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Add a nontrivial read-write lock test

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This commit is contained in:
Matthias Clasen 2011-09-23 22:07:32 -04:00
parent 158a0366be
commit a118313599
1 changed files with 88 additions and 0 deletions
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88
glib/tests/rwlock.c
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@ -187,6 +187,93 @@ test_rwlock7 (void)
g_assert (owners[i] == NULL);
}
static gint even;
static GRWLock even_lock;
GThread *writers[2];
GThread *readers[10];
static void
change_even (gpointer data)
{
g_rw_lock_writer_lock (&even_lock);
g_assert (even % 2 == 0);
even += 1;
if (GPOINTER_TO_INT (data) == 0)
even += 1;
else
even -= 1;
g_assert (even % 2 == 0);
g_rw_lock_writer_unlock (&even_lock);
}
static void
verify_even (gpointer data)
{
g_rw_lock_reader_lock (&even_lock);
g_assert (even % 2 == 0);
g_rw_lock_reader_unlock (&even_lock);
}
static gpointer
writer_func (gpointer data)
{
gint i;
for (i = 0; i < 100000; i++)
change_even (data);
return NULL;
}
static gpointer
reader_func (gpointer data)
{
gint i;
for (i = 0; i < 100000; i++)
verify_even (data);
return NULL;
}
/* This test has 2 writers and 10 readers.
* The writers modify an integer multiple times,
* but always leave it with an even value.
* The readers verify that they can only observe
* even values
*/
static void
test_rwlock8 (void)
{
gint i;
even = 0;
g_rw_lock_init (&even_lock);
for (i = 0; i < 2; i++)
writers[i] = g_thread_create (writer_func, GINT_TO_POINTER (i), TRUE, NULL);
for (i = 0; i < 10; i++)
readers[i] = g_thread_create (reader_func, NULL, TRUE, NULL);
for (i = 0; i < 2; i++)
g_thread_join (writers[i]);
for (i = 0; i < 10; i++)
g_thread_join (readers[i]);
g_assert (even % 2 == 0);
g_rw_lock_clear (&even_lock);
}
int
main (int argc, char *argv[])
{
@ -199,6 +286,7 @@ main (int argc, char *argv[])
g_test_add_func ("/thread/rwlock5", test_rwlock5);
g_test_add_func ("/thread/rwlock6", test_rwlock6);
g_test_add_func ("/thread/rwlock7", test_rwlock7);
g_test_add_func ("/thread/rwlock8", test_rwlock8);
return g_test_run ();
}