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annotate Include/objimpl.h @ 12357:5b59ea41db4e legacy-trunk

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Install the docs (with fewer rules). Add descriptions for the system variables.
author Guido van Rossum <guido@python.org>
date Mon, 10 Apr 2000 19:36:27 +0000
parents e82a9633078b
children 1c7c2dd1beb1
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1 #ifndef Py_OBJIMPL_H
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2 #define Py_OBJIMPL_H
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3 #ifdef __cplusplus
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4 extern "C" {
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5 #endif
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6
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7 /***********************************************************
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8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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9 The Netherlands.
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10
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11 All Rights Reserved
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12
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13 Permission to use, copy, modify, and distribute this software and its
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14 documentation for any purpose and without fee is hereby granted,
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15 provided that the above copyright notice appear in all copies and that
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16 both that copyright notice and this permission notice appear in
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17 supporting documentation, and that the names of Stichting Mathematisch
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18 Centrum or CWI or Corporation for National Research Initiatives or
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19 CNRI not be used in advertising or publicity pertaining to
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20 distribution of the software without specific, written prior
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21 permission.
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22
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23 While CWI is the initial source for this software, a modified version
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24 is made available by the Corporation for National Research Initiatives
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25 (CNRI) at the Internet address ftp://ftp.python.org.
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26
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27 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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28 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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29 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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30 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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31 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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32 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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33 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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34 PERFORMANCE OF THIS SOFTWARE.
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35
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36 ******************************************************************/
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37
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38 /*
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39 Additional macros for modules that implement new object types.
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40 You must first include "object.h".
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41
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42 PyObject_NEW(type, typeobj) allocates memory for a new object of the given
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43 type; here 'type' must be the C structure type used to represent the
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44 object and 'typeobj' the address of the corresponding type object.
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45 Reference count and type pointer are filled in; the rest of the bytes of
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46 the object are *undefined*! The resulting expression type is 'type *'.
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47 The size of the object is actually determined by the tp_basicsize field
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48 of the type object.
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49
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50 PyObject_NEW_VAR(type, typeobj, n) is similar but allocates a variable-size
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51 object with n extra items. The size is computed as tp_basicsize plus
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52 n * tp_itemsize. This fills in the ob_size field as well.
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53 */
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55 #ifndef MS_COREDLL
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56 extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *));
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57 extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int));
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59 #define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj))
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60 #define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n))
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62 #else
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63 /* For an MS-Windows DLL, we change the way an object is created, so that the
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64 extension module's malloc is used, rather than the core DLL malloc, as there is
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65 no guarantee they will use the same heap
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66 */
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67 extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *, PyObject *));
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68 extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int, PyVarObject *));
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69
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70 #define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj,(PyObject *)malloc((typeobj)->tp_basicsize)))
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71 #define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n, (PyVarObject *)malloc((typeobj)->tp_basicsize + n * (typeobj)->tp_itemsize)))
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72
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73 #endif /* MS_COREDLL */
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75 #ifdef __cplusplus
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76 }
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77 #endif
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78 #endif /* !Py_OBJIMPL_H */