1 files changed, 27 insertions, 0 deletions

diff --git a/src/haiku_select.cc b/src/haiku_select.cc
index 041e244f3ea..d39000d8bbe 100644
--- a/src/haiku_select.cc
+++ b/src/haiku_select.cc
@@ -29,6 +29,9 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 static BClipboard *primary = NULL;
 static BClipboard *secondary = NULL;
 static BClipboard *system_clipboard = NULL;
+static unsigned long count_clipboard = 0;
+static unsigned long count_primary = 0;
+static unsigned long count_secondary = 0;
 
 int selection_state_flag;
 
@@ -174,6 +177,7 @@ BClipboard_set_system_data (const char *type, const char *data,
     return;
 
   BClipboard_set_data (system_clipboard, type, data, len, clear);
+  count_clipboard = system_clipboard->SystemCount ();
 }
 
 void
@@ -184,6 +188,7 @@ BClipboard_set_primary_selection_data (const char *type, const char *data,
     return;
 
   BClipboard_set_data (primary, type, data, len, clear);
+  count_primary = primary->SystemCount ();
 }
 
 void
@@ -194,6 +199,7 @@ BClipboard_set_secondary_selection_data (const char *type, const char *data,
     return;
 
   BClipboard_set_data (secondary, type, data, len, clear);
+  count_secondary = secondary->SystemCount ();
 }
 
 void
@@ -220,6 +226,27 @@ BClipboard_secondary_targets (char **buf, int len)
   BClipboard_get_targets (secondary, buf, len);
 }
 
+bool
+BClipboard_owns_clipboard (void)
+{
+  return (count_clipboard
+          == system_clipboard->SystemCount ());
+}
+
+bool
+BClipboard_owns_primary (void)
+{
+  return (count_primary
+          == primary->SystemCount ());
+}
+
+bool
+BClipboard_owns_secondary (void)
+{
+  return (count_secondary
+          == secondary->SystemCount ());
+}
+
 void
 init_haiku_select (void)
 {