counter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / xsp / System / Web / Util / counter.cs / 1 / counter.cs
                        

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

namespace System.Web.Util { 
    using System; 
    using System.Web;
    using System.Runtime.InteropServices; 


    /// 
    ///    Provides access to system timers. 
    /// 
    internal sealed class Counter { 
 
        /// 
        ///     not creatable 
        /// 
        private Counter() {
        }
 

#if UNUSED_CODE 
        internal static float Time(long start) { 
            long time = Value - start;
            return time / (float)Frequency; 
        }
#endif

 
        /// 
        ///    Gets the current system counter value. 
        ///  
        internal static long Value {
            get { 
                long count = 0;
                SafeNativeMethods.QueryPerformanceCounter(ref count);
                return count;
            } 
        }
 
 
        /// 
        ///    Gets the frequency of the system counter in counts per second. 
        /// 
        internal static long Frequency {
            get {
                long freq = 0; 
                SafeNativeMethods.QueryPerformanceFrequency(ref freq);
                return freq; 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.Util { 
    using System; 
    using System.Web;
    using System.Runtime.InteropServices; 


    /// 
    ///    Provides access to system timers. 
    /// 
    internal sealed class Counter { 
 
        /// 
        ///     not creatable 
        /// 
        private Counter() {
        }
 

#if UNUSED_CODE 
        internal static float Time(long start) { 
            long time = Value - start;
            return time / (float)Frequency; 
        }
#endif

 
        /// 
        ///    Gets the current system counter value. 
        ///  
        internal static long Value {
            get { 
                long count = 0;
                SafeNativeMethods.QueryPerformanceCounter(ref count);
                return count;
            } 
        }
 
 
        /// 
        ///    Gets the frequency of the system counter in counts per second. 
        /// 
        internal static long Frequency {
            get {
                long freq = 0; 
                SafeNativeMethods.QueryPerformanceFrequency(ref freq);
                return freq; 
            } 
        }
    } 
}

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

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