scoutos / prex-0.9.0 / usr / test / mutex / mutex.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * mutex.c - test priority inheritance of mutex.
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32 | */
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33 | |||
34 | #include <sys/prex.h> |
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35 | #include <stdio.h> |
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36 | |||
37 | static mutex_t mtx_A = MUTEX_INITIALIZER;
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38 | static mutex_t mtx_B, mtx_C;
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39 | |||
40 | int
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41 | main(int argc, char *argv[]) |
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42 | { |
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43 | int error;
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44 | |||
45 | printf("Mutex test program\n");
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46 | |||
47 | /*
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48 | * Initialize only B
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49 | */
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50 | mutex_init(&mtx_B); |
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51 | |||
52 | /*
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53 | * Lock test
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54 | */
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55 | error = mutex_lock(&mtx_A); |
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56 | printf("1) Lock mutex A: error=%d\n", error);
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57 | |||
58 | error = mutex_lock(&mtx_B); |
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59 | printf("2) Lock mutex B: error=%d\n", error);
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60 | |||
61 | /* Error: Mutex C is not initialized. */
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62 | error = mutex_lock(&mtx_C); |
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63 | printf("3e) Lock mutex C: error=%d\n", error);
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64 | |||
65 | /*
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66 | * Unlock test
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67 | */
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68 | error = mutex_unlock(&mtx_A); |
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69 | printf("4) Unlock mutex A: error=%d\n", error);
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70 | |||
71 | error = mutex_unlock(&mtx_B); |
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72 | printf("5) Unlock mutex B: error=%d\n", error);
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73 | |||
74 | /* Error: Mutex C is not initialized. */
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75 | error = mutex_unlock(&mtx_C); |
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76 | printf("6e) Unlock mutex B: error=%d\n", error);
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77 | |||
78 | /* Error: B is not locked. */
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79 | error = mutex_unlock(&mtx_B); |
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80 | printf("7e) Unlock mutex B: error=%d\n", error);
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81 | |||
82 | /*
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83 | * Destoroy mutex.
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84 | */
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85 | mutex_destroy(&mtx_B); |
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86 | |||
87 | /* Error: Mutex B is destoroyed. */
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88 | error = mutex_lock(&mtx_B); |
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89 | printf("8e) Lock mutex B: error=%d\n", error);
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90 | |||
91 | /*
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92 | * Double lock test
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93 | */
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94 | error = mutex_lock(&mtx_A); |
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95 | printf("9) Lock mutex A: error=%d\n", error);
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96 | |||
97 | /* Erorr: Mutex A is already locked */
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98 | error = mutex_lock(&mtx_A); |
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99 | printf("10e) Lock mutex A: error=%d\n", error);
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100 | |||
101 | error = mutex_unlock(&mtx_A); |
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102 | printf("11) Unlock mutex A: error=%d\n", error);
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103 | |||
104 | printf("Test completed...\n");
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105 | return 0; |
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106 | } |