summaryrefslogtreecommitdiff
path: root/Modules/xxsubtype.c
blob: 8d0d6ae81493ad25ff5e2c9f3f58d681392b17fe (plain)
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
#include "Python.h"
#include "structmember.h"

PyDoc_STRVAR(xxsubtype__doc__,
"xxsubtype is an example module showing how to subtype builtin types from C.\n"
"test_descr.py in the standard test suite requires it in order to complete.\n"
"If you don't care about the examples, and don't intend to run the Python\n"
"test suite, you can recompile Python without Modules/xxsubtype.c.");

/* We link this module statically for convenience.  If compiled as a shared
   library instead, some compilers don't allow addresses of Python objects
   defined in other libraries to be used in static initializers here.  The
   DEFERRED_ADDRESS macro is used to tag the slots where such addresses
   appear; the module init function must fill in the tagged slots at runtime.
   The argument is for documentation -- the macro ignores it.
*/
#define DEFERRED_ADDRESS(ADDR) 0

/* spamlist -- a list subtype */

typedef struct {
    PyListObject list;
    int state;
} spamlistobject;

static PyObject *
spamlist_getstate(spamlistobject *self, PyObject *args)
{
    if (!PyArg_ParseTuple(args, ":getstate"))
        return NULL;
    return PyLong_FromLong(self->state);
}

static PyObject *
spamlist_setstate(spamlistobject *self, PyObject *args)
{
    int state;

    if (!PyArg_ParseTuple(args, "i:setstate", &state))
        return NULL;
    self->state = state;
    Py_INCREF(Py_None);
    return Py_None;
}

static PyObject *
spamlist_specialmeth(PyObject *self, PyObject *args, PyObject *kw)
{
    PyObject *result = PyTuple_New(3);

    if (result != NULL) {
        if (self == NULL)
            self = Py_None;
        if (kw == NULL)
            kw = Py_None;
        Py_INCREF(self);
        PyTuple_SET_ITEM(result, 0, self);
        Py_INCREF(args);
        PyTuple_SET_ITEM(result, 1, args);
        Py_INCREF(kw);
        PyTuple_SET_ITEM(result, 2, kw);
    }
    return result;
}

static PyMethodDef spamlist_methods[] = {
    {"getstate", (PyCFunction)spamlist_getstate, METH_VARARGS,
        PyDoc_STR("getstate() -> state")},
    {"setstate", (PyCFunction)spamlist_setstate, METH_VARARGS,
        PyDoc_STR("setstate(state)")},
    /* These entries differ only in the flags; they are used by the tests
       in test.test_descr. */
    {"classmeth", (PyCFunction)spamlist_specialmeth,
        METH_VARARGS | METH_KEYWORDS | METH_CLASS,
        PyDoc_STR("classmeth(*args, **kw)")},
    {"staticmeth", (PyCFunction)spamlist_specialmeth,
        METH_VARARGS | METH_KEYWORDS | METH_STATIC,
        PyDoc_STR("staticmeth(*args, **kw)")},
    {NULL,      NULL},
};

static int
spamlist_init(spamlistobject *self, PyObject *args, PyObject *kwds)
{
    if (PyList_Type.tp_init((PyObject *)self, args, kwds) < 0)
        return -1;
    self->state = 0;
    return 0;
}

static PyObject *
spamlist_state_get(spamlistobject *self)
{
    return PyLong_FromLong(self->state);
}

static PyGetSetDef spamlist_getsets[] = {
    {"state", (getter)spamlist_state_get, NULL,
     PyDoc_STR("an int variable for demonstration purposes")},
    {0}
};

static PyTypeObject spamlist_type = {
    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
    "xxsubtype.spamlist",
    sizeof(spamlistobject),
    0,
    0,                                          /* tp_dealloc */
    0,                                          /* tp_print */
    0,                                          /* tp_getattr */
    0,                                          /* tp_setattr */
    0,                                          /* tp_reserved */
    0,                                          /* tp_repr */
    0,                                          /* tp_as_number */
    0,                                          /* tp_as_sequence */
    0,                                          /* tp_as_mapping */
    0,                                          /* tp_hash */
    0,                                          /* tp_call */
    0,                                          /* tp_str */
    0,                                          /* tp_getattro */
    0,                                          /* tp_setattro */
    0,                                          /* tp_as_buffer */
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
    0,                                          /* tp_doc */
    0,                                          /* tp_traverse */
    0,                                          /* tp_clear */
    0,                                          /* tp_richcompare */
    0,                                          /* tp_weaklistoffset */
    0,                                          /* tp_iter */
    0,                                          /* tp_iternext */
    spamlist_methods,                           /* tp_methods */
    0,                                          /* tp_members */
    spamlist_getsets,                           /* tp_getset */
    DEFERRED_ADDRESS(&PyList_Type),             /* tp_base */
    0,                                          /* tp_dict */
    0,                                          /* tp_descr_get */
    0,                                          /* tp_descr_set */
    0,                                          /* tp_dictoffset */
    (initproc)spamlist_init,                    /* tp_init */
    0,                                          /* tp_alloc */
    0,                                          /* tp_new */
};

/* spamdict -- a dict subtype */

typedef struct {
    PyDictObject dict;
    int state;
} spamdictobject;

static PyObject *
spamdict_getstate(spamdictobject *self, PyObject *args)
{
    if (!PyArg_ParseTuple(args, ":getstate"))
        return NULL;
    return PyLong_FromLong(self->state);
}

static PyObject *
spamdict_setstate(spamdictobject *self, PyObject *args)
{
    int state;

    if (!PyArg_ParseTuple(args, "i:setstate", &state))
        return NULL;
    self->state = state;
    Py_INCREF(Py_None);
    return Py_None;
}

static PyMethodDef spamdict_methods[] = {
    {"getstate", (PyCFunction)spamdict_getstate, METH_VARARGS,
        PyDoc_STR("getstate() -> state")},
    {"setstate", (PyCFunction)spamdict_setstate, METH_VARARGS,
        PyDoc_STR("setstate(state)")},
    {NULL,      NULL},
};

static int
spamdict_init(spamdictobject *self, PyObject *args, PyObject *kwds)
{
    if (PyDict_Type.tp_init((PyObject *)self, args, kwds) < 0)
        return -1;
    self->state = 0;
    return 0;
}

static PyMemberDef spamdict_members[] = {
    {"state", T_INT, offsetof(spamdictobject, state), READONLY,
     PyDoc_STR("an int variable for demonstration purposes")},
    {0}
};

static PyTypeObject spamdict_type = {
    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
    "xxsubtype.spamdict",
    sizeof(spamdictobject),
    0,
    0,                                          /* tp_dealloc */
    0,                                          /* tp_print */
    0,                                          /* tp_getattr */
    0,                                          /* tp_setattr */
    0,                                          /* tp_reserved */
    0,                                          /* tp_repr */
    0,                                          /* tp_as_number */
    0,                                          /* tp_as_sequence */
    0,                                          /* tp_as_mapping */
    0,                                          /* tp_hash */
    0,                                          /* tp_call */
    0,                                          /* tp_str */
    0,                                          /* tp_getattro */
    0,                                          /* tp_setattro */
    0,                                          /* tp_as_buffer */
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
    0,                                          /* tp_doc */
    0,                                          /* tp_traverse */
    0,                                          /* tp_clear */
    0,                                          /* tp_richcompare */
    0,                                          /* tp_weaklistoffset */
    0,                                          /* tp_iter */
    0,                                          /* tp_iternext */
    spamdict_methods,                           /* tp_methods */
    spamdict_members,                           /* tp_members */
    0,                                          /* tp_getset */
    DEFERRED_ADDRESS(&PyDict_Type),             /* tp_base */
    0,                                          /* tp_dict */
    0,                                          /* tp_descr_get */
    0,                                          /* tp_descr_set */
    0,                                          /* tp_dictoffset */
    (initproc)spamdict_init,                    /* tp_init */
    0,                                          /* tp_alloc */
    0,                                          /* tp_new */
};

static PyObject *
spam_bench(PyObject *self, PyObject *args)
{
    PyObject *obj, *name, *res;
    int n = 1000;
    time_t t0, t1;

    if (!PyArg_ParseTuple(args, "OS|i", &obj, &name, &n))
        return NULL;
    t0 = clock();
    while (--n >= 0) {
        res = PyObject_GetAttr(obj, name);
        if (res == NULL)
            return NULL;
        Py_DECREF(res);
    }
    t1 = clock();
    return PyFloat_FromDouble((double)(t1-t0) / CLOCKS_PER_SEC);
}

static PyMethodDef xxsubtype_functions[] = {
    {"bench",           spam_bench,     METH_VARARGS},
    {NULL,              NULL}           /* sentinel */
};

static int
xxsubtype_exec(PyObject* m)
{
    /* Fill in deferred data addresses.  This must be done before
       PyType_Ready() is called.  Note that PyType_Ready() automatically
       initializes the ob.ob_type field to &PyType_Type if it's NULL,
       so it's not necessary to fill in ob_type first. */
    spamdict_type.tp_base = &PyDict_Type;
    if (PyType_Ready(&spamdict_type) < 0)
        return -1;

    spamlist_type.tp_base = &PyList_Type;
    if (PyType_Ready(&spamlist_type) < 0)
        return -1;

    if (PyType_Ready(&spamlist_type) < 0)
        return -1;
    if (PyType_Ready(&spamdict_type) < 0)
        return -1;

    Py_INCREF(&spamlist_type);
    if (PyModule_AddObject(m, "spamlist",
                           (PyObject *) &spamlist_type) < 0)
        return -1;

    Py_INCREF(&spamdict_type);
    if (PyModule_AddObject(m, "spamdict",
                           (PyObject *) &spamdict_type) < 0)
        return -1;
    return 0;
}

static struct PyModuleDef_Slot xxsubtype_slots[] = {
    {Py_mod_exec, xxsubtype_exec},
    {0, NULL},
};

static struct PyModuleDef xxsubtypemodule = {
    PyModuleDef_HEAD_INIT,
    "xxsubtype",
    xxsubtype__doc__,
    0,
    xxsubtype_functions,
    xxsubtype_slots,
    NULL,
    NULL,
    NULL
};


PyMODINIT_FUNC
PyInit_xxsubtype(void)
{
    return PyModuleDef_Init(&xxsubtypemodule);
}