{ "BOXED", "BOXED", "gpointer", "g_value_take_boxed", },
{ "POINTER", "POINTER", "gpointer", "g_value_set_pointer", },
{ "OBJECT", "OBJECT", "GObject*", "g_value_take_object", },
- { "VARIANT", "VARIANT", "GVariant*", "g_value_set_variant", },
+ { "VARIANT", "VARIANT", "GVariant*", "g_value_take_variant", },
/* deprecated: */
{ "NONE", "VOID", "void", NULL, },
{ "BOOL", "BOOLEAN", "gboolean", "g_value_set_boolean", },
}
/**
+ * g_value_take_variant:
+ * @value: a valid #GValue of %G_TYPE_VARIANT
+ * @variant: a #GVariant, or %NULL
+ *
+ * Set the contents of a variant #GValue to @variant, and takes over
+ * the ownership of the caller's reference to @variant;
+ * the caller doesn't have to unref it any more (i.e. the reference
+ * count of the variant is not increased).
+ *
+ * It is a programmer error to pass a floating variant to this function.
+ * In particular this means that callbacks in closures, and signal handlers
+ * for signals of return type %G_TYPE_VARIANT, must never return floating
+ * variants.
+ *
+ * If you want the #GValue to hold its own reference to @variant, use
+ * g_value_set_variant() instead.
+ *
+ * This is an internal function introduced mainly for C marshallers.
+ *
+ * Since: 2.26
+ */
+void
+g_value_take_variant (GValue *value,
+ GVariant *variant)
+{
+ GVariant *old_variant;
+
+ g_return_if_fail (G_VALUE_HOLDS_VARIANT (value));
+ g_return_if_fail (variant == NULL || !g_variant_is_floating (variant));
+
+ old_variant = value->data[0].v_pointer;
+
+ value->data[0].v_pointer = variant;
+
+ if (old_variant)
+ g_variant_unref (old_variant);
+}
+
+/**
* g_value_get_variant:
* @value: a valid #GValue of %G_TYPE_VARIANT
*
gint param);
gboolean (*test_signal2) (TestObject *tobject,
gint param);
+ GVariant* (*test_signal3) (TestObject *tobject,
+ gboolean *weak_ptr);
};
static GType test_object_get_type (void);
return FALSE;
}
+static gboolean
+test_signal3_accumulator (GSignalInvocationHint *ihint,
+ GValue *return_accu,
+ const GValue *handler_return,
+ gpointer data)
+{
+ GVariant *variant;
+
+ variant = g_value_get_variant (handler_return);
+ g_assert (!g_variant_is_floating (variant));
+
+ g_value_set_variant (return_accu, variant);
+
+ return variant == NULL;
+}
+
+/* To be notified when the variant is finalised, we construct
+ * it from data with a custom GDestroyNotify.
+ */
+
+typedef struct {
+ char *mem;
+ gsize n;
+ gboolean *weak_ptr;
+} VariantData;
+
+static void
+free_data (VariantData *data)
+{
+ *(data->weak_ptr) = TRUE;
+ g_free (data->mem);
+ g_slice_free (VariantData, data);
+}
+
+static GVariant *
+test_object_real_signal3 (TestObject *tobject,
+ gboolean *weak_ptr)
+{
+ GVariant *variant;
+ VariantData *data;
+
+ variant = g_variant_ref_sink (g_variant_new_uint32 (42));
+ data = g_slice_new (VariantData);
+ data->weak_ptr = weak_ptr;
+ data->n = g_variant_get_size (variant);
+ data->mem = g_malloc (data->n);
+ g_variant_store (variant, data->mem);
+ g_variant_unref (variant);
+
+ variant = g_variant_new_from_data (G_VARIANT_TYPE ("u"),
+ data->mem,
+ data->n,
+ TRUE,
+ (GDestroyNotify) free_data,
+ data);
+ return g_variant_ref_sink (variant);
+}
+
static void
test_object_class_init (TestObjectClass *class)
{
class->test_signal1 = test_object_real_signal1;
class->test_signal2 = test_object_real_signal2;
+ class->test_signal3 = test_object_real_signal3;
g_signal_new ("test-signal1",
G_OBJECT_CLASS_TYPE (class),
g_signal_accumulator_true_handled, NULL,
test_marshal_BOOLEAN__INT,
G_TYPE_BOOLEAN, 1, G_TYPE_INT);
+ g_signal_new ("test-signal3",
+ G_OBJECT_CLASS_TYPE (class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (TestObjectClass, test_signal3),
+ test_signal3_accumulator, NULL,
+ test_marshal_VARIANT__POINTER,
+ G_TYPE_VARIANT, 1, G_TYPE_POINTER);
}
static DEFINE_TYPE(TestObject, test_object,
TestObject *object;
gchar *string_result;
gboolean bool_result;
+ gboolean variant_finalised;
+ GVariant *variant_result;
g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
G_LOG_LEVEL_WARNING |
g_signal_emit_by_name (object, "test-signal2", 4, &bool_result);
g_assert (bool_result == FALSE);
+ variant_finalised = FALSE;
+ variant_result = NULL;
+ g_signal_emit_by_name (object, "test-signal3", &variant_finalised, &variant_result);
+ g_assert (variant_result != NULL);
+ g_assert (!g_variant_is_floating (variant_result));
+
+ /* Test that variant_result had refcount 1 */
+ g_assert (!variant_finalised);
+ g_variant_unref (variant_result);
+ g_assert (variant_finalised);
+
return 0;
}