mirror of
https://github.com/matrix-construct/construct
synced 2024-06-26 05:48:20 +02:00
41 lines
954 B
C++
41 lines
954 B
C++
// 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
|