SpinWait

 

#define SPIN_FOR_1_SECOND_OR_UNTIL_TRUE(expression) /

    SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(base::TimeDelta::FromSeconds(1), /

                                     (expression))

 

#define SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(delta, expression) do { /

  base::Time start = base::Time::Now(); /

  const base::TimeDelta kTimeout = delta; /

    while(!(expression)) { /

      if (kTimeout < base::Time::Now() - start) { /

      EXPECT_LE((base::Time::Now() - start).InMilliseconds(), /

                kTimeout.InMilliseconds()) << "Timed out"; /

        break; /

      } /

      PlatformThread::Sleep(50); /

    } /

  } /

  while(0)