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GeezerVison is showing github.com — pythonnet/src/runtime/moduleobject.cs at python3 · fkarb/pythonnet Expand file tree/ Copy pathmoduleobject.csMore file actions 451 lines (385 loc) · 17.4 KB / Copy pathmoduleobject.csFile metadata and controls451 lines (385 loc) · 17.4 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 // ========================================================================== // 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.Collections.Specialized; using System.Runtime.InteropServices; using System.Collections.Generic; using System.Collections; using System.Reflection; namespace Python.Runtime { //======================================================================== // Implements a Python type that provides access to CLR namespaces. The // type behaves like a Python module, and can contain other sub-modules. //======================================================================== internal class ModuleObject : ExtensionType { Dictionary<string, ManagedType> cache; internal string moduleName; internal IntPtr dict; protected string _namespace; public ModuleObject(string name) : base() { 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. string filename = "unknown"; string docstring = "Namespace containing types from the following assemblies:\n\n"; foreach (Assembly a in AssemblyManager.GetAssemblies(name)) { 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(this.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.Decref(pyname); Runtime.Decref(pyfilename); Runtime.Decref(pydocstring); Marshal.WriteIntPtr(this.pyHandle, ObjectOffset.DictOffset(this.pyHandle), dict); InitializeModuleMembers(); } //=================================================================== // 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. //=================================================================== public ManagedType GetAttribute(string name, bool guess) { ManagedType cached = null; this.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 (ManagedType) 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 (ManagedType) 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 (ManagedType) m; } type = AssemblyManager.LookupType(qname); if (type != null) { if (!type.IsPublic) { return null; } c = ClassManager.GetClass(type); StoreAttribute(name, c); return (ManagedType) 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; } //=================================================================== // Stores an attribute in the instance dict for future lookups. //=================================================================== private void StoreAttribute(string name, ManagedType ob) { Runtime.PyDict_SetItemString(dict, name, ob.pyHandle); cache[name] = ob; } //=================================================================== // 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. //=================================================================== public void LoadNames() { ManagedType m = null; foreach (string name in AssemblyManager.GetNames(_namespace)) { this.cache.TryGetValue(name, out m); if (m == null) { ManagedType attr = this.GetAttribute(name, true); if (Runtime.wrap_exceptions) { if (attr is ExceptionClassObject) { ExceptionClassObject c = attr as ExceptionClassObject; if (c != null) { IntPtr p = attr.pyHandle; IntPtr r =Exceptions.GetExceptionClassWrapper(p); Runtime.PyDict_SetItemString(dict, name, r); Runtime.Incref(r); } } } } } } /// <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 = this.GetType(); 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(funcmarker, false); object[] forbid = method.GetCustomAttributes(ftmarker, false); bool allow_threads = (forbid.Length == 0); if (attrs.Length > 0) { string name = method.Name; MethodInfo[] mi = new MethodInfo[1]; mi[0] = method; ModuleFunctionObject m = new ModuleFunctionObject(type, name, mi, allow_threads); StoreAttribute(name, m); } } PropertyInfo[] properties = type.GetProperties(); for (int i = 0; i < properties.Length; i++) { PropertyInfo property = properties[i]; object[] attrs = property.GetCustomAttributes(propmarker, false); if (attrs.Length > 0) { string name = property.Name; ModulePropertyObject p = new ModulePropertyObject(property); StoreAttribute(name, p); } } type = type.BaseType; } } //==================================================================== // 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. //==================================================================== public static IntPtr tp_getattro(IntPtr ob, IntPtr key) { ModuleObject 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.Incref(op); return op; } string name = Runtime.GetManagedString(key); if (name == "__dict__") { Runtime.Incref(self.dict); return self.dict; } ManagedType attr = self.GetAttribute(name, true); if (attr == null) { Exceptions.SetError(Exceptions.AttributeError, name); return IntPtr.Zero; } // XXX - hack required to recognize exception types. These types // may need to be wrapped in old-style class wrappers in versions // of Python where new-style classes cannot be used as exceptions. if (Runtime.wrap_exceptions) { if (attr is ExceptionClassObject) { ExceptionClassObject c = attr as ExceptionClassObject; if (c != null) { IntPtr p = attr.pyHandle; IntPtr r = Exceptions.GetExceptionClassWrapper(p); Runtime.PyDict_SetItemString(self.dict, name, r); Runtime.Incref(r); return r; } } } Runtime.Incref(attr.pyHandle); return attr.pyHandle; } //==================================================================== // ModuleObject __repr__ implementation. //==================================================================== public static IntPtr tp_repr(IntPtr ob) { ModuleObject self = (ModuleObject)GetManagedObject(ob); string s = String.Format("<module '{0}'>", self.moduleName); return Runtime.PyString_FromString(s); } } /// <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 = this.tpHandle; IntPtr mro = Marshal.ReadIntPtr(type, TypeOffset.tp_mro); IntPtr ext = Runtime.ExtendTuple(mro, Runtime.PyModuleType); Marshal.WriteIntPtr(type, TypeOffset.tp_mro, ext); Runtime.Decref(mro); hacked = true; } } /// <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; } } } [ModuleFunctionAttribute()] public static bool getPreload() { return preload; } [ModuleFunctionAttribute()] public static void setPreload(bool preloadFlag) { preload = preloadFlag; } //[ModulePropertyAttribute] public static bool SuppressDocs { get { return _SuppressDocs; } set { _SuppressDocs = value; } } //[ModulePropertyAttribute] public static bool SuppressOverloads { get { return _SuppressOverloads; } set { _SuppressOverloads = value; } } [ModuleFunctionAttribute()] [ForbidPythonThreadsAttribute()] 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) { string msg = String.Format("Unable to find assembly '{0}'.", name); throw new System.IO.FileNotFoundException(msg); } return assembly ; } [ModuleFunctionAttribute()] [ForbidPythonThreadsAttribute()] public static string FindAssembly(string name) { AssemblyManager.UpdatePath(); return AssemblyManager.FindAssembly(name); } [ModuleFunctionAttribute()] public static String[] ListAssemblies(bool verbose) { AssemblyName[] assnames = AssemblyManager.ListAssemblies(); String[] names = new String[assnames.Length]; for (int i = 0; i < assnames.Length; i++) { if (verbose) names[i] = assnames[i].FullName; else names[i] = assnames[i].Name; } return names; } [ModuleFunctionAttribute()] public static int _AtExit() { return Runtime.AtExit(); } } } |
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