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platform.h
/*
* Copyright (C) 2015-2020 Mateusz Łącki and Michał Startek.
*
* This file is part of IsoSpec.
*
* IsoSpec is free software: you can redistribute it and/or modify
* it under the terms of the Simplified ("2-clause") BSD licence.
*
* IsoSpec is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the Simplified BSD Licence
* along with IsoSpec. If not, see <https://opensource.org/licenses/BSD-2-Clause>.
*/
#pragma once
#include "platform_incl.h"
#if defined(__unix__) || defined(__unix) || \
(defined(__APPLE__) && defined(__MACH__))
#define ISOSPEC_TEST_WE_ARE_ON_UNIX_YAY true
#define ISOSPEC_TEST_WE_ARE_ON_WINDOWS false /* CYGWIN doesn't really count as Windows for our purposes, we'll be using UNIX API anyway */
#define ISOSPEC_TEST_GOT_SYSTEM_MMAN true
#define ISOSPEC_TEST_GOT_MMAN true
#elif defined(__MINGW32__) || defined(_WIN32)
#define ISOSPEC_TEST_WE_ARE_ON_UNIX_YAY false
#define ISOSPEC_TEST_WE_ARE_ON_WINDOWS true
#define ISOSPEC_TEST_GOT_SYSTEM_MMAN false
#define ISOSPEC_TEST_GOT_MMAN true
#else
#define ISOSPEC_TEST_WE_ARE_ON_UNIX_YAY false /* Well, probably... */
#define ISOSPEC_TEST_WE_ARE_ON_WINDOWS false
#define ISOSPEC_TEST_GOT_SYSTEM_MMAN false
#define ISOSPEC_TEST_GOT_MMAN false
#endif
#if !defined(ISOSPEC_WE_ARE_ON_UNIX_YAY)
#define ISOSPEC_WE_ARE_ON_UNIX_YAY ISOSPEC_TEST_WE_ARE_ON_UNIX_YAY
#endif
#if !defined(ISOSPEC_WE_ARE_ON_WINDOWS)
#define ISOSPEC_WE_ARE_ON_WINDOWS ISOSPEC_TEST_WE_ARE_ON_WINDOWS
#endif
#if !defined(ISOSPEC_GOT_SYSTEM_MMAN)
#define ISOSPEC_GOT_SYSTEM_MMAN ISOSPEC_TEST_GOT_SYSTEM_MMAN
#endif
#if !defined(ISOSPEC_GOT_MMAN)
#define ISOSPEC_GOT_MMAN ISOSPEC_TEST_GOT_MMAN
#endif
// Note: __GNUC__ is defined by clang and gcc
#ifdef __GNUC__
#define ISOSPEC_IMPOSSIBLE(condition) if(condition) __builtin_unreachable();
#define ISOSPEC_LIKELY(condition) __builtin_expect(static_cast<bool>(condition), 1)
#define ISOSPEC_UNLIKELY(condition) __builtin_expect(static_cast<bool>(condition), 0)
// For aggressive inlining
#define ISOSPEC_FORCE_INLINE __attribute__ ((always_inline)) inline
#elif defined _MSC_VER
#define ISOSPEC_IMPOSSIBLE(condition) __assume(!(condition));
#define ISOSPEC_LIKELY(condition) condition
#define ISOSPEC_UNLIKELY(condition) condition
#define ISOSPEC_FORCE_INLINE __forceinline
#else
#define ISOSPEC_IMPOSSIBLE(condition)
#define ISOSPEC_LIKELY(condition) condition
#define ISOSPEC_UNLIKELY(condition) condition
#define ISOSPEC_FORCE_INLINE inline
#endif
#ifdef ISOSPEC_DEBUG
#undef ISOSPEC_IMPOSSIBLE
#include <cassert>
#define ISOSPEC_IMPOSSIBLE(condition) assert(!(condition));
#endif /* ISOSPEC_DEBUG */
#if ISOSPEC_GOT_MMAN
#if ISOSPEC_GOT_SYSTEM_MMAN
#include <sys/mman.h>
#else
#include "mman.h"
#endif
#else
#include <stdlib.h> /* malloc, free, rand */
#endif
#if defined(OPENMS_DLLAPI) /* IsoSpec is being built as a part of OpenMS: use their visibility macros */
#define ISOSPEC_EXPORT_SYMBOL OPENMS_DLLAPI
#else /* it's a can of worms we don't yet want to open ourselves though... */
#define ISOSPEC_EXPORT_SYMBOL
#endif
#if defined(_WIN32) || defined(_WIN64)
#define ISOSPEC_C_API __declspec(dllexport)
#else
#define ISOSPEC_C_API
#endif
#if !defined(__cpp_if_constexpr)
#define constexpr_if if
#define ISOSPEC_MAYBE_UNUSED
#else
#define constexpr_if if constexpr
#define ISOSPEC_MAYBE_UNUSED [[maybe_unused]]
#endif