DynamicMethodHelper R2 2012-08-14 DynamicMethod ILGenerator.Emit
namespace ConsoleApplication
{
using System;
using System.Diagnostics;
using Microshaoft;
/// <summary>
/// Class1 的摘要说明。
/// </summary>
public class Class1
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
//[STAThread]
static void Main(string[] args)
{
Person person = new Person();
string word = "hello";
Person p = null;
object[] param = new object[] { word, p, 3 };
Stopwatch watch1 = new Stopwatch();
//FastInvokeHandler fastInvoker = DynamicMethodHelper.GetDynamicMethodInvoker(methodInfo);
Person x = null;
int y = -1;
DynamicMethodHelper.DynamicMethodFuncInvokeHandler handler1 =
DynamicMethodHelper.GetDynamicMethodFuncInvoker
(
person
, (mi) =>
{
return !mi.IsStatic && mi.Name.Equals("Say");
}
);
DynamicMethodHelper.DynamicMethodFuncInvokeHandler handler2 =
DynamicMethodHelper.GetDynamicMethodFuncInvoker<Person>
(
mi =>
{
return mi.IsStatic && mi.Name.Equals("Say");
}
);//.Invoke(person, new object[] { "hihi" });
CodeTimer.Time
(
"串行测试"
, 1
, () =>
{
var parameters = new object[] { "aaa", x, y };
handler1.DynamicInvoke(person, parameters);
Console.WriteLine("实例方法 Say Invoke ref word: {0}, int avi {1}", parameters[0], parameters[2]);
handler1.Invoke(person, parameters);
Console.WriteLine("实例方法 Say Invoke ref word: {0}, int avi {1}", parameters[0], parameters[2]);
string s = (string)handler2.DynamicInvoke(person, new object[] { "bb", x, y });
Console.WriteLine("静态方法 Say DynamicInvoke return: {0}", s);
s = (string)handler2.Invoke(person, new object[] { "bb", x, y });
Console.WriteLine("静态方法 Say Invoke return: {0}", s);
}
);
CodeTimer.ParallelTime
(
"并行测试"
, 1
, () =>
{
var parameters = new object[] { "aaa", x, y };
handler1.DynamicInvoke(person, parameters);
Console.WriteLine("实例方法 Say Invoke ref word: {0}, int avi {1}", parameters[0], parameters[2]);
handler1.Invoke(person, parameters);
Console.WriteLine("实例方法 Say Invoke ref word: {0}, int avi {1}", parameters[0], parameters[2]);
string s = (string)handler2.DynamicInvoke(person, new object[] { "bb", x, y });
Console.WriteLine("静态方法 Say DynamicInvoke return: {0}", s);
s = (string)handler2.Invoke(person, new object[] { "bb", x, y });
Console.WriteLine("静态方法 Say Invoke return: {0}", s);
}
);
Console.ReadLine();
}
}
public class Person
{
public void Say(ref string word, out Person p, int avi)
{
word = "instance " + avi.ToString();
//Console.WriteLine(word);
p = new Person();
//return 100;
}
public static string Say(string word)
{
//Console.WriteLine("Static Say");
return "return static " + word;
}
}
}
namespace Microshaoft
{
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
public static class CodeTimer
{
public static void Initialize()
{
Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;
Thread.CurrentThread.Priority = ThreadPriority.Highest;
Time("", 1, () => { });
}
public static void ParallelTime(string name, int iteration, Action action)
{
InternalIterationProcess
(
name
, iteration
, () =>
{
Parallel.For
(
0
, iteration
, new ParallelOptions()
{
MaxDegreeOfParallelism = 4,
TaskScheduler = null
}
, i =>
{
action();
}
);
}
);
}
private static void InternalIterationProcess(string name, int iteration, Action action)
{
if (string.IsNullOrEmpty(name))
{
return;
}
// 1.
ConsoleColor currentForeColor = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine(name);
// 2.
GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced);
int[] gcCounts = new int[GC.MaxGeneration + 1];
for (int i = 0; i <= GC.MaxGeneration; i++)
{
gcCounts[i] = GC.CollectionCount(i);
}
// 3.
Stopwatch watch = new Stopwatch();
watch.Start();
ulong cycleCount = GetCycleCount();
action();
ulong cpuCycles = GetCycleCount() - cycleCount;
watch.Stop();
// 4.
Console.ForegroundColor = currentForeColor;
Console.WriteLine("\tTime Elapsed:\t" + watch.ElapsedMilliseconds.ToString("N0") + "ms");
Console.WriteLine("\tCPU Cycles:\t" + cpuCycles.ToString("N0"));
// 5.
for (int i = 0; i <= GC.MaxGeneration; i++)
{
int count = GC.CollectionCount(i) - gcCounts[i];
Console.WriteLine("\tGen " + i + ": \t\t" + count);
}
Console.WriteLine();
}
public static void Time(string name, int iteration, Action action)
{
InternalIterationProcess
(
name
, iteration
, () =>
{
for (int i = 0; i < iteration; i++)
{
action();
}
}
);
}
private static ulong GetCycleCount()
{
ulong cycleCount = 0;
QueryThreadCycleTime(GetCurrentThread(), ref cycleCount);
return cycleCount;
}
[DllImport("kernel32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool QueryThreadCycleTime(IntPtr threadHandle, ref ulong cycleTime);
[DllImport("kernel32.dll")]
static extern IntPtr GetCurrentThread();
}
}
namespace Microshaoft
{
using System;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
public class DynamicMethodHelper
{
public delegate object DynamicMethodFuncInvokeHandler(object target, object[] parameters);
public static DynamicMethodFuncInvokeHandler GetDynamicMethodFuncInvoker(string typeName, Func<MethodInfo, bool> predicateFunc)
{
MethodInfo methodInfo = Type.GetType(typeName).GetMethods().First
(
mi =>
{
return predicateFunc(mi);
}
);
DynamicMethod dynamicMethod = GetDynamicMethod(methodInfo);
return (DynamicMethodFuncInvokeHandler) dynamicMethod.CreateDelegate(typeof(DynamicMethodFuncInvokeHandler));
}
public static DynamicMethodFuncInvokeHandler GetDynamicMethodFuncInvoker<TTarget>(Func<MethodInfo, bool> predicateFunc)
{
MethodInfo methodInfo = typeof(TTarget).GetMethods().First
(
mi =>
{
return predicateFunc(mi);
}
);
DynamicMethod dynamicMethod = GetDynamicMethod(methodInfo);
return (DynamicMethodFuncInvokeHandler) dynamicMethod.CreateDelegate(typeof(DynamicMethodFuncInvokeHandler));
}
public static DynamicMethodFuncInvokeHandler GetDynamicMethodFuncInvoker(object target, Func<MethodInfo, bool> predicateFunc)
{
MethodInfo methodInfo = target.GetType().GetMethods().First
(
mi =>
{
return predicateFunc(mi);
}
);
DynamicMethod dynamicMethod = GetDynamicMethod(methodInfo);
return (DynamicMethodFuncInvokeHandler)dynamicMethod.CreateDelegate(typeof(DynamicMethodFuncInvokeHandler));
}
private static DynamicMethod GetDynamicMethod(MethodInfo methodInfo)
{
int i = 0;
var parametersInfos = methodInfo.GetParameters();
DynamicMethod dynamicMethod = new DynamicMethod
(
string.Empty
, typeof(object)
, new Type[]
{
typeof(object)
, typeof(object[])
}
, methodInfo.DeclaringType.Module
);
ILGenerator ilg = dynamicMethod.GetILGenerator();
if (!methodInfo.IsStatic)
{
ilg.Emit(OpCodes.Ldarg_0);
}
i = 0;
Array.ForEach
(
parametersInfos
, (pi) =>
{
Type pt;
if (pi.ParameterType.IsByRef)
{
pt = pi.ParameterType.GetElementType();
}
else
{
pt = pi.ParameterType;
}
//paramTypes[i] = pt;
LocalBuilder lb = ilg.DeclareLocal(pt, true);
ilg.Emit(OpCodes.Ldarg_1);
EmitFastInt(ilg, i);
ilg.Emit(OpCodes.Ldelem_Ref);
EmitCastToReference(ilg, pt);
ilg.Emit(OpCodes.Stloc, lb);
if (pi.ParameterType.IsByRef)
{
ilg.Emit(OpCodes.Ldloca_S, lb);
ilg.Emit(OpCodes.Ldarg_1);
EmitFastInt(ilg, i);
ilg.Emit(OpCodes.Ldloc, lb);
if (lb.LocalType.IsValueType)
{
ilg.Emit(OpCodes.Box, lb.LocalType);
}
ilg.Emit(OpCodes.Stelem_Ref);
}
else
{
ilg.Emit(OpCodes.Ldloc, lb);
}
i++;
}
);
if (methodInfo.IsStatic)
{
ilg.EmitCall(OpCodes.Call, methodInfo, null);
}
else
{
ilg.EmitCall(OpCodes.Callvirt, methodInfo, null);
}
if (methodInfo.ReturnType == typeof(void))
{
ilg.Emit(OpCodes.Ldnull);
}
else
{
EmitBoxIfNeeded(ilg, methodInfo.ReturnType);
}
ilg.Emit(OpCodes.Ret);
return dynamicMethod;
}
private static void EmitCastToReference(ILGenerator ilg, Type type)
{
if (type.IsValueType)
{
ilg.Emit(OpCodes.Unbox_Any, type);
}
else
{
ilg.Emit(OpCodes.Castclass, type);
}
}
private static void EmitBoxIfNeeded(ILGenerator ilg, Type type)
{
if (type.IsValueType)
{
ilg.Emit(OpCodes.Box, type);
}
}
private static void EmitFastInt(ILGenerator il, int value)
{
switch (value)
{
case -1:
il.Emit(OpCodes.Ldc_I4_M1);
return;
case 0:
il.Emit(OpCodes.Ldc_I4_0);
return;
case 1:
il.Emit(OpCodes.Ldc_I4_1);
return;
case 2:
il.Emit(OpCodes.Ldc_I4_2);
return;
case 3:
il.Emit(OpCodes.Ldc_I4_3);
return;
case 4:
il.Emit(OpCodes.Ldc_I4_4);
return;
case 5:
il.Emit(OpCodes.Ldc_I4_5);
return;
case 6:
il.Emit(OpCodes.Ldc_I4_6);
return;
case 7:
il.Emit(OpCodes.Ldc_I4_7);
return;
case 8:
il.Emit(OpCodes.Ldc_I4_8);
return;
}
if (value > -129 && value < 128)
{
il.Emit(OpCodes.Ldc_I4_S, (SByte)value);
}
else
{
il.Emit(OpCodes.Ldc_I4, value);
}
}
}
}
|
