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construct/include/ircd/portable.h
2023-01-15 22:32:00 -08:00

115 lines
2.2 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
//
// Portability Macros & Developer Tools
//
#pragma once
#define HAVE_IRCD_PORTABLE_H
//
// For non-clang
//
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#ifndef __is_identifier
#define __is_identifier(x) 0
#endif
//
// Common branch prediction macros
//
#if !defined(likely)
#if __has_builtin(__builtin_expect)
#define likely(x) __builtin_expect(!!(x), 1)
#else
#define likely(x) (x)
#endif
#endif
#if !defined(unlikely)
#if __has_builtin(__builtin_expect)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define unlikely(x) (x)
#endif
#endif
#if !defined(unpredictable)
#if __has_builtin(__builtin_unpredictable)
#define unpredictable(x) __builtin_unpredictable(!!(x), 0)
#else
#define unpredictable(x) (x)
#endif
#endif
//
// Assume
//
#if !defined(assume)
#if __has_builtin(__builtin_assume)
#define assume(x) assert(x); __builtin_assume(x);
#else
#define assume(x) assert(x);
#endif
#endif
//
// 128 bit integer support
//
#if defined(__cplusplus) && (!defined(HAVE_INT128_T) || !defined(HAVE_UINT128_T))
namespace ircd
{
#if defined(HAVE___INT128_T) && defined(HAVE__UINT128_T)
using int128_t = __int128_t;
using uint128_t = __uint128_t;
#elif defined(HAVE___INT128)
using int128_t = signed __int128;
using uint128_t = unsigned __int128;
#else
#error "Missing 128 bit integer types on this platform."
#endif
}
#endif
//
// Other convenience typedefs
//
#if defined(__cplusplus)
namespace ircd
{
using longlong = long long;
using ulonglong = unsigned long long;
}
#endif
//
// OpenCL compat
//
#if !defined(uchar)
typedef unsigned char uchar;
#endif
//
// Trouble; FreeBSD unsigned long ctype
//
#if defined(__FreeBSD__) && !defined(ulong)
typedef u_long ulong;
#endif