/*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* limitations under the License.
*/
-#ifndef FOLLY_PORTABILITY_H_
-#define FOLLY_PORTABILITY_H_
+#pragma once
#include <string.h>
#include <folly/CPortability.h>
-#ifdef __APPLE__
-# include <malloc/malloc.h>
-#endif
-
#if FOLLY_HAVE_SCHED_H
#include <sched.h>
#endif
# define FOLLY_DEPRECATED(msg)
#endif
-// noreturn
-#if defined(_MSC_VER)
-# define FOLLY_NORETURN __declspec(noreturn)
-#elif defined(__clang__) || defined(__GNUC__)
-# define FOLLY_NORETURN __attribute__((__noreturn__))
-#else
-# define FOLLY_NORETURN
-#endif
-
-// noinline
-#ifdef _MSC_VER
-# define FOLLY_NOINLINE __declspec(noinline)
+// warn unused result
+#if defined(_MSC_VER) && (_MSC_VER >= 1700)
+#define FOLLY_WARN_UNUSED_RESULT _Check_return_
#elif defined(__clang__) || defined(__GNUC__)
-# define FOLLY_NOINLINE __attribute__((__noinline__))
+#define FOLLY_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
#else
-# define FOLLY_NOINLINE
+#define FOLLY_WARN_UNUSED_RESULT
#endif
-// always inline
+// target
#ifdef _MSC_VER
-# define FOLLY_ALWAYS_INLINE __forceinline
-#elif defined(__clang__) || defined(__GNUC__)
-# define FOLLY_ALWAYS_INLINE inline __attribute__((__always_inline__))
+# define FOLLY_TARGET_ATTRIBUTE(target)
#else
-# define FOLLY_ALWAYS_INLINE inline
+# define FOLLY_TARGET_ATTRIBUTE(target) __attribute__((__target__(target)))
#endif
// detection for 64 bit
# define FOLLY_PPC64 0
#endif
+namespace folly {
+constexpr bool kIsArchAmd64 = FOLLY_X64 == 1;
+constexpr bool kIsArchAArch64 = FOLLY_A64 == 1;
+constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
+}
+
// packing is very ugly in msvc
#ifdef _MSC_VER
# define FOLLY_PACK_ATTR /**/
# define FOLLY_MSVC_DISABLE_WARNING(warningNumber)
#endif
-// portable version check
-#ifndef __GNUC_PREREQ
-# if defined __GNUC__ && defined __GNUC_MINOR__
-/* nolint */
-# define __GNUC_PREREQ(maj, min) ((__GNUC__ << 16) + __GNUC_MINOR__ >= \
- ((maj) << 16) + (min))
-# else
-/* nolint */
-# define __GNUC_PREREQ(maj, min) 0
-# endif
+#ifdef HAVE_SHADOW_LOCAL_WARNINGS
+#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS \
+ FOLLY_GCC_DISABLE_WARNING(shadow-compatible-local) \
+ FOLLY_GCC_DISABLE_WARNING(shadow-local)
+#else
+#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS /* empty */
#endif
#if defined(__GNUC__) && !defined(__APPLE__) && !__GNUC_PREREQ(4,9)
#undef FOLLY_TLS
#endif
-// Define to 1 if you have the `preadv' and `pwritev' functions, respectively
-#if !defined(FOLLY_HAVE_PREADV) && !defined(FOLLY_HAVE_PWRITEV)
-# if defined(__GLIBC_PREREQ)
-# if __GLIBC_PREREQ(2, 10)
-# define FOLLY_HAVE_PREADV 1
-# define FOLLY_HAVE_PWRITEV 1
-# endif
-# endif
-#endif
-
// It turns out that GNU libstdc++ and LLVM libc++ differ on how they implement
// the 'std' namespace; the latter uses inline namespaces. Wrap this decision
// up in a macro to make forward-declarations easier.
// If the new c++ ABI is used, __cxx11 inline namespace needs to be added to
// some types, e.g. std::list.
#if _GLIBCXX_USE_CXX11_ABI
-# define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN _GLIBCXX_BEGIN_NAMESPACE_CXX11
+#define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN \
+ inline _GLIBCXX_BEGIN_NAMESPACE_CXX11
# define FOLLY_GLIBCXX_NAMESPACE_CXX11_END _GLIBCXX_END_NAMESPACE_CXX11
#else
# define FOLLY_GLIBCXX_NAMESPACE_CXX11_BEGIN
# define FOLLY_GLIBCXX_NAMESPACE_CXX11_END
#endif
-// Provide our own std::__throw_* wrappers for platforms that don't have them
-#if FOLLY_HAVE_BITS_FUNCTEXCEPT_H
-#include <bits/functexcept.h>
-#else
-#include <folly/detail/FunctionalExcept.h>
-#endif
-
-#if defined(__cplusplus)
-// Unfortunately, boost::has_trivial_copy<T> is broken in libc++ due to its
-// usage of __has_trivial_copy(), so we can't use it as a
-// least-common-denominator for C++11 implementations that don't support
-// std::is_trivially_copyable<T>.
-//
-// http://stackoverflow.com/questions/12754886/has-trivial-copy-behaves-differently-in-clang-and-gcc-whos-right
-//
-// As a result, use std::is_trivially_copyable() where it exists, and fall back
-// to Boost otherwise.
-#if FOLLY_HAVE_STD__IS_TRIVIALLY_COPYABLE
-#include <type_traits>
-#define FOLLY_IS_TRIVIALLY_COPYABLE(T) \
- (std::is_trivially_copyable<T>::value)
-#else
-#include <boost/type_traits.hpp>
-#define FOLLY_IS_TRIVIALLY_COPYABLE(T) \
- (boost::has_trivial_copy<T>::value && \
- boost::has_trivial_destructor<T>::value)
-#endif
-#endif // __cplusplus
-
// MSVC specific defines
// mainly for posix compat
#ifdef _MSC_VER
#include <folly/portability/SysTypes.h>
-// sprintf semantics are not exactly identical
-// but current usage is not a problem
-# define snprintf _snprintf
-
-// semantics here are identical
-# define strerror_r(errno,buf,len) strerror_s(buf,len,errno)
-
// compiler specific to compiler specific
// nolint
# define __PRETTY_FUNCTION__ __FUNCSIG__
// Hide a GCC specific thing that breaks MSVC if left alone.
# define __extension__
-#ifdef _M_IX86_FP
-# define FOLLY_SSE _M_IX86_FP
-# define FOLLY_SSE_MINOR 0
-#endif
+// We have compiler support for the newest of the new, but
+// MSVC doesn't tell us that.
+#define __SSE4_2__ 1
#endif
#include <TargetConditionals.h>
#endif
-// MacOS doesn't have malloc_usable_size()
-#if defined(__APPLE__) && !defined(FOLLY_HAVE_MALLOC_USABLE_SIZE)
-inline size_t malloc_usable_size(void* ptr) {
- return malloc_size(ptr);
-}
-#endif
-
// RTTI may not be enabled for this compilation unit.
#if defined(__GXX_RTTI) || defined(__cpp_rtti) || \
(defined(_MSC_VER) && defined(_CPPRTTI))
# define FOLLY_HAS_RTTI 1
#endif
-#ifdef _MSC_VER
-# include <intrin.h>
+#if defined(__APPLE__) || defined(_MSC_VER)
+#define FOLLY_STATIC_CTOR_PRIORITY_MAX
+#else
+// 101 is the highest priority allowed by the init_priority attribute.
+// This priority is already used by JEMalloc and other memory allocators so
+// we will take the next one.
+#define FOLLY_STATIC_CTOR_PRIORITY_MAX __attribute__((__init_priority__(102)))
#endif
namespace folly {
-inline void asm_volatile_memory() {
-#if defined(__clang__) || defined(__GNUC__)
- asm volatile("" : : : "memory");
-#elif defined(_MSC_VER)
- ::_ReadWriteBarrier();
-#endif
-}
-
-inline void asm_volatile_pause() {
-#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
- ::_mm_pause();
-#elif defined(__i386__) || FOLLY_X64
- asm volatile ("pause");
-#elif FOLLY_A64 || defined(__arm__)
- asm volatile ("yield");
-#elif FOLLY_PPC64
- asm volatile("or 27,27,27");
-#endif
-}
-inline void asm_pause() {
-#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
- ::_mm_pause();
-#elif defined(__i386__) || FOLLY_X64
- asm ("pause");
-#elif FOLLY_A64 || defined(__arm__)
- asm ("yield");
-#elif FOLLY_PPC64
- asm ("or 31,31,31");
+#if defined(__linux__) && !FOLLY_MOBILE
+constexpr auto kIsLinux = true;
+#else
+constexpr auto kIsLinux = false;
#endif
-}
-#if defined(__APPLE__) || defined(_MSC_VER)
-#define MAX_STATIC_CONSTRUCTOR_PRIORITY
+#if defined(_WIN32)
+constexpr auto kIsWindows = true;
#else
-// 101 is the highest priority allowed by the init_priority attribute.
-// This priority is already used by JEMalloc and other memory allocators so
-// we will take the next one.
-#define MAX_STATIC_CONSTRUCTOR_PRIORITY __attribute__ ((__init_priority__(102)))
+constexpr auto kIsWindows = false;
#endif
-
-} // namespace folly
-#endif // FOLLY_PORTABILITY_H_
+}
projects / folly.git / blobdiff