diff options
| -rw-r--r-- | docs/reference/gobject/gobject-sections.txt | 2 | ||||
| -rw-r--r-- | gobject/gbinding.c | 54 | ||||
| -rw-r--r-- | gobject/gbinding.h | 4 |
3 files changed, 60 insertions, 0 deletions
diff --git a/docs/reference/gobject/gobject-sections.txt b/docs/reference/gobject/gobject-sections.txt index 36552b1b3..54fbccaf8 100644 --- a/docs/reference/gobject/gobject-sections.txt +++ b/docs/reference/gobject/gobject-sections.txt @@ -978,8 +978,10 @@ g_io_condition_get_type GBinding GBindingFlags g_binding_get_source +g_binding_dup_source g_binding_get_source_property g_binding_get_target +g_binding_dup_target g_binding_get_target_property g_binding_get_flags g_binding_unbind diff --git a/gobject/gbinding.c b/gobject/gbinding.c index 1448adb36..8451dc48e 100644 --- a/gobject/gbinding.c +++ b/gobject/gbinding.c @@ -793,6 +793,10 @@ g_binding_get_flags (GBinding *binding) * strong reference to the source. If the source is destroyed before the * binding then this function will return %NULL. * + * Use g_binding_dup_source() if the source or binding are used from different + * threads as otherwise the pointer returned from this function might become + * invalid if the source is finalized from another thread in the meantime. + * * Returns: (transfer none) (nullable): the source #GObject, or %NULL if the * source does not exist any more. * @@ -815,6 +819,29 @@ g_binding_get_source (GBinding *binding) } /** + * g_binding_dup_source: + * @binding: a #GBinding + * + * Retrieves the #GObject instance used as the source of the binding. + * + * A #GBinding can outlive the source #GObject as the binding does not hold a + * strong reference to the source. If the source is destroyed before the + * binding then this function will return %NULL. + * + * Returns: (transfer full) (nullable): the source #GObject, or %NULL if the + * source does not exist any more. + * + * Since: 2.68 + */ +GObject * +g_binding_dup_source (GBinding *binding) +{ + g_return_val_if_fail (G_IS_BINDING (binding), NULL); + + return g_weak_ref_get (&binding->source); +} + +/** * g_binding_get_target: * @binding: a #GBinding * @@ -824,6 +851,10 @@ g_binding_get_source (GBinding *binding) * strong reference to the target. If the target is destroyed before the * binding then this function will return %NULL. * + * Use g_binding_dup_target() if the target or binding are used from different + * threads as otherwise the pointer returned from this function might become + * invalid if the target is finalized from another thread in the meantime. + * * Returns: (transfer none) (nullable): the target #GObject, or %NULL if the * target does not exist any more. * @@ -846,6 +877,29 @@ g_binding_get_target (GBinding *binding) } /** + * g_binding_dup_target: + * @binding: a #GBinding + * + * Retrieves the #GObject instance used as the target of the binding. + * + * A #GBinding can outlive the target #GObject as the binding does not hold a + * strong reference to the target. If the target is destroyed before the + * binding then this function will return %NULL. + * + * Returns: (transfer full) (nullable): the target #GObject, or %NULL if the + * target does not exist any more. + * + * Since: 2.68 + */ +GObject * +g_binding_dup_target (GBinding *binding) +{ + g_return_val_if_fail (G_IS_BINDING (binding), NULL); + + return g_weak_ref_get (&binding->target); +} + +/** * g_binding_get_source_property: * @binding: a #GBinding * diff --git a/gobject/gbinding.h b/gobject/gbinding.h index b4eb233b3..f269ad5a8 100644 --- a/gobject/gbinding.h +++ b/gobject/gbinding.h @@ -110,8 +110,12 @@ GLIB_AVAILABLE_IN_ALL GBindingFlags g_binding_get_flags (GBinding *binding); GLIB_AVAILABLE_IN_ALL GObject * g_binding_get_source (GBinding *binding); +GLIB_AVAILABLE_IN_2_68 +GObject * g_binding_dup_source (GBinding *binding); GLIB_AVAILABLE_IN_ALL GObject * g_binding_get_target (GBinding *binding); +GLIB_AVAILABLE_IN_2_68 +GObject * g_binding_dup_target (GBinding *binding); GLIB_AVAILABLE_IN_ALL const gchar * g_binding_get_source_property (GBinding *binding); GLIB_AVAILABLE_IN_ALL |