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/*
* 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>
#include <synch/spinlock.h>
static semaphore_t sem;
SPINLOCK_INITIALIZE(lock);
static waitq_t can_start;
__u32 seed = 0xdeadbeef;
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", CPU->id, THREAD->tid, to);
rc = semaphore_down_timeout(&sem, to);
if (SYNCH_FAILED(rc)) {
printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);
return;
}
printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid);
thread_usleep(random(30000));
semaphore_up(&sem);
printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);
}
void failed(void)
{
printf("Test failed prematurely.\n");
thread_exit();
}
void test(void)
{
__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, TASK, 0);
if (thrd)
thread_ready(thrd);
else
failed();
}
thread_usleep(20000);
waitq_wakeup(&can_start, WAKEUP_ALL);
}
}