public RealTimeClock()
{
try
{
long filetime;
Os.GetSystemTimePreciseAsFileTime(out filetime);
IsHighResolution = true;
}
catch (EntryPointNotFoundException)
{
IsHighResolution = false;
}
}
/// <summary>
/// A garbage-free implementation of the <see cref="Socket.Poll"/> function (only providing read polling).
/// </summary>
/// <param name="socket">The socket to poll.</param>
/// <param name="descriptor">The socket descriptor.</param>
/// <param name="microseconds">The duration to wait.</param>
/// <returns>Whether there is data available to be read.</returns>
internal static bool Poll(this Socket socket, IntPtr[] descriptor, int microseconds)
{
if (microseconds == 0)
{
return(socket.Available != 0);
}
var tv = new Os.TimeValue {
Seconds = microseconds / 1000000, Microseconds = microseconds % 1000000
};
descriptor[0] = (IntPtr)1;
descriptor[1] = socket.Handle;
Os.select(0, descriptor, null, null, ref tv);
return((int)descriptor[0] != 0 && descriptor[1] == socket.Handle);
}