diff options
Diffstat (limited to 'src/google/protobuf/stubs/port.h')
| -rw-r--r-- | src/google/protobuf/stubs/port.h | 77 |
1 files changed, 51 insertions, 26 deletions
diff --git a/src/google/protobuf/stubs/port.h b/src/google/protobuf/stubs/port.h index cecefdcb..3aa6403b 100644 --- a/src/google/protobuf/stubs/port.h +++ b/src/google/protobuf/stubs/port.h @@ -91,9 +91,10 @@ // 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 @@ -209,6 +210,19 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #define GOOGLE_PROTOBUF_ATTRIBUTE_NOINLINE GOOGLE_ATTRIBUTE_NOINLINE +#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_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. @@ -227,6 +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). @@ -237,20 +258,6 @@ 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]] -# endif -#elif defined(__GNUC__) && __GNUC__ > 6 -# define GOOGLE_FALLTHROUGH_INTENDED [[gnu::fallthrough]] -#endif - -#ifndef GOOGLE_FALLTHROUGH_INTENDED -# define GOOGLE_FALLTHROUGH_INTENDED -#endif - #define GOOGLE_GUARDED_BY(x) #define GOOGLE_ATTRIBUTE_COLD @@ -348,6 +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 @@ -366,12 +380,16 @@ 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__) +#ifndef bswap_16 static inline uint16 bswap_16(uint16 x) { return static_cast<uint16>(((x & 0xFF) << 8) | ((x & 0xFF00) >> 8)); } #define bswap_16(x) bswap_16(x) +#endif + +#ifndef bswap_32 static inline uint32 bswap_32(uint32 x) { return (((x & 0xFF) << 24) | ((x & 0xFF00) << 8) | @@ -379,6 +397,9 @@ static inline uint32 bswap_32(uint32 x) { ((x & 0xFF000000) >> 24)); } #define bswap_32(x) bswap_32(x) +#endif + +#ifndef bswap_64 static inline uint64 bswap_64(uint64 x) { return (((x & GOOGLE_ULONGLONG(0xFF)) << 56) | ((x & GOOGLE_ULONGLONG(0xFF00)) << 40) | @@ -390,6 +411,7 @@ static inline uint64 bswap_64(uint64 x) { ((x & GOOGLE_ULONGLONG(0xFF00000000000000)) >> 56)); } #define bswap_64(x) bswap_64(x) +#endif #endif @@ -401,25 +423,28 @@ class Bits { static uint32 Log2FloorNonZero(uint32 n) { #if defined(__GNUC__) return 31 ^ static_cast<uint32>(__builtin_clz(n)); -#elif defined(COMPILER_MSVC) && defined(_M_IX86) - _asm { - bsr ebx, n - mov n, ebx - } - return n; +#elif defined(_MSC_VER) + unsigned long where; + _BitScanReverse(&where, n); + return where; #else return Log2FloorNonZero_Portable(n); #endif } static uint32 Log2FloorNonZero64(uint64 n) { - // arm-nacl-clang runs into an instruction-selection failure when it - // encounters __builtin_clzll: + // 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 - // To work around this, when we build for NaCl we use the portable + // 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_OS_NACL) +#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 |