private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
MetadataType stubHelpersType = InteropTypes.GetStubHelpers(context);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
if (!MarshalHelpers.IsRuntimeMarshallingEnabled(((MetadataType)_targetMethod.OwningType).Module))
{
// When runtime marshalling is disabled, we don't support generating the stub IL
// in Ready-to-Run so we can correctly throw an exception at runtime when the user tries to
// use SetLastError=true when marshalling is disabled.
throw new NotSupportedException();
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags, 0, nativeReturnType,
nativeParameterTypes);
var rawTargetMethod = new PInvokeTargetNativeMethod(_targetMethod, nativeSig);
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(rawTargetMethod));
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.SaveLastError
// so that last error can be used later by calling Marshal.GetLastPInvokeError
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("SetLastError", null)));
}
}
private void EmitPInvokeCall(PInvokeILCodeStreams ilCodeStreams)
{
ILEmitter emitter = ilCodeStreams.Emitter;
ILCodeStream callsiteSetupCodeStream = ilCodeStreams.CallsiteSetupCodeStream;
TypeSystemContext context = _targetMethod.Context;
TypeDesc nativeReturnType = _marshallers[0].NativeParameterType;
TypeDesc[] nativeParameterTypes = new TypeDesc[_marshallers.Length - 1];
MetadataType stubHelpersType = InteropTypes.GetStubHelpers(context);
// if the SetLastError flag is set in DllImport, clear the error code before doing P/Invoke
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("ClearLastError", null)));
}
for (int i = 1; i < _marshallers.Length; i++)
{
nativeParameterTypes[i - 1] = _marshallers[i].NativeParameterType;
}
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("GetStubContext", null)));
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("GetNDirectTarget", null)));
MethodSignatureFlags unmanagedCallConv = _importMetadata.Flags.UnmanagedCallingConvention;
MethodSignature nativeSig = new MethodSignature(
_targetMethod.Signature.Flags | unmanagedCallConv, 0, nativeReturnType,
nativeParameterTypes);
callsiteSetupCodeStream.Emit(ILOpcode.calli, emitter.NewToken(nativeSig));
// if the SetLastError flag is set in DllImport, call the PInvokeMarshal.
// SaveLastWin32Error so that last error can be used later by calling
// PInvokeMarshal.GetLastWin32Error
if (_importMetadata.Flags.SetLastError)
{
callsiteSetupCodeStream.Emit(ILOpcode.call, emitter.NewToken(
stubHelpersType.GetKnownMethod("SetLastError", null)));
}
}
