pythonnet/Python.Runtime/moduleobject.cs at modernisation · Turall/pythonnet · GitHub

Repository navigation

History

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

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

using System;

using System.Collections.Generic;

using System.IO;

using System.Reflection;

using System.Runtime.InteropServices;

namespace Python.Runtime

{

/// <summary>

/// Implements a Python type that provides access to CLR namespaces. The

/// type behaves like a Python module, and can contain other sub-modules.

/// </summary>

internal class ModuleObject : ExtensionType

{

private Dictionary<string, ManagedType> cache;

internal string moduleName;

internal IntPtr dict;

protected string _namespace;

public ModuleObject(string name)

{

if (name == string.Empty)

{

throw new ArgumentException("Name must not be empty!");

}

moduleName = name;

cache = new Dictionary<string, ManagedType>();

_namespace = name;

// Use the filename from any of the assemblies just so there's something for

// anything that expects __file__ to be set.

var filename = "unknown";

var docstring = "Namespace containing types from the following assemblies:\n\n";

foreach (Assembly a in AssemblyManager.GetAssemblies(name))

{

if (!a.IsDynamic && a.Location != null)

{

filename = a.Location;

}

docstring += "- " + a.FullName + "\n";

}

dict = Runtime.PyDict_New();

IntPtr pyname = Runtime.PyString_FromString(moduleName);

IntPtr pyfilename = Runtime.PyString_FromString(filename);

IntPtr pydocstring = Runtime.PyString_FromString(docstring);

IntPtr pycls = TypeManager.GetTypeHandle(GetType());

Runtime.PyDict_SetItemString(dict, "__name__", pyname);

Runtime.PyDict_SetItemString(dict, "__file__", pyfilename);

Runtime.PyDict_SetItemString(dict, "__doc__", pydocstring);

Runtime.PyDict_SetItemString(dict, "__class__", pycls);

Runtime.XDecref(pyname);

Runtime.XDecref(pyfilename);

Runtime.XDecref(pydocstring);

Marshal.WriteIntPtr(pyHandle, ObjectOffset.DictOffset(pyHandle), dict);

InitializeModuleMembers();

}

/// <summary>

/// Returns a ClassBase object representing a type that appears in

/// this module's namespace or a ModuleObject representing a child

/// namespace (or null if the name is not found). This method does

/// not increment the Python refcount of the returned object.

/// </summary>

public ManagedType GetAttribute(string name, bool guess)

{

ManagedType cached = null;

cache.TryGetValue(name, out cached);

if (cached != null)

{

return cached;

}

ModuleObject m;

ClassBase c;

Type type;

//if (AssemblyManager.IsValidNamespace(name))

//{

// IntPtr py_mod_name = Runtime.PyString_FromString(name);

// IntPtr modules = Runtime.PyImport_GetModuleDict();

// IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name);

// if (module != IntPtr.Zero)

// return (ManagedType)this;

// return null;

//}

string qname = _namespace == string.Empty

? name

: _namespace + "." + name;

// If the fully-qualified name of the requested attribute is

// a namespace exported by a currently loaded assembly, return

// a new ModuleObject representing that namespace.

if (AssemblyManager.IsValidNamespace(qname))

{

m = new ModuleObject(qname);

StoreAttribute(name, m);

return m;

}

// Look for a type in the current namespace. Note that this

// includes types, delegates, enums, interfaces and structs.

// Only public namespace members are exposed to Python.

type = AssemblyManager.LookupType(qname);

if (type != null)

{

if (!type.IsPublic)

{

return null;

}

c = ClassManager.GetClass(type);

StoreAttribute(name, c);

return c;

}

// This is a little repetitive, but it ensures that the right

// thing happens with implicit assembly loading at a reasonable

// cost. Ask the AssemblyManager to do implicit loading for each

// of the steps in the qualified name, then try it again.

bool ignore = name.StartsWith("__");

if (AssemblyManager.LoadImplicit(qname, !ignore))

{

if (AssemblyManager.IsValidNamespace(qname))

{

m = new ModuleObject(qname);

StoreAttribute(name, m);

return m;

}

type = AssemblyManager.LookupType(qname);

if (type != null)

{

if (!type.IsPublic)

{

return null;

}

c = ClassManager.GetClass(type);

StoreAttribute(name, c);

return c;

}

// We didn't find the name, so we may need to see if there is a

// generic type with this base name. If so, we'll go ahead and

// return it. Note that we store the mapping of the unmangled

// name to generic type - it is technically possible that some

// future assembly load could contribute a non-generic type to

// the current namespace with the given basename, but unlikely

// enough to complicate the implementation for now.

if (guess)

{

string gname = GenericUtil.GenericNameForBaseName(_namespace, name);

if (gname != null)

{

ManagedType o = GetAttribute(gname, false);

if (o != null)

{

StoreAttribute(name, o);

return o;

}

return null;

}

/// <summary>

/// Stores an attribute in the instance dict for future lookups.

/// </summary>

private void StoreAttribute(string name, ManagedType ob)

{

Runtime.PyDict_SetItemString(dict, name, ob.pyHandle);

cache[name] = ob;

}

/// <summary>

/// Preloads all currently-known names for the module namespace. This

/// can be called multiple times, to add names from assemblies that

/// may have been loaded since the last call to the method.

/// </summary>

public void LoadNames()

{

ManagedType m = null;

foreach (string name in AssemblyManager.GetNames(_namespace))

{

cache.TryGetValue(name, out m);

if (m != null)

{

continue;

}

IntPtr attr = Runtime.PyDict_GetItemString(dict, name);

// If __dict__ has already set a custom property, skip it.

if (attr != IntPtr.Zero)

{

continue;

}

GetAttribute(name, true);

}

/// <summary>

/// Initialize module level functions and attributes

/// </summary>

internal void InitializeModuleMembers()

{

Type funcmarker = typeof(ModuleFunctionAttribute);

Type propmarker = typeof(ModulePropertyAttribute);

Type ftmarker = typeof(ForbidPythonThreadsAttribute);

Type type = GetType();

BindingFlags flags = BindingFlags.Public | BindingFlags.Static;

while (type != null)

{

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

foreach (MethodInfo method in methods)

{

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

object[] forbid = method.GetCustomAttributes(ftmarker, false);

bool allow_threads = forbid.Length == 0;

if (attrs.Length > 0)

{

string name = method.Name;

var mi = new MethodInfo[1];

mi[0] = method;

var m = new ModuleFunctionObject(type, name, mi, allow_threads);

StoreAttribute(name, m);

}

PropertyInfo[] properties = type.GetProperties();

foreach (PropertyInfo property in properties)

{

object[] attrs = property.GetCustomAttributes(propmarker, false);

if (attrs.Length > 0)

{

string name = property.Name;

var p = new ModulePropertyObject(property);

StoreAttribute(name, p);

}

type = type.BaseType;

}

/// <summary>

/// ModuleObject __getattribute__ implementation. Module attributes

/// are always either classes or sub-modules representing subordinate

/// namespaces. CLR modules implement a lazy pattern - the sub-modules

/// and classes are created when accessed and cached for future use.

/// </summary>

public static IntPtr tp_getattro(IntPtr ob, IntPtr key)

{

var self = (ModuleObject)GetManagedObject(ob);

if (!Runtime.PyString_Check(key))

{

Exceptions.SetError(Exceptions.TypeError, "string expected");

return IntPtr.Zero;

}

IntPtr op = Runtime.PyDict_GetItem(self.dict, key);

if (op != IntPtr.Zero)

{

Runtime.XIncref(op);

return op;

}

string name = Runtime.GetManagedString(key);

if (name == "__dict__")

{

Runtime.XIncref(self.dict);

return self.dict;

}

ManagedType attr = self.GetAttribute(name, true);

if (attr == null)

{

Exceptions.SetError(Exceptions.AttributeError, name);

return IntPtr.Zero;

}

Runtime.XIncref(attr.pyHandle);

return attr.pyHandle;

}

/// <summary>

/// ModuleObject __repr__ implementation.

/// </summary>

public static IntPtr tp_repr(IntPtr ob)

{

var self = (ModuleObject)GetManagedObject(ob);

return Runtime.PyString_FromString($"<module '{self.moduleName}'>");

}

/// <summary>

/// The CLR module is the root handler used by the magic import hook

/// to import assemblies. It has a fixed module name "clr" and doesn't

/// provide a namespace.

/// </summary>

internal class CLRModule : ModuleObject

{

protected static bool hacked = false;

protected static bool interactive_preload = true;

internal static bool preload;

// XXX Test performance of new features //

internal static bool _SuppressDocs = false;

internal static bool _SuppressOverloads = false;

public CLRModule() : base("clr")

{

_namespace = string.Empty;

// This hackery is required in order to allow a plain Python to

// import the managed runtime via the CLR bootstrapper module.

// The standard Python machinery in control at the time of the

// import requires the module to pass PyModule_Check. :(

if (!hacked)

{

IntPtr type = tpHandle;

IntPtr mro = Marshal.ReadIntPtr(type, TypeOffset.tp_mro);

IntPtr ext = Runtime.ExtendTuple(mro, Runtime.PyModuleType);

Marshal.WriteIntPtr(type, TypeOffset.tp_mro, ext);

Runtime.XDecref(mro);

hacked = true;

}

public static void Reset()

{

hacked = false;

interactive_preload = true;

preload = false;

// XXX Test performance of new features //

_SuppressDocs = false;

_SuppressOverloads = false;

}

/// <summary>

/// The initializing of the preload hook has to happen as late as

/// possible since sys.ps1 is created after the CLR module is

/// created.

/// </summary>

internal void InitializePreload()

{

if (interactive_preload)

{

interactive_preload = false;

if (Runtime.PySys_GetObject("ps1") != IntPtr.Zero)

{

preload = true;

}

else

{

Exceptions.Clear();

preload = false;

}

[ModuleFunction]

public static bool getPreload()

{

return preload;

}

[ModuleFunction]

public static void setPreload(bool preloadFlag)

{

preload = preloadFlag;

}

//[ModuleProperty]

public static bool SuppressDocs

{

get { return _SuppressDocs; }

set { _SuppressDocs = value; }

}

//[ModuleProperty]

public static bool SuppressOverloads

{

get { return _SuppressOverloads; }

set { _SuppressOverloads = value; }

}

[ModuleFunction]

[ForbidPythonThreads]

public static Assembly AddReference(string name)

{

AssemblyManager.UpdatePath();

Assembly assembly = null;

assembly = AssemblyManager.FindLoadedAssembly(name);

if (assembly == null)

{

assembly = AssemblyManager.LoadAssemblyPath(name);

}

if (assembly == null)

{

assembly = AssemblyManager.LoadAssembly(name);

}

if (assembly == null)

{

assembly = AssemblyManager.LoadAssemblyFullPath(name);

}

if (assembly == null)

{

throw new FileNotFoundException($"Unable to find assembly '{name}'.");

}

return assembly;

}

/// <summary>

/// Get a Type instance for a class object.

/// clr.GetClrType(IComparable) gives you the Type for IComparable,

/// that you can e.g. perform reflection on. Similar to typeof(IComparable) in C#

/// or clr.GetClrType(IComparable) in IronPython.

///

/// </summary>

/// <param name="type"></param>

/// <returns>The Type object</returns>

[ModuleFunction]

[ForbidPythonThreads]

public static Type GetClrType(Type type)

{

return type;

}

[ModuleFunction]

[ForbidPythonThreads]

public static string FindAssembly(string name)

{

AssemblyManager.UpdatePath();

return AssemblyManager.FindAssembly(name);

}

[ModuleFunction]

public static string[] ListAssemblies(bool verbose)

{

AssemblyName[] assnames = AssemblyManager.ListAssemblies();

var names = new string[assnames.Length];

for (var i = 0; i < assnames.Length; i++)

{

if (verbose)

{

names[i] = assnames[i].FullName;

}

else

{

names[i] = assnames[i].Name;

}

return names;

}

[ModuleFunction]

public static int _AtExit()

{

return Runtime.AtExit();

}

pythonnet/Python.Runtime/moduleobject.cs at modernisation · Turall/pythonnet · GitHub

Repository navigation

Expand file tree

Breadcrumbs

moduleobject.cs

Latest commit

History

Breadcrumbs

moduleobject.cs

File metadata and controls