X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=folly%2FPortability.h;h=a9c3679313f38c892380ac1a923a18776d1672e5;hb=0c1113b9d64f7c805f1030f28329198fa2dd926d;hp=47d33be4a5a690babb58f82c1b3dbcee2535a89c;hpb=baab37435b9b210d9f2068e8a85e7a23d6a518f5;p=folly.git

diff --git a/folly/Portability.h b/folly/Portability.h
index 47d33be4..a9c36793 100644
--- a/folly/Portability.h
+++ b/folly/Portability.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2015 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,13 +18,22 @@
 #define FOLLY_PORTABILITY_H_
 
 #ifndef FOLLY_NO_CONFIG
-#include "folly-config.h"
+#include <folly/folly-config.h>
+#endif
+
+#ifdef FOLLY_PLATFORM_CONFIG
+#include FOLLY_PLATFORM_CONFIG
 #endif
 
 #if FOLLY_HAVE_FEATURES_H
 #include <features.h>
 #endif
 
+#include <folly/CPortability.h>
+
+#ifdef __APPLE__
+# include <malloc/malloc.h>
+#endif
 
 #if FOLLY_HAVE_SCHED_H
  #include <sched.h>
@@ -33,29 +42,113 @@
  #endif
 #endif
 
+// A change in folly/MemoryMapping.cpp uses MAP_ANONYMOUS, which is named
+// MAP_ANON on OSX/BSD.
+#if defined(__APPLE__) || defined(__FreeBSD__)
+  #include <sys/mman.h>
+  #ifndef MAP_ANONYMOUS
+    #ifdef MAP_ANON
+      #define MAP_ANONYMOUS MAP_ANON
+    #endif
+  #endif
+#endif
 
 // MaxAlign: max_align_t isn't supported by gcc
 #ifdef __GNUC__
-struct MaxAlign { char c; } __attribute__((aligned));
+struct MaxAlign { char c; } __attribute__((__aligned__));
 #else /* !__GNUC__ */
 # error Cannot define MaxAlign on this platform
 #endif
 
+// compiler specific attribute translation
+// msvc should come first, so if clang is in msvc mode it gets the right defines
 
-// noreturn
+// NOTE: this will only do checking in msvc with versions that support /analyze
+#if _MSC_VER
+# ifdef _USE_ATTRIBUTES_FOR_SAL
+#    undef _USE_ATTRIBUTES_FOR_SAL
+# endif
+/* nolint */
+# define _USE_ATTRIBUTES_FOR_SAL 1
+# include <sal.h>
+# define FOLLY_PRINTF_FORMAT _Printf_format_string_
+# define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) /**/
+#else
+# define FOLLY_PRINTF_FORMAT /**/
+# define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) \
+  __attribute__((__format__(__printf__, format_param, dots_param)))
+#endif
+
+// deprecated
 #if defined(__clang__) || defined(__GNUC__)
-# define FOLLY_NORETURN __attribute__((noreturn))
+# define FOLLY_DEPRECATED(msg) __attribute__((__deprecated__(msg)))
+#else
+# define FOLLY_DEPRECATED
+#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)
+#elif defined(__clang__) || defined(__GNUC__)
+# define FOLLY_NOINLINE __attribute__((__noinline__))
+#else
+# define FOLLY_NOINLINE
+#endif
+
+// always inline
+#ifdef _MSC_VER
+# define FOLLY_ALWAYS_INLINE __forceinline
+#elif defined(__clang__) || defined(__GNUC__)
+# define FOLLY_ALWAYS_INLINE inline __attribute__((__always_inline__))
+#else
+# define FOLLY_ALWAYS_INLINE
+#endif
+
+// detection for 64 bit
+#if defined(__x86_64__) || defined(_M_X64)
+# define FOLLY_X64 1
+#else
+# define FOLLY_X64 0
+#endif
+
+#if defined(__aarch64__)
+# define FOLLY_A64 1
+#else
+# define FOLLY_A64 0
+#endif
+
+// packing is very ugly in msvc
+#ifdef _MSC_VER
+# define FOLLY_PACK_ATTR /**/
+# define FOLLY_PACK_PUSH __pragma(pack(push, 1))
+# define FOLLY_PACK_POP __pragma(pack(pop))
+#elif defined(__clang__) || defined(__GNUC__)
+# define FOLLY_PACK_ATTR __attribute__((__packed__))
+# define FOLLY_PACK_PUSH /**/
+# define FOLLY_PACK_POP /**/
+#else
+# define FOLLY_PACK_ATTR /**/
+# define FOLLY_PACK_PUSH /**/
+# define FOLLY_PACK_POP /**/
+#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
 #endif
@@ -67,12 +160,28 @@ struct MaxAlign { char c; } __attribute__((aligned));
 # if defined(__clang__) || __GNUC_PREREQ(4, 7)
 #  define FOLLY_FINAL final
 #  define FOLLY_OVERRIDE override
+# elif defined(_MSC_VER) && _MSC_VER >= 1600
+#  define FOLLY_FINAL final
+#  define FOLLY_OVERRIDE override
 # else
 #  define FOLLY_FINAL /**/
 #  define FOLLY_OVERRIDE /**/
 # endif
 #endif
 
+/* Platform specific TLS support
+ * gcc implements __thread
+ * msvc implements __declspec(thread)
+ * the semantics are the same
+ * (but remember __thread has different semantics when using emutls (ex. apple))
+ */
+#if defined(_MSC_VER)
+# define FOLLY_TLS __declspec(thread)
+#elif defined(__GNUC__) || defined(__clang__)
+# define FOLLY_TLS __thread
+#else
+# error cannot define platform specific thread local storage
+#endif
 
 // Define to 1 if you have the `preadv' and `pwritev' functions, respectively
 #if !defined(FOLLY_HAVE_PREADV) && !defined(FOLLY_HAVE_PWRITEV)
@@ -84,44 +193,11 @@ struct MaxAlign { char c; } __attribute__((aligned));
 # endif
 #endif
 
-
-/* Define a convenience macro to test when address sanitizer is being used
- * across the different compilers (e.g. clang, gcc) */
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define FOLLY_SANITIZE_ADDRESS 1
-# endif
-#elif defined (__GNUC__) && \
-      (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 8)) || (__GNUC__ >= 5)) && \
-      __SANITIZE_ADDRESS__
-# define FOLLY_SANITIZE_ADDRESS 1
-#endif
-
-/* Define attribute wrapper for function attribute used to disable
- * address sanitizer instrumentation. Unfortunately, this attribute
- * has issues when inlining is used, so disable that as well. */
-#ifdef FOLLY_SANITIZE_ADDRESS
-# if defined(__clang__)
-#  if __has_attribute(__no_address_safety_analysis__)
-#   define FOLLY_DISABLE_ADDRESS_SANITIZER \
-      __attribute__((__no_address_safety_analysis__, __noinline__))
-#  elif __has_attribute(__no_sanitize_address__)
-#   define FOLLY_DISABLE_ADDRESS_SANITIZER \
-      __attribute__((__no_sanitize_address__, __noinline__))
-#  endif
-# elif defined(__GNUC__)
-#  define FOLLY_DISABLE_ADDRESS_SANITIZER \
-     __attribute__((__no_address_safety_analysis__, __noinline__))
-# endif
-#endif
-#ifndef FOLLY_DISABLE_ADDRESS_SANITIZER
-# define FOLLY_DISABLE_ADDRESS_SANITIZER
-#endif
-
 // It turns out that GNU libstdc++ and LLVM libc++ differ on how they implement
 // the 'std' namespace; the latter uses inline namepsaces. Wrap this decision
 // up in a macro to make forward-declarations easier.
 #if FOLLY_USE_LIBCPP
+#include <__config>
 #define FOLLY_NAMESPACE_STD_BEGIN     _LIBCPP_BEGIN_NAMESPACE_STD
 #define FOLLY_NAMESPACE_STD_END       _LIBCPP_END_NAMESPACE_STD
 #else
@@ -134,9 +210,17 @@ struct MaxAlign { char c; } __attribute__((aligned));
 #if FOLLY_HAVE_CLOCK_GETTIME
 #include <time.h>
 #else
-#include "folly/detail/Clock.h"
+#include <folly/detail/Clock.h>
 #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
@@ -148,10 +232,87 @@ struct MaxAlign { char c; } __attribute__((aligned));
 // 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)
+#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)
+#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
+
+// this definition is in a really silly place with a silly name
+// and ifdefing it every time we want it is painful
+#include <basetsd.h>
+typedef SSIZE_T ssize_t;
+
+// 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__
+#endif
+
+#if FOLLY_UNUSUAL_GFLAGS_NAMESPACE
+namespace FOLLY_GFLAGS_NAMESPACE { }
+namespace gflags {
+using namespace FOLLY_GFLAGS_NAMESPACE;
+}  // namespace gflags
+#endif
+
+// for TARGET_OS_IPHONE
+#ifdef __APPLE__
+#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>
+#endif
+
+namespace folly {
+
+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
+  asm volatile ("wfe");
 #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
+  asm ("wfe");
+#endif
+}
+
+}
 
 #endif // FOLLY_PORTABILITY_H_