Annotation of prex/usr/test/mutex/mutex.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: * mutex.c - test priority inheritence of mutex.
32: */
33:
34: #include <prex/prex.h>
35: #include <stdio.h>
36:
37: static mutex_t mtx_A = MUTEX_INITIALIZER;
38: static mutex_t mtx_B, mtx_C;
39:
40: int
41: main(int argc, char *argv[])
42: {
43: int err;
44:
45: printf("Mutex test program\n");
46:
47: /*
48: * Initialize only B
49: */
50: mutex_init(&mtx_B);
51:
52: /*
53: * Lock test
54: */
55: err = mutex_lock(&mtx_A);
56: printf("1) Lock mutex A: err=%d\n", err);
57:
58: err = mutex_lock(&mtx_B);
59: printf("2) Lock mutex B: err=%d\n", err);
60:
61: /* Error: Mutex C is not initialized. */
62: err = mutex_lock(&mtx_C);
63: printf("3e) Lock mutex C: err=%d\n", err);
64:
65: /*
66: * Unlock test
67: */
68: err = mutex_unlock(&mtx_A);
69: printf("4) Unlock mutex A: err=%d\n", err);
70:
71: err = mutex_unlock(&mtx_B);
72: printf("5) Unlock mutex B: err=%d\n", err);
73:
74: /* Error: Mutex C is not initialized. */
75: err = mutex_unlock(&mtx_C);
76: printf("6e) Unlock mutex B: err=%d\n", err);
77:
78: /* Error: B is not locked. */
79: err = mutex_unlock(&mtx_B);
80: printf("7e) Unlock mutex B: err=%d\n", err);
81:
82: /*
83: * Destoroy mutex.
84: */
85: mutex_destroy(&mtx_B);
86:
87: /* Error: Mutex B is destoroyed. */
88: err = mutex_lock(&mtx_B);
89: printf("8e) Lock mutex B: err=%d\n", err);
90:
91: /*
92: * Double lock test
93: */
94: err = mutex_lock(&mtx_A);
95: printf("9) Lock mutex A: err=%d\n", err);
96:
97: /* Erorr: Mutex A is already locked */
98: err = mutex_lock(&mtx_A);
99: printf("10e) Lock mutex A: err=%d\n", err);
100:
101: err = mutex_unlock(&mtx_A);
102: printf("11) Unlock mutex A: err=%d\n", err);
103:
104: return 0;
105: }
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