Refactor varobj_update interface.

        * varobj.c (varobj_update): Report changes as vector.  Also
        return not just a list of varobj, but a list of special structures
        that tell what exactly has changed.
        * varobj.h (enum varobj_update_error): Rename to
        varobj_scope_status.
        (struct varobj_update_result_t): New.
        (varobj_update): Adjust prototype.
        * mi/mi-cmd-var.c: Adjust for changes.

1 files changed, 19 insertions, 7 deletions

diff --git a/gdb/varobj.h b/gdb/varobj.h
index 4fc7d1e..9ecef0f 100644
--- a/gdb/varobj.h
+++ b/gdb/varobj.h
@@ -39,12 +39,14 @@ enum varobj_type
     USE_SELECTED_FRAME          /* Always reevaluate in selected frame */
   };
 
-/* Error return values for varobj_update function.  */
-enum varobj_update_error
+/* Enumerator describing if a variable object is in scope.  */
+enum varobj_scope_status
   {
-    NOT_IN_SCOPE = -1,          /* varobj not in scope, can not be updated.  */
-    TYPE_CHANGED = -2,          /* varobj type has changed.  */
-    INVALID = -3,               /* varobj is not valid anymore.  */
+    VAROBJ_IN_SCOPE = 0,        /* Varobj is scope, value available.  */
+    VAROBJ_NOT_IN_SCOPE = 1,    /* Varobj is not in scope, value not available, 
+				   but varobj can become in scope later.  */
+    VAROBJ_INVALID = 2,         /* Varobj no longer has any value, and never
+				   will.  */
   };
 
 /* String representations of gdb's format codes (defined in varobj.c) */
@@ -65,6 +67,16 @@ struct varobj;
 typedef struct varobj *varobj_p;
 DEF_VEC_P (varobj_p);
 
+typedef struct varobj_update_result_t
+{
+  struct varobj *varobj;
+  int type_changed;
+  int changed;
+  enum varobj_scope_status status;
+} varobj_update_result;
+
+DEF_VEC_O (varobj_update_result);
+
 /* API functions */
 
 extern struct varobj *varobj_create (char *objname,
@@ -120,8 +132,8 @@ extern int varobj_set_value (struct varobj *var, char *expression);
 
 extern int varobj_list (struct varobj ***rootlist);
 
-extern int varobj_update (struct varobj **varp, struct varobj ***changelist,
-			  int explicit);
+extern VEC(varobj_update_result) *varobj_update (struct varobj **varp, 
+						 int explicit);
 
 extern void varobj_invalidate (void);