dd9afc0b56
There's currently a GCC bug which stops this working for return values which have a destructor. Hopefully this will help someone in the future, with future versions of GCC. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38172 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31742 Review URL: http://codereview.chromium.org/11494 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@5871 0039d316-1c4b-4281-b951-d872f2087c98
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
// 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 WARN_UNUSED_RESULT __attribute__((warn_unused_result))
|
|
#else // Not GCC
|
|
#define WARN_UNUSED_RESULT
|
|
#endif
|
|
|
|
#endif // BASE_COMPILER_SPECIFIC_H_
|