public IEnumerable <StatementSyntax> GenerateCleanupStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.Free))
{
yield break;
}
// <marshaller>.Free();
yield return(ExpressionStatement(
InvocationExpression(
MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(context.GetAdditionalIdentifier(info, MarshallerIdentifier)),
IdentifierName(ShapeMemberNames.Free)),
ArgumentList())));
}
public IEnumerable <StatementSyntax> GenerateCleanupStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.Free))
{
yield break;
}
// <marshallerType>.Free(<nativeIdentifier>);
yield return(ExpressionStatement(
InvocationExpression(
MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.Free)),
ArgumentList(SingletonSeparatedList(
Argument(IdentifierName(context.GetIdentifiers(info).native)))))));
}
public IEnumerable <StatementSyntax> GenerateMarshalStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.ToUnmanaged) && !_shape.HasFlag(MarshallerShape.CallerAllocatedBuffer))
{
yield break;
}
foreach (StatementSyntax statement in _innerMarshaller.GenerateMarshalStatements(info, context))
{
yield return(statement);
}
if (!info.IsByRef && info.ByValueContentsMarshalKind == ByValueContentsMarshalKind.Out)
{
yield return(GenerateByValueOutMarshalStatement(info, context));
yield break;
}
yield return(GenerateMarshalStatement(info, context));
}
public IEnumerable <StatementSyntax> GenerateGuaranteedUnmarshalStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.GuaranteedUnmarshal))
{
yield break;
}
(string managedIdentifier, string nativeIdentifier) = context.GetIdentifiers(info);
// <managedIdentifier> = <marshallerType>.ConvertToManagedFinally(<nativeIdentifier>);
yield return(ExpressionStatement(
AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
IdentifierName(managedIdentifier),
InvocationExpression(
MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.Value.Stateless.ConvertToManagedFinally)),
ArgumentList(SingletonSeparatedList(
Argument(IdentifierName(nativeIdentifier))))))));
}
public IEnumerable <StatementSyntax> GenerateGuaranteedUnmarshalStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.GuaranteedUnmarshal))
{
yield break;
}
(string managedIdentifier, string nativeIdentifier) = context.GetIdentifiers(info);
string numElementsIdentifier = MarshallerHelpers.GetNumElementsIdentifier(info, context);
yield return(ExpressionStatement(
AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
IdentifierName(numElementsIdentifier),
_numElementsExpression)));
// <managedIdentifier> = <marshallerType>.AllocateContainerForManagedElementsFinally(<nativeIdentifier>, <numElements>);
yield return(ExpressionStatement(
AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
IdentifierName(managedIdentifier),
InvocationExpression(
MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.LinearCollection.Stateless.AllocateContainerForManagedElementsFinally)),
ArgumentList(SeparatedList(new ArgumentSyntax[]
{
Argument(IdentifierName(nativeIdentifier)),
Argument(IdentifierName(numElementsIdentifier))
}))))));
}
public IEnumerable <StatementSyntax> GenerateMarshalStatements(TypePositionInfo info, StubCodeContext context)
{
if (!_shape.HasFlag(MarshallerShape.ToUnmanaged) && !_shape.HasFlag(MarshallerShape.CallerAllocatedBuffer))
{
yield break;
}
foreach (StatementSyntax statement in _innerMarshaller.GenerateMarshalStatements(info, context))
{
yield return(statement);
}
if (!info.IsByRef && info.ByValueContentsMarshalKind == ByValueContentsMarshalKind.Out)
{
yield return(GenerateByValueOutMarshalStatement(info, context));
yield break;
}
// ReadOnlySpan<T> <managedSpan> = <marshaller>.GetManagedValuesSource()
// Span<TUnmanagedElement> <nativeSpan> = <marshaller>.GetUnmanagedValuesDestination()
// << marshal contents >>
yield return(GenerateMarshalStatement(info, context));
}
public IEnumerable <StatementSyntax> GenerateMarshalStatements(TypePositionInfo info, StubCodeContext context, IEnumerable <ArgumentSyntax> nativeTypeConstructorArguments)
{
if (!_shape.HasFlag(MarshallerShape.ToUnmanaged))
{
yield break;
}
(string managedIdentifier, string nativeIdentifier) = context.GetIdentifiers(info);
string numElementsIdentifier = GetNumElementsIdentifier(info, context);
// <nativeIdentifier> = <marshallerType>.AllocateContainerForUnmanagedElements(<managedIdentifier>, out <numElements>);
yield return(ExpressionStatement(
AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
IdentifierName(nativeIdentifier),
InvocationExpression(
MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.LinearCollection.Stateless.AllocateContainerForUnmanagedElements)),
ArgumentList(SeparatedList(new ArgumentSyntax[]
{
Argument(IdentifierName(managedIdentifier)),
Argument(IdentifierName(numElementsIdentifier))
.WithRefOrOutKeyword(Token(SyntaxKind.OutKeyword))
}))))));
// <marshallerType>.GetUnmanagedValuesDestination(<nativeIdentifier>, <numElements>)
ExpressionSyntax destination =
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.LinearCollection.Stateless.GetUnmanagedValuesDestination)),
ArgumentList(SeparatedList(new ArgumentSyntax[]
{
Argument(IdentifierName(nativeIdentifier)),
Argument(IdentifierName(numElementsIdentifier)),
})));
if (!info.IsByRef && info.ByValueContentsMarshalKind == ByValueContentsMarshalKind.Out)
{
// If the parameter is marshalled by-value [Out], then we don't marshal the contents of the collection.
// We do clear the span, so that if the invoke target doesn't fill it, we aren't left with undefined content.
// <marshallerType>.GetUnmanagedValuesDestination(<nativeIdentifier>, <numElements>).Clear();
yield return(ExpressionStatement(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
destination,
IdentifierName("Clear")))));
yield break;
}
// Skip the cast if the managed and unmanaged element types are the same
if (!_unmanagedElementType.IsEquivalentTo(_managedElementType))
{
// MemoryMarshal.Cast<<unmanagedElementType>, <managedElementType>>(<destination>)
destination = InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
ParseTypeName(TypeNames.System_Runtime_InteropServices_MemoryMarshal),
GenericName(
Identifier("Cast"))
.WithTypeArgumentList(
TypeArgumentList(
SeparatedList(
new[]
{
_unmanagedElementType,
_managedElementType
})))),
ArgumentList(SingletonSeparatedList(
Argument(destination))));
}
// <marshallerType>.GetManagedValuesSource(<managedIdentifer>).CopyTo(<destination>);
yield return(ExpressionStatement(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
_marshallerTypeSyntax,
IdentifierName(ShapeMemberNames.LinearCollection.Stateless.GetManagedValuesSource)),
ArgumentList(SingletonSeparatedList(
Argument(IdentifierName(managedIdentifier))))),
IdentifierName("CopyTo")))
.AddArgumentListArguments(
Argument(destination))));
}