CPPUtil/UtilTimer.cpp

   1 //
   2 //  UtilTimer.cpp
   3 //  CPPUtil
   4 //
   5 //  Created by James McIlree on 10/9/13.
   6 //  Copyright (c) 2013 Apple. All rights reserved.
   7 //
   8
   9 #include "CPPUtil.h"
  10
  11 BEGIN_UTIL_NAMESPACE
  12
  13 static mach_timebase_info_data_t timebase_info;
  14
  15 Timer::Timer(const char* message) : _message(message) {
  16         // C++ guarantees that static variable initialization is thread safe.
  17         // We don't actually care what the returned value is, we just want to init timebase_info
  18         // The pragma prevents spurious warnings.
  19         static kern_return_t blah = mach_timebase_info(&timebase_info);
  20 #pragma unused(blah)
  21
  22         _start = AbsTime::now(); // Do this after the initialization check.
  23 }
  24
  25 Timer::~Timer()
  26 {
  27         _end = AbsTime::now();
  28         printf("%s: %5.5f seconds\n", _message.c_str(), (double)(_end - _start).nano_time().value() / (double)NANOSECONDS_PER_SECOND);
  29 }
  30
  31 END_UTIL_NAMESPACE