char *stack;
task_t task;
thread_t t;
stack = malloc(1024);
  51         if (task_create(task_self(), VM_SHARE, &task) != 0)
  52                 return 0;
  54         if (thread_create(task, &t) != 0)
  55                 return 0;
  57         if (thread_load(t, func, stack + 1024) != 0)
  58                 return 0;
  60         if (thread_resume(t) != 0)
  61                 return 0;
  63         return task;
  64 }
  66 /*
  67  * Function to be called in new task.
  68  */
  69 static void
hey_yo(void)
  71 {
task_t self;
  74         /*
  75          * Display string
  76          */
self = task_self();
printf("Task %x: Hey, Yo!\n", (u_int)self);
  80         /*
  81          * Wait 5 sec
  82          */
timer_sleep(5000, 0);
  85         /*
  86          * Terminate current task.
  87          */
printf("Task %x: Bye!\n", (u_int)self);
task_terminate(task_self());
  90 }
  92 int
main(int argc, char *argv[])
  94 {
  95         int i;
printf("Task sample program\n");
  99         /*  Create new tasks */
 100         for (i = 0; i < NR_TASKS; i++) {
 101                 if (task_run(hey_yo) == 0)
panic("failed to create task");
 103         }
 105         /* Wait here... */
task_suspend(task_self());
 107         return 0;
 108 }