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binding: Add a closure-based variant of bind_property_full()

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Since using the function pointer version muddles the memory management
requirements of language bindings, we should implement a GClosure-based
variant on top of g_object_bind_property_full().

https://bugzilla.gnome.org/show_bug.cgi?id=622278
This commit is contained in:
Emmanuele Bassi
2010-07-13 06:03:03 +01:00
parent ca3b7b75bf
commit 3be3ad61d1
5 changed files with 271 additions and 25 deletions
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76
gobject/tests/binding.c
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@@ -247,8 +247,8 @@ binding_default (void)
target, "bar",
G_BINDING_DEFAULT);
g_assert (g_binding_get_source (binding) == G_OBJECT (source));
g_assert (g_binding_get_target (binding) == G_OBJECT (target));
g_assert ((BindingSource *) g_binding_get_source (binding) == source);
g_assert ((BindingTarget *) g_binding_get_target (binding) == target);
g_assert_cmpstr (g_binding_get_source_property (binding), ==, "foo");
g_assert_cmpstr (g_binding_get_target_property (binding), ==, "bar");
g_assert_cmpint (g_binding_get_flags (binding), ==, G_BINDING_DEFAULT);
@@ -329,6 +329,77 @@ binding_transform (void)
g_assert (unused_data);
}
static void
binding_transform_marshal (GClosure *closure,
GValue *return_value,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint G_GNUC_UNUSED,
gpointer marshal_data)
{
typedef gboolean (* GMarshalFunc_BOOLEAN__VALUE_VALUE) (gpointer data1,
gpointer arg_2,
gpointer arg_3,
gpointer data2);
register GMarshalFunc_BOOLEAN__VALUE_VALUE callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
gboolean v_return;
if (G_CCLOSURE_SWAP_DATA (closure))
{
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
}
else
{
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback = (GMarshalFunc_BOOLEAN__VALUE_VALUE) (marshal_data ? marshal_data : cc->callback);
v_return = callback (data1,
g_value_get_boxed (param_values + 1),
g_value_get_boxed (param_values + 2),
data2);
g_value_set_boolean (return_value, v_return);
}
static void
binding_transform_closure (void)
{
BindingSource *source = g_object_new (binding_source_get_type (), NULL);
BindingTarget *target = g_object_new (binding_target_get_type (), NULL);
GBinding *binding;
gboolean unused_data_1 = FALSE, unused_data_2 = FALSE;
GClosure *c2f_clos, *f2c_clos;
c2f_clos = g_cclosure_new (G_CALLBACK (celsius_to_fahrenheit), &unused_data_1, (GClosureNotify) data_free);
g_closure_set_marshal (c2f_clos, binding_transform_marshal);
f2c_clos = g_cclosure_new (G_CALLBACK (fahrenheit_to_celsius), &unused_data_2, (GClosureNotify) data_free);
g_closure_set_marshal (f2c_clos, binding_transform_marshal);
binding = g_object_bind_property_with_closures (source, "value",
target, "value",
G_BINDING_BIDIRECTIONAL,
c2f_clos,
f2c_clos);
g_object_set (source, "value", 24.0, NULL);
g_assert_cmpfloat (target->value, ==, ((9 * 24.0 / 5) + 32.0));
g_object_set (target, "value", 69.0, NULL);
g_assert_cmpfloat (source->value, ==, (5 * (69.0 - 32.0) / 9));
g_object_unref (source);
g_object_unref (target);
g_assert (unused_data_1);
g_assert (unused_data_2);
}
static void
binding_chain (void)
{
@@ -407,6 +478,7 @@ main (int argc, char *argv[])
g_test_add_func ("/binding/default", binding_default);
g_test_add_func ("/binding/bidirectional", binding_bidirectional);
g_test_add_func ("/binding/transform", binding_transform);
g_test_add_func ("/binding/transform-closure", binding_transform_closure);
g_test_add_func ("/binding/chain", binding_chain);
g_test_add_func ("/binding/sync-create", binding_sync_create);