Mutex implementation in OBRM

There is a case when parallel requests are triggered in OBRM. The request is supposed to create an object or update it if the object is already present. In case of parallel request for the first time both of them will go for obect creation and one of them fail. (unique index on the object). We plan to overcome this issue by using mutex. Did not find anything related to mutex in the documentation or support site.

Is there any document on how to use mutex in OBRM cm.