mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
|
//===----------------------------------------------------------------------===////
|
||
|
//
|
||
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===////
|
||
|
|
||
|
#ifndef TIMER_H
|
||
|
#define TIMER_H
|
||
|
|
||
|
// Define LIBCXXABI_USE_TIMER to enable testing with a timer.
|
||
|
#if defined(LIBCXXABI_USE_TIMER)
|
||
|
|
||
|
#include "third_party/libcxx/chrono"
|
||
|
#include "third_party/libcxx/cstdio"
|
||
|
|
||
|
class timer
|
||
|
{
|
||
|
typedef std::chrono::high_resolution_clock Clock;
|
||
|
typedef Clock::time_point TimePoint;
|
||
|
typedef std::chrono::microseconds MicroSeconds;
|
||
|
public:
|
||
|
timer() : m_start(Clock::now()) {}
|
||
|
|
||
|
timer(timer const &) = delete;
|
||
|
timer & operator=(timer const &) = delete;
|
||
|
|
||
|
~timer()
|
||
|
{
|
||
|
using std::chrono::duration_cast;
|
||
|
TimePoint end = Clock::now();
|
||
|
MicroSeconds us = duration_cast<MicroSeconds>(end - m_start);
|
||
|
std::printf("%d microseconds\n", us.count());
|
||
|
}
|
||
|
|
||
|
private:
|
||
|
TimePoint m_start;
|
||
|
};
|
||
|
|
||
|
#else /* LIBCXXABI_USE_TIMER */
|
||
|
|
||
|
class timer
|
||
|
{
|
||
|
public:
|
||
|
timer() {}
|
||
|
timer(timer const &) = delete;
|
||
|
timer & operator=(timer const &) = delete;
|
||
|
~timer() {}
|
||
|
};
|
||
|
|
||
|
#endif /* LIBCXXABI_USE_TIMER */
|
||
|
|
||
|
#endif /* TIMER_H */
|