1//===- Timer.h ----------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLD_COMMON_TIMER_H
10#define LLD_COMMON_TIMER_H
11
12#include "llvm/ADT/DenseMap.h"
13#include "llvm/ADT/StringRef.h"
14#include <assert.h>
15#include <atomic>
16#include <chrono>
17#include <map>
18#include <memory>
19#include <vector>
20
21namespace lld {
22
23class Timer;
24
25struct ScopedTimer {
26  explicit ScopedTimer(Timer &t);
27
28  ~ScopedTimer();
29
30  void stop();
31
32  std::chrono::time_point<std::chrono::high_resolution_clock> startTime;
33
34  Timer *t = nullptr;
35};
36
37class Timer {
38public:
39  Timer(llvm::StringRef name, Timer &parent);
40
41  // Creates the root timer.
42  explicit Timer(llvm::StringRef name);
43
44  void addToTotal(std::chrono::nanoseconds time) { total += time.count(); }
45  void print();
46
47  double millis() const;
48
49private:
50  void print(int depth, double totalDuration, bool recurse = true) const;
51
52  std::atomic<std::chrono::nanoseconds::rep> total;
53  std::vector<Timer *> children;
54  std::string name;
55};
56
57} // namespace lld
58
59#endif
60