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interop.cs
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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;
}
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr UnaryFunc(IntPtr ob);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr BinaryFunc(IntPtr ob, IntPtr arg);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr TernaryFunc(IntPtr ob, IntPtr a1, IntPtr a2);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int InquiryFunc(IntPtr ob);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr IntArgFunc(IntPtr ob, int arg);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr IntIntArgFunc(IntPtr ob, int a1, int a2);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int IntObjArgFunc(IntPtr ob, int a1, IntPtr a2);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int IntIntObjArgFunc(IntPtr o, int a, int b, IntPtr c);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int ObjObjArgFunc(IntPtr o, IntPtr a, IntPtr b);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int ObjObjFunc(IntPtr ob, IntPtr arg);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate void DestructorFunc(IntPtr ob);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate int PrintFunc(IntPtr ob, IntPtr a, int b);
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr RichCmpFunc(IntPtr ob, IntPtr a, int b);
}
internal class ThunkInfo
{
public readonly Delegate Target;
public readonly IntPtr Address;
public static readonly ThunkInfo Empty = new ThunkInfo(null);
public ThunkInfo(Delegate target)
{
if (target == null)
{
return;
}
Target = target;
Address = Marshal.GetFunctionPointerForDelegate(target);
}
}
[StructLayout(LayoutKind.Sequential)]
struct PyGC_Node
{
public IntPtr gc_next;
public IntPtr gc_prev;
public IntPtr gc_refs;
}
[StructLayout(LayoutKind.Sequential)]
struct PyGC_Head
{
public PyGC_Node gc;
}
[StructLayout(LayoutKind.Sequential)]
struct PyMethodDef
{
public IntPtr ml_name;
public IntPtr ml_meth;
public int ml_flags;
public IntPtr ml_doc;
}
}