Mercurial > hg > CbC > CbC_gcc
comparison libgfortran/runtime/memory.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 /* Memory management routines. | |
2 Copyright (C) 2002-2017 Free Software Foundation, Inc. | |
3 Contributed by Paul Brook <paul@nowt.org> | |
4 | |
5 This file is part of the GNU Fortran runtime library (libgfortran). | |
6 | |
7 Libgfortran is free software; you can redistribute it and/or | |
8 modify it under the terms of the GNU General Public | |
9 License as published by the Free Software Foundation; either | |
10 version 3 of the License, or (at your option) any later version. | |
11 | |
12 Libgfortran is distributed in the hope that it will be useful, | |
13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 GNU General Public License for more details. | |
16 | |
17 Under Section 7 of GPL version 3, you are granted additional | |
18 permissions described in the GCC Runtime Library Exception, version | |
19 3.1, as published by the Free Software Foundation. | |
20 | |
21 You should have received a copy of the GNU General Public License and | |
22 a copy of the GCC Runtime Library Exception along with this program; | |
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 <http://www.gnu.org/licenses/>. */ | |
25 | |
26 #include "libgfortran.h" | |
27 #include <errno.h> | |
28 | |
29 #ifndef SIZE_MAX | |
30 #define SIZE_MAX ((size_t)-1) | |
31 #endif | |
32 | |
33 | |
34 void * | |
35 xmalloc (size_t n) | |
36 { | |
37 void *p; | |
38 | |
39 if (n == 0) | |
40 n = 1; | |
41 | |
42 p = malloc (n); | |
43 | |
44 if (p == NULL) | |
45 os_error ("Memory allocation failed"); | |
46 | |
47 return p; | |
48 } | |
49 | |
50 | |
51 void * | |
52 xmallocarray (size_t nmemb, size_t size) | |
53 { | |
54 void *p; | |
55 | |
56 if (!nmemb || !size) | |
57 size = nmemb = 1; | |
58 #define HALF_SIZE_T (((size_t) 1) << (__CHAR_BIT__ * sizeof (size_t) / 2)) | |
59 else if (__builtin_expect ((nmemb | size) >= HALF_SIZE_T, 0) | |
60 && nmemb > SIZE_MAX / size) | |
61 { | |
62 errno = ENOMEM; | |
63 os_error ("Integer overflow in xmallocarray"); | |
64 } | |
65 | |
66 p = malloc (nmemb * size); | |
67 | |
68 if (!p) | |
69 os_error ("Memory allocation failed in xmallocarray"); | |
70 | |
71 return p; | |
72 } | |
73 | |
74 | |
75 /* calloc wrapper that aborts on error. */ | |
76 | |
77 void * | |
78 xcalloc (size_t nmemb, size_t size) | |
79 { | |
80 if (!nmemb || !size) | |
81 nmemb = size = 1; | |
82 | |
83 void *p = calloc (nmemb, size); | |
84 if (!p) | |
85 os_error ("Allocating cleared memory failed"); | |
86 | |
87 return p; | |
88 } | |
89 | |
90 | |
91 void * | |
92 xrealloc (void *ptr, size_t size) | |
93 { | |
94 if (size == 0) | |
95 size = 1; | |
96 | |
97 void *newp = realloc (ptr, size); | |
98 if (!newp) | |
99 os_error ("Memory allocation failure in xrealloc"); | |
100 | |
101 return newp; | |
102 } |