hg: jdk/submit: 8244733: Add ResourceHashtable::compute_if_absent

[thomas.stuefe at gmail.com]

Changeset: cc9b2a1bc642
Author:    stuefe
Date:      2020-05-11 17:23 +0200
URL:       https://hg.openjdk.java.net/jdk/submit/rev/cc9b2a1bc642

8244733: Add ResourceHashtable::compute_if_absent

! src/hotspot/share/classfile/classLoaderStats.cpp
! src/hotspot/share/utilities/resourceHash.hpp
! test/hotspot/gtest/utilities/test_resourceHash.cpp