pythonnet/src/runtime/interop.cs at master · saroad2/pythonnet · GitHub

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using System;

using System.Collections;

using System.Collections.Generic;

using System.Diagnostics;

using System.Runtime.InteropServices;

using System.Reflection;

using System.Text;

namespace Python.Runtime

{

/// <summary>

/// This file defines objects to support binary interop with the Python

/// runtime. Generally, the definitions here need to be kept up to date

/// when moving to new Python versions.

/// </summary>

[Serializable]

[AttributeUsage(AttributeTargets.All)]

public class DocStringAttribute : Attribute

{

public DocStringAttribute(string docStr)

{

DocString = docStr;

}

public string DocString

{

get { return docStr; }

set { docStr = value; }

}

private string docStr;

}

[Serializable]

[AttributeUsage(AttributeTargets.Method | AttributeTargets.Delegate)]

internal class PythonMethodAttribute : Attribute

{

public PythonMethodAttribute()

{

}

[Serializable]

[AttributeUsage(AttributeTargets.Method | AttributeTargets.Delegate)]

internal class ModuleFunctionAttribute : Attribute

{

public ModuleFunctionAttribute()

{

}

[Serializable]

[AttributeUsage(AttributeTargets.Method | AttributeTargets.Delegate)]

internal class ForbidPythonThreadsAttribute : Attribute

{

public ForbidPythonThreadsAttribute()

{

}

[Serializable]

[AttributeUsage(AttributeTargets.Property)]

internal class ModulePropertyAttribute : Attribute

{

public ModulePropertyAttribute()

{

}

/// <summary>

/// TypeFlags(): The actual bit values for the Type Flags stored

/// in a class.

/// Note that the two values reserved for stackless have been put

/// to good use as PythonNet specific flags (Managed and Subclass)

/// </summary>

// Py_TPFLAGS_*

[Flags]

public enum TypeFlags: int

{

HeapType = (1 << 9),

BaseType = (1 << 10),

Ready = (1 << 12),

Readying = (1 << 13),

HaveGC = (1 << 14),

// 15 and 16 are reserved for stackless

HaveStacklessExtension = 0,

/* XXX Reusing reserved constants */

/// <remarks>PythonNet specific</remarks>

HasClrInstance = (1 << 15),

/// <remarks>PythonNet specific</remarks>

Subclass = (1 << 16),

HaveIndex = (1 << 17),

/* Objects support nb_index in PyNumberMethods */

HaveVersionTag = (1 << 18),

ValidVersionTag = (1 << 19),

IsAbstract = (1 << 20),

HaveNewBuffer = (1 << 21),

// TODO: Implement FastSubclass functions

IntSubclass = (1 << 23),

LongSubclass = (1 << 24),

ListSubclass = (1 << 25),

TupleSubclass = (1 << 26),

StringSubclass = (1 << 27),

UnicodeSubclass = (1 << 28),

DictSubclass = (1 << 29),

BaseExceptionSubclass = (1 << 30),

TypeSubclass = (1 << 31),

Default = (

HaveStacklessExtension |

HaveVersionTag),

}

// This class defines the function prototypes (delegates) used for low

// level integration with the CPython runtime. It also provides name

// based lookup of the correct prototype for a particular Python type

// slot and utilities for generating method thunks for managed methods.

internal class Interop

{

private static Hashtable pmap;

static Interop()

{

// Here we build a mapping of PyTypeObject slot names to the

// appropriate prototype (delegate) type to use for the slot.

Type[] items = typeof(Interop).GetNestedTypes();

Hashtable p = new Hashtable();

for (int i = 0; i < items.Length; i++)

{

Type item = items[i];

p[item.Name] = item;

}

pmap = new Hashtable();

pmap["tp_dealloc"] = p["DestructorFunc"];

pmap["tp_print"] = p["PrintFunc"];

pmap["tp_getattr"] = p["BinaryFunc"];

pmap["tp_setattr"] = p["ObjObjArgFunc"];

pmap["tp_compare"] = p["ObjObjFunc"];

pmap["tp_repr"] = p["UnaryFunc"];

pmap["tp_hash"] = p["UnaryFunc"];

pmap["tp_call"] = p["TernaryFunc"];

pmap["tp_str"] = p["UnaryFunc"];

pmap["tp_getattro"] = p["BinaryFunc"];

pmap["tp_setattro"] = p["ObjObjArgFunc"];

pmap["tp_traverse"] = p["ObjObjArgFunc"];

pmap["tp_clear"] = p["InquiryFunc"];

pmap["tp_richcompare"] = p["RichCmpFunc"];

pmap["tp_iter"] = p["UnaryFunc"];

pmap["tp_iternext"] = p["UnaryFunc"];

pmap["tp_descr_get"] = p["TernaryFunc"];

pmap["tp_descr_set"] = p["ObjObjArgFunc"];

pmap["tp_init"] = p["ObjObjArgFunc"];

pmap["tp_alloc"] = p["IntArgFunc"];

pmap["tp_new"] = p["TernaryFunc"];

pmap["tp_free"] = p["DestructorFunc"];

pmap["tp_is_gc"] = p["InquiryFunc"];

pmap["nb_add"] = p["BinaryFunc"];

pmap["nb_subtract"] = p["BinaryFunc"];

pmap["nb_multiply"] = p["BinaryFunc"];

pmap["nb_remainder"] = p["BinaryFunc"];

pmap["nb_divmod"] = p["BinaryFunc"];

pmap["nb_power"] = p["TernaryFunc"];

pmap["nb_negative"] = p["UnaryFunc"];

pmap["nb_positive"] = p["UnaryFunc"];

pmap["nb_absolute"] = p["UnaryFunc"];

pmap["nb_nonzero"] = p["InquiryFunc"];

pmap["nb_invert"] = p["UnaryFunc"];

pmap["nb_lshift"] = p["BinaryFunc"];

pmap["nb_rshift"] = p["BinaryFunc"];

pmap["nb_and"] = p["BinaryFunc"];

pmap["nb_xor"] = p["BinaryFunc"];

pmap["nb_or"] = p["BinaryFunc"];

pmap["nb_coerce"] = p["ObjObjFunc"];

pmap["nb_int"] = p["UnaryFunc"];

pmap["nb_long"] = p["UnaryFunc"];

pmap["nb_float"] = p["UnaryFunc"];

pmap["nb_oct"] = p["UnaryFunc"];

pmap["nb_hex"] = p["UnaryFunc"];

pmap["nb_inplace_add"] = p["BinaryFunc"];

pmap["nb_inplace_subtract"] = p["BinaryFunc"];

pmap["nb_inplace_multiply"] = p["BinaryFunc"];

pmap["nb_inplace_remainder"] = p["BinaryFunc"];

pmap["nb_inplace_power"] = p["TernaryFunc"];

pmap["nb_inplace_lshift"] = p["BinaryFunc"];

pmap["nb_inplace_rshift"] = p["BinaryFunc"];

pmap["nb_inplace_and"] = p["BinaryFunc"];

pmap["nb_inplace_xor"] = p["BinaryFunc"];

pmap["nb_inplace_or"] = p["BinaryFunc"];

pmap["nb_floor_divide"] = p["BinaryFunc"];

pmap["nb_true_divide"] = p["BinaryFunc"];

pmap["nb_inplace_floor_divide"] = p["BinaryFunc"];

pmap["nb_inplace_true_divide"] = p["BinaryFunc"];

pmap["nb_index"] = p["UnaryFunc"];

pmap["sq_length"] = p["InquiryFunc"];

pmap["sq_concat"] = p["BinaryFunc"];

pmap["sq_repeat"] = p["IntArgFunc"];

pmap["sq_item"] = p["IntArgFunc"];

pmap["sq_slice"] = p["IntIntArgFunc"];

pmap["sq_ass_item"] = p["IntObjArgFunc"];

pmap["sq_ass_slice"] = p["IntIntObjArgFunc"];

pmap["sq_contains"] = p["ObjObjFunc"];

pmap["sq_inplace_concat"] = p["BinaryFunc"];

pmap["sq_inplace_repeat"] = p["IntArgFunc"];

pmap["mp_length"] = p["InquiryFunc"];

pmap["mp_subscript"] = p["BinaryFunc"];

pmap["mp_ass_subscript"] = p["ObjObjArgFunc"];

pmap["bf_getreadbuffer"] = p["IntObjArgFunc"];

pmap["bf_getwritebuffer"] = p["IntObjArgFunc"];

pmap["bf_getsegcount"] = p["ObjObjFunc"];

pmap["bf_getcharbuffer"] = p["IntObjArgFunc"];

}

internal static Type GetPrototype(string name)

{

return pmap[name] as Type;

}

internal static Dictionary<IntPtr, Delegate> allocatedThunks = new Dictionary<IntPtr, Delegate>();

internal static ThunkInfo GetThunk(MethodInfo method, string funcType = null)

{

Type dt;

if (funcType != null)

dt = typeof(Interop).GetNestedType(funcType) as Type;

else

dt = GetPrototype(method.Name);

if (dt == null)

{

return ThunkInfo.Empty;

}

Delegate d = Delegate.CreateDelegate(dt, method);

var info = new ThunkInfo(d);

allocatedThunks[info.Address] = d;

return info;

}