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/SPARTAN/trunk/test/synch/rwlock1/test.c
0,0 → 1,78
/*
* 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 <synch/waitq.h>
#include <synch/rwlock.h>
 
#define READERS 50
#define WRITERS 50
 
static rwlock_t rwlock;
 
void test(void)
{
printf("Read/write locks test #1\n");
 
rwlock_initialize(&rwlock);
 
rwlock_write_lock(&rwlock);
rwlock_write_unlock(&rwlock);
 
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
 
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_write_lock(&rwlock);
rwlock_write_unlock(&rwlock);
 
rwlock_read_lock(&rwlock);
rwlock_read_unlock(&rwlock);
 
rwlock_write_lock(&rwlock);
rwlock_write_unlock(&rwlock);
 
rwlock_read_lock(&rwlock);
rwlock_read_unlock(&rwlock);
 
printf("Test passed.\n");
}
/SPARTAN/trunk/test/synch/rwlock2/test.c
0,0 → 1,91
/*
* 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 <synch/rwlock.h>
 
#define READERS 50
#define WRITERS 50
 
static rwlock_t rwlock;
 
static void writer(void *arg);
static void failed(void *arg);
 
void writer(void *arg)
{
printf("Trying to lock rwlock for writing....\n");
 
rwlock_write_lock(&rwlock);
rwlock_write_unlock(&rwlock);
printf("Trying to lock rwlock for reading....\n");
rwlock_read_lock(&rwlock);
rwlock_read_unlock(&rwlock);
printf("Test passed.\n");
}
 
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
 
void test(void)
{
thread_t *thrd;
printf("Read/write locks test #2\n");
rwlock_initialize(&rwlock);
 
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
rwlock_read_lock(&rwlock);
thrd = thread_create(writer, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
 
 
thread_sleep(1);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
rwlock_read_unlock(&rwlock);
 
}
/SPARTAN/trunk/test/synch/rwlock3/test.c
0,0 → 1,91
/*
* 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 <synch/rwlock.h>
 
#define READERS 50
#define WRITERS 50
 
static rwlock_t rwlock;
 
static void reader(void *arg);
static void failed(void *arg);
 
void reader(void *arg)
{
printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", the->cpu->id, the->thread->tid);
rwlock_read_lock(&rwlock);
rwlock_read_unlock(&rwlock);
printf("cpu%d, tid %d: success\n", the->cpu->id, the->thread->tid);
 
printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", the->cpu->id, the->thread->tid);
 
rwlock_write_lock(&rwlock);
rwlock_write_unlock(&rwlock);
printf("cpu%d, tid %d: success\n", the->cpu->id, the->thread->tid);
printf("Test passed.\n");
 
}
 
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
 
void test(void)
{
int i;
thread_t *thrd;
printf("Read/write locks test #2\n");
rwlock_initialize(&rwlock);
 
rwlock_write_lock(&rwlock);
for (i=0; i<4; i++) {
thrd = thread_create(reader, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
 
 
thread_sleep(1);
rwlock_write_unlock(&rwlock);
}
/SPARTAN/trunk/test/synch/semaphore1/test.c
0,0 → 1,128
/*
* 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 <synch/waitq.h>
#include <synch/semaphore.h>
 
#define AT_ONCE 3
#define PRODUCERS 50
#define CONSUMERS 50
 
static semaphore_t sem;
 
static waitq_t can_start;
static int items_produced;
static int items_consumed;
 
static void consumer(void *arg);
static void producer(void *arg);
static void failed(void);
 
void producer(void *arg)
{
waitq_sleep(&can_start);
semaphore_down(&sem);
atomic_inc(&items_produced);
thread_usleep(250);
semaphore_up(&sem);
}
 
void consumer(void *arg)
{
waitq_sleep(&can_start);
semaphore_down(&sem);
atomic_inc(&items_consumed);
thread_usleep(500);
semaphore_up(&sem);
}
 
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
 
void test(void)
{
int i, j, k;
int consumers, producers;
printf("Semaphore test #1\n");
waitq_initialize(&can_start);
semaphore_initialize(&sem, AT_ONCE);
 
 
for (i=1; i<=3; i++) {
thread_t *thrd;
 
items_produced = 0;
items_consumed = 0;
consumers = i * CONSUMERS;
producers = (4-i) * PRODUCERS;
printf("Creating %d consumers and %d producers...", consumers, producers);
for (j=0; j<(CONSUMERS+PRODUCERS)/2; j++) {
for (k=0; k<i; k++) {
thrd = thread_create(consumer, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
for (k=0; k<(4-i); k++) {
thrd = thread_create(producer, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
}
 
printf("ok\n");
 
thread_sleep(1);
waitq_wakeup(&can_start, WAKEUP_ALL);
while (items_consumed != consumers || items_produced != producers) {
printf("%d consumers remaining, %d producers remaining\n", consumers - items_consumed, producers - items_produced);
thread_sleep(1);
}
}
printf("Test passed.\n");
}
/SPARTAN/trunk/test/synch/rwlock4/test.c
0,0 → 1,158
/*
* 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 <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 = 0xdeadbeaf;
 
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;
 
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", the->cpu->id, the->thread->tid, to);
rc = rwlock_write_lock_timeout(&rwlock, to);
if (SYNCH_FAILED(rc)) {
printf("cpu%d, tid %d w!\n", the->cpu->id, the->thread->tid);
return;
};
printf("cpu%d, tid %d w=\n", the->cpu->id, the->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", the->cpu->id, the->thread->tid);
}
 
void reader(void *arg)
{
int rc, to;
waitq_sleep(&can_start);
to = random(2000);
printf("cpu%d, tid %d r+ (%d)\n", the->cpu->id, the->thread->tid, to);
rc = rwlock_read_lock_timeout(&rwlock, to);
if (SYNCH_FAILED(rc)) {
printf("cpu%d, tid %d r!\n", the->cpu->id, the->thread->tid);
return;
}
printf("cpu%d, tid %d r=\n", the->cpu->id, the->thread->tid);
thread_usleep(30000);
rwlock_read_unlock(&rwlock);
printf("cpu%d, tid %d r-\n", the->cpu->id, the->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, the->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, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
thread_usleep(20000);
waitq_wakeup(&can_start, WAKEUP_ALL);
}
 
}
/SPARTAN/trunk/test/synch/semaphore2/test.c
0,0 → 1,121
/*
* 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 <synch/waitq.h>
#include <synch/semaphore.h>
#include <synch/synch.h>
 
static semaphore_t sem;
 
static spinlock_t lock;
 
static waitq_t can_start;
 
__u32 seed = 0xdeadbeaf;
 
static __u32 random(__u32 max);
 
static void consumer(void *arg);
static void failed(void);
 
__u32 random(__u32 max)
{
__u32 rc;
 
spinlock_lock(&lock);
rc = seed % max;
seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
spinlock_unlock(&lock);
return rc;
}
 
 
void consumer(void *arg)
{
int rc, to;
waitq_sleep(&can_start);
to = random(20000);
printf("cpu%d, tid %d down+ (%d)\n", the->cpu->id, the->thread->tid, to);
rc = semaphore_down_timeout(&sem, to);
if (SYNCH_FAILED(rc)) {
printf("cpu%d, tid %d down!\n", the->cpu->id, the->thread->tid);
return;
}
printf("cpu%d, tid %d down=\n", the->cpu->id, the->thread->tid);
thread_usleep(random(30000));
semaphore_up(&sem);
printf("cpu%d, tid %d up\n", the->cpu->id, the->thread->tid);
}
 
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
 
void test(void)
{
context_t ctx;
__u32 i, k;
printf("Semaphore test #2\n");
waitq_initialize(&can_start);
semaphore_initialize(&sem, 5);
 
for (; ;) {
thread_t *thrd;
k = random(7) + 1;
printf("Creating %d consumers\n", k);
for (i=0; i<k; i++) {
thrd = thread_create(consumer, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
thread_usleep(20000);
waitq_wakeup(&can_start, WAKEUP_ALL);
}
 
}
/SPARTAN/trunk/test/synch/rwlock5/test.c
0,0 → 1,124
/*
* 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 <synch/waitq.h>
#include <synch/rwlock.h>
 
#define READERS 50
#define WRITERS 50
 
static rwlock_t rwlock;
 
static waitq_t can_start;
static int items_read;
static int items_written;
 
static void writer(void *arg);
static void reader(void *arg);
static void failed(void);
 
void writer(void *arg)
{
waitq_sleep(&can_start);
 
rwlock_write_lock(&rwlock);
atomic_inc(&items_written);
rwlock_write_unlock(&rwlock);
}
 
void reader(void *arg)
{
waitq_sleep(&can_start);
rwlock_read_lock(&rwlock);
atomic_inc(&items_read);
rwlock_read_unlock(&rwlock);
}
 
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
 
void test(void)
{
int i, j, k;
int readers, writers;
printf("Read/write locks test #5\n");
waitq_initialize(&can_start);
rwlock_initialize(&rwlock);
for (i=1; i<=3; i++) {
thread_t *thrd;
 
items_read = 0;
items_written = 0;
 
readers = i*READERS;
writers = (4-i)*WRITERS;
 
printf("Creating %d readers and %d writers...", readers, writers);
for (j=0; j<(READERS+WRITERS)/2; j++) {
for (k=0; k<i; k++) {
thrd = thread_create(reader, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
for (k=0; k<(4-i); k++) {
thrd = thread_create(writer, NULL, the->task, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
}
 
printf("ok\n");
 
thread_sleep(1);
waitq_wakeup(&can_start, WAKEUP_ALL);
while (items_read != readers || items_written != writers) {
printf("%d readers remaining, %d writers remaining, readers_in=%d\n", readers - items_read, writers - items_written, rwlock.readers_in);
thread_usleep(100000);
}
}
printf("Test passed.\n");
}