0,0 → 1,161 |
/* |
* Copyright (C) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
|
#include <test.h> |
#include <arch.h> |
#include <arch/atomic.h> |
#include <print.h> |
#include <proc/thread.h> |
#include <arch/types.h> |
#include <arch/context.h> |
#include <context.h> |
#include <panic.h> |
|
#include <synch/waitq.h> |
#include <synch/rwlock.h> |
#include <synch/synch.h> |
|
#define READERS 50 |
#define WRITERS 50 |
|
static rwlock_t rwlock; |
|
static spinlock_t lock; |
|
static waitq_t can_start; |
|
__u32 seed = 0xdeadbeef; |
|
static __u32 random(__u32 max); |
|
static void writer(void *arg); |
static void reader(void *arg); |
static void failed(void); |
|
__u32 random(__u32 max) |
{ |
__u32 rc; |
ipl_t ipl; |
|
spinlock_lock(&lock); |
rc = seed % max; |
seed = (((seed<<2) ^ (seed>>2)) * 487) + rc; |
spinlock_unlock(&lock); |
return rc; |
} |
|
|
void writer(void *arg) |
{ |
int rc, to; |
waitq_sleep(&can_start); |
|
to = random(40000); |
printf("cpu%d, tid %d w+ (%d)\n", CPU->id, THREAD->tid, to); |
rc = rwlock_write_lock_timeout(&rwlock, to); |
if (SYNCH_FAILED(rc)) { |
printf("cpu%d, tid %d w!\n", CPU->id, THREAD->tid); |
return; |
}; |
printf("cpu%d, tid %d w=\n", CPU->id, THREAD->tid); |
|
if (rwlock.readers_in) panic("Oops."); |
thread_usleep(random(1000000)); |
if (rwlock.readers_in) panic("Oops."); |
|
rwlock_write_unlock(&rwlock); |
printf("cpu%d, tid %d w-\n", CPU->id, THREAD->tid); |
} |
|
void reader(void *arg) |
{ |
int rc, to; |
waitq_sleep(&can_start); |
|
to = random(2000); |
printf("cpu%d, tid %d r+ (%d)\n", CPU->id, THREAD->tid, to); |
rc = rwlock_read_lock_timeout(&rwlock, to); |
if (SYNCH_FAILED(rc)) { |
printf("cpu%d, tid %d r!\n", CPU->id, THREAD->tid); |
return; |
} |
printf("cpu%d, tid %d r=\n", CPU->id, THREAD->tid); |
thread_usleep(30000); |
rwlock_read_unlock(&rwlock); |
printf("cpu%d, tid %d r-\n", CPU->id, THREAD->tid); |
} |
|
void failed(void) |
{ |
printf("Test failed prematurely.\n"); |
thread_exit(); |
} |
|
void test(void) |
{ |
context_t ctx; |
__u32 i, k; |
|
printf("Read/write locks test #4\n"); |
|
waitq_initialize(&can_start); |
rwlock_initialize(&rwlock); |
|
|
|
for (; ;) { |
thread_t *thrd; |
|
context_save(&ctx); |
printf("sp=%X, readers_in=%d\n", ctx.sp, rwlock.readers_in); |
|
k = random(7) + 1; |
printf("Creating %d readers\n", k); |
for (i=0; i<k; i++) { |
thrd = thread_create(reader, NULL, TASK, 0); |
if (thrd) |
thread_ready(thrd); |
else |
failed(); |
} |
|
k = random(5) + 1; |
printf("Creating %d writers\n", k); |
for (i=0; i<k; i++) { |
thrd = thread_create(writer, NULL, TASK, 0); |
if (thrd) |
thread_ready(thrd); |
else |
failed(); |
} |
|
thread_usleep(20000); |
waitq_wakeup(&can_start, WAKEUP_ALL); |
} |
|
} |