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Diffstat (limited to 'chromium/v8/include/v8config.h')
| -rw-r--r-- | chromium/v8/include/v8config.h | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/chromium/v8/include/v8config.h b/chromium/v8/include/v8config.h new file mode 100644 index 00000000000..6fe5c5aabc7 --- /dev/null +++ b/chromium/v8/include/v8config.h @@ -0,0 +1,451 @@ +// Copyright 2013 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef V8CONFIG_H_ +#define V8CONFIG_H_ + +// Platform headers for feature detection below. +#if defined(__ANDROID__) +# include <sys/cdefs.h> +#elif defined(__APPLE__) +# include <TargetConditionals.h> +#elif defined(__linux__) +# include <features.h> +#endif + + +// This macro allows to test for the version of the GNU C library (or +// a compatible C library that masquerades as glibc). It evaluates to +// 0 if libc is not GNU libc or compatible. +// Use like: +// #if V8_GLIBC_PREREQ(2, 3) +// ... +// #endif +#if defined(__GLIBC__) && defined(__GLIBC_MINOR__) +# define V8_GLIBC_PREREQ(major, minor) \ + ((__GLIBC__ * 100 + __GLIBC_MINOR__) >= ((major) * 100 + (minor))) +#else +# define V8_GLIBC_PREREQ(major, minor) 0 +#endif + + +// This macro allows to test for the version of the GNU C++ compiler. +// Note that this also applies to compilers that masquerade as GCC, +// for example clang and the Intel C++ compiler for Linux. +// Use like: +// #if V8_GNUC_PREREQ(4, 3, 1) +// ... +// #endif +#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) +# define V8_GNUC_PREREQ(major, minor, patchlevel) \ + ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= \ + ((major) * 10000 + (minor) * 100 + (patchlevel))) +#elif defined(__GNUC__) && defined(__GNUC_MINOR__) +# define V8_GNUC_PREREQ(major, minor, patchlevel) \ + ((__GNUC__ * 10000 + __GNUC_MINOR__) >= \ + ((major) * 10000 + (minor) * 100 + (patchlevel))) +#else +# define V8_GNUC_PREREQ(major, minor, patchlevel) 0 +#endif + + + +// ----------------------------------------------------------------------------- +// Operating system detection +// +// V8_OS_ANDROID - Android +// V8_OS_BSD - BSDish (Mac OS X, Net/Free/Open/DragonFlyBSD) +// V8_OS_CYGWIN - Cygwin +// V8_OS_DRAGONFLYBSD - DragonFlyBSD +// V8_OS_FREEBSD - FreeBSD +// V8_OS_LINUX - Linux +// V8_OS_MACOSX - Mac OS X +// V8_OS_NACL - Native Client +// V8_OS_NETBSD - NetBSD +// V8_OS_OPENBSD - OpenBSD +// V8_OS_POSIX - POSIX compatible (mostly everything except Windows) +// V8_OS_SOLARIS - Sun Solaris and OpenSolaris +// V8_OS_WIN - Microsoft Windows + +#if defined(__ANDROID__) +# define V8_OS_ANDROID 1 +# define V8_OS_LINUX 1 +# define V8_OS_POSIX 1 +#elif defined(__APPLE__) +# define V8_OS_BSD 1 +# define V8_OS_MACOSX 1 +# define V8_OS_POSIX 1 +#elif defined(__native_client__) +# define V8_OS_NACL 1 +# define V8_OS_POSIX 1 +#elif defined(__CYGWIN__) +# define V8_OS_CYGWIN 1 +# define V8_OS_POSIX 1 +#elif defined(__linux__) +# define V8_OS_LINUX 1 +# define V8_OS_POSIX 1 +#elif defined(__sun) +# define V8_OS_POSIX 1 +# define V8_OS_SOLARIS 1 +#elif defined(__FreeBSD__) +# define V8_OS_BSD 1 +# define V8_OS_FREEBSD 1 +# define V8_OS_POSIX 1 +#elif defined(__DragonFly__) +# define V8_OS_BSD 1 +# define V8_OS_DRAGONFLYBSD 1 +# define V8_OS_POSIX 1 +#elif defined(__NetBSD__) +# define V8_OS_BSD 1 +# define V8_OS_NETBSD 1 +# define V8_OS_POSIX 1 +#elif defined(__OpenBSD__) +# define V8_OS_BSD 1 +# define V8_OS_OPENBSD 1 +# define V8_OS_POSIX 1 +#elif defined(_WIN32) +# define V8_OS_WIN 1 +#endif + + +// ----------------------------------------------------------------------------- +// C library detection +// +// V8_LIBC_BIONIC - Bionic libc +// V8_LIBC_BSD - BSD libc derivate +// V8_LIBC_GLIBC - GNU C library +// V8_LIBC_UCLIBC - uClibc +// +// Note that testing for libc must be done using #if not #ifdef. For example, +// to test for the GNU C library, use: +// #if V8_LIBC_GLIBC +// ... +// #endif + +#if defined(__BIONIC__) +# define V8_LIBC_BIONIC 1 +# define V8_LIBC_BSD 1 +#elif defined(__UCLIBC__) +# define V8_LIBC_UCLIBC 1 +#elif defined(__GLIBC__) || defined(__GNU_LIBRARY__) +# define V8_LIBC_GLIBC 1 +#else +# define V8_LIBC_BSD V8_OS_BSD +#endif + + +// ----------------------------------------------------------------------------- +// Compiler detection +// +// V8_CC_CLANG - Clang +// V8_CC_GNU - GNU C++ +// V8_CC_INTEL - Intel C++ +// V8_CC_MINGW - Minimalist GNU for Windows +// V8_CC_MINGW32 - Minimalist GNU for Windows (mingw32) +// V8_CC_MINGW64 - Minimalist GNU for Windows (mingw-w64) +// V8_CC_MSVC - Microsoft Visual C/C++ +// +// C++11 feature detection +// +// V8_HAS_CXX11_ALIGNAS - alignas specifier supported +// V8_HAS_CXX11_ALIGNOF - alignof(type) operator supported +// V8_HAS_CXX11_STATIC_ASSERT - static_assert() supported +// V8_HAS_CXX11_DELETE - deleted functions supported +// V8_HAS_CXX11_FINAL - final marker supported +// V8_HAS_CXX11_OVERRIDE - override marker supported +// +// Compiler-specific feature detection +// +// V8_HAS___ALIGNOF - __alignof(type) operator supported +// V8_HAS___ALIGNOF__ - __alignof__(type) operator supported +// V8_HAS_ATTRIBUTE_ALIGNED - __attribute__((aligned(n))) supported +// V8_HAS_ATTRIBUTE_ALWAYS_INLINE - __attribute__((always_inline)) +// supported +// V8_HAS_ATTRIBUTE_DEPRECATED - __attribute__((deprecated)) supported +// V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported +// V8_HAS_ATTRIBUTE_VISIBILITY - __attribute__((visibility)) supported +// V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT - __attribute__((warn_unused_result)) +// supported +// V8_HAS_BUILTIN_EXPECT - __builtin_expect() supported +// V8_HAS_DECLSPEC_ALIGN - __declspec(align(n)) supported +// V8_HAS_DECLSPEC_DEPRECATED - __declspec(deprecated) supported +// V8_HAS_DECLSPEC_NOINLINE - __declspec(noinline) supported +// V8_HAS___FINAL - __final supported in non-C++11 mode +// V8_HAS___FORCEINLINE - __forceinline supported +// V8_HAS_SEALED - MSVC style sealed marker supported +// +// Note that testing for compilers and/or features must be done using #if +// not #ifdef. For example, to test for Intel C++ Compiler, use: +// #if V8_CC_INTEL +// ... +// #endif + +#if defined(__clang__) + +# define V8_CC_CLANG 1 + +// Clang defines __alignof__ as alias for __alignof +# define V8_HAS___ALIGNOF 1 +# define V8_HAS___ALIGNOF__ V8_HAS___ALIGNOF + +# define V8_HAS_ATTRIBUTE_ALIGNED (__has_attribute(aligned)) +# define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline)) +# define V8_HAS_ATTRIBUTE_DEPRECATED (__has_attribute(deprecated)) +# define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline)) +# define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility)) +# define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ + (__has_attribute(warn_unused_result)) + +# define V8_HAS_BUILTIN_EXPECT (__has_builtin(__builtin_expect)) + +# define V8_HAS_CXX11_ALIGNAS (__has_feature(cxx_alignas)) +# define V8_HAS_CXX11_STATIC_ASSERT (__has_feature(cxx_static_assert)) +# define V8_HAS_CXX11_DELETE (__has_feature(cxx_deleted_functions)) +# define V8_HAS_CXX11_FINAL (__has_feature(cxx_override_control)) +# define V8_HAS_CXX11_OVERRIDE (__has_feature(cxx_override_control)) + +#elif defined(__GNUC__) + +# define V8_CC_GNU 1 +// Intel C++ also masquerades as GCC 3.2.0 +# define V8_CC_INTEL (defined(__INTEL_COMPILER)) +# define V8_CC_MINGW32 (defined(__MINGW32__)) +# define V8_CC_MINGW64 (defined(__MINGW64__)) +# define V8_CC_MINGW (V8_CC_MINGW32 || V8_CC_MINGW64) + +# define V8_HAS___ALIGNOF__ (V8_GNUC_PREREQ(4, 3, 0)) + +# define V8_HAS_ATTRIBUTE_ALIGNED (V8_GNUC_PREREQ(2, 95, 0)) +// always_inline is available in gcc 4.0 but not very reliable until 4.4. +// Works around "sorry, unimplemented: inlining failed" build errors with +// older compilers. +# define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (V8_GNUC_PREREQ(4, 4, 0)) +# define V8_HAS_ATTRIBUTE_DEPRECATED (V8_GNUC_PREREQ(3, 4, 0)) +# define V8_HAS_ATTRIBUTE_NOINLINE (V8_GNUC_PREREQ(3, 4, 0)) +# define V8_HAS_ATTRIBUTE_VISIBILITY (V8_GNUC_PREREQ(4, 3, 0)) +# define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ + (!V8_CC_INTEL && V8_GNUC_PREREQ(4, 1, 0)) + +# define V8_HAS_BUILTIN_EXPECT (V8_GNUC_PREREQ(2, 96, 0)) + +// g++ requires -std=c++0x or -std=gnu++0x to support C++11 functionality +// without warnings (functionality used by the macros below). These modes +// are detectable by checking whether __GXX_EXPERIMENTAL_CXX0X__ is defined or, +// more standardly, by checking whether __cplusplus has a C++11 or greater +// value. Current versions of g++ do not correctly set __cplusplus, so we check +// both for forward compatibility. +# if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L +# define V8_HAS_CXX11_ALIGNAS (V8_GNUC_PREREQ(4, 8, 0)) +# define V8_HAS_CXX11_ALIGNOF (V8_GNUC_PREREQ(4, 8, 0)) +# define V8_HAS_CXX11_STATIC_ASSERT (V8_GNUC_PREREQ(4, 3, 0)) +# define V8_HAS_CXX11_DELETE (V8_GNUC_PREREQ(4, 4, 0)) +# define V8_HAS_CXX11_OVERRIDE (V8_GNUC_PREREQ(4, 7, 0)) +# define V8_HAS_CXX11_FINAL (V8_GNUC_PREREQ(4, 7, 0)) +# else +// '__final' is a non-C++11 GCC synonym for 'final', per GCC r176655. +# define V8_HAS___FINAL (V8_GNUC_PREREQ(4, 7, 0)) +# endif + +#elif defined(_MSC_VER) + +# define V8_CC_MSVC 1 + +# define V8_HAS___ALIGNOF 1 + +// Override control was added with Visual Studio 2005, but +// Visual Studio 2010 and earlier spell "final" as "sealed". +# define V8_HAS_CXX11_FINAL (_MSC_VER >= 1700) +# define V8_HAS_CXX11_OVERRIDE (_MSC_VER >= 1400) +# define V8_HAS_SEALED (_MSC_VER >= 1400) + +# define V8_HAS_DECLSPEC_ALIGN 1 +# define V8_HAS_DECLSPEC_DEPRECATED (_MSC_VER >= 1300) +# define V8_HAS_DECLSPEC_NOINLINE 1 + +# define V8_HAS___FORCEINLINE 1 + +#endif + + +// ----------------------------------------------------------------------------- +// Helper macros + +// A macro used to make better inlining. Don't bother for debug builds. +// Use like: +// V8_INLINE int GetZero() { return 0; } +#if !defined(DEBUG) && V8_HAS_ATTRIBUTE_ALWAYS_INLINE +# define V8_INLINE inline __attribute__((always_inline)) +#elif !defined(DEBUG) && V8_HAS___FORCEINLINE +# define V8_INLINE __forceinline +#else +# define V8_INLINE inline +#endif + + +// A macro used to tell the compiler to never inline a particular function. +// Don't bother for debug builds. +// Use like: +// V8_NOINLINE int GetMinusOne() { return -1; } +#if !defined(DEBUG) && V8_HAS_ATTRIBUTE_NOINLINE +# define V8_NOINLINE __attribute__((noinline)) +#elif !defined(DEBUG) && V8_HAS_DECLSPEC_NOINLINE +# define V8_NOINLINE __declspec(noinline) +#else +# define V8_NOINLINE /* NOT SUPPORTED */ +#endif + + +// A macro to mark classes or functions as deprecated. +#if !V8_DISABLE_DEPRECATIONS && V8_HAS_ATTRIBUTE_DEPRECATED +# define V8_DEPRECATED(declarator) declarator __attribute__((deprecated)) +#elif !V8_DISABLE_DEPRECATIONS && V8_HAS_DECLSPEC_DEPRECATED +# define V8_DEPRECATED(declarator) __declspec(deprecated) declarator +#else +# define V8_DEPRECATED(declarator) declarator +#endif + + +// Annotate a function indicating the caller must examine the return value. +// Use like: +// int foo() V8_WARN_UNUSED_RESULT; +#if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT +# define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) +#else +# define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */ +#endif + + +// A macro to provide the compiler with branch prediction information. +#if V8_HAS_BUILTIN_EXPECT +# define V8_UNLIKELY(condition) (__builtin_expect(!!(condition), 0)) +# define V8_LIKELY(condition) (__builtin_expect(!!(condition), 1)) +#else +# define V8_UNLIKELY(condition) (condition) +# define V8_LIKELY(condition) (condition) +#endif + + +// A macro to specify that a method is deleted from the corresponding class. +// Any attempt to use the method will always produce an error at compile time +// when this macro can be implemented (i.e. if the compiler supports C++11). +// If the current compiler does not support C++11, use of the annotated method +// will still cause an error, but the error will most likely occur at link time +// rather than at compile time. As a backstop, method declarations using this +// macro should be private. +// Use like: +// class A { +// private: +// A(const A& other) V8_DELETE; +// A& operator=(const A& other) V8_DELETE; +// }; +#if V8_HAS_CXX11_DELETE +# define V8_DELETE = delete +#else +# define V8_DELETE /* NOT SUPPORTED */ +#endif + + +// Annotate a virtual method indicating it must be overriding a virtual +// method in the parent class. +// Use like: +// virtual void bar() V8_OVERRIDE; +#if V8_HAS_CXX11_OVERRIDE +# define V8_OVERRIDE override +#else +# define V8_OVERRIDE /* NOT SUPPORTED */ +#endif + + +// Annotate a virtual method indicating that subclasses must not override it, +// or annotate a class to indicate that it cannot be subclassed. +// Use like: +// class B V8_FINAL : public A {}; +// virtual void bar() V8_FINAL; +#if V8_HAS_CXX11_FINAL +# define V8_FINAL final +#elif V8_HAS___FINAL +# define V8_FINAL __final +#elif V8_HAS_SEALED +# define V8_FINAL sealed +#else +# define V8_FINAL /* NOT SUPPORTED */ +#endif + + +// This macro allows to specify memory alignment for structs, classes, etc. +// Use like: +// class V8_ALIGNED(16) MyClass { ... }; +// V8_ALIGNED(32) int array[42]; +#if V8_HAS_CXX11_ALIGNAS +# define V8_ALIGNED(n) alignas(n) +#elif V8_HAS_ATTRIBUTE_ALIGNED +# define V8_ALIGNED(n) __attribute__((aligned(n))) +#elif V8_HAS_DECLSPEC_ALIGN +# define V8_ALIGNED(n) __declspec(align(n)) +#else +# define V8_ALIGNED(n) /* NOT SUPPORTED */ +#endif + + +// This macro is similar to V8_ALIGNED(), but takes a type instead of size +// in bytes. If the compiler does not supports using the alignment of the +// |type|, it will align according to the |alignment| instead. For example, +// Visual Studio C++ cannot combine __declspec(align) and __alignof. The +// |alignment| must be a literal that is used as a kind of worst-case fallback +// alignment. +// Use like: +// struct V8_ALIGNAS(AnotherClass, 16) NewClass { ... }; +// V8_ALIGNAS(double, 8) int array[100]; +#if V8_HAS_CXX11_ALIGNAS +# define V8_ALIGNAS(type, alignment) alignas(type) +#elif V8_HAS___ALIGNOF__ && V8_HAS_ATTRIBUTE_ALIGNED +# define V8_ALIGNAS(type, alignment) __attribute__((aligned(__alignof__(type)))) +#else +# define V8_ALIGNAS(type, alignment) V8_ALIGNED(alignment) +#endif + + +// This macro returns alignment in bytes (an integer power of two) required for +// any instance of the given type, which is either complete type, an array type, +// or a reference type. +// Use like: +// size_t alignment = V8_ALIGNOF(double); +#if V8_HAS_CXX11_ALIGNOF +# define V8_ALIGNOF(type) alignof(type) +#elif V8_HAS___ALIGNOF +# define V8_ALIGNOF(type) __alignof(type) +#elif V8_HAS___ALIGNOF__ +# define V8_ALIGNOF(type) __alignof__(type) +#else +// Note that alignment of a type within a struct can be less than the +// alignment of the type stand-alone (because of ancient ABIs), so this +// should only be used as a last resort. +namespace v8 { template <typename T> class AlignOfHelper { char c; T t; }; } +# define V8_ALIGNOF(type) (sizeof(::v8::AlignOfHelper<type>) - sizeof(type)) +#endif + +#endif // V8CONFIG_H_ |