llvm/unittests/Support/TimerTest.cpp

   1 //===- unittests/TimerTest.cpp - Timer tests ------------------------------===//
   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 #include "llvm/Support/Timer.h"
  10 #include "gtest/gtest.h"
  11
  12 #if _WIN32
  13 #include <windows.h>
  14 #else
  15 #include <time.h>
  16 #endif
  17
  18 using namespace llvm;
  19
  20 namespace {
  21
  22 // FIXME: Put this somewhere in Support, it's also used in LockFileManager.
  23 void SleepMS() {
  24 #if _WIN32
  25   Sleep(1);
  26 #else
  27   struct timespec Interval;
  28   Interval.tv_sec = 0;
  29   Interval.tv_nsec = 1000000;
  30 #if defined(__MVS__)
  31   long Microseconds = (Interval.tv_nsec + 999) / 1000;
  32   usleep(Microseconds);
  33 #else
  34   nanosleep(&Interval, nullptr);
  35 #endif
  36 #endif
  37 }
  38
  39 TEST(Timer, Additivity) {
  40   Timer T1("T1", "T1");
  41
  42   EXPECT_TRUE(T1.isInitialized());
  43
  44   T1.startTimer();
  45   T1.stopTimer();
  46   auto TR1 = T1.getTotalTime();
  47
  48   T1.startTimer();
  49   SleepMS();
  50   T1.stopTimer();
  51   auto TR2 = T1.getTotalTime();
  52
  53   EXPECT_LT(TR1, TR2);
  54 }
  55
  56 TEST(Timer, CheckIfTriggered) {
  57   Timer T1("T1", "T1");
  58
  59   EXPECT_FALSE(T1.hasTriggered());
  60   T1.startTimer();
  61   EXPECT_TRUE(T1.hasTriggered());
  62   T1.stopTimer();
  63   EXPECT_TRUE(T1.hasTriggered());
  64
  65   T1.clear();
  66   EXPECT_FALSE(T1.hasTriggered());
  67 }
  68
  69 } // end anon namespace