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
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
| //===-- Timer.h -------------------------------------------------*- 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 liblldb_Timer_h_
#define liblldb_Timer_h_
#include "lldb/lldb-defines.h"
#include "llvm/Support/Chrono.h"
#include <atomic>
#include <stdint.h>
namespace lldb_private {
class Stream;
/// \class Timer Timer.h "lldb/Utility/Timer.h"
/// A timer class that simplifies common timing metrics.
class Timer {
public:
class Category {
public:
explicit Category(const char *category_name);
private:
friend class Timer;
const char *m_name;
std::atomic<uint64_t> m_nanos;
std::atomic<uint64_t> m_nanos_total;
std::atomic<uint64_t> m_count;
std::atomic<Category *> m_next;
DISALLOW_COPY_AND_ASSIGN(Category);
};
/// Default constructor.
Timer(Category &category, const char *format, ...)
__attribute__((format(printf, 3, 4)));
/// Destructor
~Timer();
void Dump();
static void SetDisplayDepth(uint32_t depth);
static void SetQuiet(bool value);
static void DumpCategoryTimes(Stream *s);
static void ResetCategoryTimes();
protected:
using TimePoint = std::chrono::steady_clock::time_point;
void ChildDuration(TimePoint::duration dur) { m_child_duration += dur; }
Category &m_category;
TimePoint m_total_start;
TimePoint::duration m_child_duration{0};
static std::atomic<bool> g_quiet;
static std::atomic<unsigned> g_display_depth;
private:
DISALLOW_COPY_AND_ASSIGN(Timer);
};
} // namespace lldb_private
#endif // liblldb_Timer_h_
|