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/*
* Copyright (c) 2011 Mark Heily <mark@heily.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <pthread.h>
#include "src/common/private.h"
int DEBUG_KQUEUE = 1;
char * KQUEUE_DEBUG_IDENT = "lockstat";
struct foo {
tracing_mutex_t foo_lock;
};
void *test_assert_unlocked(void *_x)
{
struct foo *x = (struct foo *) _x;
tracing_mutex_assert(&x->foo_lock, MTX_UNLOCKED);
pthread_exit(NULL);
}
void *test_assert_locked(void *_x)
{
struct foo *x = (struct foo *) _x;
puts("The following assertion should fail");
tracing_mutex_assert(&x->foo_lock, MTX_LOCKED);
pthread_exit(NULL);
}
/*
* Test the lockstat.h API
*/
int main() {
struct foo x;
pthread_t tid;
void *rv;
tracing_mutex_init(&x.foo_lock, NULL);
tracing_mutex_lock(&x.foo_lock);
tracing_mutex_assert(&x.foo_lock, MTX_LOCKED);
tracing_mutex_unlock(&x.foo_lock);
tracing_mutex_assert(&x.foo_lock, MTX_UNLOCKED);
/*
* Ensure that the assert() function works when there
* are multiple threads contenting for the mutex.
*/
tracing_mutex_lock(&x.foo_lock);
if (pthread_create(&tid, NULL, test_assert_unlocked, &x) != 0)
err(1, "pthread_create");
pthread_join(tid, &rv);
tracing_mutex_unlock(&x.foo_lock);
tracing_mutex_lock(&x.foo_lock);
if (pthread_create(&tid, NULL, test_assert_locked, &x) != 0)
err(1, "pthread_create");
sleep(3); // Crude way to ensure the other thread is scheduled
pthread_join(tid, &rv);
tracing_mutex_unlock(&x.foo_lock);
puts("+OK");
return (0);
}
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