/*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2013-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
# endif
#endif
+// portable version check for clang
+#ifndef __CLANG_PREREQ
+# if defined __clang__ && defined __clang_major__ && defined __clang_minor__
+/* nolint */
+# define __CLANG_PREREQ(maj, min) \
+ ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
+# else
+/* nolint */
+# define __CLANG_PREREQ(maj, min) 0
+# endif
+#endif
+
+#if defined(__has_builtin)
+#define FOLLY_HAS_BUILTIN(...) __has_builtin(__VA_ARGS__)
+#else
+#define FOLLY_HAS_BUILTIN(...) 0
+#endif
+
+#if defined(__has_feature)
+#define FOLLY_HAS_FEATURE(...) __has_feature(__VA_ARGS__)
+#else
+#define FOLLY_HAS_FEATURE(...) 0
+#endif
+
+#if defined(__has_include)
+#define FOLLY_HAS_INCLUDE(...) __has_include(__VA_ARGS__)
+#else
+#define FOLLY_HAS_INCLUDE(...) 0
+#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__
+#if FOLLY_HAS_FEATURE(address_sanitizer) || __SANITIZE_ADDRESS__
# define FOLLY_SANITIZE_ADDRESS 1
#endif
/* Define a convenience macro to test when thread sanitizer is being used
* across the different compilers (e.g. clang, gcc) */
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-# define FOLLY_SANITIZE_THREAD 1
-# endif
-#elif defined(__GNUC__) && __SANITIZE_THREAD__
+#if FOLLY_HAS_FEATURE(thread_sanitizer) || __SANITIZE_THREAD__
# define FOLLY_SANITIZE_THREAD 1
#endif
+/**
+ * Define a convenience macro to test when ASAN, UBSAN or TSAN sanitizer are
+ * being used
+ */
+#if defined(FOLLY_SANITIZE_ADDRESS) || defined(FOLLY_SANITIZE_THREAD) || \
+ defined(UNDEFINED_SANITIZER)
+#define FOLLY_SANITIZE 1
+#endif
+
/**
* ASAN/MSAN/TSAN define pre-processor symbols:
* ADDRESS_SANITIZER/MEMORY_SANITIZER/THREAD_SANITIZER.
* used as folly whitelists some functions.
*/
#if UNDEFINED_SANITIZER
-# define UBSAN_DISABLE(x) __attribute__((no_sanitize(x)))
+#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...) \
+ __attribute__((no_sanitize(__VA_ARGS__)))
#else
-# define UBSAN_DISABLE(x)
+#define FOLLY_DISABLE_UNDEFINED_BEHAVIOR_SANITIZER(...)
#endif // UNDEFINED_SANITIZER
/**
#else
# define FOLLY_ALWAYS_INLINE inline
#endif
+
+// attribute hidden
+#if _MSC_VER
+#define FOLLY_ATTR_VISIBILITY_HIDDEN
+#elif defined(__clang__) || defined(__GNUC__)
+#define FOLLY_ATTR_VISIBILITY_HIDDEN __attribute__((__visibility__("hidden")))
+#else
+#define FOLLY_ATTR_VISIBILITY_HIDDEN
+#endif