This repository was archived by the owner on Jul 22, 2023. It is now read-only.
forked from pythonnet/pythonnet
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmanagedtype.cs
More file actions
264 lines (233 loc) · 7.65 KB
/
managedtype.cs
File metadata and controls
264 lines (233 loc) · 7.65 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
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Linq;
namespace Python.Runtime
{
/// <summary>
/// Common base class for all objects that are implemented in managed
/// code. It defines the common fields that associate CLR and Python
/// objects and common utilities to convert between those identities.
/// </summary>
[Serializable]
internal abstract class ManagedType
{
internal enum TrackTypes
{
Untrack,
Extension,
Wrapper,
}
[NonSerialized]
internal GCHandle gcHandle; // Native handle
internal IntPtr pyHandle; // PyObject *
internal IntPtr tpHandle; // PyType *
private static readonly Dictionary<ManagedType, TrackTypes> _managedObjs = new Dictionary<ManagedType, TrackTypes>();
internal void IncrRefCount()
{
Runtime.XIncref(pyHandle);
}
internal void DecrRefCount()
{
Runtime.XDecref(pyHandle);
}
internal long RefCount
{
get
{
var gs = Runtime.PyGILState_Ensure();
try
{
return Runtime.Refcount(pyHandle);
}
finally
{
Runtime.PyGILState_Release(gs);
}
}
}
internal GCHandle AllocGCHandle(TrackTypes track = TrackTypes.Untrack)
{
gcHandle = GCHandle.Alloc(this);
if (track != TrackTypes.Untrack)
{
_managedObjs.Add(this, track);
}
return gcHandle;
}
internal void FreeGCHandle()
{
_managedObjs.Remove(this);
if (gcHandle.IsAllocated)
{
gcHandle.Free();
gcHandle = default;
}
}
internal static ManagedType GetManagedObject(BorrowedReference ob)
=> GetManagedObject(ob.DangerousGetAddress());
/// <summary>
/// Given a Python object, return the associated managed object or null.
/// </summary>
internal static ManagedType GetManagedObject(IntPtr ob)
{
if (ob != IntPtr.Zero)
{
IntPtr tp = Runtime.PyObject_TYPE(ob);
if (tp == Runtime.PyTypeType || tp == Runtime.PyCLRMetaType)
{
tp = ob;
}
var flags = Util.ReadCLong(tp, TypeOffset.tp_flags);
if ((flags & TypeFlags.Managed) != 0)
{
IntPtr op = tp == ob
? Marshal.ReadIntPtr(tp, TypeOffset.magic())
: Marshal.ReadIntPtr(ob, ObjectOffset.magic(tp));
if (op == IntPtr.Zero)
{
return null;
}
var gc = (GCHandle)op;
return (ManagedType)gc.Target;
}
}
return null;
}
/// <summary>
/// Given a Python object, return the associated managed object type or null.
/// </summary>
internal static ManagedType GetManagedObjectType(IntPtr ob)
{
if (ob != IntPtr.Zero)
{
IntPtr tp = Runtime.PyObject_TYPE(ob);
var flags = Util.ReadCLong(tp, TypeOffset.tp_flags);
if ((flags & TypeFlags.Managed) != 0)
{
tp = Marshal.ReadIntPtr(tp, TypeOffset.magic());
var gc = (GCHandle)tp;
return (ManagedType)gc.Target;
}
}
return null;
}
internal static ManagedType GetManagedObjectErr(IntPtr ob)
{
ManagedType result = GetManagedObject(ob);
if (result == null)
{
Exceptions.SetError(Exceptions.TypeError, "invalid argument, expected CLR type");
}
return result;
}
internal static bool IsManagedType(IntPtr ob)
{
if (ob != IntPtr.Zero)
{
IntPtr tp = Runtime.PyObject_TYPE(ob);
if (tp == Runtime.PyTypeType || tp == Runtime.PyCLRMetaType)
{
tp = ob;
}
var flags = Util.ReadCLong(tp, TypeOffset.tp_flags);
if ((flags & TypeFlags.Managed) != 0)
{
return true;
}
}
return false;
}
public bool IsTypeObject()
{
return pyHandle == tpHandle;
}
internal static IDictionary<ManagedType, TrackTypes> GetManagedObjects()
{
return _managedObjs;
}
internal static void ClearTrackedObjects()
{
_managedObjs.Clear();
}
internal static int PyVisit(IntPtr ob, IntPtr visit, IntPtr arg)
{
if (ob == IntPtr.Zero)
{
return 0;
}
var visitFunc = NativeCall.GetDelegate<Interop.ObjObjFunc>(visit);
return visitFunc(ob, arg);
}
/// <summary>
/// Wrapper for calling tp_clear
/// </summary>
internal void CallTypeClear()
{
if (tpHandle == IntPtr.Zero || pyHandle == IntPtr.Zero)
{
return;
}
var clearPtr = Marshal.ReadIntPtr(tpHandle, TypeOffset.tp_clear);
if (clearPtr == IntPtr.Zero)
{
return;
}
var clearFunc = NativeCall.GetDelegate<Interop.InquiryFunc>(clearPtr);
clearFunc(pyHandle);
}
/// <summary>
/// Wrapper for calling tp_traverse
/// </summary>
internal void CallTypeTraverse(Interop.ObjObjFunc visitproc, IntPtr arg)
{
if (tpHandle == IntPtr.Zero || pyHandle == IntPtr.Zero)
{
return;
}
var traversePtr = Marshal.ReadIntPtr(tpHandle, TypeOffset.tp_traverse);
if (traversePtr == IntPtr.Zero)
{
return;
}
var traverseFunc = NativeCall.GetDelegate<Interop.ObjObjArgFunc>(traversePtr);
var visiPtr = Marshal.GetFunctionPointerForDelegate(visitproc);
traverseFunc(pyHandle, visiPtr, arg);
}
protected void TypeClear()
{
ClearObjectDict(pyHandle);
}
internal void Save(InterDomainContext context)
{
OnSave(context);
}
internal void Load(InterDomainContext context)
{
OnLoad(context);
}
protected virtual void OnSave(InterDomainContext context) { }
protected virtual void OnLoad(InterDomainContext context) { }
protected static void ClearObjectDict(IntPtr ob)
{
IntPtr dict = GetObjectDict(ob);
if (dict == IntPtr.Zero)
{
return;
}
SetObjectDict(ob, IntPtr.Zero);
Runtime.XDecref(dict);
}
protected static IntPtr GetObjectDict(IntPtr ob)
{
IntPtr type = Runtime.PyObject_TYPE(ob);
return Marshal.ReadIntPtr(ob, ObjectOffset.TypeDictOffset(type));
}
protected static void SetObjectDict(IntPtr ob, IntPtr value)
{
IntPtr type = Runtime.PyObject_TYPE(ob);
Marshal.WriteIntPtr(ob, ObjectOffset.TypeDictOffset(type), value);
}
}
}