diff options
Diffstat (limited to 'src/google/protobuf/stubs/port.h')
| -rw-r--r-- | src/google/protobuf/stubs/port.h | 160 |
1 files changed, 121 insertions, 39 deletions
diff --git a/src/google/protobuf/stubs/port.h b/src/google/protobuf/stubs/port.h index 6f0633c4..6b52305f 100644 --- a/src/google/protobuf/stubs/port.h +++ b/src/google/protobuf/stubs/port.h @@ -44,6 +44,8 @@ #include <stdint.h> #endif +#include <google/protobuf/stubs/platform_macros.h> + #undef PROTOBUF_LITTLE_ENDIAN #ifdef _WIN32 // Assuming windows is always little-endian. @@ -89,12 +91,15 @@ // These #includes are for the byte swap functions declared later on. #ifdef _MSC_VER #include <stdlib.h> // NOLINT(build/include) +#include <intrin.h> #elif defined(__APPLE__) #include <libkern/OSByteOrder.h> -#elif defined(__GLIBC__) || defined(__CYGWIN__) +#elif defined(__GLIBC__) || defined(__BIONIC__) || defined(__CYGWIN__) #include <byteswap.h> // IWYU pragma: export #endif +#define PROTOBUF_RUNTIME_DEPRECATED(message) + // =================================================================== // from google3/base/port.h @@ -106,6 +111,18 @@ #define LANG_CXX11 1 #endif +#if LANG_CXX11 && !defined(__NVCC__) +#define PROTOBUF_CXX11 1 +#else +#define PROTOBUF_CXX11 0 +#endif + +#if PROTOBUF_CXX11 +#define PROTOBUF_FINAL final +#else +#define PROTOBUF_FINAL +#endif + namespace google { namespace protobuf { @@ -175,6 +192,8 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #endif #endif +#define GOOGLE_PROTOBUF_ATTRIBUTE_ALWAYS_INLINE GOOGLE_ATTRIBUTE_ALWAYS_INLINE + #ifndef GOOGLE_ATTRIBUTE_NOINLINE #if defined(__GNUC__) && (__GNUC__ > 3 ||(__GNUC__ == 3 && __GNUC_MINOR__ >= 1)) // For functions we want to force not inline. @@ -189,24 +208,21 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #endif #endif -#ifndef GOOGLE_ATTRIBUTE_NORETURN -#ifdef __GNUC__ -// Tell the compiler that a given function never returns. -#define GOOGLE_ATTRIBUTE_NORETURN __attribute__((noreturn)) -#else -#define GOOGLE_ATTRIBUTE_NORETURN -#endif -#endif +#define GOOGLE_PROTOBUF_ATTRIBUTE_NOINLINE GOOGLE_ATTRIBUTE_NOINLINE -#ifndef GOOGLE_ATTRIBUTE_DEPRECATED -#ifdef __GNUC__ -// If the method/variable/type is used anywhere, produce a warning. -#define GOOGLE_ATTRIBUTE_DEPRECATED __attribute__((deprecated)) +#ifndef GOOGLE_ATTRIBUTE_FUNC_ALIGN +#if defined(__clang__) || \ + defined(__GNUC__) && (__GNUC__ > 4 ||(__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) +// Function alignment attribute introduced in gcc 4.3 +#define GOOGLE_ATTRIBUTE_FUNC_ALIGN(bytes) __attribute__ ((aligned(bytes))) #else -#define GOOGLE_ATTRIBUTE_DEPRECATED +#define GOOGLE_ATTRIBUTE_FUNC_ALIGN(bytes) #endif #endif +#define GOOGLE_PROTOBUF_ATTRIBUTE_FUNC_ALIGN(bytes) \ + GOOGLE_ATTRIBUTE_FUNC_ALIGN(bytes) + #ifndef GOOGLE_PREDICT_TRUE #ifdef __GNUC__ // Provided at least since GCC 3.0. @@ -225,6 +241,13 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #endif #endif +#ifndef GOOGLE_PROTOBUF_ATTRIBUTE_RETURNS_NONNULL +#ifdef __GNUC__ +#define GOOGLE_PROTOBUF_ATTRIBUTE_RETURNS_NONNULL \ + __attribute__((returns_nonnull)) +#endif +#endif + // Delimits a block of code which may write to memory which is simultaneously // written by other threads, but which has been determined to be thread-safe // (e.g. because it is an idempotent write). @@ -235,24 +258,62 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #define GOOGLE_SAFE_CONCURRENT_WRITES_END() #endif -#if defined(__clang__) && defined(__has_cpp_attribute) \ - && !defined(GOOGLE_PROTOBUF_OS_APPLE) -# if defined(GOOGLE_PROTOBUF_OS_NACL) || defined(EMSCRIPTEN) || \ - __has_cpp_attribute(clang::fallthrough) -# define GOOGLE_FALLTHROUGH_INTENDED [[clang::fallthrough]] +#define GOOGLE_GUARDED_BY(x) +#define GOOGLE_ATTRIBUTE_COLD + +#ifdef GOOGLE_PROTOBUF_DONT_USE_UNALIGNED +# define GOOGLE_PROTOBUF_USE_UNALIGNED 0 +#else +# if defined(_M_X64) || defined(__x86_64__) || defined(_M_IX86) || defined(__i386__) +# define GOOGLE_PROTOBUF_USE_UNALIGNED 1 +# else +# define GOOGLE_PROTOBUF_USE_UNALIGNED 0 # endif #endif -#ifndef GOOGLE_FALLTHROUGH_INTENDED -# define GOOGLE_FALLTHROUGH_INTENDED -#endif +#define GOOGLE_PROTOBUF_ATTRIBUTE_COLD GOOGLE_ATTRIBUTE_COLD -#define GOOGLE_GUARDED_BY(x) -#define GOOGLE_ATTRIBUTE_COLD +#if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) ||\ + defined(MEMORY_SANITIZER) -// x86 and x86-64 can perform unaligned loads/stores directly. -#if defined(_M_X64) || defined(__x86_64__) || \ - defined(_M_IX86) || defined(__i386__) +#ifdef __cplusplus +extern "C" { +#endif // __cplusplus +uint16_t __sanitizer_unaligned_load16(const void *p); +uint32_t __sanitizer_unaligned_load32(const void *p); +uint64_t __sanitizer_unaligned_load64(const void *p); +void __sanitizer_unaligned_store16(void *p, uint16_t v); +void __sanitizer_unaligned_store32(void *p, uint32_t v); +void __sanitizer_unaligned_store64(void *p, uint64_t v); +#ifdef __cplusplus +} // extern "C" +#endif // __cplusplus + +inline uint16 GOOGLE_UNALIGNED_LOAD16(const void *p) { + return __sanitizer_unaligned_load16(p); +} + +inline uint32 GOOGLE_UNALIGNED_LOAD32(const void *p) { + return __sanitizer_unaligned_load32(p); +} + +inline uint64 GOOGLE_UNALIGNED_LOAD64(const void *p) { + return __sanitizer_unaligned_load64(p); +} + +inline void GOOGLE_UNALIGNED_STORE16(void *p, uint16 v) { + __sanitizer_unaligned_store16(p, v); +} + +inline void GOOGLE_UNALIGNED_STORE32(void *p, uint32 v) { + __sanitizer_unaligned_store32(p, v); +} + +inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64 v) { + __sanitizer_unaligned_store64(p, v); +} + +#elif GOOGLE_PROTOBUF_USE_UNALIGNED #define GOOGLE_UNALIGNED_LOAD16(_p) (*reinterpret_cast<const uint16 *>(_p)) #define GOOGLE_UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32 *>(_p)) @@ -294,6 +355,13 @@ inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64 v) { } #endif +#if defined(GOOGLE_PROTOBUF_OS_NACL) \ + || (defined(__ANDROID__) && defined(__clang__) \ + && (__clang_major__ == 3 && __clang_minor__ == 8) \ + && (__clang_patchlevel__ < 275480)) +# define GOOGLE_PROTOBUF_USE_PORTABLE_LOG2 +#endif + #if defined(_MSC_VER) #define GOOGLE_THREAD_LOCAL __declspec(thread) #else @@ -312,7 +380,7 @@ inline void GOOGLE_UNALIGNED_STORE64(void *p, uint64 v) { #define bswap_32(x) OSSwapInt32(x) #define bswap_64(x) OSSwapInt64(x) -#elif !defined(__GLIBC__) && !defined(__CYGWIN__) +#elif !defined(__GLIBC__) && !defined(__BIONIC__) && !defined(__CYGWIN__) static inline uint16 bswap_16(uint16 x) { return static_cast<uint16>(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8)); @@ -346,21 +414,29 @@ class Bits { public: static uint32 Log2FloorNonZero(uint32 n) { #if defined(__GNUC__) - return 31 ^ __builtin_clz(n); -#elif defined(COMPILER_MSVC) && defined(_M_IX86) - _asm { - bsr ebx, n - mov n, ebx - } - return n; + return 31 ^ static_cast<uint32>(__builtin_clz(n)); +#elif defined(_MSC_VER) + unsigned long where; + _BitScanReverse(&where, n); + return where; #else return Log2FloorNonZero_Portable(n); #endif } static uint32 Log2FloorNonZero64(uint64 n) { -#if defined(__GNUC__) - return 63 ^ __builtin_clzll(n); + // Older versions of clang run into an instruction-selection failure when + // it encounters __builtin_clzll: + // https://bugs.chromium.org/p/nativeclient/issues/detail?id=4395 + // This includes arm-nacl-clang and clang in older Android NDK versions. + // To work around this, when we build with those we use the portable + // implementation instead. +#if defined(__GNUC__) && !defined(GOOGLE_PROTOBUF_USE_PORTABLE_LOG2) + return 63 ^ static_cast<uint32>(__builtin_clzll(n)); +#elif defined(_MSC_VER) && defined(_M_X64) + unsigned long where; + _BitScanReverse64(&where, n); + return where; #else return Log2FloorNonZero64_Portable(n); #endif @@ -387,9 +463,9 @@ class Bits { const uint32 topbits = static_cast<uint32>(n >> 32); if (topbits == 0) { // Top bits are zero, so scan in bottom bits - return Log2FloorNonZero(static_cast<uint32>(n)); + return static_cast<int>(Log2FloorNonZero(static_cast<uint32>(n))); } else { - return 32 + Log2FloorNonZero(topbits); + return 32 + static_cast<int>(Log2FloorNonZero(topbits)); } } }; @@ -454,6 +530,12 @@ class BigEndian { } }; +#ifndef GOOGLE_ATTRIBUTE_SECTION_VARIABLE +#define GOOGLE_ATTRIBUTE_SECTION_VARIABLE(name) +#endif + +#define GOOGLE_PROTOBUF_ATTRIBUTE_SECTION_VARIABLE(name) + } // namespace protobuf } // namespace google |