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annotate Include/mymalloc.h @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 201c8d06e3b7
children e2cce4adf2a7
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1 #ifndef Py_MYMALLOC_H
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2 #define Py_MYMALLOC_H
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3 /***********************************************************
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4 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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5 The Netherlands.
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6
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7 All Rights Reserved
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8
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9 Permission to use, copy, modify, and distribute this software and its
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10 documentation for any purpose and without fee is hereby granted,
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11 provided that the above copyright notice appear in all copies and that
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12 both that copyright notice and this permission notice appear in
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13 supporting documentation, and that the names of Stichting Mathematisch
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14 Centrum or CWI or Corporation for National Research Initiatives or
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15 CNRI not be used in advertising or publicity pertaining to
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16 distribution of the software without specific, written prior
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17 permission.
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18
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19 While CWI is the initial source for this software, a modified version
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20 is made available by the Corporation for National Research Initiatives
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21 (CNRI) at the Internet address ftp://ftp.python.org.
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22
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23 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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24 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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25 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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26 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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27 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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28 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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29 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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30 PERFORMANCE OF THIS SOFTWARE.
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31
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32 ******************************************************************/
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33
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34 /* Lowest-level memory allocation interface */
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35
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36 #ifdef macintosh
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37 #define ANY void
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38 #endif
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39
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40 #ifdef __STDC__
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41 #define ANY void
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42 #endif
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43
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44 #ifdef __TURBOC__
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45 #define ANY void
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46 #endif
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47
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48 #ifdef __GNUC__
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49 #define ANY void
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50 #endif
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51
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52 #ifndef ANY
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53 #define ANY char
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54 #endif
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55
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56 #ifdef HAVE_STDLIB_H
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57 #include <stdlib.h>
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58 #endif
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59
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60 #ifdef __cplusplus
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61 // Move this down here since some C++ #include's don't like to be included
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62 // inside an extern "C"
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63 extern "C" {
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64 #endif
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65
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66 #ifdef SYMANTEC__CFM68K__
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67 #pragma lib_export on
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68 #endif
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69
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70 #ifndef HAVE_STDLIB_H
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71 extern ANY *malloc Py_PROTO((size_t));
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72 extern ANY *calloc Py_PROTO((size_t, size_t));
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73 extern ANY *realloc Py_PROTO((ANY *, size_t));
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74 extern void free Py_PROTO((ANY *)); /* XXX sometimes int on Unix old systems */
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75 #endif /* !HAVE_STDLIB */
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76
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77 #ifndef NULL
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78 #define NULL ((ANY *)0)
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79 #endif
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80
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81 #ifdef MALLOC_ZERO_RETURNS_NULL
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82 /* XXX Always allocate one extra byte, since some malloc's return NULL
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83 XXX for malloc(0) or realloc(p, 0). */
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84 #define _PyMem_EXTRA 1
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85 #else
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86 #define _PyMem_EXTRA 0
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87 #endif
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88
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89 #define PyMem_NEW(type, n) \
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90 ( (type *) malloc(_PyMem_EXTRA + (n) * sizeof(type)) )
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91 #define PyMem_RESIZE(p, type, n) \
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92 if ((p) == NULL) \
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93 (p) = (type *) malloc(_PyMem_EXTRA + (n) * sizeof(type)); \
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94 else \
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95 (p) = (type *) realloc((ANY *)(p), \
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96 _PyMem_EXTRA + (n) * sizeof(type))
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97 #define PyMem_DEL(p) free((ANY *)p)
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98 #define PyMem_XDEL(p) if ((p) == NULL) ; else PyMem_DEL(p)
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99
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100 #ifdef __cplusplus
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101 }
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102 #endif
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103
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104 #endif /* !Py_MYMALLOC_H */