Rev 119 | Rev 483 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
||
| 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 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #include <test.h> |
||
| 30 | #include <arch.h> |
||
| 111 | palkovsky | 31 | #include <arch/atomic.h> |
| 1 | jermar | 32 | #include <print.h> |
| 33 | #include <proc/thread.h> |
||
| 34 | |||
| 35 | #include <synch/waitq.h> |
||
| 36 | #include <synch/rwlock.h> |
||
| 37 | |||
| 38 | #define READERS 50 |
||
| 39 | #define WRITERS 50 |
||
| 40 | |||
| 41 | static rwlock_t rwlock; |
||
| 42 | |||
| 43 | static waitq_t can_start; |
||
| 475 | jermar | 44 | static atomic_t items_read; |
| 45 | static atomic_t items_written; |
||
| 1 | jermar | 46 | |
| 47 | static void writer(void *arg); |
||
| 48 | static void reader(void *arg); |
||
| 49 | static void failed(void); |
||
| 50 | |||
| 51 | void writer(void *arg) |
||
| 52 | { |
||
| 53 | waitq_sleep(&can_start); |
||
| 54 | |||
| 55 | rwlock_write_lock(&rwlock); |
||
| 56 | atomic_inc(&items_written); |
||
| 57 | rwlock_write_unlock(&rwlock); |
||
| 58 | } |
||
| 59 | |||
| 60 | void reader(void *arg) |
||
| 61 | { |
||
| 62 | waitq_sleep(&can_start); |
||
| 63 | |||
| 64 | rwlock_read_lock(&rwlock); |
||
| 65 | atomic_inc(&items_read); |
||
| 66 | rwlock_read_unlock(&rwlock); |
||
| 67 | } |
||
| 68 | |||
| 69 | void failed(void) |
||
| 70 | { |
||
| 71 | printf("Test failed prematurely.\n"); |
||
| 72 | thread_exit(); |
||
| 73 | } |
||
| 74 | |||
| 75 | void test(void) |
||
| 76 | { |
||
| 77 | int i, j, k; |
||
| 78 | int readers, writers; |
||
| 79 | |||
| 80 | printf("Read/write locks test #5\n"); |
||
| 81 | |||
| 82 | waitq_initialize(&can_start); |
||
| 83 | rwlock_initialize(&rwlock); |
||
| 84 | |||
| 85 | for (i=1; i<=3; i++) { |
||
| 86 | thread_t *thrd; |
||
| 87 | |||
| 88 | items_read = 0; |
||
| 89 | items_written = 0; |
||
| 90 | |||
| 91 | readers = i*READERS; |
||
| 92 | writers = (4-i)*WRITERS; |
||
| 93 | |||
| 94 | printf("Creating %d readers and %d writers...", readers, writers); |
||
| 95 | |||
| 96 | for (j=0; j<(READERS+WRITERS)/2; j++) { |
||
| 97 | for (k=0; k<i; k++) { |
||
| 15 | jermar | 98 | thrd = thread_create(reader, NULL, TASK, 0); |
| 1 | jermar | 99 | if (thrd) |
| 100 | thread_ready(thrd); |
||
| 101 | else |
||
| 102 | failed(); |
||
| 103 | } |
||
| 104 | for (k=0; k<(4-i); k++) { |
||
| 15 | jermar | 105 | thrd = thread_create(writer, NULL, TASK, 0); |
| 1 | jermar | 106 | if (thrd) |
| 107 | thread_ready(thrd); |
||
| 108 | else |
||
| 109 | failed(); |
||
| 110 | } |
||
| 111 | } |
||
| 112 | |||
| 113 | printf("ok\n"); |
||
| 114 | |||
| 115 | thread_sleep(1); |
||
| 116 | waitq_wakeup(&can_start, WAKEUP_ALL); |
||
| 117 | |||
| 118 | while (items_read != readers || items_written != writers) { |
||
| 119 | printf("%d readers remaining, %d writers remaining, readers_in=%d\n", readers - items_read, writers - items_written, rwlock.readers_in); |
||
| 120 | thread_usleep(100000); |
||
| 121 | } |
||
| 122 | } |
||
| 123 | printf("Test passed.\n"); |
||
| 124 | } |