Ticks.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / System.Runtime.DurableInstancing / System / Runtime / Ticks.cs / 1305376 / Ticks.cs
                        

                        
                            //---------------------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------------------

namespace System.Runtime 
{
    using System.Security; 
    using System.Runtime.Interop; 

    static class Ticks 
    {
        public static long Now
        {
            [Fx.Tag.SecurityNote(Miscellaneous = "Why isn't the SuppressUnmanagedCodeSecurity attribute working in this case?")] 
            [SecuritySafeCritical]
            get 
            { 
                long time;
#pragma warning disable 1634 
#pragma warning suppress 56523 // function has no error return value
#pragma warning restore 1634
                UnsafeNativeMethods.GetSystemTimeAsFileTime(out time);
                return time; 
            }
        } 
 
        public static long FromMilliseconds(int milliseconds)
        { 
            return checked((long)milliseconds * TimeSpan.TicksPerMillisecond);
        }

        public static int ToMilliseconds(long ticks) 
        {
            return checked((int)(ticks / TimeSpan.TicksPerMillisecond)); 
        } 

        public static long FromTimeSpan(TimeSpan duration) 
        {
            return duration.Ticks;
        }
 
        public static TimeSpan ToTimeSpan(long ticks)
        { 
            return new TimeSpan(ticks); 
        }
 
        public static long Add(long firstTicks, long secondTicks)
        {
            if (firstTicks == long.MaxValue || firstTicks == long.MinValue)
            { 
                return firstTicks;
            } 
            if (secondTicks == long.MaxValue || secondTicks == long.MinValue) 
            {
                return secondTicks; 
            }
            if (firstTicks >= 0 && long.MaxValue - firstTicks <= secondTicks)
            {
                return long.MaxValue - 1; 
            }
            if (firstTicks <= 0 && long.MinValue - firstTicks >= secondTicks) 
            { 
                return long.MinValue + 1;
            } 
            return checked(firstTicks + secondTicks);
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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