third_party/qcms/src/tests/timing.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the Chromium LICENSE file.
   4
   5 #ifndef TESTS_TIMING_H
   6 #define TESTS_TIMING_H
   7
   8 #include <assert.h>
   9 #if defined(_WIN32)
  10 #include <windows.h>
  11 #else
  12 #include <sys/time.h>
  13 #endif
  14 #include <time.h>
  15
  16 #if defined(_WIN32)
  17
  18 static double seconds()
  19 {
  20     static double clock_frequency;
  21     static bool have_frequency;
  22
  23     LARGE_INTEGER qpc;
  24     QueryPerformanceCounter(&qpc);
  25     if (have_frequency)
  26         return qpc.QuadPart * clock_frequency;
  27
  28     have_frequency = true;
  29     QueryPerformanceFrequency(&qpc);
  30     clock_frequency = 1.0 / (double) qpc.QuadPart;
  31     return seconds();
  32 }
  33
  34 #else
  35
  36 static double seconds()
  37 {
  38     struct timeval now;
  39     gettimeofday(&now, 0);
  40     return now.tv_sec + now.tv_usec * (1.0 / 1000000.0);
  41 }
  42
  43 #endif
  44
  45 #define TIME(function, time) do {  \
  46     double start = seconds();      \
  47     (function);                    \
  48     *time += seconds() - start;    \
  49 } while (0)
  50
  51 #endif // TESTS_TIMING_H