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39ea11ce6b
2005-07-15 Matthias Clasen <mclasen@redhat.com> Make refcounting threadsafe by using atomic operations. (#166020, Wim Taymans) * gobject.c: Use a recursive lock to protect the notify queue. (g_object_unref): Get rid of g_object_last_unref and do the last unref handling in g_object_unref. (g_object_ref, g_object_unref): Use atomic operations. * gsignal.c (struct _HandlerMatch): Use a full integer for the ref_count field. (handler_ref, handler_unref_R): Use atomic operations. * gparam.c (g_param_spec_ref, g_param_spec_unref): Use atomic operations instead of a lock to make the refcounting threadsafe. * gclosure.c (g_closure_ref, g_closure_unref): Use atomic operations. This is more complicated here, since the refcount is stored in a bitfield, so we also have to access all other bitfield members atomically. * gsignal.c (handlers_find): Read the meta_marshal flag of the closure atomically. * tests/Makefile.am (SUBDIRS): Add tests/refcount * configure.in: Add tests/refcount * tests/refcount/properties.c: Test property changes from multiple threads. * tests/refcount/signals.c: Test signal emission from multiple threads. * tests/refcount/objects.c: Test refcounting from multiple threads. * tests/refcount/objects2.c: * tests/refcount/properties2.c: Tests to measure the overhead of threadsafe refcounting. * glib/giochannel.c (g_io_channel_ref, g_io_channel_unref): Use atomic operations to make refcounting threadsafe. (#166020, Wim Taymans)
156 lines
3.1 KiB
C
156 lines
3.1 KiB
C
#include <unistd.h>
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#include <glib.h>
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#include <glib-object.h>
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#define G_TYPE_TEST (g_test_get_type ())
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#define G_TEST(test) (G_TYPE_CHECK_INSTANCE_CAST ((test), G_TYPE_TEST, GTest))
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#define G_IS_TEST(test) (G_TYPE_CHECK_INSTANCE_TYPE ((test), G_TYPE_TEST))
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#define G_TEST_CLASS(tclass) (G_TYPE_CHECK_CLASS_CAST ((tclass), G_TYPE_TEST, GTestClass))
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#define G_IS_TEST_CLASS(tclass) (G_TYPE_CHECK_CLASS_TYPE ((tclass), G_TYPE_TEST))
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#define G_TEST_GET_CLASS(test) (G_TYPE_INSTANCE_GET_CLASS ((test), G_TYPE_TEST, GTestClass))
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typedef struct _GTest GTest;
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typedef struct _GTestClass GTestClass;
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struct _GTest
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{
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GObject object;
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};
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struct _GTestClass
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{
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GObjectClass parent_class;
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};
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static GType g_test_get_type (void);
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static gboolean stopping;
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static void g_test_class_init (GTestClass * klass);
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static void g_test_init (GTest * test);
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static void g_test_dispose (GObject * object);
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static GObjectClass *parent_class = NULL;
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static GType
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g_test_get_type (void)
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{
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static GType test_type = 0;
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if (!test_type) {
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static const GTypeInfo test_info = {
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sizeof (GTestClass),
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NULL,
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NULL,
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(GClassInitFunc) g_test_class_init,
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NULL,
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NULL,
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sizeof (GTest),
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0,
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(GInstanceInitFunc) g_test_init,
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NULL
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};
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test_type = g_type_register_static (G_TYPE_OBJECT, "GTest",
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&test_info, 0);
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}
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return test_type;
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}
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static void
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g_test_class_init (GTestClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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parent_class = g_type_class_ref (G_TYPE_OBJECT);
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gobject_class->dispose = g_test_dispose;
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}
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static void
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g_test_init (GTest * test)
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{
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g_print ("init %p\n", test);
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}
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static void
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g_test_dispose (GObject * object)
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{
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GTest *test;
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test = G_TEST (object);
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g_print ("dispose %p!\n", object);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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g_test_do_refcount (GTest * test)
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{
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g_object_ref (test);
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g_object_unref (test);
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}
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static gpointer
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run_thread (GTest * test)
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{
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gint i = 0;
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while (!stopping) {
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g_test_do_refcount (test);
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if ((i++ % 100000) == 0) {
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g_print (".");
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g_usleep (1); /* context switch */
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}
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}
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return NULL;
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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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gint i;
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GTest *test1, *test2;
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GArray *test_threads;
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g_thread_init (NULL);
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g_type_init ();
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test1 = g_object_new (G_TYPE_TEST, NULL);
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test2 = g_object_new (G_TYPE_TEST, NULL);
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test_threads = g_array_new (FALSE, FALSE, sizeof (GThread *));
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stopping = FALSE;
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for (i = 0; i < 20; i++) {
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GThread *thread;
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thread = g_thread_create ((GThreadFunc) run_thread, test1, TRUE, NULL);
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g_array_append_val (test_threads, thread);
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thread = g_thread_create ((GThreadFunc) run_thread, test2, TRUE, NULL);
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g_array_append_val (test_threads, thread);
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}
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sleep (5);
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stopping = TRUE;
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g_print ("\nstopping\n");
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/* join all threads */
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for (i = 0; i < 40; i++) {
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GThread *thread;
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thread = g_array_index (test_threads, GThread *, i);
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g_thread_join (thread);
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}
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g_print ("stopped\n");
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return 0;
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}
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