| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_COMPILER_SPECIFIC_H_ |
| #define BASE_COMPILER_SPECIFIC_H_ |
| |
| #include "build/build_config.h" |
| |
| #if defined(COMPILER_MSVC) |
| |
| // Macros for suppressing and disabling warnings on MSVC. |
| // |
| // Warning numbers are enumerated at: |
| // http://msdn.microsoft.com/en-us/library/8x5x43k7(VS.80).aspx |
| // |
| // The warning pragma: |
| // http://msdn.microsoft.com/en-us/library/2c8f766e(VS.80).aspx |
| // |
| // Using __pragma instead of #pragma inside macros: |
| // http://msdn.microsoft.com/en-us/library/d9x1s805.aspx |
| |
| // MSVC_SUPPRESS_WARNING disables warning |n| for the remainder of the line and |
| // for the next line of the source file. |
| #define MSVC_SUPPRESS_WARNING(n) __pragma(warning(suppress:n)) |
| |
| // MSVC_PUSH_DISABLE_WARNING pushes |n| onto a stack of warnings to be disabled. |
| // The warning remains disabled until popped by MSVC_POP_WARNING. |
| #define MSVC_PUSH_DISABLE_WARNING(n) __pragma(warning(push)) \ |
| __pragma(warning(disable:n)) |
| |
| // MSVC_PUSH_WARNING_LEVEL pushes |n| as the global warning level. The level |
| // remains in effect until popped by MSVC_POP_WARNING(). Use 0 to disable all |
| // warnings. |
| #define MSVC_PUSH_WARNING_LEVEL(n) __pragma(warning(push, n)) |
| |
| // Pop effects of innermost MSVC_PUSH_* macro. |
| #define MSVC_POP_WARNING() __pragma(warning(pop)) |
| |
| #define MSVC_DISABLE_OPTIMIZE() __pragma(optimize("", off)) |
| #define MSVC_ENABLE_OPTIMIZE() __pragma(optimize("", on)) |
| |
| // Allows |this| to be passed as an argument in constructor initializer lists. |
| // This uses push/pop instead of the seemingly simpler suppress feature to avoid |
| // having the warning be disabled for more than just |code|. |
| // |
| // Example usage: |
| // Foo::Foo() : x(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(y(this)), z(3) {} |
| // |
| // Compiler warning C4355: 'this': used in base member initializer list: |
| // http://msdn.microsoft.com/en-us/library/3c594ae3(VS.80).aspx |
| #define ALLOW_THIS_IN_INITIALIZER_LIST(code) MSVC_PUSH_DISABLE_WARNING(4355) \ |
| code \ |
| MSVC_POP_WARNING() |
| |
| #else // Not MSVC |
| |
| #define MSVC_SUPPRESS_WARNING(n) |
| #define MSVC_PUSH_DISABLE_WARNING(n) |
| #define MSVC_PUSH_WARNING_LEVEL(n) |
| #define MSVC_POP_WARNING() |
| #define MSVC_DISABLE_OPTIMIZE() |
| #define MSVC_ENABLE_OPTIMIZE() |
| #define ALLOW_THIS_IN_INITIALIZER_LIST(code) code |
| |
| #endif // COMPILER_MSVC |
| |
| |
| #if defined(COMPILER_GCC) |
| #define ALLOW_UNUSED __attribute__((unused)) |
| #define WARN_UNUSED_RESULT __attribute__((warn_unused_result)) |
| #else // Not GCC |
| #define ALLOW_UNUSED |
| #define WARN_UNUSED_RESULT |
| #endif |
| |
| #endif // BASE_COMPILER_SPECIFIC_H_ |