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88 lines (77 loc) · 3.56 KB
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#if FEATURE_CTYPES
using System;
using System.Collections.Generic;
using System.Reflection.Emit;
namespace IronPython.Modules {
/// <summary>
/// Provides support for interop with native code from Python code.
/// </summary>
public static partial class CTypes {
/// <summary>
/// Common functionality that all of the meta classes provide which is part of
/// our implementation. This is used to implement the serialization/deserialization
/// of values into/out of memory, emit the marshalling logic for call stubs, and
/// provide common information (size/alignment) for the types.
/// </summary>
internal interface INativeType {
/// <summary>
/// Gets the native size of the type
/// </summary>
int Size {
get;
}
/// <summary>
/// Gets the required alignment for the type
/// </summary>
int Alignment {
get;
}
/// <summary>
/// Deserialized the value of this type from the given address at the given
/// offset. Any new objects which are created will keep the provided
/// MemoryHolder alive.
///
/// raw determines if the cdata is returned or if the primitive value is
/// returned. This is only applicable for subtypes of simple cdata types.
/// </summary>
object GetValue(MemoryHolder/*!*/ owner, object readingFrom, int offset, bool raw);
/// <summary>
/// Serializes the provided value into the specified address at the given
/// offset.
/// </summary>
object SetValue(MemoryHolder/*!*/ address, int offset, object value);
/// <summary>
/// Gets the .NET type which is used when calling or returning the value
/// from native code.
/// </summary>
Type/*!*/ GetNativeType();
/// <summary>
/// Gets the .NET type which the native type is converted into when going to Python
/// code. This is usually int, BigInt, double, object, or a CData type.
/// </summary>
Type/*!*/ GetPythonType();
/// <summary>
/// Emits marshalling of an object from Python to native code. This produces the
/// native type from the Python type.
/// </summary>
MarshalCleanup EmitMarshalling(ILGenerator/*!*/ method, LocalOrArg/*!*/ argIndex, List<object>/*!*/ constantPool, int constantPoolArgument);
/// <summary>
/// Emits marshalling from native code to Python code This produces the python type
/// from the native type. This is used for return values and parameters
/// to Python callable objects that are passed back out to native code.
/// </summary>
void EmitReverseMarshalling(ILGenerator/*!*/ method, LocalOrArg/*!*/ value, List<object>/*!*/ constantPool, int constantPoolArgument);
/// <summary>
/// Returns a string which describes the type. Used for _buffer_info implementation which
/// only exists for testing purposes.
/// </summary>
string TypeFormat {
get;
}
}
}
}
#endif