File: [local] / prex-old / usr / sample / task / task.c (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:51 2008 UTC (16 years, 2 months ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, PREX_0_7_BASE, HEAD Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*
* Copyright (c) 2005-2006, Kohsuke Ohtani
* 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 author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* task.c - a sample program to run tasks.
*/
#include <prex/prex.h>
#include <stdio.h>
#define NR_TASKS 10
/*
* Create new task
*/
static task_t
task_run(void (*func)(void), char *stack)
{
task_t task;
thread_t th;
if (task_create(task_self(), VM_COPY, &task) != 0)
return 0;
if (thread_create(task, &th) != 0)
return 0;
if (thread_load(th, func, stack) != 0)
return 0;
if (thread_resume(th) != 0)
return 0;
return task;
}
/*
* Function to be called in new task.
*/
static void
hey_yo(void)
{
task_t self;
/*
* Display string
*/
self = task_self();
printf("Task %x: Hey, Yo!\n", (u_int)self);
/*
* Wait 5 sec
*/
timer_sleep(5000, 0);
/*
* Terminate current task.
*/
printf("Task %x: Bye!\n", (u_int)self);
task_terminate(task_self());
}
int
main(int argc, char *argv[])
{
static char stack[1024];
int i;
printf("Task sample program\n");
/* Create new tasks */
for (i = 0; i < NR_TASKS; i++) {
if (task_run(hey_yo, stack + 1024) == 0)
panic("failed to create task");
}
/* Wait here... */
task_suspend(task_self());
return 0;
}