public static void PinObjectMarshaller(ref IMarshalContext ctx, Action next)
{
for (var index = 0; index < ctx.ParameterVariables.Length; index++)
{
if (!ctx.TryGetAttribute(index, "Silk.NET.Core.Native.PinObjectAttribute", out var data))
{
continue;
}
var gcSlot = ctx.AllocateGcSlot();
PinMode pinMode;
if (data.ConstructorArguments.Length < 1)
{
pinMode = PinMode.Persist;
}
else
{
pinMode = (PinMode)(data.ConstructorArguments[0].Value ?? PinMode.Persist);
}
var name = pinMode switch
{
PinMode.Persist => "Pin",
PinMode.UntilNextCall => "PinUntilNextCall",
_ => throw new Exception()
};
var parameterVariable = ctx.ResolveVariable(ctx.ParameterVariables[index]);
ctx.AddSideEffect
(
ctx => ExpressionStatement
(
InvocationExpression
(
MemberAccessExpression
(SyntaxKind.SimpleMemberAccessExpression, ThisExpression(), IdentifierName(name)),
ArgumentList
(
SeparatedList
(
new[]
{
Argument(parameterVariable.Value),
Argument
(LiteralExpression(SyntaxKind.NumericLiteralExpression, Literal(gcSlot)))
}
)
)
)
)
);
}
next();
if (!ctx.ReturnsVoid && ctx.TryGetAttribute
(ctx.LoadTypes.Length - 1, "Silk.NET.Core.Native.PinObjectAttribute", out var resultData))
{
var gcSlot = ctx.AllocateGcSlot();
PinMode pinMode;
if (resultData.ConstructorArguments.Length < 1)
{
pinMode = PinMode.Persist;
}
else
{
pinMode = (PinMode)(resultData.ConstructorArguments[0].Value ?? PinMode.Persist);
}
var name = pinMode switch
{
PinMode.Persist => "Pin",
PinMode.UntilNextCall => "PinUntilNextCall",
_ => throw new Exception()
};
var resultVariable = ctx.ResolveVariable(ctx.ResultVariable.Value);
ctx.AddSideEffect
(
ctx => ExpressionStatement
(
InvocationExpression
(
MemberAccessExpression
(SyntaxKind.SimpleMemberAccessExpression, ThisExpression(), IdentifierName(name)),
ArgumentList
(
SeparatedList
(
new[]
{
Argument(resultVariable.Value),
Argument
(LiteralExpression(SyntaxKind.NumericLiteralExpression, Literal(gcSlot)))
}
)
)
)
)
);
}
}
}