[Ada] Add ada-tasks.c:iterate_over_live_ada_tasks

This new function is needed by the ravenscar-thread layer.

gdb/ChangeLog:

        * ada-tasks.c (iterate_over_live_ada_tasks): New function.
        * ada-lang.h (iterate_over_live_ada_tasks): Declare.

1 files changed, 4 insertions, 0 deletions

diff --git a/gdb/ada-lang.h b/gdb/ada-lang.h
index d1e8ca50c5..935c2e146f 100644
--- a/gdb/ada-lang.h
+++ b/gdb/ada-lang.h
@@ -378,6 +378,10 @@ extern int valid_task_id (int);
 
 extern int ada_get_task_number (ptid_t);
 
+typedef void (ada_task_list_iterator_ftype) (struct ada_task_info *task);
+extern void iterate_over_live_ada_tasks
+  (ada_task_list_iterator_ftype *iterator);
+
 extern int ada_build_task_list (int warn_if_null);
 
 extern int ada_exception_catchpoint_p (struct breakpoint *b);