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> |
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static semaphore_t sem; |
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static spinlock_t lock; |
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static waitq_t can_start; |
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__u32 seed = 0xdeadbeef; |
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static __u32 random(__u32 max); |
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static void consumer(void *arg); |
static void failed(void); |
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__u32 random(__u32 max) |
{ |
__u32 rc; |
|
spinlock_lock(&lock); |
rc = seed % max; |
seed = (((seed<<2) ^ (seed>>2)) * 487) + rc; |
spinlock_unlock(&lock); |
return rc; |
} |
|
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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; |
} |
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printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid); |
thread_usleep(random(30000)); |
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semaphore_up(&sem); |
printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid); |
} |
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void failed(void) |
{ |
printf("Test failed prematurely.\n"); |
thread_exit(); |
} |
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void test(void) |
{ |
context_t ctx; |
__u32 i, k; |
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printf("Semaphore test #2\n"); |
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waitq_initialize(&can_start); |
semaphore_initialize(&sem, 5); |
|
|
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for (; ;) { |
thread_t *thrd; |
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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(); |
} |
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thread_usleep(20000); |
waitq_wakeup(&can_start, WAKEUP_ALL); |
} |
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} |