Include/objimpl.h

   1 #ifndef Py_OBJIMPL_H
   2 #define Py_OBJIMPL_H
   3 #ifdef __cplusplus
   4 extern "C" {
   5 #endif
   6
   7 /***********************************************************
   8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
   9 The Netherlands.
  10
  11                         All Rights Reserved
  12
  13 Permission to use, copy, modify, and distribute this software and its
  14 documentation for any purpose and without fee is hereby granted,
  15 provided that the above copyright notice appear in all copies and that
  16 both that copyright notice and this permission notice appear in
  17 supporting documentation, and that the names of Stichting Mathematisch
  18 Centrum or CWI or Corporation for National Research Initiatives or
  19 CNRI not be used in advertising or publicity pertaining to
  20 distribution of the software without specific, written prior
  21 permission.
  22
  23 While CWI is the initial source for this software, a modified version
  24 is made available by the Corporation for National Research Initiatives
  25 (CNRI) at the Internet address ftp://ftp.python.org.
  26
  27 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
  28 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
  29 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
  30 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
  31 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  32 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  33 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  34 PERFORMANCE OF THIS SOFTWARE.
  35
  36 ******************************************************************/
  37
  38 /*
  39 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
  40
  41 Additional macros for modules that implement new object types.
  42 You must first include "object.h".
  43
  44 PyObject_NEW(type, typeobj) allocates memory for a new object of the given
  45 type; here 'type' must be the C structure type used to represent the
  46 object and 'typeobj' the address of the corresponding type object.
  47 Reference count and type pointer are filled in; the rest of the bytes of
  48 the object are *undefined*!  The resulting expression type is 'type *'.
  49 The size of the object is actually determined by the tp_basicsize field
  50 of the type object.
  51
  52 PyObject_NEW_VAR(type, typeobj, n) is similar but allocates a variable-size
  53 object with n extra items.  The size is computed as tp_basicsize plus
  54 n * tp_itemsize.  This fills in the ob_size field as well.
  55 */
  56
  57 #ifndef MS_COREDLL
  58 extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *));
  59 extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int));
  60
  61 #define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj))
  62 #define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n))
  63
  64 #else
  65 /* For an MS-Windows DLL, we change the way an object is created, so that the
  66    extension module's malloc is used, rather than the core DLL malloc, as there is
  67    no guarantee they will use the same heap
  68 */
  69 extern DL_IMPORT(PyObject *) _PyObject_New Py_PROTO((PyTypeObject *, PyObject *));
  70 extern DL_IMPORT(PyVarObject *) _PyObject_NewVar Py_PROTO((PyTypeObject *, int, PyVarObject *));
  71
  72 #define PyObject_NEW(type, typeobj) ((type *) _PyObject_New(typeobj,(PyObject *)malloc((typeobj)->tp_basicsize)))
  73 #define PyObject_NEW_VAR(type, typeobj, n) ((type *) _PyObject_NewVar(typeobj, n, (PyVarObject *)malloc((typeobj)->tp_basicsize + n * (typeobj)->tp_itemsize)))
  74
  75 #endif /* MS_COREDLL */
  76
  77 #ifdef __cplusplus
  78 }
  79 #endif
  80 #endif /* !Py_OBJIMPL_H */