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methodwrapper.cs

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methodwrapper.cs

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using System;
namespace Python.Runtime
{
/// <summary>
/// A MethodWrapper wraps a static method of a managed type,
/// making it callable by Python as a PyCFunction object. This is
/// currently used mainly to implement special cases like the CLR
/// import hook.
/// </summary>
internal class MethodWrapper
{
public IntPtr mdef;
public IntPtr ptr;
private ThunkInfo _thunk;
private bool _disposed = false;
public MethodWrapper(Type type, string name, string funcType = null)
{
// Turn the managed method into a function pointer
_thunk = Interop.GetThunk(type.GetMethod(name), funcType);
// Allocate and initialize a PyMethodDef structure to represent
// the managed method, then create a PyCFunction.
mdef = Runtime.PyMem_Malloc(4 * IntPtr.Size);
TypeManager.WriteMethodDef(mdef, name, _thunk.Address, 0x0003);
ptr = Runtime.PyCFunction_NewEx(mdef, IntPtr.Zero, IntPtr.Zero);
}
public IntPtr Call(IntPtr args, IntPtr kw)
{
return Runtime.PyCFunction_Call(ptr, args, kw);
}
public void Release()
{
if (_disposed)
{
return;
}
_disposed = true;
bool freeDef = Runtime.Refcount(ptr) == 1;
Runtime.XDecref(ptr);
if (freeDef && mdef != IntPtr.Zero)
{
Runtime.PyMem_Free(mdef);
mdef = IntPtr.Zero;
}
}
}
}
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