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