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| Rev | Author | Line No. | Line |
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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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| 31 | #include <arch/atomic.h> |
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| 32 | #include <print.h> |
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| 33 | #include <proc/thread.h> |
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| 34 | |||
| 35 | #include <synch/waitq.h> |
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| 36 | #include <synch/semaphore.h> |
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| 37 | |||
| 38 | #define AT_ONCE 3 |
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| 39 | #define PRODUCERS 50 |
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| 40 | #define CONSUMERS 50 |
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| 41 | |||
| 42 | static semaphore_t sem; |
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| 43 | |||
| 44 | static waitq_t can_start; |
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| 45 | static int items_produced; |
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| 46 | static int items_consumed; |
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| 47 | |||
| 48 | static void consumer(void *arg); |
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| 49 | static void producer(void *arg); |
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| 50 | static void failed(void); |
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| 51 | |||
| 52 | void producer(void *arg) |
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| 53 | { |
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| 54 | waitq_sleep(&can_start); |
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| 55 | |||
| 56 | semaphore_down(&sem); |
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| 57 | atomic_inc(&items_produced); |
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| 58 | thread_usleep(250); |
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| 59 | semaphore_up(&sem); |
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| 60 | } |
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| 61 | |||
| 62 | void consumer(void *arg) |
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| 63 | { |
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| 64 | waitq_sleep(&can_start); |
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| 65 | |||
| 66 | semaphore_down(&sem); |
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| 67 | atomic_inc(&items_consumed); |
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| 68 | thread_usleep(500); |
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| 69 | semaphore_up(&sem); |
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| 70 | } |
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| 71 | |||
| 72 | void failed(void) |
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| 73 | { |
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| 74 | printf("Test failed prematurely.\n"); |
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| 75 | thread_exit(); |
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| 76 | } |
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| 77 | |||
| 78 | void test(void) |
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| 79 | { |
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| 80 | int i, j, k; |
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| 81 | int consumers, producers; |
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| 82 | |||
| 83 | printf("Semaphore test #1\n"); |
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| 84 | |||
| 85 | waitq_initialize(&can_start); |
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| 86 | semaphore_initialize(&sem, AT_ONCE); |
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| 87 | |||
| 88 | |||
| 89 | for (i=1; i<=3; i++) { |
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| 90 | thread_t *thrd; |
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| 91 | |||
| 92 | items_produced = 0; |
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| 93 | items_consumed = 0; |
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| 94 | |||
| 95 | consumers = i * CONSUMERS; |
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| 96 | producers = (4-i) * PRODUCERS; |
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| 97 | |||
| 98 | printf("Creating %d consumers and %d producers...", consumers, producers); |
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| 99 | |||
| 100 | for (j=0; j<(CONSUMERS+PRODUCERS)/2; j++) { |
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| 101 | for (k=0; k<i; k++) { |
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| 102 | thrd = thread_create(consumer, NULL, the->task, 0); |
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| 103 | if (thrd) |
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| 104 | thread_ready(thrd); |
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| 105 | else |
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| 106 | failed(); |
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| 107 | } |
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| 108 | for (k=0; k<(4-i); k++) { |
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| 109 | thrd = thread_create(producer, NULL, the->task, 0); |
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| 110 | if (thrd) |
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| 111 | thread_ready(thrd); |
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| 112 | else |
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| 113 | failed(); |
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| 114 | } |
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| 115 | } |
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| 116 | |||
| 117 | printf("ok\n"); |
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| 118 | |||
| 119 | thread_sleep(1); |
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| 120 | waitq_wakeup(&can_start, WAKEUP_ALL); |
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| 121 | |||
| 122 | while (items_consumed != consumers || items_produced != producers) { |
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| 123 | printf("%d consumers remaining, %d producers remaining\n", consumers - items_consumed, producers - items_produced); |
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| 124 | thread_sleep(1); |
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| 125 | } |
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| 126 | } |
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| 127 | printf("Test passed.\n"); |
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| 128 | } |