pytalloc.c 8.5 KB
Newer Older
1 2
/* 
   Unix SMB/CIFS implementation.
3
   Python Talloc Module
4
   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2010-2011
5

6 7 8 9
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
10

11 12 13 14
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
15

16 17 18 19 20 21
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <Python.h>
#include <talloc.h>
22
#include <pytalloc.h>
23
#include "pytalloc_private.h"
24

25 26 27 28 29 30 31
static PyTypeObject TallocObject_Type;

#if PY_MAJOR_VERSION >= 3
#define PyStr_FromFormat PyUnicode_FromFormat
#else
#define PyStr_FromFormat PyString_FromFormat
#endif
32

33
/* print a talloc tree report for a talloc python object */
34
static PyObject *pytalloc_report_full(PyObject *self, PyObject *args)
35
{
36
	PyObject *py_obj = Py_None;
37

38
	if (!PyArg_ParseTuple(args, "|O", &py_obj))
39
		return NULL;
40 41 42 43

	if (py_obj == Py_None) {
		talloc_report_full(NULL, stdout);
	} else {
44
		talloc_report_full(pytalloc_get_mem_ctx(py_obj), stdout);
45
	}
46
	return Py_None;
47 48
}

49
/* enable null tracking */
50
static PyObject *pytalloc_enable_null_tracking(PyObject *self)
51 52 53 54
{
	talloc_enable_null_tracking();
	return Py_None;
}
55

56
/* return the number of talloc blocks */
57
static PyObject *pytalloc_total_blocks(PyObject *self, PyObject *args)
58
{
59 60 61
	PyObject *py_obj = Py_None;

	if (!PyArg_ParseTuple(args, "|O", &py_obj))
62
		return NULL;
63 64 65

	if (py_obj == Py_None) {
		return PyLong_FromLong(talloc_total_blocks(NULL));
66 67
	}

68
	return PyLong_FromLong(talloc_total_blocks(pytalloc_get_mem_ctx(py_obj)));
69 70
}

71
static PyMethodDef talloc_methods[] = {
72
	{ "report_full", (PyCFunction)pytalloc_report_full, METH_VARARGS,
73
		"show a talloc tree for an object"},
74
	{ "enable_null_tracking", (PyCFunction)pytalloc_enable_null_tracking, METH_NOARGS,
75
		"enable tracking of the NULL object"},
76
	{ "total_blocks", (PyCFunction)pytalloc_total_blocks, METH_VARARGS,
77 78 79
		"return talloc block count"},
	{ NULL }
};
80

81 82 83
/**
 * Default (but only slightly more useful than the default) implementation of Repr().
 */
84
static PyObject *pytalloc_default_repr(PyObject *obj)
85
{
86
	pytalloc_Object *talloc_obj = (pytalloc_Object *)obj;
87 88
	PyTypeObject *type = (PyTypeObject*)PyObject_Type(obj);

89 90
	return PyStr_FromFormat("<%s talloc object at 0x%p>",
				type->tp_name, talloc_obj->ptr);
91 92 93 94 95
}

/**
 * Simple dealloc for talloc-wrapping PyObjects
 */
96
static void pytalloc_dealloc(PyObject* self)
97
{
98
	pytalloc_Object *obj = (pytalloc_Object *)self;
99 100 101 102 103 104 105 106
	assert(talloc_unlink(NULL, obj->talloc_ctx) != -1);
	obj->talloc_ctx = NULL;
	self->ob_type->tp_free(self);
}

/**
 * Default (but only slightly more useful than the default) implementation of cmp.
 */
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
#if PY_MAJOR_VERSION >= 3
static PyObject *pytalloc_default_richcmp(PyObject *obj1, PyObject *obj2, int op)
{
	void *ptr1;
	void *ptr2;
	if (Py_TYPE(obj1) == Py_TYPE(obj2)) {
		/* When types match, compare pointers */
		ptr1 = pytalloc_get_ptr(obj1);
		ptr2 = pytalloc_get_ptr(obj2);
	} else if (PyObject_TypeCheck(obj2, &TallocObject_Type)) {
		/* Otherwise, compare types */
		ptr1 = Py_TYPE(obj1);
		ptr2 = Py_TYPE(obj2);
	} else {
		Py_INCREF(Py_NotImplemented);
		return Py_NotImplemented;
	}
	switch (op) {
		case Py_EQ: return PyBool_FromLong(ptr1 == ptr2);
		case Py_NE: return PyBool_FromLong(ptr1 != ptr2);
		case Py_LT: return PyBool_FromLong(ptr1 < ptr2);
		case Py_GT: return PyBool_FromLong(ptr1 > ptr2);
		case Py_LE: return PyBool_FromLong(ptr1 <= ptr2);
		case Py_GE: return PyBool_FromLong(ptr1 >= ptr2);
	}
	Py_INCREF(Py_NotImplemented);
	return Py_NotImplemented;
}
#else
136
static int pytalloc_default_cmp(PyObject *_obj1, PyObject *_obj2)
137
{
138 139
	pytalloc_Object *obj1 = (pytalloc_Object *)_obj1,
					 *obj2 = (pytalloc_Object *)_obj2;
140
	if (obj1->ob_type != obj2->ob_type)
141
		return ((char *)obj1->ob_type - (char *)obj2->ob_type);
142

143
	return ((char *)pytalloc_get_ptr(obj1) - (char *)pytalloc_get_ptr(obj2));
144
}
145
#endif
146 147 148

static PyTypeObject TallocObject_Type = {
	.tp_name = "talloc.Object",
149
	.tp_doc = "Python wrapper for a talloc-maintained object.",
150 151
	.tp_basicsize = sizeof(pytalloc_Object),
	.tp_dealloc = (destructor)pytalloc_dealloc,
152
	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
153
	.tp_repr = pytalloc_default_repr,
154 155 156
#if PY_MAJOR_VERSION >= 3
	.tp_richcompare = pytalloc_default_richcmp,
#else
157
	.tp_compare = pytalloc_default_cmp,
158
#endif
159 160
};

161 162 163 164 165 166 167 168
/**
 * Default (but only slightly more useful than the default) implementation of Repr().
 */
static PyObject *pytalloc_base_default_repr(PyObject *obj)
{
	pytalloc_BaseObject *talloc_obj = (pytalloc_BaseObject *)obj;
	PyTypeObject *type = (PyTypeObject*)PyObject_Type(obj);

169
	return PyStr_FromFormat("<%s talloc based object at %p>",
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
				type->tp_name, talloc_obj->ptr);
}

/**
 * Simple dealloc for talloc-wrapping PyObjects
 */
static void pytalloc_base_dealloc(PyObject* self)
{
	pytalloc_BaseObject *obj = (pytalloc_BaseObject *)self;
	assert(talloc_unlink(NULL, obj->talloc_ctx) != -1);
	obj->talloc_ctx = NULL;
	self->ob_type->tp_free(self);
}

/**
 * Default (but only slightly more useful than the default) implementation of cmp.
 */
#if PY_MAJOR_VERSION >= 3
static PyObject *pytalloc_base_default_richcmp(PyObject *obj1, PyObject *obj2, int op)
{
	void *ptr1;
	void *ptr2;
	if (Py_TYPE(obj1) == Py_TYPE(obj2)) {
		/* When types match, compare pointers */
		ptr1 = pytalloc_get_ptr(obj1);
		ptr2 = pytalloc_get_ptr(obj2);
	} else if (PyObject_TypeCheck(obj2, &TallocObject_Type)) {
		/* Otherwise, compare types */
		ptr1 = Py_TYPE(obj1);
		ptr2 = Py_TYPE(obj2);
	} else {
		Py_INCREF(Py_NotImplemented);
		return Py_NotImplemented;
	}
	switch (op) {
		case Py_EQ: return PyBool_FromLong(ptr1 == ptr2);
		case Py_NE: return PyBool_FromLong(ptr1 != ptr2);
		case Py_LT: return PyBool_FromLong(ptr1 < ptr2);
		case Py_GT: return PyBool_FromLong(ptr1 > ptr2);
		case Py_LE: return PyBool_FromLong(ptr1 <= ptr2);
		case Py_GE: return PyBool_FromLong(ptr1 >= ptr2);
	}
	Py_INCREF(Py_NotImplemented);
	return Py_NotImplemented;
}
#else
static int pytalloc_base_default_cmp(PyObject *_obj1, PyObject *_obj2)
{
	pytalloc_BaseObject *obj1 = (pytalloc_BaseObject *)_obj1,
					 *obj2 = (pytalloc_BaseObject *)_obj2;
	if (obj1->ob_type != obj2->ob_type)
		return ((char *)obj1->ob_type - (char *)obj2->ob_type);

	return ((char *)pytalloc_get_ptr(obj1) - (char *)pytalloc_get_ptr(obj2));
}
#endif

static PyTypeObject TallocBaseObject_Type = {
	.tp_name = "talloc.BaseObject",
	.tp_doc = "Python wrapper for a talloc-maintained object.",
	.tp_basicsize = sizeof(pytalloc_BaseObject),
	.tp_dealloc = (destructor)pytalloc_base_dealloc,
	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
	.tp_repr = pytalloc_base_default_repr,
#if PY_MAJOR_VERSION >= 3
	.tp_richcompare = pytalloc_base_default_richcmp,
#else
	.tp_compare = pytalloc_base_default_cmp,
#endif
};

241 242 243 244 245 246 247 248
static PyTypeObject TallocGenericObject_Type = {
	.tp_name = "talloc.GenericObject",
	.tp_doc = "Python wrapper for a talloc-maintained object.",
	.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
	.tp_base = &TallocBaseObject_Type,
	.tp_basicsize = sizeof(pytalloc_BaseObject),
};

249 250 251 252 253 254 255 256 257 258 259 260 261 262
#define MODULE_DOC PyDoc_STR("Python wrapping of talloc-maintained objects.")

#if PY_MAJOR_VERSION >= 3
static struct PyModuleDef moduledef = {
    PyModuleDef_HEAD_INIT,
    .m_name = "talloc",
    .m_doc = MODULE_DOC,
    .m_size = -1,
    .m_methods = talloc_methods,
};
#endif

static PyObject *module_init(void);
static PyObject *module_init(void)
263
{
264 265
	PyObject *m;

266
	if (PyType_Ready(&TallocObject_Type) < 0)
267
		return NULL;
268

269 270 271
	if (PyType_Ready(&TallocBaseObject_Type) < 0)
		return NULL;

272 273 274
	if (PyType_Ready(&TallocGenericObject_Type) < 0)
		return NULL;

275 276 277 278 279
#if PY_MAJOR_VERSION >= 3
	m = PyModule_Create(&moduledef);
#else
	m = Py_InitModule3("talloc", talloc_methods, MODULE_DOC);
#endif
280
	if (m == NULL)
281
		return NULL;
282 283 284

	Py_INCREF(&TallocObject_Type);
	PyModule_AddObject(m, "Object", (PyObject *)&TallocObject_Type);
285 286
	Py_INCREF(&TallocBaseObject_Type);
	PyModule_AddObject(m, "BaseObject", (PyObject *)&TallocBaseObject_Type);
287 288
	Py_INCREF(&TallocGenericObject_Type);
	PyModule_AddObject(m, "GenericObject", (PyObject *)&TallocGenericObject_Type);
289 290 291 292 293 294 295 296 297 298 299 300 301 302
	return m;
}

#if PY_MAJOR_VERSION >= 3
PyMODINIT_FUNC PyInit_talloc(void);
PyMODINIT_FUNC PyInit_talloc(void)
{
	return module_init();
}
#else
void inittalloc(void);
void inittalloc(void)
{
	module_init();
303
}
304
#endif