infix_config.h

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#pragma once
// Define feature-test macros to ensure declarations for shm_open, ftruncate, etc.,
// are visible on all POSIX-compliant systems.
#if !defined(_POSIX_C_SOURCE)
#define _POSIX_C_SOURCE 200809L
#endif
#if (defined(__linux__) || defined(__gnu_linux__)) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
 
// Host Platform and Architecture Detection
// This block ALWAYS detects the native host. It is NOT overridden by the ABI flag.
#if defined(_WIN32)
#define INFIX_OS_WINDOWS
#include <windows.h>
#if defined(__MSYS__)
#define INFIX_ENV_MSYS 1
#elif defined(__CYGWIN__)
#define INFIX_ENV_CYGWIN 1
#define INFIX_ENV_POSIX 1
#elif defined(__MINGW32__) || defined(__MINGW64__)
#define INFIX_ENV_MINGW 1
#endif
#elif defined(__TERMUX__)
#define INFIX_OS_TERMUX
#define INFIX_OS_ANDROID  // Container
#define INFIX_OS_LINUX
#define INFIX_ENV_POSIX
#define INFIX_ENV_TERMUX 1
#elif defined(__ANDROID__)
#define INFIX_OS_ANDROID
#define INFIX_OS_LINUX  // Android is close enough...
#define INFIX_ENV_POSIX
#elif defined(__APPLE__)
#define INFIX_ENV_POSIX
#define _DARWIN_C_SOURCE
#include <TargetConditionals.h>
#include <libkern/OSCacheControl.h>
#include <pthread.h>
#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
#define INFIX_OS_IOS
#elif TARGET_OS_MAC
#define INFIX_OS_MACOS
#else
#error "Unsupported/unknown Apple platform"
#endif
#elif defined(__linux__)
#define INFIX_OS_LINUX
#define INFIX_ENV_POSIX
#elif defined(__FreeBSD__)
#define INFIX_OS_FREEBSD
#define INFIX_ENV_POSIX
#elif defined(__OpenBSD__)
#define INFIX_OS_OPENBSD
#define INFIX_ENV_POSIX
#elif defined(__NetBSD__)
#define INFIX_OS_NETBSD
#define INFIX_ENV_POSIX
#elif defined(__DragonFly__)
#define INFIX_OS_DRAGONFLY
#define INFIX_ENV_POSIX
#elif defined(__sun) && defined(__SVR4)
#define INFIX_OS_SOLARIS
#define INFIX_ENV_POSIX
#elif defined(__HAIKU__)
#define INFIX_OS_HAIKU
#define INFIX_ENV_POSIX
#else
#warning "Unsupported/unknown operating system"
#endif
 
#if defined(__clang__)
#define INFIX_COMPILER_CLANG
#elif defined(_MSC_VER)
#define INFIX_COMPILER_MSVC
#elif defined(__GNUC__)
#define INFIX_COMPILER_GCC
#else
#warning "Compiler: Unknown compiler detected."
#define INFIX_COMPILER_NFI
#endif
 
#if defined(__aarch64__) || defined(_M_ARM64)
#define INFIX_ARCH_AARCH64
#elif defined(__x86_64__) || defined(_M_X64)
#define INFIX_ARCH_X64
#else
#error "Unsupported architecture. Only x86-64 and AArch64 are currently supported."
#endif
 
/*
 * This block determines which ABI implementation to use. It can be overridden
 * by a compiler flag (e.g., -DINFIX_FORCE_ABI_WINDOWS_X64), which is useful for
 * cross-ABI testing and fuzzing on a single platform.
 */
#if defined(INFIX_FORCE_ABI_WINDOWS_X64)
#define INFIX_ABI_WINDOWS_X64 1
#define INFIX_ABI_FORCED 1
#elif defined(INFIX_FORCE_ABI_SYSV_X64)
#define INFIX_ABI_SYSV_X64 1
#define INFIX_ABI_FORCED 1
#elif defined(INFIX_FORCE_ABI_AAPCS64)
#define INFIX_ABI_AAPCS64 1
#define INFIX_ABI_FORCED 1
#endif
 
/*
 * If no ABI was forced via a compiler flag, detect it automatically based on
 * the host operating system and architecture.
 */
#ifndef INFIX_ABI_FORCED
#if defined(INFIX_ARCH_AARCH64)
#define INFIX_ABI_AAPCS64
#elif defined(INFIX_ARCH_X64)
#if defined(INFIX_OS_WINDOWS)
#define INFIX_ABI_WINDOWS_X64
#else
#define INFIX_ABI_SYSV_X64
#endif
#endif
#endif
 
/*
 * @internal
 * @brief The amount of extra headroom (in bytes) to add to a trampoline's
 *        internal arena. This provides a small buffer for metadata beyond the
 *        space needed for the deep-copied type graph.
 */
#define INFIX_TRAMPOLINE_HEADROOM 128