1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
//===----------------------------------------------------------------------===////
//
// 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_NO_TIMER to disable testing with a timer.
#ifndef LIBCXXABI_NO_TIMER
#include <chrono>
#include <iostream>
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::cout << us.count() << " microseconds\n";
}
private:
TimePoint m_start;
};
#else /* LIBCXXABI_NO_TIMER */
class timer
{
public:
timer() {}
timer(timer const &) = delete;
timer & operator=(timer const &) = delete;
~timer() {}
};
#endif /* LIBCXXABI_NO_TIMER */
#endif /* TIMER_H */
|
