using System;

using System.IO;

using System.Text;

namespace Python.Runtime

{

using static Runtime;

[Obsolete("Only to be used from within Python")]

static class Loader

{

public unsafe static int Initialize(IntPtr data, int size)

{

try

{

// On .NET Framework, the host is python.exe which has no binding

// redirects for netstandard2.0 shims (e.g. RuntimeInformation

// Version=0.0.0.0 vs the 4.0.2.0 shim on disk). Binding redirects

// via config files can't be injected after AppDomain creation, so

// resolve assemblies from our runtime directory directly.

// Only needed on .NET Framework; on .NET (Core) this causes

// duplicate assembly loads, as .deps.json is respected and

// the correct assembly is already found.

if (typeof(object).Assembly.GetName().Name == "mscorlib")

{

AppDomain.CurrentDomain.AssemblyResolve += (_, args) =>

{

var name = new System.Reflection.AssemblyName(args.Name);

var dir = Path.GetDirectoryName(typeof(Loader).Assembly.Location);

var path = Path.Combine(dir, name.Name + ".dll");

return File.Exists(path)

? System.Reflection.Assembly.LoadFrom(path)

: null;

};

}

var dllPath = Encodings.UTF8.GetString((byte*)data.ToPointer(), size);

if (!string.IsNullOrEmpty(dllPath))

{

PythonDLL = dllPath;

}

else

{

PythonDLL = null;

}

using var _ = Py.GIL();

PythonEngine.InitExt();

}

catch (Exception exc)

{

Console.Error.Write(

$"Failed to initialize pythonnet: {exc}\n{exc.StackTrace}"

);

return 1;

}

return 0;

}

public unsafe static int Shutdown(IntPtr data, int size)

{

try

{

var command = Encodings.UTF8.GetString((byte*)data.ToPointer(), size);

if (command == "full_shutdown")

{

using var _ = Py.GIL();

PythonEngine.Shutdown();

}

}

catch (Exception exc)

{

Console.Error.Write(

$"Failed to shutdown pythonnet: {exc}\n{exc.StackTrace}"

);

return 1;

}

return 0;

}

}

}