static UnmanagedMemory()
{
const string dynamicModuleName = nameof(UnmanagedMemory) + "DynamicMethods";
var module = AssemblyBuilder.DefineDynamicAssembly(
new AssemblyName(dynamicModuleName),
AssemblyBuilderAccess.RunAndCollect
)
.DefineDynamicModule(dynamicModuleName);
var dynClass = module.DefineType(
"DynamicMethods",
TypeAttributes.Public | TypeAttributes.Abstract | TypeAttributes.Sealed
);
var initBlock = dynClass.DefineMethod(
nameof(ZeroMemory),
MethodAttributes.Public | MethodAttributes.Static | MethodAttributes.Final,
CallingConventions.Standard,
typeof(void), new [] { typeof(IntPtr), typeof(uint) });
initBlock.SetImplementationFlags(MethodImplAttributes.AggressiveInlining);
{
var il = initBlock.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldc_I4_0);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Initblk);
il.Emit(OpCodes.Ret);
}
var createdClass = dynClass.CreateTypeInfo();
ZeroMemory = (ZeroMemoryDelegate)Delegate.CreateDelegate(typeof(ZeroMemoryDelegate), createdClass.GetDeclaredMethod(nameof(ZeroMemory)));
}
static Native()
{
var staticMethods = typeof(Buffer)
.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).ToArray();
var bufferMemCpyMethods = staticMethods
.Where(mi => mi.Name == "Memcpy").ToArray();
MemcpyFromUnmanaged =
(MemcpyFromUnmanagedDelegate)
Delegate.CreateDelegate(typeof(MemcpyFromUnmanagedDelegate), bufferMemCpyMethods.Single(mi =>
{
var parameters = mi.GetParameters();
return(parameters.Length == 5 && parameters[0].ParameterType == typeof(byte[]));
}));
MemcpyToUnmanaged =
(MemcpyToUnmanagedDelegate)
Delegate.CreateDelegate(typeof(MemcpyToUnmanagedDelegate), bufferMemCpyMethods.Single(mi =>
{
var parameters = mi.GetParameters();
return(parameters.Length == 5 && parameters[0].ParameterType == typeof(byte *));
}));
MemcpyUnmanaged =
(MemcpyUnmanagedDelegate)
Delegate.CreateDelegate(typeof(MemcpyUnmanagedDelegate),
bufferMemCpyMethods.Single(mi => mi.GetParameters().Length == 3));
ZeroMemory =
(ZeroMemoryDelegate)
Delegate.CreateDelegate(typeof(ZeroMemoryDelegate),
staticMethods.Single(mi => mi.Name == "ZeroMemory"));
GetSystemInfo(out Info);
}
static Native()
{
var staticMethods = typeof (Buffer)
.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).ToArray();
var bufferMemCpyMethods = staticMethods
.Where(mi => mi.Name == "Memcpy").ToArray();
MemcpyFromUnmanaged =
(MemcpyFromUnmanagedDelegate)
Delegate.CreateDelegate(typeof (MemcpyFromUnmanagedDelegate), bufferMemCpyMethods.Single(mi =>
{
var parameters = mi.GetParameters();
return parameters.Length == 5 && parameters[0].ParameterType == typeof (byte[]);
}));
MemcpyToUnmanaged =
(MemcpyToUnmanagedDelegate)
Delegate.CreateDelegate(typeof (MemcpyToUnmanagedDelegate), bufferMemCpyMethods.Single(mi =>
{
var parameters = mi.GetParameters();
return parameters.Length == 5 && parameters[0].ParameterType == typeof (byte*);
}));
MemcpyUnmanaged =
(MemcpyUnmanagedDelegate)
Delegate.CreateDelegate(typeof (MemcpyUnmanagedDelegate),
bufferMemCpyMethods.Single(mi => mi.GetParameters().Length == 3));
ZeroMemory =
(ZeroMemoryDelegate)
Delegate.CreateDelegate(typeof (ZeroMemoryDelegate),
staticMethods.Single(mi => mi.Name == "ZeroMemory"));
GetSystemInfo(out Info);
}
