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//===-- Timer.h -------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_Timer_h_
#define liblldb_Timer_h_
#include "lldb/lldb-defines.h" // for DISALLOW_COPY_AND_ASSIGN
#include "llvm/Support/Chrono.h"
#include <atomic>
#include <stdint.h> // for uint32_t
namespace lldb_private {
class Stream;
}
namespace lldb_private {
//----------------------------------------------------------------------
/// @class Timer Timer.h "lldb/Core/Timer.h"
/// @brief A timer class that simplifies common timing metrics.
///
/// A scoped timer class that allows a variety of pthread mutex
/// objects to have a mutex locked when a Timer::Locker
/// object is created, and unlocked when it goes out of scope or
/// when the Timer::Locker::Reset(pthread_mutex_t *)
/// is called. This provides an exception safe way to lock a mutex
/// in a scope.
//----------------------------------------------------------------------
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<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_
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