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Annotation of prex-old/usr/sample/task/task.c, Revision 1.1.1.1

1.1       nbrk        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:  */
                     29:
                     30: /*
                     31:  * task.c - a sample program to run tasks.
                     32:  */
                     33:
                     34: #include <prex/prex.h>
                     35: #include <stdio.h>
                     36:
                     37: #define NR_TASKS 10
                     38:
                     39: /*
                     40:  * Create new task
                     41:  */
                     42: static task_t
                     43: task_run(void (*func)(void), char *stack)
                     44: {
                     45:        task_t task;
                     46:        thread_t th;
                     47:
                     48:        if (task_create(task_self(), VM_COPY, &task) != 0)
                     49:                return 0;
                     50:
                     51:        if (thread_create(task, &th) != 0)
                     52:                return 0;
                     53:
                     54:        if (thread_load(th, func, stack) != 0)
                     55:                return 0;
                     56:
                     57:        if (thread_resume(th) != 0)
                     58:                return 0;
                     59:
                     60:        return task;
                     61: }
                     62:
                     63: /*
                     64:  * Function to be called in new task.
                     65:  */
                     66: static void
                     67: hey_yo(void)
                     68: {
                     69:        task_t self;
                     70:
                     71:        /*
                     72:         * Display string
                     73:         */
                     74:        self = task_self();
                     75:        printf("Task %x: Hey, Yo!\n", (u_int)self);
                     76:
                     77:        /*
                     78:         * Wait 5 sec
                     79:         */
                     80:        timer_sleep(5000, 0);
                     81:
                     82:        /*
                     83:         * Terminate current task.
                     84:         */
                     85:        printf("Task %x: Bye!\n", (u_int)self);
                     86:        task_terminate(task_self());
                     87: }
                     88:
                     89: int
                     90: main(int argc, char *argv[])
                     91: {
                     92:        static char stack[1024];
                     93:        int i;
                     94:
                     95:        printf("Task sample program\n");
                     96:
                     97:        /*  Create new tasks */
                     98:        for (i = 0; i < NR_TASKS; i++) {
                     99:                if (task_run(hey_yo, stack + 1024) == 0)
                    100:                        panic("failed to create task");
                    101:        }
                    102:
                    103:        /* Wait here... */
                    104:        task_suspend(task_self());
                    105:        return 0;
                    106: }