root / prex-0.9.0 / usr / sample / thread / thread.c @ 03e9c04a
History | View | Annotate | Download (3.57 KB)
1 |
/*
|
---|---|
2 |
* Copyright (c) 2005, 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 |
* thread.c - sample program to create three threads.
|
32 |
*/
|
33 |
|
34 |
#include <sys/prex.h> |
35 |
#include <stdio.h> |
36 |
|
37 |
#define VERBOSE_MODE
|
38 |
|
39 |
#ifdef VERBOSE_MODE
|
40 |
#define thr_printf(s) sys_log(s)
|
41 |
#else
|
42 |
#define thr_printf(s)
|
43 |
#endif
|
44 |
|
45 |
static thread_t main_th;
|
46 |
static char stack[3][1024]; |
47 |
|
48 |
/*
|
49 |
* Run specified routine as new thread.
|
50 |
*/
|
51 |
static int |
52 |
thread_run(void (*start)(void), void *stack) |
53 |
{ |
54 |
thread_t t; |
55 |
|
56 |
if (thread_create(task_self(), &t) != 0) |
57 |
return -1; |
58 |
|
59 |
if (thread_load(t, start, stack) != 0) |
60 |
return -1; |
61 |
|
62 |
if (thread_setpri(t, 128) != 0) |
63 |
return -1; |
64 |
|
65 |
if (thread_resume(t) != 0) |
66 |
return -1; |
67 |
return 0; |
68 |
} |
69 |
|
70 |
/*
|
71 |
* Display 'AAAA...'
|
72 |
*/
|
73 |
static void |
74 |
thread_A(void)
|
75 |
{ |
76 |
int i;
|
77 |
|
78 |
thr_printf("\nthread A is starting\n");
|
79 |
|
80 |
for (i = 0; i < 1024; i++) { |
81 |
thr_printf("A");
|
82 |
if ((i & 0xff) == 0) |
83 |
thread_yield(); |
84 |
} |
85 |
thr_printf("\nthread A is terminated\n");
|
86 |
thread_terminate(thread_self()); |
87 |
} |
88 |
|
89 |
/*
|
90 |
* Display 'BBBB...'
|
91 |
*/
|
92 |
static void |
93 |
thread_B(void)
|
94 |
{ |
95 |
int i;
|
96 |
|
97 |
thr_printf("\nthread B is starting\n");
|
98 |
|
99 |
for (i = 0; i < 4096; i++) { |
100 |
thr_printf("B");
|
101 |
if ((i & 0xff) == 0) |
102 |
thread_yield(); |
103 |
} |
104 |
thr_printf("\nthread B is terminated\n");
|
105 |
thread_terminate(thread_self()); |
106 |
} |
107 |
|
108 |
/*
|
109 |
* Display 'CCCC...'
|
110 |
*/
|
111 |
static void |
112 |
thread_C(void)
|
113 |
{ |
114 |
int i;
|
115 |
|
116 |
thr_printf("\nthread C is starting\n");
|
117 |
|
118 |
for (i = 0; i < 8192; i++) { |
119 |
thr_printf("C");
|
120 |
if ((i & 0xff) == 0) |
121 |
thread_yield(); |
122 |
} |
123 |
thr_printf("\nthread C is terminated\n");
|
124 |
thread_terminate(thread_self()); |
125 |
} |
126 |
|
127 |
int
|
128 |
main(int argc, char *argv[]) |
129 |
{ |
130 |
int error;
|
131 |
|
132 |
printf("Thread sample program\n");
|
133 |
main_th = thread_self(); |
134 |
|
135 |
timer_sleep(1000, 0); |
136 |
|
137 |
/*
|
138 |
* Raise this thread's priority.
|
139 |
*/
|
140 |
error = thread_setpri(main_th, 100);
|
141 |
|
142 |
/*
|
143 |
* Run threads as normal priority thread.
|
144 |
*/
|
145 |
thread_run(thread_A, stack[0]+1024); |
146 |
thread_run(thread_B, stack[1]+1024); |
147 |
thread_run(thread_C, stack[2]+1024); |
148 |
|
149 |
/*
|
150 |
* Lower this thread's priority.
|
151 |
*/
|
152 |
error = thread_setpri(main_th, 254);
|
153 |
/*
|
154 |
* Since other threads have higher priority than
|
155 |
* this thread, the control will come here only when
|
156 |
* all other threads are terminated.
|
157 |
*/
|
158 |
printf("test - OK!\n");
|
159 |
return 0; |
160 |
} |