[glib] Add g_variant_is_floating

[Christian Persch <chpe src gnome org>]

commit 052ef2614af7a8706035982d8211fff64241e83f
Author: Christian Persch <chpe gnome org>
Date:   Sat Jun 19 16:42:11 2010 +0200

    Add g_variant_is_floating

 docs/reference/glib/glib-sections.txt |    1 +
 glib/glib.symbols                     |    1 +
 glib/gvariant-core.c                  |   24 ++++++++++++++++++++++++
 glib/gvariant.h                       |    1 +
 glib/tests/gvariant.c                 |   13 +++++++++++++
 5 files changed, 40 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/glib/glib-sections.txt b/docs/reference/glib/glib-sections.txt
index ec4892d..026fc39 100644
--- a/docs/reference/glib/glib-sections.txt
+++ b/docs/reference/glib/glib-sections.txt
@@ -2808,6 +2808,7 @@ GVariant
 g_variant_unref
 g_variant_ref
 g_variant_ref_sink
+g_variant_is_floating
 g_variant_get_type
 g_variant_get_type_string
 g_variant_is_of_type
diff --git a/glib/glib.symbols b/glib/glib.symbols
index cb1318f..41ef82b 100644
--- a/glib/glib.symbols
+++ b/glib/glib.symbols
@@ -1710,6 +1710,7 @@ g_variant_type_checked_
 g_variant_unref
 g_variant_ref
 g_variant_ref_sink
+g_variant_is_floating
 g_variant_n_children
 g_variant_get_child_value
 g_variant_get_size
diff --git a/glib/gvariant-core.c b/glib/gvariant-core.c
index e3597e4..2b8caa5 100644
--- a/glib/gvariant-core.c
+++ b/glib/gvariant-core.c
@@ -675,6 +675,30 @@ g_variant_ref_sink (GVariant *value)
 }
 
 /**
+ * g_variant_is_floating:
+ * @value: a #GVariant
+ * @returns: whether @value is floating
+ *
+ * Checks whether @value has a floating reference count.
+ *
+ * This function should only ever be used to assert that a given variant
+ * is or is not floating, or for debug purposes. To acquire a reference
+ * to a variant that might be floating, always use g_variant_ref_sink().
+ *
+ * See g_variant_ref_sink() for more information about floating reference
+ * counts.
+ *
+ * Since: 2.26
+ **/
+gboolean
+g_variant_is_floating (GVariant *value)
+{
+  g_return_val_if_fail (value != NULL, FALSE);
+
+  return (value->state & STATE_FLOATING) != 0;
+}
+
+/**
  * g_variant_get_size:
  * @value: a #GVariant instance
  * @returns: the serialised size of @value
diff --git a/glib/gvariant.h b/glib/gvariant.h
index e4a80c0..6647c40 100644
--- a/glib/gvariant.h
+++ b/glib/gvariant.h
@@ -55,6 +55,7 @@ typedef enum
 void                            g_variant_unref                         (GVariant             *value);
 GVariant *                      g_variant_ref                           (GVariant             *value);
 GVariant *                      g_variant_ref_sink                      (GVariant             *value);
+gboolean                        g_variant_is_floating                   (GVariant             *value);
 
 const GVariantType *            g_variant_get_type                      (GVariant             *value);
 const gchar *                   g_variant_get_type_string               (GVariant             *value);
diff --git a/glib/tests/gvariant.c b/glib/tests/gvariant.c
index 68c6ec4..23302f8 100644
--- a/glib/tests/gvariant.c
+++ b/glib/tests/gvariant.c
@@ -3800,6 +3800,18 @@ test_parse_positional (void)
     }
 }
 
+static void
+test_floating (void)
+{
+  GVariant *value;
+
+  value = g_variant_new_int32 (42);
+  g_assert (g_variant_is_floating (value));
+  g_variant_ref_sink (value);
+  g_assert (!g_variant_is_floating (value));
+  g_variant_unref (value);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -3838,6 +3850,7 @@ main (int argc, char **argv)
   g_test_add_func ("/gvariant/parser", test_parses);
   g_test_add_func ("/gvariant/parse-failures", test_parse_failures);
   g_test_add_func ("/gvariant/parse-positional", test_parse_positional);
+  g_test_add_func ("/gvariant/floating", test_floating);
 
   return g_test_run ();
 }