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/* Unit tests for GRWLock
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* Copyright (C) 2011 Red Hat, Inc
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* Author: Matthias Clasen
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*
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* This work is provided "as is"; redistribution and modification
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* in whole or in part, in any medium, physical or electronic is
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* permitted without restriction.
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*
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* This work is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* In no event shall the authors or contributors be liable for any
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* direct, indirect, incidental, special, exemplary, or consequential
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* damages (including, but not limited to, procurement of substitute
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* goods or services; loss of use, data, or profits; or business
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* interruption) however caused and on any theory of liability, whether
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* in contract, strict liability, or tort (including negligence or
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* otherwise) arising in any way out of the use of this software, even
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* if advised of the possibility of such damage.
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*/
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/* We are testing some deprecated APIs here */
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#include <glib.h>
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static void
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test_rwlock1 (void)
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{
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GRWLock lock;
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g_rw_lock_init (&lock);
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g_rw_lock_writer_lock (&lock);
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g_rw_lock_writer_unlock (&lock);
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g_rw_lock_writer_lock (&lock);
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g_rw_lock_writer_unlock (&lock);
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g_rw_lock_clear (&lock);
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}
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static void
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test_rwlock2 (void)
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{
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static GRWLock lock;
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g_rw_lock_writer_lock (&lock);
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g_rw_lock_writer_unlock (&lock);
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g_rw_lock_writer_lock (&lock);
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g_rw_lock_writer_unlock (&lock);
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}
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static void
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test_rwlock3 (void)
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{
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static GRWLock lock;
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gboolean ret;
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ret = g_rw_lock_writer_trylock (&lock);
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g_assert (ret);
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ret = g_rw_lock_writer_trylock (&lock);
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g_assert (!ret);
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g_rw_lock_writer_unlock (&lock);
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}
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static void
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test_rwlock4 (void)
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{
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static GRWLock lock;
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g_rw_lock_reader_lock (&lock);
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g_rw_lock_reader_unlock (&lock);
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g_rw_lock_reader_lock (&lock);
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g_rw_lock_reader_unlock (&lock);
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}
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static void
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test_rwlock5 (void)
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{
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static GRWLock lock;
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gboolean ret;
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ret = g_rw_lock_reader_trylock (&lock);
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g_assert (ret);
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ret = g_rw_lock_reader_trylock (&lock);
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g_assert (ret);
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g_rw_lock_reader_unlock (&lock);
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g_rw_lock_reader_unlock (&lock);
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}
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static void
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test_rwlock6 (void)
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{
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static GRWLock lock;
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gboolean ret;
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g_rw_lock_writer_lock (&lock);
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ret = g_rw_lock_reader_trylock (&lock);
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g_assert (!ret);
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g_rw_lock_writer_unlock (&lock);
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g_rw_lock_reader_lock (&lock);
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ret = g_rw_lock_writer_trylock (&lock);
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g_assert (!ret);
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g_rw_lock_reader_unlock (&lock);
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}
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#define LOCKS 48
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#define ITERATIONS 10000
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#define THREADS 100
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GThread *owners[LOCKS];
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GRWLock locks[LOCKS];
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static void
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acquire (gint nr)
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{
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GThread *self;
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self = g_thread_self ();
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if (!g_rw_lock_writer_trylock (&locks[nr]))
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{
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if (g_test_verbose ())
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g_printerr ("thread %p going to block on lock %d\n", self, nr);
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g_rw_lock_writer_lock (&locks[nr]);
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}
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g_assert (owners[nr] == NULL); /* hopefully nobody else is here */
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owners[nr] = self;
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/* let some other threads try to ruin our day */
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g_thread_yield ();
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g_thread_yield ();
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g_thread_yield ();
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g_assert (owners[nr] == self); /* hopefully this is still us... */
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owners[nr] = NULL; /* make way for the next guy */
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g_rw_lock_writer_unlock (&locks[nr]);
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}
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static gpointer
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thread_func (gpointer data)
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{
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gint i;
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GRand *rand;
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rand = g_rand_new ();
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for (i = 0; i < ITERATIONS; i++)
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acquire (g_rand_int_range (rand, 0, LOCKS));
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g_rand_free (rand);
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return NULL;
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}
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static void
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test_rwlock7 (void)
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{
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gint i;
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GThread *threads[THREADS];
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for (i = 0; i < LOCKS; i++)
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g_rw_lock_init (&locks[i]);
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for (i = 0; i < THREADS; i++)
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threads[i] = g_thread_new ("test", thread_func, NULL);
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for (i = 0; i < THREADS; i++)
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g_thread_join (threads[i]);
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for (i = 0; i < LOCKS; i++)
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g_rw_lock_clear (&locks[i]);
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for (i = 0; i < LOCKS; i++)
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g_assert (owners[i] == NULL);
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}
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static gint even;
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static GRWLock even_lock;
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GThread *writers[2];
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GThread *readers[10];
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static void
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change_even (gpointer data)
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{
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g_rw_lock_writer_lock (&even_lock);
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g_assert (even % 2 == 0);
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even += 1;
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if (GPOINTER_TO_INT (data) == 0)
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even += 1;
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else
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even -= 1;
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g_assert (even % 2 == 0);
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g_rw_lock_writer_unlock (&even_lock);
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}
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static void
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verify_even (gpointer data)
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{
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g_rw_lock_reader_lock (&even_lock);
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g_assert (even % 2 == 0);
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g_rw_lock_reader_unlock (&even_lock);
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}
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static gpointer
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writer_func (gpointer data)
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{
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gint i;
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for (i = 0; i < 100000; i++)
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change_even (data);
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return NULL;
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}
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static gpointer
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reader_func (gpointer data)
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{
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gint i;
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for (i = 0; i < 100000; i++)
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verify_even (data);
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return NULL;
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}
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/* This test has 2 writers and 10 readers.
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* The writers modify an integer multiple times,
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* but always leave it with an even value.
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* The readers verify that they can only observe
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* even values
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*/
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static void
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test_rwlock8 (void)
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{
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gint i;
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even = 0;
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g_rw_lock_init (&even_lock);
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for (i = 0; i < 2; i++)
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writers[i] = g_thread_new ("a", writer_func, GINT_TO_POINTER (i));
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for (i = 0; i < 10; i++)
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readers[i] = g_thread_new ("b", reader_func, NULL);
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for (i = 0; i < 2; i++)
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g_thread_join (writers[i]);
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for (i = 0; i < 10; i++)
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g_thread_join (readers[i]);
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g_assert (even % 2 == 0);
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g_rw_lock_clear (&even_lock);
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}
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int
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main (int argc, char *argv[])
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{
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g_test_init (&argc, &argv, NULL);
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g_test_add_func ("/thread/rwlock1", test_rwlock1);
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g_test_add_func ("/thread/rwlock2", test_rwlock2);
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g_test_add_func ("/thread/rwlock3", test_rwlock3);
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g_test_add_func ("/thread/rwlock4", test_rwlock4);
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g_test_add_func ("/thread/rwlock5", test_rwlock5);
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g_test_add_func ("/thread/rwlock6", test_rwlock6);
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g_test_add_func ("/thread/rwlock7", test_rwlock7);
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g_test_add_func ("/thread/rwlock8", test_rwlock8);
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return g_test_run ();
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}
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