Function hipUserObjectRetain 

pub unsafe extern "C" fn hipUserObjectRetain(
    object: hipUserObject_t,
    count: c_uint,
) -> hipError_t

@brief Retain number of references to resource.

@param [in] object - pointer to instace of userobj. @param [in] count - reference to resource to be retained. @returns #hipSuccess, #hipErrorInvalidValue