Annotation of prex/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: }
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