Annotation of prex/usr/test/sem/sem.c, Revision 1.1.1.1
1.1 nbrk 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: * sem.c - test program for semaphore.
32: */
33:
34: #include <prex/prex.h>
35: #include <stdio.h>
36:
37: int
38: main(int argc, char *argv[])
39: {
40: sem_t sem;
41: int err;
42: u_int val;
43:
44: printf("Semaphore test program\n");
45:
46: /*
47: * Test initialize
48: */
49: sem_init(&sem, 3);
50:
51: /*
52: * Test wait
53: */
54: err = sem_getvalue(&sem, &val);
55: printf("Semaphore value=%d\n", val);
56:
57: printf("1) Wait semahore\n");
58: err = sem_wait(&sem, 0);
59: if (err)
60: panic("wait err");
61:
62: err = sem_getvalue(&sem, &val);
63: printf("Semaphore value=%d\n", val);
64:
65: printf("2) Wait semahore\n");
66: err = sem_wait(&sem, 0);
67: if (err)
68: panic("wait err");
69:
70: err = sem_getvalue(&sem, &val);
71: printf("Semaphore value=%d\n", val);
72:
73: printf("3) Wait semahore\n");
74: err = sem_wait(&sem, 0);
75: if (err)
76: panic("wait err");
77:
78: err = sem_getvalue(&sem, &val);
79: printf("Semaphore value=%d\n", val);
80:
81: #if 0
82: /*
83: * Sleep by wait
84: */
85: printf("4) Wait semahore\n");
86: err = sem_wait(&sem, 0);
87: if (err)
88: panic("wait err");
89: #endif
90: /*
91: * trywait must be error.
92: */
93: printf("4e) Try to wait semahore\n");
94: err = sem_trywait(&sem);
95: printf("Try wait err=%d\n", err);
96:
97: /*
98: * Test post
99: */
100: printf("5) Post semahore\n");
101: err = sem_post(&sem);
102: if (err)
103: panic("post err");
104: err = sem_getvalue(&sem, &val);
105: printf("Semaphore value=%d\n", val);
106:
107: printf("Test complete\n");
108: return 0;
109: }
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