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8196199: Remove miscellaneous oop comparison operators

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Co-authored-by: Kim Barrett <kim.barrett@oracle.com>
Reviewed-by: hseigel, lfoltan
This commit is contained in:
Coleen Phillimore 2018-02-01 13:30:53 -05:00
parent 2b3d492b43
commit aa51ac19b3
7 changed files with 48 additions and 39 deletions
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17
src/hotspot/share/oops/oop.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -143,6 +143,21 @@ class oopDesc {
inline static bool is_null(oop obj) { return obj == NULL; }
inline static bool is_null(narrowOop obj) { return obj == 0; }
// Standard compare function returns negative value if o1 < o2
// 0 if o1 == o2
// positive value if o1 > o2
inline static int compare(oop o1, oop o2) {
void* o1_addr = (void*)o1;
void* o2_addr = (void*)o2;
if (o1_addr < o2_addr) {
return -1;
} else if (o1_addr > o2_addr) {
return 1;
} else {
return 0;
}
}
// Decode an oop pointer from a narrowOop if compressed.
// These are overloaded for oop and narrowOop as are the other functions
// below so that they can be called in template functions.