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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#ifdef __i386__
# define AK_ARCH_I386 1
#endif
#ifdef __x86_64__
# define AK_ARCH_X86_64 1
#endif
#if defined(__APPLE__) && defined(__MACH__)
# define AK_OS_MACOS
# define AK_OS_BSD_GENERIC
#endif
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
# define AK_OS_BSD_GENERIC
#endif
#define ARCH(arch) (defined(AK_ARCH_##arch) && AK_ARCH_##arch)
#ifdef ALWAYS_INLINE
# undef ALWAYS_INLINE
#endif
#define ALWAYS_INLINE [[gnu::always_inline]] inline
#ifdef NEVER_INLINE
# undef NEVER_INLINE
#endif
#define NEVER_INLINE [[gnu::noinline]]
#ifdef FLATTEN
# undef FLATTEN
#endif
#define FLATTEN [[gnu::flatten]]
#ifndef __serenity__
# include <unistd.h>
# define PAGE_SIZE sysconf(_SC_PAGESIZE)
#endif
ALWAYS_INLINE int count_trailing_zeroes_32(unsigned int val)
{
#if defined(__GNUC__) || defined(__clang__)
return __builtin_ctz(val);
#else
for (u8 i = 0; i < 32; ++i) {
if ((val >> i) & 1) {
return i;
}
}
return 0;
#endif
}
ALWAYS_INLINE int count_trailing_zeroes_32_safe(unsigned int val)
{
if (val == 0)
return 32;
return count_trailing_zeroes_32(val);
}
#ifdef AK_OS_BSD_GENERIC
# define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
# define CLOCK_REALTIME_COARSE CLOCK_REALTIME
#endif
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