private DynamicMethod EmitEncode()
{
var dynamicMethod = new DynamicMethod("_encode_manual_" + type.FullName,
typeof(void), new[] { typeof(byte *).MakeByRefType(), type }, Assembly.GetExecutingAssembly().ManifestModule, true);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, false);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldind_I);
il.Emit(OpCodes.Stloc, locals.DataPointer);
emittingCodec.EmitEncode(il, locals, 1);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldloc, locals.DataPointer);
il.Emit(OpCodes.Stind_I);
il.Emit(OpCodes.Ret);
return(dynamicMethod);
}
private DynamicMethod EmitDecode(bool doNoCheckBounds)
{
var dynamicMethod = new DynamicMethod("_decode_manual_" + type.FullName + (doNoCheckBounds ? "_dncb_" : ""),
type, new[] { typeof(byte *).MakeByRefType(), typeof(int).MakeByRefType() }, Assembly.GetExecutingAssembly().ManifestModule, true);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, true);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldind_I);
il.Emit(OpCodes.Stloc, locals.DataPointer);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldind_I4);
il.Emit(OpCodes.Stloc, locals.RemainingBytes);
emittingCodec.EmitDecode(il, locals, doNoCheckBounds);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldloc, locals.DataPointer);
il.Emit(OpCodes.Stind_I);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldloc, locals.RemainingBytes);
il.Emit(OpCodes.Stind_I4);
il.Emit(OpCodes.Ret);
return(dynamicMethod);
}
private DynamicMethod EmitEncode()
{
var dynamicMethod = new DynamicMethod("_encode_manual_" + type.FullName,
typeof(void), new[] { typeof(byte*).MakeByRefType(), type }, Assembly.GetExecutingAssembly().ManifestModule, !forceVisibilityChecks);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, false);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldind_I);
il.Emit(OpCodes.Stloc, locals.DataPointer);
emittingCodec.EmitEncode(il, locals, 1);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldloc, locals.DataPointer);
il.Emit(OpCodes.Stind_I);
il.Emit(OpCodes.Ret);
return dynamicMethod;
}
private DynamicMethod EmitDecode(bool doNoCheckBounds)
{
var dynamicMethod = new DynamicMethod("_decode_manual_" + type.FullName + (doNoCheckBounds ? "_dncb_" : ""),
type, new[] { typeof(byte*).MakeByRefType(), typeof(int).MakeByRefType() }, Assembly.GetExecutingAssembly().ManifestModule, !forceVisibilityChecks);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, true);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldind_I);
il.Emit(OpCodes.Stloc, locals.DataPointer);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldind_I4);
il.Emit(OpCodes.Stloc, locals.RemainingBytes);
emittingCodec.EmitDecode(il, locals, doNoCheckBounds);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldloc, locals.DataPointer);
il.Emit(OpCodes.Stind_I);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldloc, locals.RemainingBytes);
il.Emit(OpCodes.Stind_I4);
il.Emit(OpCodes.Ret);
return dynamicMethod;
}
public ServiceMethodHandler CreateMethodHandler(ServiceImplementationInfo serviceImplementationInfo, ServicePath servicePath)
{
var serviceInterface = serviceImplementationInfo.Interface;
var dynamicMethod = new DynamicMethod(
"__srpc__handle__" + serviceInterface.FullName + "__" + string.Join("_", servicePath),
typeof(byte[]), ParameterTypes, Assembly.GetExecutingAssembly().ManifestModule);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, true);
il.Emit(OpCodes.Ldarg_0); // stack_0 = (TServiceImplementation) arg_0
il.Emit(OpCodes.Castclass, serviceInterface);
var serviceDesc = serviceImplementationInfo.Description;
for (int i = 1; i < servicePath.Length - 1; i++)
{
var propertyInfo = serviceDesc.Type.GetProperty(servicePath[i]);
il.Emit(OpCodes.Callvirt, propertyInfo.GetGetMethod()); // stack_0 = stack_0.Property
SubserviceDescription subserviceDescription;
if (!serviceDesc.TryGetSubservice(servicePath[i], out subserviceDescription))
throw new InvalidPathException();
serviceDesc = subserviceDescription.Service;
}
var methodName = servicePath.MethodName;
var methodInfo = serviceDesc.Type.GetMethod(methodName);
MethodDescription methodDesc;
if (!serviceDesc.TryGetMethod(methodName, out methodDesc))
throw new InvalidPathException();
bool hasRetval = methodDesc.ReturnType != typeof(void);
var parameters = methodDesc.Parameters.Select((x, i) => new ParameterNecessity
{
Description = x,
Codec = codecContainer.GetEmittingCodecFor(x.Type),
LocalVariable = x.Way != MethodParameterWay.Val ? il.DeclareLocal(x.Type) : null,
ArgumentIndex = i
})
.ToArray();
var requestParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Val || x.Description.Way == MethodParameterWay.Ref)
.ToArray();
var responseParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Ref || x.Description.Way == MethodParameterWay.Out)
.ToArray();
LocalBuilder requestDataPointerVar = null;
if (requestParameters.Any())
{
il.Emit(OpCodes.Ldarg_1); // remainingBytes = arg_1.Length
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Stloc, locals.RemainingBytes);
requestDataPointerVar = // var pinned dataPointer = pin(arg_1)
il.Emit_PinArray(typeof(byte), locals, 1);
il.Emit(OpCodes.Ldloc, requestDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
}
foreach (var parameter in parameters)
{
switch (parameter.Description.Way)
{
case MethodParameterWay.Val:
parameter.Codec.EmitDecode(il, locals, false); // stack_i = decode(data, remainingBytes, false)
break;
case MethodParameterWay.Ref:
parameter.Codec.EmitDecode(il, locals, false); // param_i = decode(data, remainingBytes, false)
il.Emit(OpCodes.Stloc, parameter.LocalVariable);
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
case MethodParameterWay.Out:
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (requestParameters.Any())
{
il.Emit_UnpinArray(requestDataPointerVar); // unpin(dataPointer)
}
il.Emit(OpCodes.Callvirt, methodInfo); // stack_0 = stack_0.Method(stack_1, stack_2, ...)
if (hasRetval || responseParameters.Any())
{
IEmittingCodec retvalCodec = null;
LocalBuilder retvalVar = null;
if (hasRetval)
{
retvalCodec = codecContainer.GetEmittingCodecFor(methodDesc.ReturnType);
retvalVar = il.DeclareLocal(methodDesc.ReturnType); // var ret = stack_0
il.Emit(OpCodes.Stloc, retvalVar);
retvalCodec.EmitCalculateSize(il, retvalVar); // stack_0 = calculateSize(ret)
}
bool hasSizeOnStack = hasRetval;
foreach (var parameter in responseParameters)
{
parameter.Codec.EmitCalculateSize(il, parameter.LocalVariable); // stack_0 += calculateSize(param_i)
if (hasSizeOnStack)
il.Emit(OpCodes.Add);
else
hasSizeOnStack = true;
}
var dataArrayVar = il.DeclareLocal(typeof(byte[])); // var dataArray = new byte[size of retval]
il.Emit(OpCodes.Newarr, typeof(byte));
il.Emit(OpCodes.Stloc, dataArrayVar);
var responseDataPointerVar = // var pinned dataPointer = pin(dataArrayVar)
il.Emit_PinArray(typeof(byte), locals, dataArrayVar);
il.Emit(OpCodes.Ldloc, responseDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
foreach (var parameter in responseParameters)
parameter.Codec.EmitEncode(il, locals, parameter.LocalVariable);// encode(data, param_i)
if (hasRetval)
retvalCodec.EmitEncode(il, locals, retvalVar); // encode(data, ret)
il.Emit_UnpinArray(responseDataPointerVar); // unpin(dataPointer)
il.Emit(OpCodes.Ldloc, dataArrayVar); // stack_0 = dataArray
}
else
{
il.Emit(OpCodes.Ldc_I4, 0); // stack_0 = new byte[0]
il.Emit(OpCodes.Newarr, typeof(byte));
}
il.Emit(OpCodes.Ret);
return (ServiceMethodHandler)dynamicMethod.CreateDelegate(typeof(ServiceMethodHandler));
}
