allow AsyncSignalHandler to attach and detach from an EventBase

[folly.git] / folly / Portability.h

diff --git a/folly/Portability.h b/folly/Portability.h
index 17c064ba8a6f01d1d9771942a2c99a091cbf5241..7063e07237b3115d850206966052b625326deb95 100644 (file)
--- a/folly/Portability.h
+++ b/folly/Portability.h
@@ -24,10 +24,6 @@
 
 #include <folly/CPortability.h>
 
-#if FOLLY_HAVE_SCHED_H
- #include <sched.h>
-#endif
-
 // Unaligned loads and stores
 namespace folly {
 #if FOLLY_HAVE_UNALIGNED_ACCESS
@@ -75,12 +71,19 @@ constexpr bool kHasUnalignedAccess = false;
 #endif
 
 // warn unused result
+#if defined(__has_cpp_attribute)
+#if __has_cpp_attribute(nodiscard)
+#define FOLLY_NODISCARD [[nodiscard]]
+#endif
+#endif
+#if !defined FOLLY_NODISCARD
 #if defined(_MSC_VER) && (_MSC_VER >= 1700)
-#define FOLLY_WARN_UNUSED_RESULT _Check_return_
+#define FOLLY_NODISCARD _Check_return_
 #elif defined(__clang__) || defined(__GNUC__)
-#define FOLLY_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+#define FOLLY_NODISCARD __attribute__((__warn_unused_result__))
 #else
-#define FOLLY_WARN_UNUSED_RESULT
+#define FOLLY_NODISCARD
+#endif
 #endif
 
 // target
@@ -115,6 +118,21 @@ constexpr bool kIsArchAArch64 = FOLLY_A64 == 1;
 constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
 }
 
+namespace folly {
+
+#if FOLLY_SANITIZE_ADDRESS
+constexpr bool kIsSanitizeAddress = true;
+#else
+constexpr bool kIsSanitizeAddress = false;
+#endif
+
+#if FOLLY_SANITIZE_THREAD
+constexpr bool kIsSanitizeThread = true;
+#else
+constexpr bool kIsSanitizeThread = false;
+#endif
+}
+
 // packing is very ugly in msvc
 #ifdef _MSC_VER
 # define FOLLY_PACK_ATTR /**/
@@ -140,12 +158,10 @@ constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
 #elif defined(__clang__) || defined(__GNUC__)
 # define FOLLY_PUSH_WARNING _Pragma("GCC diagnostic push")
 # define FOLLY_POP_WARNING _Pragma("GCC diagnostic pop")
-#define FOLLY_GCC_DISABLE_WARNING_INTERNAL3(warningName) #warningName
-#define FOLLY_GCC_DISABLE_WARNING_INTERNAL2(warningName) \
-  FOLLY_GCC_DISABLE_WARNING_INTERNAL3(warningName)
-#define FOLLY_GCC_DISABLE_WARNING(warningName)                       \
-  _Pragma(FOLLY_GCC_DISABLE_WARNING_INTERNAL2(GCC diagnostic ignored \
-          FOLLY_GCC_DISABLE_WARNING_INTERNAL3(-W##warningName)))
+# define FOLLY_GCC_DISABLE_WARNING_INTERNAL2(warningName) #warningName
+# define FOLLY_GCC_DISABLE_WARNING(warningName) \
+  _Pragma(                                      \
+  FOLLY_GCC_DISABLE_WARNING_INTERNAL2(GCC diagnostic ignored warningName))
 // Disable the MSVC warnings.
 # define FOLLY_MSVC_DISABLE_WARNING(warningNumber)
 #else
@@ -157,8 +173,8 @@ constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
 
 #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)
+  FOLLY_GCC_DISABLE_WARNING("-Wshadow-compatible-local") \
+  FOLLY_GCC_DISABLE_WARNING("-Wshadow-local")
 #else
 #define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS /* empty */
 #endif
@@ -322,6 +338,12 @@ using namespace FOLLY_GFLAGS_NAMESPACE;
 
 namespace folly {
 
+#if __OBJC__
+constexpr auto kIsObjC = true;
+#else
+constexpr auto kIsObjC = false;
+#endif
+
 #if defined(__linux__) && !FOLLY_MOBILE
 constexpr auto kIsLinux = true;
 #else
@@ -330,7 +352,9 @@ constexpr auto kIsLinux = false;
 
 #if defined(_WIN32)
 constexpr auto kIsWindows = true;
+constexpr auto kMscVer = _MSC_VER;
 #else
 constexpr auto kIsWindows = false;
+constexpr auto kMscVer = 0;
 #endif
 }