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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace Internal.IL.Stubs
{
internal sealed class PInvokeILCodeStreams
{
public ILEmitter Emitter { get; }
public ILCodeStream FunctionPointerLoadStream { get; }
public ILCodeStream MarshallingCodeStream { get; }
public ILCodeStream CallsiteSetupCodeStream { get; }
public ILCodeStream ReturnValueMarshallingCodeStream { get; }
public ILCodeStream UnmarshallingCodestream { get; }
public ILCodeStream CleanupCodeStream { get; }
public PInvokeILCodeStreams()
{
Emitter = new ILEmitter();
// We have these code streams:
// - FunctionPointerLoadStream is used to load the function pointer to call
// - MarshallingCodeStream is used to convert each argument into a native type and
// store that into the local
// - CallsiteSetupCodeStream is used to used to load each previously generated local
// and call the actual target native method.
// - ReturnValueMarshallingCodeStream is used to convert the native return value
// to managed one.
// - UnmarshallingCodestream is used to propagate [out] native arguments values to
// managed ones.
// - CleanupCodestream is used to perform a guaranteed cleanup
FunctionPointerLoadStream = Emitter.NewCodeStream();
MarshallingCodeStream = Emitter.NewCodeStream();
CallsiteSetupCodeStream = Emitter.NewCodeStream();
ReturnValueMarshallingCodeStream = Emitter.NewCodeStream();
UnmarshallingCodestream = Emitter.NewCodeStream();
CleanupCodeStream = Emitter.NewCodeStream();
}
public PInvokeILCodeStreams(ILEmitter emitter, ILCodeStream codeStream)
{
Emitter = emitter;
MarshallingCodeStream = codeStream;
}
}
}
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