Use IConvertible for Const.

Author: allisterb

jemalloc.Api/GenericMath.cs

@@ -22,7 +22,7 @@ static GM()
         #endregion
 
         #region Methods
-        public static TData Const<TValue>(TValue v) where TValue : struct, IEquatable<TValue>, IComparable<TValue>
+        public static TData Const<TValue>(TValue v) where TValue : struct, IEquatable<TValue>, IComparable<TValue>, IConvertible
         {
             return (TData) Convert.ChangeType(v, typeof(TData));
         }
@@ -142,13 +142,13 @@ public static TData Random()
                 case UInt16 v:
                     return Const(checked((ushort)Rng.Next(0, UInt16.MaxValue)));
                 case Int64 v:
-                    return Const(checked((long)Rng.NextDouble() * Int64.MaxValue));
+                    return Const(checked((long)(Rng.NextDouble() * Int64.MaxValue)));
                 case UInt64 v:
-                    return Const(checked((ulong)Rng.NextDouble() * UInt64.MaxValue));
+                    return Const(checked((ulong)(Rng.NextDouble() * UInt64.MaxValue)));
                 case Single v:
-                    return Const(checked((Single)Rng.NextDouble() * Int64.MaxValue));
+                    return Const(checked(((Single)(Rng.NextDouble() * Int64.MaxValue))));
                 case Double v:
-                    return Const(checked((double)Rng.NextDouble() * Int64.MaxValue));
+                    return Const(checked((((double)Rng.NextDouble() * Int64.MaxValue))));
 
                 default:
                     throw new ArithmeticException();

jemalloc.Benchmarks/JemBenchmarkAttribute.cs

@@ -2,11 +2,14 @@
 using System.Collections.Generic;
 using System.Text;
 
+using BenchmarkDotNet.Configs;
+
 using BenchmarkDotNet.Attributes;
 
 namespace jemalloc.Benchmarks
 {
     public class JemBenchmarkAttribute : BenchmarkAttribute
     {
+        public static IConfig CurrentConfig { get; set; }
     }
 }

jemalloc.Cli/Program.cs

@@ -282,6 +282,7 @@ static void Benchmark<T>() where T : struct, IEquatable<T>, IComparable<T>, ICon
             Contract.Requires(BenchmarkOptions.ContainsKey("Sizes"));
             IConfig config = ManualConfig
                          .Create(DefaultConfig.Instance);
+            JemBenchmarkAttribute.CurrentConfig = config;
             try
             {
                 switch ((Category)BenchmarkOptions["Category"])