diff options
Diffstat (limited to 'src/google/protobuf/stubs/port.h')
| -rw-r--r-- | src/google/protobuf/stubs/port.h | 224 |
1 files changed, 191 insertions, 33 deletions
diff --git a/src/google/protobuf/stubs/port.h b/src/google/protobuf/stubs/port.h index 1036dff1..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. @@ -60,8 +62,12 @@ #endif #else #include <sys/param.h> // __BYTE_ORDER + #if defined(__OpenBSD__) + #include <endian.h> + #endif #if ((defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)) || \ - (defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN)) && \ + (defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN) || \ + (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN)) && \ !defined(PROTOBUF_DISABLE_LITTLE_ENDIAN_OPT_FOR_TEST) #define PROTOBUF_LITTLE_ENDIAN 1 #endif @@ -85,14 +91,38 @@ // 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 + +#if (defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L || \ + (defined(_MSC_VER) && _MSC_VER >= 1900)) +// Define this to 1 if the code is compiled in C++11 mode; leave it +// undefined otherwise. Do NOT define it to 0 -- that causes +// '#ifdef LANG_CXX11' to behave differently from '#if LANG_CXX11'. +#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 { @@ -109,15 +139,15 @@ typedef unsigned __int16 uint16; typedef unsigned __int32 uint32; typedef unsigned __int64 uint64; #else -typedef signed char int8; -typedef short int16; -typedef int int32; -typedef long long int64; - -typedef unsigned char uint8; -typedef unsigned short uint16; -typedef unsigned int uint32; -typedef unsigned long long uint64; +typedef int8_t int8; +typedef int16_t int16; +typedef int32_t int32; +typedef int64_t int64; + +typedef uint8_t uint8; +typedef uint16_t uint16; +typedef uint32_t uint32; +typedef uint64_t uint64; #endif // long long macros to be used because gcc and vc++ use different suffixes, @@ -131,8 +161,10 @@ typedef unsigned long long uint64; #define GOOGLE_ULONGLONG(x) x##UI64 #define GOOGLE_LL_FORMAT "I64" // As in printf("%I64d", ...) #else +// By long long, we actually mean int64. #define GOOGLE_LONGLONG(x) x##LL #define GOOGLE_ULONGLONG(x) x##ULL +// Used to format real long long integers. #define GOOGLE_LL_FORMAT "ll" // As in "%lld". Note that "q" is poor form also. #endif @@ -160,6 +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. @@ -174,15 +208,21 @@ static const uint64 kuint64max = GOOGLE_ULONGLONG(0xFFFFFFFFFFFFFFFF); #endif #endif -#ifndef GOOGLE_ATTRIBUTE_DEPRECATED -#ifdef __GNUC__ -// If the method/variable/type is used anywhere, produce a warning. -#define GOOGLE_ATTRIBUTE_DEPRECATED __attribute__((deprecated)) +#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_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. @@ -201,6 +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). @@ -211,24 +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) + +#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); +} -// x86 and x86-64 can perform unaligned loads/stores directly. -#if defined(_M_X64) || defined(__x86_64__) || \ - defined(_M_IX86) || defined(__i386__) +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)) @@ -270,16 +355,21 @@ 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 #define GOOGLE_THREAD_LOCAL __thread #endif -// The following guarantees declaration of the byte swap functions, and -// defines __BYTE_ORDER for MSVC +// The following guarantees declaration of the byte swap functions. #ifdef _MSC_VER -#define __BYTE_ORDER __LITTLE_ENDIAN #define bswap_16(x) _byteswap_ushort(x) #define bswap_32(x) _byteswap_ulong(x) #define bswap_64(x) _byteswap_uint64(x) @@ -290,7 +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)); @@ -318,6 +408,69 @@ static inline uint64 bswap_64(uint64 x) { #endif // =================================================================== +// from google3/util/bits/bits.h + +class Bits { + public: + static uint32 Log2FloorNonZero(uint32 n) { +#if defined(__GNUC__) + 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) { + // 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 + } + private: + static int Log2FloorNonZero_Portable(uint32 n) { + if (n == 0) + return -1; + int log = 0; + uint32 value = n; + for (int i = 4; i >= 0; --i) { + int shift = (1 << i); + uint32 x = value >> shift; + if (x != 0) { + value = x; + log += shift; + } + } + assert(value == 1); + return log; + } + + static int Log2FloorNonZero64_Portable(uint64 n) { + const uint32 topbits = static_cast<uint32>(n >> 32); + if (topbits == 0) { + // Top bits are zero, so scan in bottom bits + return static_cast<int>(Log2FloorNonZero(static_cast<uint32>(n))); + } else { + return 32 + static_cast<int>(Log2FloorNonZero(topbits)); + } + } +}; + +// =================================================================== // from google3/util/endian/endian.h LIBPROTOBUF_EXPORT uint32 ghtonl(uint32 x); @@ -377,6 +530,11 @@ 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 |