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8247869: Change NONCOPYABLE to delete the operations

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Reviewed-by: kbarrett, dholmes
This commit is contained in:
Harold Seigel 2021-03-10 13:14:00 +00:00
parent c0542ed85e
commit fab567666e
1 changed files with 7 additions and 13 deletions
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20
src/hotspot/share/utilities/globalDefinitions.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2021, 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
@ -73,18 +73,12 @@
// This file holds all globally used constants & types, class (forward)
// declarations and a few frequently used utility functions.
// Declare the named class to be noncopyable. This macro must be used in
// a private part of the class's definition, followed by a semi-colon.
// Doing so provides private declarations for the class's copy constructor
// and assignment operator. Because these operations are private, most
// potential callers will fail to compile because they are inaccessible.
// The operations intentionally lack a definition, to provoke link-time
// failures for calls from contexts where they are accessible, e.g. from
// within the class or from a friend of the class.
// Note: The lack of definitions is still not completely bullet-proof, as
// an apparent call might be optimized away by copy elision.
// For C++11 the declarations should be changed to deleted definitions.
#define NONCOPYABLE(C) C(C const&); C& operator=(C const&) /* next token must be ; */
// Declare the named class to be noncopyable. This macro must be followed by
// a semi-colon. The macro provides deleted declarations for the class's copy
// constructor and assignment operator. Because these operations are deleted,
// they cannot be defined and potential callers will fail to compile.
#define NONCOPYABLE(C) C(C const&) = delete; C& operator=(C const&) = delete /* next token must be ; */
//----------------------------------------------------------------------------------------------------
// Printf-style formatters for fixed- and variable-width types as pointers and