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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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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 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <test.h> |
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30 | #include <arch.h> |
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1104 | jermar | 31 | #include <atomic.h> |
1 | jermar | 32 | #include <print.h> |
33 | #include <proc/thread.h> |
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34 | |||
35 | #include <synch/rwlock.h> |
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36 | |||
37 | #define READERS 50 |
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38 | #define WRITERS 50 |
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39 | |||
40 | static rwlock_t rwlock; |
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41 | |||
2022 | decky | 42 | static void reader(void *arg) |
1 | jermar | 43 | { |
1658 | vana | 44 | thread_detach(THREAD); |
45 | |||
15 | jermar | 46 | printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", CPU->id, THREAD->tid); |
1 | jermar | 47 | rwlock_read_lock(&rwlock); |
48 | rwlock_read_unlock(&rwlock); |
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15 | jermar | 49 | printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid); |
1 | jermar | 50 | |
15 | jermar | 51 | printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", CPU->id, THREAD->tid); |
1 | jermar | 52 | |
53 | rwlock_write_lock(&rwlock); |
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54 | rwlock_write_unlock(&rwlock); |
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15 | jermar | 55 | printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid); |
1 | jermar | 56 | } |
57 | |||
2050 | decky | 58 | char * test_rwlock3(bool quiet) |
1 | jermar | 59 | { |
60 | int i; |
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61 | thread_t *thrd; |
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62 | |||
63 | rwlock_initialize(&rwlock); |
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64 | rwlock_write_lock(&rwlock); |
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65 | |||
2028 | decky | 66 | for (i = 0; i < 4; i++) { |
2042 | decky | 67 | thrd = thread_create(reader, NULL, TASK, 0, "reader", false); |
1 | jermar | 68 | if (thrd) |
69 | thread_ready(thrd); |
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70 | else |
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2028 | decky | 71 | printf("Could not create reader %d\n", i); |
1 | jermar | 72 | } |
73 | |||
74 | thread_sleep(1); |
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75 | |||
76 | rwlock_write_unlock(&rwlock); |
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2028 | decky | 77 | |
78 | return NULL; |
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1 | jermar | 79 | } |