| // 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_ |
| |
| // ----------------------------------------------------------------------------- |
| // 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 |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Compiler detection |
| // |
| // V8_CC_CLANG - Clang |
| // V8_CC_GNU - GNU C++ |
| // V8_CC_MINGW - Minimalist GNU for Windows |
| // V8_CC_MSVC - Microsoft Visual C/C++ |
| // |
| // C++11 feature detection |
| // |
| // V8_HAS_CXX11_ALIGNAS - alignas specifier 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_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_VISIBILITY - __attribute__((visibility)) 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___FINAL - __final supported in non-C++11 mode |
| // V8_HAS___FORCEINLINE - __forceinline supported |
| // V8_HAS_SEALED - MSVC style sealed marker supported |
| |
| #if defined(__clang__) |
| |
| // Don't treat clang as GCC. |
| # define V8_GNUC_PREREQ(major, minor, patchlevel) 0 |
| |
| # define V8_CC_CLANG 1 |
| |
| # 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_VISIBILITY (__has_attribute(visibility)) |
| |
| # 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_GNUC_PREREQ(major, minor, patchlevel) \ |
| ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= \ |
| ((major) * 10000 + (minor) * 100 + (patchlevel))) |
| |
| # define V8_CC_GNU 1 |
| # if defined(__MINGW32__) |
| # define V8_CC_MINGW 1 |
| # endif |
| |
| # define V8_HAS_ATTRIBUTE___ALIGNED__ (V8_GNUC_PREREQ(2, 95, 0)) |
| # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (V8_GNUC_PREREQ(4, 0, 0)) |
| # define V8_HAS_ATTRIBUTE_DEPRECATED (V8_GNUC_PREREQ(3, 4, 0)) |
| # define V8_HAS_ATTRIBUTE_VISIBILITY (V8_GNUC_PREREQ(4, 3, 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_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_GNUC_PREREQ(major, minor, patchlevel) 0 |
| |
| # define V8_CC_MSVC 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___FORCEINLINE 1 |
| |
| #endif |
| |
| |
| // ----------------------------------------------------------------------------- |
| // Helper macros |
| |
| // A macro used to make better inlining. Don't bother for debug builds. |
| #if !defined(DEBUG) && V8_HAS_ATTRIBUTE_ALWAYS_INLINE |
| # define V8_INLINE(declarator) inline __attribute__((always_inline)) declarator |
| #elif !defined(DEBUG) && V8_HAS___FORCEINLINE |
| # define V8_INLINE(declarator) __forceinline declarator |
| #else |
| # define V8_INLINE(declarator) inline declarator |
| #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 |
| |
| |
| // 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_ALIGNAS(16) MyClass { ... }; |
| // V8_ALIGNAS(32) int array[42]; |
| #if V8_HAS_CXX11_ALIGNAS |
| # define V8_ALIGNAS(n) alignas(n) |
| #elif V8_HAS_ATTRIBUTE___ALIGNED__ |
| # define V8_ALIGNAS(n) __attribute__((__aligned__(n))) |
| #elif V8_HAS_DECLSPEC_ALIGN |
| # define V8_ALIGNAS(n) __declspec(align(n)) |
| #else |
| # define V8_ALIGNAS(n) /* NOT SUPPORTED */ |
| #endif |
| |
| #endif // V8CONFIG_H_ |
