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 
20 namespace lld {
21 
22 class Timer;
23 
24 struct ScopedTimer {
25   explicit ScopedTimer(Timer &t);
26 
27   ~ScopedTimer();
28 
29   void stop();
30 
31   std::chrono::time_point<std::chrono::high_resolution_clock> startTime;
32 
33   Timer *t = nullptr;
34 };
35 
36 class Timer {
37 public:
38   Timer(llvm::StringRef name, Timer &parent);
39 
40   static Timer &root();
41 
42   void addToTotal(std::chrono::nanoseconds time) { total += time.count(); }
43   void print();
44 
45   double millis() const;
46 
47 private:
48   explicit Timer(llvm::StringRef name);
49   void print(int depth, double totalDuration, bool recurse = true) const;
50 
51   std::atomic<std::chrono::nanoseconds::rep> total;
52   std::vector<Timer *> children;
53   std::string name;
54 };
55 
56 } // namespace lld
57 
58 #endif
59