| // 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_DEPRECATED_MESSAGE (V8_GNUC_PREREQ(4, 5, 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 defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE |
| # define V8_DEPRECATED(message, declarator) \ |
| declarator __attribute__((deprecated(message))) |
| #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED |
| # define V8_DEPRECATED(message, declarator) \ |
| declarator __attribute__((deprecated)) |
| #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_DECLSPEC_DEPRECATED |
| # define V8_DEPRECATED(message, declarator) __declspec(deprecated) declarator |
| #else |
| # define V8_DEPRECATED(message, 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_ |