// The Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 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.

#pragma once
#define HAVE_IRCD_PROF_CYCLES_H

namespace ircd::prof
{
	uint64_t cycles() noexcept;
}

namespace ircd
{
	using prof::cycles;
}

#if defined(__x86_64__) || defined(__i386__)
/// Monotonic reference cycles (since system boot)
extern inline uint64_t
__attribute__((flatten, always_inline, gnu_inline, artificial))
ircd::prof::cycles()
noexcept
{
	return x86::rdtsc();
}
#else
ircd::prof::cycles()
noexcept
{
	static_assert(false, "Select reference cycle counter for platform.");
	return 0;
}
#endif