include/grpc/impl/codegen/port_platform.h - platform/external/grpc-grpc - Git at Google

 /*
  *
  * Copyright 2015 gRPC authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  */

 #ifndef GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
 #define GRPC_IMPL_CODEGEN_PORT_PLATFORM_H

 /*
  * Define GPR_BACKWARDS_COMPATIBILITY_MODE to try harder to be ABI
  * compatible with older platforms (currently only on Linux)
  * Causes:
  *  - some libc calls to be gotten via dlsym
  *  - some syscalls to be made directly
  */

 /* Get windows.h included everywhere (we need it) */
 #if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
 #ifndef WIN32_LEAN_AND_MEAN
 #define GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
 #define WIN32_LEAN_AND_MEAN
 #endif /* WIN32_LEAN_AND_MEAN */

 #ifndef NOMINMAX
 #define GRPC_NOMINMX_WAS_NOT_DEFINED
 #define NOMINMAX
 #endif /* NOMINMAX */

 #ifndef _WIN32_WINNT
 #error \
     "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
 #else /* !defined(_WIN32_WINNT) */
 #if (_WIN32_WINNT < 0x0600)
 #error \
     "Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
 #endif /* _WIN32_WINNT < 0x0600 */
 #endif /* defined(_WIN32_WINNT) */

 #include <windows.h>

 #ifdef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
 #undef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
 #undef WIN32_LEAN_AND_MEAN
 #endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */

 #ifdef GRPC_NOMINMAX_WAS_NOT_DEFINED
 #undef GRPC_NOMINMAX_WAS_NOT_DEFINED
 #undef NOMINMAX
 #endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
 #endif /* defined(_WIN64) || defined(WIN64) || defined(_WIN32) || \
           defined(WIN32) */

 /* Override this file with one for your platform if you need to redefine
    things.  */

 #if !defined(GPR_NO_AUTODETECT_PLATFORM)
 #if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
 #if defined(_WIN64) || defined(WIN64)
 #define GPR_ARCH_64 1
 #else
 #define GPR_ARCH_32 1
 #endif
 #define GPR_PLATFORM_STRING "windows"
 #define GPR_WINDOWS 1
 #define GPR_WINDOWS_SUBPROCESS 1
 #define GPR_WINDOWS_ENV
 #ifdef __MSYS__
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_MSYS_TMPFILE
 #define GPR_POSIX_LOG
 #define GPR_POSIX_STRING
 #define GPR_POSIX_TIME
 #else
 #define GPR_GETPID_IN_PROCESS_H 1
 #define GPR_WINDOWS_TMPFILE
 #define GPR_WINDOWS_LOG
 #define GPR_WINDOWS_CRASH_HANDLER 1
 #define GPR_WINDOWS_STRING
 #define GPR_WINDOWS_TIME
 #endif
 #ifdef __GNUC__
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #else
 #define GPR_WINDOWS_ATOMIC 1
 #define GPR_MSVC_TLS 1
 #endif
 #elif defined(GPR_MANYLINUX1)
 // TODO(atash): manylinux1 is just another __linux__ but with ancient
 // libraries; it should be integrated with the `__linux__` definitions below.
 #define GPR_PLATFORM_STRING "manylinux"
 #define GPR_POSIX_CRASH_HANDLER 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_LINUX 1
 #define GPR_LINUX_LOG 1
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_LINUX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(ANDROID) || defined(__ANDROID__)
 #define GPR_PLATFORM_STRING "android"
 #define GPR_ANDROID 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_SYNC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_ANDROID_LOG 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #elif defined(__linux__)
 #define GPR_PLATFORM_STRING "linux"
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
 #endif
 #ifndef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE
 #endif
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
 #include <features.h>
 #define GPR_CPU_LINUX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_LINUX 1
 #define GPR_LINUX_LOG
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #define GPR_LINUX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #ifdef __GLIBC__
 #define GPR_POSIX_CRASH_HANDLER 1
 #define GPR_LINUX_PTHREAD_NAME 1
 #include <linux/version.h>
 #else /* musl libc */
 #define GPR_MUSL_LIBC_COMPAT 1
 #endif
 #elif defined(__APPLE__)
 #include <Availability.h>
 #include <TargetConditionals.h>
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
 #endif
 #if TARGET_OS_IPHONE
 #define GPR_PLATFORM_STRING "ios"
 #define GPR_CPU_IPHONE 1
 #define GPR_PTHREAD_TLS 1
 #else /* TARGET_OS_IPHONE */
 #define GPR_PLATFORM_STRING "osx"
 #ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 #if __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7
 #define GPR_CPU_IPHONE 1
 #define GPR_PTHREAD_TLS 1
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7 */
 #define GPR_CPU_POSIX 1
 /* TODO(vjpai): there is a reported issue in bazel build for Mac where __thread
    in a header is currently not working (bazelbuild/bazel#4341). Remove
    the following conditional and use GPR_GCC_TLS when that is fixed */
 #ifndef GRPC_BAZEL_BUILD
 #define GPR_GCC_TLS 1
 #else /* GRPC_BAZEL_BUILD */
 #define GPR_PTHREAD_TLS 1
 #endif /* GRPC_BAZEL_BUILD */
 #define GPR_APPLE_PTHREAD_NAME 1
 #endif
 #else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
 #define GPR_CPU_POSIX 1
 /* TODO(vjpai): Remove the following conditional and use only GPR_GCC_TLS
    when bazelbuild/bazel#4341 is fixed */
 #ifndef GRPC_BAZEL_BUILD
 #define GPR_GCC_TLS 1
 #else /* GRPC_BAZEL_BUILD */
 #define GPR_PTHREAD_TLS 1
 #endif /* GRPC_BAZEL_BUILD */
 #endif
 #define GPR_POSIX_CRASH_HANDLER 1
 #endif
 #define GPR_APPLE 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 /* TODO(mxyan): Remove when CFStream becomes default */
 #ifndef GRPC_CFSTREAM
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #endif
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(__FreeBSD__)
 #define GPR_PLATFORM_STRING "freebsd"
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
 #endif
 #define GPR_FREEBSD 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(__OpenBSD__)
 #define GPR_PLATFORM_STRING "openbsd"
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
 #endif
 #define GPR_OPENBSD 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #define GPR_SUPPORT_CHANNELS_FROM_FD 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(__sun) && defined(__SVR4)
 #define GPR_PLATFORM_STRING "solaris"
 #define GPR_SOLARIS 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(_AIX)
 #define GPR_PLATFORM_STRING "aix"
 #ifndef _ALL_SOURCE
 #define _ALL_SOURCE
 #endif
 #define GPR_AIX 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #elif defined(__native_client__)
 #define GPR_PLATFORM_STRING "nacl"
 #ifndef _BSD_SOURCE
 #define _BSD_SOURCE
 #endif
 #ifndef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE
 #endif
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
 #define GPR_NACL 1
 #define GPR_CPU_POSIX 1
 #define GPR_GCC_ATOMIC 1
 #define GPR_GCC_TLS 1
 #define GPR_POSIX_LOG 1
 #define GPR_POSIX_ENV 1
 #define GPR_POSIX_TMPFILE 1
 #define GPR_POSIX_STRING 1
 #define GPR_POSIX_SUBPROCESS 1
 #define GPR_POSIX_SYNC 1
 #define GPR_POSIX_TIME 1
 #define GPR_GETPID_IN_UNISTD_H 1
 #ifdef _LP64
 #define GPR_ARCH_64 1
 #else /* _LP64 */
 #define GPR_ARCH_32 1
 #endif /* _LP64 */
 #else
 #error "Could not auto-detect platform"
 #endif
 #endif /* GPR_NO_AUTODETECT_PLATFORM */

 /*
  *  There are platforms for which TLS should not be used even though the
  * compiler makes it seem like it's supported (Android NDK < r12b for example).
  * This is primarily because of linker problems and toolchain misconfiguration:
  * TLS isn't supported until NDK r12b per
  * https://developer.android.com/ndk/downloads/revision_history.html
  * TLS also does not work with Android NDK if GCC is being used as the compiler
  * instead of Clang.
  * Since NDK r16, `__NDK_MAJOR__` and `__NDK_MINOR__` are defined in
  * <android/ndk-version.h>. For NDK < r16, users should define these macros,
  * e.g. `-D__NDK_MAJOR__=11 -D__NKD_MINOR__=0` for NDK r11. */
 #if defined(__ANDROID__) && defined(GPR_GCC_TLS)
 #if __has_include(<android/ndk-version.h>)
 #include <android/ndk-version.h>
 #endif /* __has_include(<android/ndk-version.h>) */
 #if (defined(__clang__) && defined(__NDK_MAJOR__) && defined(__NDK_MINOR__) && \
      ((__NDK_MAJOR__ < 12) ||                                                  \
       ((__NDK_MAJOR__ == 12) && (__NDK_MINOR__ < 1)))) ||                      \
     (defined(__GNUC__) && !defined(__clang__))
 #undef GPR_GCC_TLS
 #define GPR_PTHREAD_TLS 1
 #endif
 #endif /*defined(__ANDROID__) && defined(GPR_GCC_TLS) */

 #if defined(__has_include)
 #if __has_include(<atomic>)
 #define GRPC_HAS_CXX11_ATOMIC
 #endif /* __has_include(<atomic>) */
 #endif /* defined(__has_include) */

 #ifndef GPR_PLATFORM_STRING
 #warning "GPR_PLATFORM_STRING not auto-detected"
 #define GPR_PLATFORM_STRING "unknown"
 #endif

 #ifdef GPR_GCOV
 #undef GPR_FORBID_UNREACHABLE_CODE
 #define GPR_FORBID_UNREACHABLE_CODE 1
 #endif

 #ifdef _MSC_VER
 #if _MSC_VER < 1700
 typedef __int8 int8_t;
 typedef __int16 int16_t;
 typedef __int32 int32_t;
 typedef __int64 int64_t;
 typedef unsigned __int8 uint8_t;
 typedef unsigned __int16 uint16_t;
 typedef unsigned __int32 uint32_t;
 typedef unsigned __int64 uint64_t;
 #else
 #include <stdint.h>
 #endif /* _MSC_VER < 1700 */
 #else
 #include <stdint.h>
 #endif /* _MSC_VER */

 /* Cache line alignment */
 #ifndef GPR_CACHELINE_SIZE_LOG
 #if defined(__i386__) || defined(__x86_64__)
 #define GPR_CACHELINE_SIZE_LOG 6
 #endif
 #ifndef GPR_CACHELINE_SIZE_LOG
 /* A reasonable default guess. Note that overestimates tend to waste more
    space, while underestimates tend to waste more time. */
 #define GPR_CACHELINE_SIZE_LOG 6
 #endif /* GPR_CACHELINE_SIZE_LOG */
 #endif /* GPR_CACHELINE_SIZE_LOG */

 #define GPR_CACHELINE_SIZE (1 << GPR_CACHELINE_SIZE_LOG)

 /* scrub GCC_ATOMIC if it's not available on this compiler */
 #if defined(GPR_GCC_ATOMIC) && !defined(__ATOMIC_RELAXED)
 #undef GPR_GCC_ATOMIC
 #define GPR_GCC_SYNC 1
 #endif

 /* Validate platform combinations */
 #if defined(GPR_GCC_ATOMIC) + defined(GPR_GCC_SYNC) + \
         defined(GPR_WINDOWS_ATOMIC) !=                \
     1
 #error Must define exactly one of GPR_GCC_ATOMIC, GPR_GCC_SYNC, GPR_WINDOWS_ATOMIC
 #endif

 #if defined(GPR_ARCH_32) + defined(GPR_ARCH_64) != 1
 #error Must define exactly one of GPR_ARCH_32, GPR_ARCH_64
 #endif

 #if defined(GPR_CPU_LINUX) + defined(GPR_CPU_POSIX) + defined(GPR_WINDOWS) + \
         defined(GPR_CPU_IPHONE) + defined(GPR_CPU_CUSTOM) !=                 \
     1
 #error Must define exactly one of GPR_CPU_LINUX, GPR_CPU_POSIX, GPR_WINDOWS, GPR_CPU_IPHONE, GPR_CPU_CUSTOM
 #endif

 #if defined(GPR_MSVC_TLS) + defined(GPR_GCC_TLS) + defined(GPR_PTHREAD_TLS) + \
         defined(GPR_CUSTOM_TLS) !=                                            \
     1
 #error Must define exactly one of GPR_MSVC_TLS, GPR_GCC_TLS, GPR_PTHREAD_TLS, GPR_CUSTOM_TLS
 #endif

 /* maximum alignment needed for any type on this platform, rounded up to a
    power of two */
 #define GPR_MAX_ALIGNMENT 16

 #ifndef GRPC_ARES
 #define GRPC_ARES 0 // Disable GRPC_ARES for Android due to missing dependency
 #endif

 #ifndef GRPC_MUST_USE_RESULT
 #if defined(__GNUC__) && !defined(__MINGW32__)
 #define GRPC_MUST_USE_RESULT __attribute__((warn_unused_result))
 #define GPR_ALIGN_STRUCT(n) __attribute__((aligned(n)))
 #else
 #define GRPC_MUST_USE_RESULT
 #define GPR_ALIGN_STRUCT(n)
 #endif
 #endif

 #ifndef GRPC_UNUSED
 #if defined(__GNUC__) && !defined(__MINGW32__)
 #define GRPC_UNUSED __attribute__((unused))
 #else
 #define GRPC_UNUSED
 #endif
 #endif

 #ifndef GPR_PRINT_FORMAT_CHECK
 #ifdef __GNUC__
 #define GPR_PRINT_FORMAT_CHECK(FORMAT_STR, ARGS) \
   __attribute__((format(printf, FORMAT_STR, ARGS)))
 #else
 #define GPR_PRINT_FORMAT_CHECK(FORMAT_STR, ARGS)
 #endif
 #endif /* GPR_PRINT_FORMAT_CHECK */

 #if GPR_FORBID_UNREACHABLE_CODE
 #define GPR_UNREACHABLE_CODE(STATEMENT)
 #else
 #define GPR_UNREACHABLE_CODE(STATEMENT)             \
   do {                                              \
     gpr_log(GPR_ERROR, "Should never reach here."); \
     abort();                                        \
     STATEMENT;                                      \
   } while (0)
 #endif /* GPR_FORBID_UNREACHABLE_CODE */

 #ifndef GPRAPI
 #define GPRAPI
 #endif

 #ifndef GRPCAPI
 #define GRPCAPI GPRAPI
 #endif

 #ifndef CENSUSAPI
 #define CENSUSAPI GRPCAPI
 #endif

 #ifndef GPR_ATTRIBUTE_NO_TSAN /* (1) */
 #if defined(__has_feature)
 #if __has_feature(thread_sanitizer)
 #define GPR_ATTRIBUTE_NO_TSAN __attribute__((no_sanitize("thread")))
 #endif                        /* __has_feature(thread_sanitizer) */
 #endif                        /* defined(__has_feature) */
 #ifndef GPR_ATTRIBUTE_NO_TSAN /* (2) */
 #define GPR_ATTRIBUTE_NO_TSAN
 #endif /* GPR_ATTRIBUTE_NO_TSAN (2) */
 #endif /* GPR_ATTRIBUTE_NO_TSAN (1) */

 /* GRPC_ALLOW_EXCEPTIONS should be 0 or 1 if exceptions are allowed or not */
 #ifndef GRPC_ALLOW_EXCEPTIONS
 /* If not already set, set to 1 on Windows (style guide standard) but to
  * 0 on non-Windows platforms unless the compiler defines __EXCEPTIONS */
 #ifdef GPR_WINDOWS
 #define GRPC_ALLOW_EXCEPTIONS 1
 #else /* GPR_WINDOWS */
 #ifdef __EXCEPTIONS
 #define GRPC_ALLOW_EXCEPTIONS 1
 #else /* __EXCEPTIONS */
 #define GRPC_ALLOW_EXCEPTIONS 0
 #endif /* __EXCEPTIONS */
 #endif /* __GPR_WINDOWS */
 #endif /* GRPC_ALLOW_EXCEPTIONS */

 /* Use GPR_LIKELY only in cases where you are sure that a certain outcome is the
  * most likely. Ideally, also collect performance numbers to justify the claim.
  */
 #ifdef __GNUC__
 #define GPR_LIKELY(x) __builtin_expect((x), 1)
 #define GPR_UNLIKELY(x) __builtin_expect((x), 0)
 #else /* __GNUC__ */
 #define GPR_LIKELY(x) (x)
 #define GPR_UNLIKELY(x) (x)
 #endif /* __GNUC__ */

 #ifndef __STDC_FORMAT_MACROS
 #define __STDC_FORMAT_MACROS
 #endif

 #endif /* GRPC_IMPL_CODEGEN_PORT_PLATFORM_H */
	/*
	*
	* Copyright 2015 gRPC authors.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/

	#ifndef GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
	#define GRPC_IMPL_CODEGEN_PORT_PLATFORM_H

	/*
	* Define GPR_BACKWARDS_COMPATIBILITY_MODE to try harder to be ABI
	* compatible with older platforms (currently only on Linux)
	* Causes:
	* - some libc calls to be gotten via dlsym
	* - some syscalls to be made directly
	*/

	/* Get windows.h included everywhere (we need it) */
	#if defined(_WIN64) \|\| defined(WIN64) \|\| defined(_WIN32) \|\| defined(WIN32)
	#ifndef WIN32_LEAN_AND_MEAN
	#define GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
	#define WIN32_LEAN_AND_MEAN
	#endif /* WIN32_LEAN_AND_MEAN */

	#ifndef NOMINMAX
	#define GRPC_NOMINMX_WAS_NOT_DEFINED
	#define NOMINMAX
	#endif /* NOMINMAX */

	#ifndef _WIN32_WINNT
	#error \
	"Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
	#else /* !defined(_WIN32_WINNT) */
	#if (_WIN32_WINNT < 0x0600)
	#error \
	"Please compile grpc with _WIN32_WINNT of at least 0x600 (aka Windows Vista)"
	#endif /* _WIN32_WINNT < 0x0600 */
	#endif /* defined(_WIN32_WINNT) */

	#include <windows.h>

	#ifdef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
	#undef GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED
	#undef WIN32_LEAN_AND_MEAN
	#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */

	#ifdef GRPC_NOMINMAX_WAS_NOT_DEFINED
	#undef GRPC_NOMINMAX_WAS_NOT_DEFINED
	#undef NOMINMAX
	#endif /* GRPC_WIN32_LEAN_AND_MEAN_WAS_NOT_DEFINED */
	#endif /* defined(_WIN64) \|\| defined(WIN64) \|\| defined(_WIN32) \|\| \
	defined(WIN32) */

	/* Override this file with one for your platform if you need to redefine
	things. */

	#if !defined(GPR_NO_AUTODETECT_PLATFORM)
	#if defined(_WIN64) \|\| defined(WIN64) \|\| defined(_WIN32) \|\| defined(WIN32)
	#if defined(_WIN64) \|\| defined(WIN64)
	#define GPR_ARCH_64 1
	#else
	#define GPR_ARCH_32 1
	#endif
	#define GPR_PLATFORM_STRING "windows"
	#define GPR_WINDOWS 1
	#define GPR_WINDOWS_SUBPROCESS 1
	#define GPR_WINDOWS_ENV
	#ifdef __MSYS__
	#define GPR_GETPID_IN_UNISTD_H 1
	#define GPR_MSYS_TMPFILE
	#define GPR_POSIX_LOG
	#define GPR_POSIX_STRING
	#define GPR_POSIX_TIME
	#else
	#define GPR_GETPID_IN_PROCESS_H 1
	#define GPR_WINDOWS_TMPFILE
	#define GPR_WINDOWS_LOG
	#define GPR_WINDOWS_CRASH_HANDLER 1
	#define GPR_WINDOWS_STRING
	#define GPR_WINDOWS_TIME
	#endif
	#ifdef __GNUC__
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#else
	#define GPR_WINDOWS_ATOMIC 1
	#define GPR_MSVC_TLS 1
	#endif
	#elif defined(GPR_MANYLINUX1)
	// TODO(atash): manylinux1 is just another __linux__ but with ancient
	// libraries; it should be integrated with the `__linux__` definitions below.
	#define GPR_PLATFORM_STRING "manylinux"
	#define GPR_POSIX_CRASH_HANDLER 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_LINUX 1
	#define GPR_LINUX_LOG 1
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#define GPR_LINUX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(ANDROID) \|\| defined(__ANDROID__)
	#define GPR_PLATFORM_STRING "android"
	#define GPR_ANDROID 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_SYNC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_ANDROID_LOG 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#elif defined(__linux__)
	#define GPR_PLATFORM_STRING "linux"
	#ifndef _BSD_SOURCE
	#define _BSD_SOURCE
	#endif
	#ifndef _DEFAULT_SOURCE
	#define _DEFAULT_SOURCE
	#endif
	#ifndef _GNU_SOURCE
	#define _GNU_SOURCE
	#endif
	#include <features.h>
	#define GPR_CPU_LINUX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_LINUX 1
	#define GPR_LINUX_LOG
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#define GPR_LINUX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#ifdef __GLIBC__
	#define GPR_POSIX_CRASH_HANDLER 1
	#define GPR_LINUX_PTHREAD_NAME 1
	#include <linux/version.h>
	#else /* musl libc */
	#define GPR_MUSL_LIBC_COMPAT 1
	#endif
	#elif defined(__APPLE__)
	#include <Availability.h>
	#include <TargetConditionals.h>
	#ifndef _BSD_SOURCE
	#define _BSD_SOURCE
	#endif
	#if TARGET_OS_IPHONE
	#define GPR_PLATFORM_STRING "ios"
	#define GPR_CPU_IPHONE 1
	#define GPR_PTHREAD_TLS 1
	#else /* TARGET_OS_IPHONE */
	#define GPR_PLATFORM_STRING "osx"
	#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
	#if __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7
	#define GPR_CPU_IPHONE 1
	#define GPR_PTHREAD_TLS 1
	#else /* __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_7 */
	#define GPR_CPU_POSIX 1
	/* TODO(vjpai): there is a reported issue in bazel build for Mac where __thread
	in a header is currently not working (bazelbuild/bazel#4341). Remove
	the following conditional and use GPR_GCC_TLS when that is fixed */
	#ifndef GRPC_BAZEL_BUILD
	#define GPR_GCC_TLS 1
	#else /* GRPC_BAZEL_BUILD */
	#define GPR_PTHREAD_TLS 1
	#endif /* GRPC_BAZEL_BUILD */
	#define GPR_APPLE_PTHREAD_NAME 1
	#endif
	#else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
	#define GPR_CPU_POSIX 1
	/* TODO(vjpai): Remove the following conditional and use only GPR_GCC_TLS
	when bazelbuild/bazel#4341 is fixed */
	#ifndef GRPC_BAZEL_BUILD
	#define GPR_GCC_TLS 1
	#else /* GRPC_BAZEL_BUILD */
	#define GPR_PTHREAD_TLS 1
	#endif /* GRPC_BAZEL_BUILD */
	#endif
	#define GPR_POSIX_CRASH_HANDLER 1
	#endif
	#define GPR_APPLE 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	/* TODO(mxyan): Remove when CFStream becomes default */
	#ifndef GRPC_CFSTREAM
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#endif
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(__FreeBSD__)
	#define GPR_PLATFORM_STRING "freebsd"
	#ifndef _BSD_SOURCE
	#define _BSD_SOURCE
	#endif
	#define GPR_FREEBSD 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(__OpenBSD__)
	#define GPR_PLATFORM_STRING "openbsd"
	#ifndef _BSD_SOURCE
	#define _BSD_SOURCE
	#endif
	#define GPR_OPENBSD 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#define GPR_SUPPORT_CHANNELS_FROM_FD 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(__sun) && defined(__SVR4)
	#define GPR_PLATFORM_STRING "solaris"
	#define GPR_SOLARIS 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(_AIX)
	#define GPR_PLATFORM_STRING "aix"
	#ifndef _ALL_SOURCE
	#define _ALL_SOURCE
	#endif
	#define GPR_AIX 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#elif defined(__native_client__)
	#define GPR_PLATFORM_STRING "nacl"
	#ifndef _BSD_SOURCE
	#define _BSD_SOURCE
	#endif
	#ifndef _DEFAULT_SOURCE
	#define _DEFAULT_SOURCE
	#endif
	#ifndef _GNU_SOURCE
	#define _GNU_SOURCE
	#endif
	#define GPR_NACL 1
	#define GPR_CPU_POSIX 1
	#define GPR_GCC_ATOMIC 1
	#define GPR_GCC_TLS 1
	#define GPR_POSIX_LOG 1
	#define GPR_POSIX_ENV 1
	#define GPR_POSIX_TMPFILE 1
	#define GPR_POSIX_STRING 1
	#define GPR_POSIX_SUBPROCESS 1
	#define GPR_POSIX_SYNC 1
	#define GPR_POSIX_TIME 1
	#define GPR_GETPID_IN_UNISTD_H 1
	#ifdef _LP64
	#define GPR_ARCH_64 1
	#else /* _LP64 */
	#define GPR_ARCH_32 1
	#endif /* _LP64 */
	#else
	#error "Could not auto-detect platform"
	#endif
	#endif /* GPR_NO_AUTODETECT_PLATFORM */

	/*
	* There are platforms for which TLS should not be used even though the
	* compiler makes it seem like it's supported (Android NDK < r12b for example).
	* This is primarily because of linker problems and toolchain misconfiguration:
	* TLS isn't supported until NDK r12b per
	* https://developer.android.com/ndk/downloads/revision_history.html
	* TLS also does not work with Android NDK if GCC is being used as the compiler
	* instead of Clang.
	* Since NDK r16, `__NDK_MAJOR__` and `__NDK_MINOR__` are defined in
	* <android/ndk-version.h>. For NDK < r16, users should define these macros,
	* e.g. `-D__NDK_MAJOR__=11 -D__NKD_MINOR__=0` for NDK r11. */
	#if defined(__ANDROID__) && defined(GPR_GCC_TLS)
	#if __has_include(<android/ndk-version.h>)
	#include <android/ndk-version.h>
	#endif /* __has_include(<android/ndk-version.h>) */
	#if (defined(__clang__) && defined(__NDK_MAJOR__) && defined(__NDK_MINOR__) && \
	((__NDK_MAJOR__ < 12) \|\| \
	((__NDK_MAJOR__ == 12) && (__NDK_MINOR__ < 1)))) \|\| \
	(defined(__GNUC__) && !defined(__clang__))
	#undef GPR_GCC_TLS
	#define GPR_PTHREAD_TLS 1
	#endif
	#endif /defined(__ANDROID__) && defined(GPR_GCC_TLS) /

	#if defined(__has_include)
	#if __has_include(<atomic>)
	#define GRPC_HAS_CXX11_ATOMIC
	#endif /* __has_include(<atomic>) */
	#endif /* defined(__has_include) */

	#ifndef GPR_PLATFORM_STRING
	#warning "GPR_PLATFORM_STRING not auto-detected"
	#define GPR_PLATFORM_STRING "unknown"
	#endif

	#ifdef GPR_GCOV
	#undef GPR_FORBID_UNREACHABLE_CODE
	#define GPR_FORBID_UNREACHABLE_CODE 1
	#endif

	#ifdef _MSC_VER
	#if _MSC_VER < 1700
	typedef __int8 int8_t;
	typedef __int16 int16_t;
	typedef __int32 int32_t;
	typedef __int64 int64_t;
	typedef unsigned __int8 uint8_t;
	typedef unsigned __int16 uint16_t;
	typedef unsigned __int32 uint32_t;
	typedef unsigned __int64 uint64_t;
	#else
	#include <stdint.h>
	#endif /* _MSC_VER < 1700 */
	#else
	#include <stdint.h>
	#endif /* _MSC_VER */

	/* Cache line alignment */
	#ifndef GPR_CACHELINE_SIZE_LOG
	#if defined(__i386__) \|\| defined(__x86_64__)
	#define GPR_CACHELINE_SIZE_LOG 6
	#endif
	#ifndef GPR_CACHELINE_SIZE_LOG
	/* A reasonable default guess. Note that overestimates tend to waste more
	space, while underestimates tend to waste more time. */
	#define GPR_CACHELINE_SIZE_LOG 6
	#endif /* GPR_CACHELINE_SIZE_LOG */
	#endif /* GPR_CACHELINE_SIZE_LOG */

	#define GPR_CACHELINE_SIZE (1 << GPR_CACHELINE_SIZE_LOG)

	/* scrub GCC_ATOMIC if it's not available on this compiler */
	#if defined(GPR_GCC_ATOMIC) && !defined(__ATOMIC_RELAXED)
	#undef GPR_GCC_ATOMIC
	#define GPR_GCC_SYNC 1
	#endif

	/* Validate platform combinations */
	#if defined(GPR_GCC_ATOMIC) + defined(GPR_GCC_SYNC) + \
	defined(GPR_WINDOWS_ATOMIC) != \
	1
	#error Must define exactly one of GPR_GCC_ATOMIC, GPR_GCC_SYNC, GPR_WINDOWS_ATOMIC
	#endif

	#if defined(GPR_ARCH_32) + defined(GPR_ARCH_64) != 1
	#error Must define exactly one of GPR_ARCH_32, GPR_ARCH_64
	#endif

	#if defined(GPR_CPU_LINUX) + defined(GPR_CPU_POSIX) + defined(GPR_WINDOWS) + \
	defined(GPR_CPU_IPHONE) + defined(GPR_CPU_CUSTOM) != \
	1
	#error Must define exactly one of GPR_CPU_LINUX, GPR_CPU_POSIX, GPR_WINDOWS, GPR_CPU_IPHONE, GPR_CPU_CUSTOM
	#endif

	#if defined(GPR_MSVC_TLS) + defined(GPR_GCC_TLS) + defined(GPR_PTHREAD_TLS) + \
	defined(GPR_CUSTOM_TLS) != \
	1
	#error Must define exactly one of GPR_MSVC_TLS, GPR_GCC_TLS, GPR_PTHREAD_TLS, GPR_CUSTOM_TLS
	#endif

	/* maximum alignment needed for any type on this platform, rounded up to a
	power of two */
	#define GPR_MAX_ALIGNMENT 16

	#ifndef GRPC_ARES
	#define GRPC_ARES 0 // Disable GRPC_ARES for Android due to missing dependency
	#endif

	#ifndef GRPC_MUST_USE_RESULT
	#if defined(__GNUC__) && !defined(__MINGW32__)
	#define GRPC_MUST_USE_RESULT __attribute__((warn_unused_result))
	#define GPR_ALIGN_STRUCT(n) __attribute__((aligned(n)))
	#else
	#define GRPC_MUST_USE_RESULT
	#define GPR_ALIGN_STRUCT(n)
	#endif
	#endif

	#ifndef GRPC_UNUSED
	#if defined(__GNUC__) && !defined(__MINGW32__)
	#define GRPC_UNUSED __attribute__((unused))
	#else
	#define GRPC_UNUSED
	#endif
	#endif

	#ifndef GPR_PRINT_FORMAT_CHECK
	#ifdef __GNUC__
	#define GPR_PRINT_FORMAT_CHECK(FORMAT_STR, ARGS) \
	__attribute__((format(printf, FORMAT_STR, ARGS)))
	#else
	#define GPR_PRINT_FORMAT_CHECK(FORMAT_STR, ARGS)
	#endif
	#endif /* GPR_PRINT_FORMAT_CHECK */

	#if GPR_FORBID_UNREACHABLE_CODE
	#define GPR_UNREACHABLE_CODE(STATEMENT)
	#else
	#define GPR_UNREACHABLE_CODE(STATEMENT) \
	do { \
	gpr_log(GPR_ERROR, "Should never reach here."); \
	abort(); \
	STATEMENT; \
	} while (0)
	#endif /* GPR_FORBID_UNREACHABLE_CODE */

	#ifndef GPRAPI
	#define GPRAPI
	#endif

	#ifndef GRPCAPI
	#define GRPCAPI GPRAPI
	#endif

	#ifndef CENSUSAPI
	#define CENSUSAPI GRPCAPI
	#endif

	#ifndef GPR_ATTRIBUTE_NO_TSAN /* (1) */
	#if defined(__has_feature)
	#if __has_feature(thread_sanitizer)
	#define GPR_ATTRIBUTE_NO_TSAN __attribute__((no_sanitize("thread")))
	#endif /* __has_feature(thread_sanitizer) */
	#endif /* defined(__has_feature) */
	#ifndef GPR_ATTRIBUTE_NO_TSAN /* (2) */
	#define GPR_ATTRIBUTE_NO_TSAN
	#endif /* GPR_ATTRIBUTE_NO_TSAN (2) */
	#endif /* GPR_ATTRIBUTE_NO_TSAN (1) */

	/* GRPC_ALLOW_EXCEPTIONS should be 0 or 1 if exceptions are allowed or not */
	#ifndef GRPC_ALLOW_EXCEPTIONS
	/* If not already set, set to 1 on Windows (style guide standard) but to
	* 0 on non-Windows platforms unless the compiler defines __EXCEPTIONS */
	#ifdef GPR_WINDOWS
	#define GRPC_ALLOW_EXCEPTIONS 1
	#else /* GPR_WINDOWS */
	#ifdef __EXCEPTIONS
	#define GRPC_ALLOW_EXCEPTIONS 1
	#else /* __EXCEPTIONS */
	#define GRPC_ALLOW_EXCEPTIONS 0
	#endif /* __EXCEPTIONS */
	#endif /* __GPR_WINDOWS */
	#endif /* GRPC_ALLOW_EXCEPTIONS */

	/* Use GPR_LIKELY only in cases where you are sure that a certain outcome is the
	* most likely. Ideally, also collect performance numbers to justify the claim.
	*/
	#ifdef __GNUC__
	#define GPR_LIKELY(x) __builtin_expect((x), 1)
	#define GPR_UNLIKELY(x) __builtin_expect((x), 0)
	#else /* __GNUC__ */
	#define GPR_LIKELY(x) (x)
	#define GPR_UNLIKELY(x) (x)
	#endif /* __GNUC__ */

	#ifndef __STDC_FORMAT_MACROS
	#define __STDC_FORMAT_MACROS
	#endif

	#endif /* GRPC_IMPL_CODEGEN_PORT_PLATFORM_H */