pythonnet-rawsvnmig/pythonnet/src/runtime/typemanager.cs at master · pythonnet/pythonnet-rawsvnmig · GitHub

This repository was archived by the owner on Jun 4, 2019. It is now read-only.

History

452 lines (334 loc) · 17.8 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

// ==========================================================================

// This software is subject to the provisions of the Zope Public License,

// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.

// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

// FOR A PARTICULAR PURPOSE.

// ==========================================================================

using System;

using System.Runtime.InteropServices;

using System.Reflection.Emit;

using System.Collections.Generic;

using System.Collections;

using System.Reflection;

using System.Threading;

namespace Python.Runtime {

//=======================================================================

// The TypeManager class is responsible for building binary-compatible

// Python type objects that are implemented in managed code.

//=======================================================================

internal class TypeManager {

static BindingFlags tbFlags;

static Dictionary<Type, IntPtr> cache;

static int obSize;

static TypeManager() {

tbFlags = BindingFlags.Public | BindingFlags.Static;

obSize = 5 * IntPtr.Size;

cache = new Dictionary<Type, IntPtr>(128);

}

//====================================================================

// Given a managed Type derived from ExtensionType, get the handle to

// a Python type object that delegates its implementation to the Type

// object. These Python type instances are used to implement internal

// descriptor and utility types like ModuleObject, PropertyObject, etc.

//====================================================================

internal static IntPtr GetTypeHandle(Type type) {

// Note that these types are cached with a refcount of 1, so they

// effectively exist until the CPython runtime is finalized.

IntPtr handle = IntPtr.Zero;

cache.TryGetValue(type, out handle);

if (handle != IntPtr.Zero) {

return handle;

}

handle = CreateType(type);

cache[type] = handle;

return handle;

}

//====================================================================

// Get the handle of a Python type that reflects the given CLR type.

// The given ManagedType instance is a managed object that implements

// the appropriate semantics in Python for the reflected managed type.

//====================================================================

internal static IntPtr GetTypeHandle(ManagedType obj, Type type) {

IntPtr handle = IntPtr.Zero;

cache.TryGetValue(type, out handle);

if (handle != IntPtr.Zero) {

return handle;

}

handle = CreateType(obj, type);

cache[type] = handle;

return handle;

}

//====================================================================

// The following CreateType implementations do the necessary work to

// create Python types to represent managed extension types, reflected

// types, subclasses of reflected types and the managed metatype. The

// dance is slightly different for each kind of type due to different

// behavior needed and the desire to have the existing Python runtime

// do as much of the allocation and initialization work as possible.

//====================================================================

internal static IntPtr CreateType(Type impl) {

IntPtr type = AllocateTypeObject(impl.Name);

// Set tp_basicsize to the size of our managed instance objects.

Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize);

IntPtr offset = (IntPtr)ObjectOffset.ob_dict;

Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset);

InitializeSlots(type, impl);

int flags = TypeFlags.Default | TypeFlags.Managed |

TypeFlags.HeapType | TypeFlags.HaveGC;

Marshal.WriteIntPtr(type, TypeOffset.tp_flags, (IntPtr)flags);

Runtime.PyType_Ready(type);

IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

IntPtr mod = Runtime.PyString_FromString("CLR");

Runtime.PyDict_SetItemString(dict, "__module__", mod);

InitMethods(type, impl);

return type;

}

internal static IntPtr CreateType(ManagedType impl, Type clrType) {

// Cleanup the type name to get rid of funny nested type names.

string name = "CLR." + clrType.FullName;

int i = name.LastIndexOf('+');

if (i > -1) {

name = name.Substring(i + 1);

}

i = name.LastIndexOf('.');

if (i > -1) {

name = name.Substring(i + 1);

}

IntPtr base_ = IntPtr.Zero;

// XXX Hack, use a different base class for System.Exception

// Python 2.5+ allows new style class exceptions but they *must*

// subclass BaseException (or better Exception).

#if (PYTHON25 || PYTHON26 || PYTHON27)

if (clrType == typeof(System.Exception)) {

base_ = Exceptions.Exception;

Runtime.Incref(base_);

} else

#endif

if (clrType.BaseType != null) {

ClassBase bc = ClassManager.GetClass(clrType.BaseType);

base_ = bc.pyHandle;

}

IntPtr type = AllocateTypeObject(name);

Marshal.WriteIntPtr(type,TypeOffset.ob_type,Runtime.PyCLRMetaType);

Runtime.Incref(Runtime.PyCLRMetaType);

Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize);

Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero);

IntPtr offset = (IntPtr)ObjectOffset.ob_dict;

Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset);

InitializeSlots(type, impl.GetType());

if (base_ != IntPtr.Zero) {

Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_);

Runtime.Incref(base_);

}

int flags = TypeFlags.Default;

flags |= TypeFlags.Managed;

flags |= TypeFlags.HeapType;

flags |= TypeFlags.BaseType;

flags |= TypeFlags.HaveGC;

Marshal.WriteIntPtr(type, TypeOffset.tp_flags, (IntPtr)flags);

// Leverage followup initialization from the Python runtime. Note

// that the type of the new type must PyType_Type at the time we

// call this, else PyType_Ready will skip some slot initialization.

Runtime.PyType_Ready(type);

IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

string mn = clrType.Namespace != null ? clrType.Namespace : "";

IntPtr mod = Runtime.PyString_FromString(mn);

Runtime.PyDict_SetItemString(dict, "__module__", mod);

// Hide the gchandle of the implementation in a magic type slot.

GCHandle gc = GCHandle.Alloc(impl);

Marshal.WriteIntPtr(type, TypeOffset.magic(), (IntPtr)gc);

// Set the handle attributes on the implementing instance.

impl.tpHandle = Runtime.PyCLRMetaType;

impl.gcHandle = gc;

impl.pyHandle = type;

//DebugUtil.DumpType(type);

return type;

}

internal static IntPtr CreateSubType(IntPtr args) {

IntPtr py_name = Runtime.PyTuple_GetItem(args, 0);

IntPtr bases = Runtime.PyTuple_GetItem(args, 1);

IntPtr dict = Runtime.PyTuple_GetItem(args, 2);

IntPtr base_ = Runtime.PyTuple_GetItem(bases, 0);

string name = Runtime.GetManagedString(py_name);

IntPtr type = AllocateTypeObject(name);

Marshal.WriteIntPtr(type,TypeOffset.ob_type,Runtime.PyCLRMetaType);

Runtime.Incref(Runtime.PyCLRMetaType);

Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize);

Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero);

IntPtr offset = (IntPtr)ObjectOffset.ob_dict;

Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset);

IntPtr dc = Runtime.PyDict_Copy(dict);

Marshal.WriteIntPtr(type, TypeOffset.tp_dict, dc);

Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_);

Runtime.Incref(base_);

int flags = TypeFlags.Default;

flags |= TypeFlags.Managed;

flags |= TypeFlags.HeapType;

flags |= TypeFlags.BaseType;

flags |= TypeFlags.Subclass;

flags |= TypeFlags.HaveGC;

Marshal.WriteIntPtr(type, TypeOffset.tp_flags, (IntPtr)flags);

CopySlot(base_, type, TypeOffset.tp_traverse);

CopySlot(base_, type, TypeOffset.tp_clear);

CopySlot(base_, type, TypeOffset.tp_is_gc);

Runtime.PyType_Ready(type);

IntPtr tp_dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

IntPtr mod = Runtime.PyString_FromString("CLR");

Runtime.PyDict_SetItemString(tp_dict, "__module__", mod);

// for now, move up hidden handle...

IntPtr gc = Marshal.ReadIntPtr(base_, TypeOffset.magic());

Marshal.WriteIntPtr(type, TypeOffset.magic(), gc);

return type;

}

internal static IntPtr CreateMetaType(Type impl) {

// The managed metatype is functionally little different than the

// standard Python metatype (PyType_Type). It overrides certain of

// the standard type slots, and has to subclass PyType_Type for

// certain functions in the C runtime to work correctly with it.

IntPtr type = AllocateTypeObject("CLR Metatype");

IntPtr py_type = Runtime.PyTypeType;

Marshal.WriteIntPtr(type, TypeOffset.tp_base, py_type);

Runtime.Incref(py_type);

// Copy gc and other type slots from the base Python metatype.

CopySlot(py_type, type, TypeOffset.tp_basicsize);

CopySlot(py_type, type, TypeOffset.tp_itemsize);

CopySlot(py_type, type, TypeOffset.tp_dictoffset);

CopySlot(py_type, type, TypeOffset.tp_weaklistoffset);

CopySlot(py_type, type, TypeOffset.tp_traverse);

CopySlot(py_type, type, TypeOffset.tp_clear);

CopySlot(py_type, type, TypeOffset.tp_is_gc);

// Override type slots with those of the managed implementation.

InitializeSlots(type, impl);

int flags = TypeFlags.Default;

flags |= TypeFlags.Managed;

flags |= TypeFlags.HeapType;

flags |= TypeFlags.HaveGC;

Marshal.WriteIntPtr(type, TypeOffset.tp_flags, (IntPtr)flags);

Runtime.PyType_Ready(type);

IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

IntPtr mod = Runtime.PyString_FromString("CLR");

Runtime.PyDict_SetItemString(dict, "__module__", mod);

//DebugUtil.DumpType(type);

return type;

}

internal static IntPtr BasicSubType(string name, IntPtr base_,

Type impl) {

// Utility to create a subtype of a std Python type, but with

// a managed type able to override implementation

IntPtr type = AllocateTypeObject(name);

//Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize);

//Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero);

//IntPtr offset = (IntPtr)ObjectOffset.ob_dict;

//Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset);

//IntPtr dc = Runtime.PyDict_Copy(dict);

//Marshal.WriteIntPtr(type, TypeOffset.tp_dict, dc);

Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_);

Runtime.Incref(base_);

int flags = TypeFlags.Default;

flags |= TypeFlags.Managed;

flags |= TypeFlags.HeapType;

flags |= TypeFlags.HaveGC;

Marshal.WriteIntPtr(type, TypeOffset.tp_flags, (IntPtr)flags);

CopySlot(base_, type, TypeOffset.tp_traverse);

CopySlot(base_, type, TypeOffset.tp_clear);

CopySlot(base_, type, TypeOffset.tp_is_gc);

InitializeSlots(type, impl);

Runtime.PyType_Ready(type);

IntPtr tp_dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);

IntPtr mod = Runtime.PyString_FromString("CLR");

Runtime.PyDict_SetItemString(tp_dict, "__module__", mod);

return type;

}

//====================================================================

// Utility method to allocate a type object & do basic initialization.

//====================================================================

internal static IntPtr AllocateTypeObject(string name) {

IntPtr type = Runtime.PyType_GenericAlloc(Runtime.PyTypeType, 0);

// Cheat a little: we'll set tp_name to the internal char * of

// the Python version of the type name - otherwise we'd have to

// allocate the tp_name and would have no way to free it.

IntPtr temp = Runtime.PyString_FromString(name);

IntPtr raw = Runtime.PyString_AS_STRING(temp);

Marshal.WriteIntPtr(type, TypeOffset.tp_name, raw);

Marshal.WriteIntPtr(type, TypeOffset.name, temp);

long ptr = type.ToInt64(); // 64-bit safe

temp = new IntPtr(ptr + TypeOffset.nb_add);

Marshal.WriteIntPtr(type, TypeOffset.tp_as_number, temp);

temp = new IntPtr(ptr + TypeOffset.sq_length);

Marshal.WriteIntPtr(type, TypeOffset.tp_as_sequence, temp);

temp = new IntPtr(ptr + TypeOffset.mp_length);

Marshal.WriteIntPtr(type, TypeOffset.tp_as_mapping, temp);

temp = new IntPtr(ptr + TypeOffset.bf_getreadbuffer);

Marshal.WriteIntPtr(type, TypeOffset.tp_as_buffer, temp);

return type;

}

//====================================================================

// Given a newly allocated Python type object and a managed Type that

// provides the implementation for the type, connect the type slots of

// the Python object to the managed methods of the implementing Type.

//====================================================================

internal static void InitializeSlots(IntPtr type, Type impl) {

Hashtable seen = new Hashtable(8);

Type offsetType = typeof(TypeOffset);

while (impl != null) {

MethodInfo[] methods = impl.GetMethods(tbFlags);

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

MethodInfo method = methods[i];

string name = method.Name;

if (! (name.StartsWith("tp_") ||

name.StartsWith("nb_") ||

name.StartsWith("sq_") ||

name.StartsWith("mp_") ||

name.StartsWith("bf_")

) ) {

continue;

}

if (seen[name] != null) {

continue;

}

FieldInfo fi = offsetType.GetField(name);

int offset = (int)fi.GetValue(offsetType);

IntPtr slot = Interop.GetThunk(method);

Marshal.WriteIntPtr(type, offset, slot);

seen[name] = 1;

}

impl = impl.BaseType;

}

//====================================================================

// Given a newly allocated Python type object and a managed Type that

// implements it, initialize any methods defined by the Type that need

// to appear in the Python type __dict__ (based on custom attribute).

//====================================================================

private static void InitMethods(IntPtr pytype, Type type) {

IntPtr dict = Marshal.ReadIntPtr(pytype, TypeOffset.tp_dict);

Type marker = typeof(PythonMethodAttribute);

BindingFlags flags = BindingFlags.Public | BindingFlags.Static;

while (type != null) {

MethodInfo[] methods = type.GetMethods(flags);

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

MethodInfo method = methods[i];

object[] attrs = method.GetCustomAttributes(marker, false);

if (attrs.Length > 0) {

string method_name = method.Name;

MethodInfo[] mi = new MethodInfo[1];

mi[0] = method;

MethodObject m = new TypeMethod(method_name, mi);

Runtime.PyDict_SetItemString(dict, method_name,

m.pyHandle);

}

type = type.BaseType;

}

//====================================================================

// Utility method to copy slots from a given type to another type.

//====================================================================

internal static void CopySlot(IntPtr from, IntPtr to, int offset) {

IntPtr fp = Marshal.ReadIntPtr(from, offset);

Marshal.WriteIntPtr(to, offset, fp);

}

pythonnet-rawsvnmig/pythonnet/src/runtime/typemanager.cs at master · pythonnet/pythonnet-rawsvnmig · GitHub

Uh oh!

Expand file tree

Breadcrumbs

typemanager.cs

Latest commit

History

Breadcrumbs

typemanager.cs

File metadata and controls