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-rw-r--r--runtime/obj.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/runtime/obj.h b/runtime/obj.h
index be97f20e..32f7ef09 100644
--- a/runtime/obj.h
+++ b/runtime/obj.h
@@ -122,4 +122,8 @@ rsRetVal objGetObjInterface(obj_if_t *pIf);
PROTOTYPEObjClassInit(obj);
PROTOTYPEObjClassExit(obj);
+
+/* the following definition is only for "friends" */
+extern pthread_mutex_t mutObjGlobalOp; /* mutex to guard global operations of the object system */
+
#endif /* #ifndef OBJ_H_INCLUDED */