124 lines
5.1 KiB
C++
124 lines
5.1 KiB
C++
// Copyright (c) 2014 Marshall A. Greenblatt. Portions copyright (c) 2012
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// Google Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CEF_INCLUDE_BASE_CEF_MACROS_H_
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#define CEF_INCLUDE_BASE_CEF_MACROS_H_
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#pragma once
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#if defined(BUILDING_CEF_SHARED)
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// When building CEF include the Chromium header directly.
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#include "base/macros.h"
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#else // !BUILDING_CEF_SHARED
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// The following is substantially similar to the Chromium implementation.
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// If the Chromium implementation diverges the below implementation should be
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// updated to match.
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#include <stddef.h> // For size_t.
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#if !defined(ALLOW_THIS_IN_INITIALIZER_LIST)
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#if defined(COMPILER_MSVC)
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// MSVC_PUSH_DISABLE_WARNING pushes |n| onto a stack of warnings to be disabled.
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// The warning remains disabled until popped by MSVC_POP_WARNING.
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#define MSVC_PUSH_DISABLE_WARNING(n) __pragma(warning(push)) \
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__pragma(warning(disable:n))
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// MSVC_PUSH_WARNING_LEVEL pushes |n| as the global warning level. The level
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// remains in effect until popped by MSVC_POP_WARNING(). Use 0 to disable all
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// warnings.
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#define MSVC_PUSH_WARNING_LEVEL(n) __pragma(warning(push, n))
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// Pop effects of innermost MSVC_PUSH_* macro.
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#define MSVC_POP_WARNING() __pragma(warning(pop))
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// Allows |this| to be passed as an argument in constructor initializer lists.
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// This uses push/pop instead of the seemingly simpler suppress feature to avoid
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// having the warning be disabled for more than just |code|.
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//
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// Example usage:
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// Foo::Foo() : x(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(y(this)), z(3) {}
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//
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// Compiler warning C4355: 'this': used in base member initializer list:
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// http://msdn.microsoft.com/en-us/library/3c594ae3(VS.80).aspx
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#define ALLOW_THIS_IN_INITIALIZER_LIST(code) MSVC_PUSH_DISABLE_WARNING(4355) \
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code \
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MSVC_POP_WARNING()
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#else // !COMPILER_MSVC
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#define ALLOW_THIS_IN_INITIALIZER_LIST(code) code
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#endif // !COMPILER_MSVC
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#endif // !ALLOW_THIS_IN_INITIALIZER_LIST
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#if !defined(arraysize)
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// The arraysize(arr) macro returns the # of elements in an array arr.
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// The expression is a compile-time constant, and therefore can be
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// used in defining new arrays, for example. If you use arraysize on
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// a pointer by mistake, you will get a compile-time error.
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//
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// One caveat is that arraysize() doesn't accept any array of an
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// anonymous type or a type defined inside a function. In these rare
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// cases, you have to use the unsafe ARRAYSIZE_UNSAFE() macro below. This is
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// due to a limitation in C++'s template system. The limitation might
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// eventually be removed, but it hasn't happened yet.
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// This template function declaration is used in defining arraysize.
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// Note that the function doesn't need an implementation, as we only
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// use its type.
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template <typename T, size_t N>
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char (&ArraySizeHelper(T (&array)[N]))[N];
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// That gcc wants both of these prototypes seems mysterious. VC, for
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// its part, can't decide which to use (another mystery). Matching of
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// template overloads: the final frontier.
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#ifndef _MSC_VER
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template <typename T, size_t N>
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char (&ArraySizeHelper(const T (&array)[N]))[N];
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#endif
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#define arraysize(array) (sizeof(ArraySizeHelper(array)))
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#endif // !arraysize
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#if !defined(DISALLOW_COPY_AND_ASSIGN)
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// A macro to disallow the copy constructor and operator= functions
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// This should be used in the private: declarations for a class
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#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
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TypeName(const TypeName&); \
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void operator=(const TypeName&)
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#endif // !DISALLOW_COPY_AND_ASSIGN
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#endif // !BUILDING_CEF_SHARED
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#endif // CEF_INCLUDE_BASE_CEF_MACROS_H_
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