private static TimestampGeneratorProperties PropertiesFromOptions(SamplesCounterClockOptions options)
{
if (options.HasFlag(SamplesCounterClockOptions.AdjustForOverflow))
{
if (options.HasFlag(SamplesCounterClockOptions.ForceMonotonic))
{
return(TimestampGeneratorProperties.Monotonic);
}
return(TimestampGeneratorProperties.None);
}
return(TimestampGeneratorProperties.Monotonic
| TimestampGeneratorProperties.UniformlyDistributed);
}
public const long MaximumNumberOfSamples = 9007199254740991; // 2^53 - 1
/// <summary>
/// Initializes a new instance of <see cref="SamplesCounterClock"/>.
/// </summary>
/// <param name="samplingRate">Acquired samples sampling rate.</param>
/// <param name="options">Options for this timestamp generator, these options also affect generator properties.</param>
/// <exception cref="ArgumentOutOfRangeException">
/// If <paramref name="samplingRate"/> is 0 or a negative number.
/// </exception>
/// <exception cref="HardwareException">
/// If requested sampling rate <paramref name="samplingRate"/> is too high for this timestamp generator
/// and required precision cannot be guaranteed. In this case inner <see cref="HardwareError"/> will
/// have class <see cref="HardwareErrorClass.Unsupported"/>.
/// </exception>
public SamplesCounterClock(double samplingRate, SamplesCounterClockOptions options)
: base(PropertiesFromOptions(options))
{
if (samplingRate <= 0)
{
throw new ArgumentOutOfRangeException("Sampling rate cannot be zero or negative.", "samplingRate");
}
_options = options;
unchecked
{
_ticksPerSample = TimeSpan.TicksPerSecond / samplingRate;
Error = Math.Floor(_ticksPerSample) - _ticksPerSample;
}
EnsureCounterHasEnoughPrecision();
}
