| /* |
| * Copyright (c) 2019, 2022, 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 |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_UTILITIES_COMPILERWARNINGS_VISCPP_HPP |
| #define SHARE_UTILITIES_COMPILERWARNINGS_VISCPP_HPP |
| |
| #define PRAGMA_DISABLE_MSVC_WARNING(num) _Pragma(STR(warning(disable : num))) |
| |
| #define PRAGMA_DIAG_PUSH _Pragma("warning(push)") |
| #define PRAGMA_DIAG_POP _Pragma("warning(pop)") |
| |
| // The Visual Studio implementation of FORBID_C_FUNCTION explicitly does |
| // nothing, because there doesn't seem to be a way to implement it for Visual |
| // Studio. What seems the most likely approach is to use deprecation warnings, |
| // but that runs into problems. |
| // |
| // (1) Declaring the function deprecated (using either __declspec(deprecated) |
| // or the C++14 [[deprecated]] attribute) fails with warnings like this: |
| // warning C4273: 'exit': inconsistent dll linkage |
| // It seems attributes are not simply additive with this compiler. |
| // |
| // (2) Additionally adding __declspec(dllimport) to deal with (1) fails with |
| // warnings like this: |
| // error C2375: 'vsnprintf': redefinition; different linkage |
| // It seems some functions in the set of interest have different linkage than |
| // others ("exit" is marked imported while "vsnprintf" is not, for example). |
| // That makes it difficult to provide a generic macro. |
| // |
| // (3) Using __pragma(deprecated(name)) fails with |
| // warning C4995: 'frobnicate': name was marked as #pragma deprecated |
| // for a *declaration* (not a use) of a 'frobnicate' function. |
| // |
| // ALLOW_C_FUNCTIONS disables deprecation warnings over the statement scope. |
| // Some of the functions we're interested in allowing are conditionally |
| // deprecated on Windows, under the control of various preprocessor defines |
| // such as _CRT_SECURE_NO_WARNINGS. Annotating vetted uses allows those |
| // warnings to catch unchecked uses. |
| |
| #define FORBID_C_FUNCTION(signature, alternative) |
| |
| #define ALLOW_C_FUNCTION(name, ...) \ |
| PRAGMA_DIAG_PUSH \ |
| PRAGMA_DISABLE_MSVC_WARNING(4996) \ |
| __VA_ARGS__ \ |
| PRAGMA_DIAG_POP |
| |
| #endif // SHARE_UTILITIES_COMPILERWARNINGS_VISCPP_HPP |
