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Guido van Rossuma3309961993-07-28 09:05:47 +00001#ifndef Py_OBJIMPL_H
2#define Py_OBJIMPL_H
3#ifdef __cplusplus
4extern "C" {
5#endif
6
Guido van Rossumf70e43a1991-02-19 12:39:46 +00007/***********************************************************
Guido van Rossum5799b521995-01-04 19:06:22 +00008Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
9The Netherlands.
Guido van Rossumf70e43a1991-02-19 12:39:46 +000010
11 All Rights Reserved
12
Guido van Rossumd266eb41996-10-25 14:44:06 +000013Permission to use, copy, modify, and distribute this software and its
14documentation for any purpose and without fee is hereby granted,
Guido van Rossumf70e43a1991-02-19 12:39:46 +000015provided that the above copyright notice appear in all copies and that
Guido van Rossumd266eb41996-10-25 14:44:06 +000016both that copyright notice and this permission notice appear in
Guido van Rossumf70e43a1991-02-19 12:39:46 +000017supporting documentation, and that the names of Stichting Mathematisch
Guido van Rossumd266eb41996-10-25 14:44:06 +000018Centrum or CWI or Corporation for National Research Initiatives or
19CNRI not be used in advertising or publicity pertaining to
20distribution of the software without specific, written prior
21permission.
Guido van Rossumf70e43a1991-02-19 12:39:46 +000022
Guido van Rossumd266eb41996-10-25 14:44:06 +000023While CWI is the initial source for this software, a modified version
24is made available by the Corporation for National Research Initiatives
25(CNRI) at the Internet address ftp://ftp.python.org.
26
27STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
28REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
29MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
30CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
31DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
32PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
33TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
34PERFORMANCE OF THIS SOFTWARE.
Guido van Rossumf70e43a1991-02-19 12:39:46 +000035
36******************************************************************/
37
Guido van Rossum85a5fbb1990-10-14 12:07:46 +000038/*
Guido van Rossum85a5fbb1990-10-14 12:07:46 +000039Additional macros for modules that implement new object types.
40You must first include "object.h".
41
Guido van Rossumcaa63801995-01-12 11:45:45 +000042PyObject_NEW(type, typeobj) allocates memory for a new object of the given
Guido van Rossum85a5fbb1990-10-14 12:07:46 +000043type; here 'type' must be the C structure type used to represent the
44object and 'typeobj' the address of the corresponding type object.
45Reference count and type pointer are filled in; the rest of the bytes of
46the object are *undefined*! The resulting expression type is 'type *'.
47The size of the object is actually determined by the tp_basicsize field
48of the type object.
49
Guido van Rossumcaa63801995-01-12 11:45:45 +000050PyObject_NEW_VAR(type, typeobj, n) is similar but allocates a variable-size
51object with n extra items. The size is computed as tp_basicsize plus
Guido van Rossum85a5fbb1990-10-14 12:07:46 +000052n * tp_itemsize. This fills in the ob_size field as well.
53*/
54
Guido van Rossum5a849141996-07-21 02:23:54 +000055#ifndef MS_COREDLL
Guido van Rossum43466ec1998-12-04 18:48:25 +000056extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *));
57extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int));
Guido van Rossum85a5fbb1990-10-14 12:07:46 +000058
Guido van Rossumcaa63801995-01-12 11:45:45 +000059#define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj))
60#define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n))
Guido van Rossuma3309961993-07-28 09:05:47 +000061
Guido van Rossum5a849141996-07-21 02:23:54 +000062#else
63/* For an MS-Windows DLL, we change the way an object is created, so that the
64 extension module's malloc is used, rather than the core DLL malloc, as there is
65 no guarantee they will use the same heap
66*/
Guido van Rossum43466ec1998-12-04 18:48:25 +000067extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *, PyObject *));
68extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int, PyVarObject *));
Guido van Rossum5a849141996-07-21 02:23:54 +000069
70#define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj,(PyObject *)malloc((typeobj)->tp_basicsize)))
Guido van Rossumd0c87ee1997-05-15 21:31:03 +000071#define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n, (PyVarObject *)malloc((typeobj)->tp_basicsize + n * (typeobj)->tp_itemsize)))
Guido van Rossum5a849141996-07-21 02:23:54 +000072
73#endif /* MS_COREDLL */
74
Guido van Rossuma3309961993-07-28 09:05:47 +000075#ifdef __cplusplus
76}
77#endif
78#endif /* !Py_OBJIMPL_H */