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1 /* Copyright (C) 2005-2020 Free Software Foundation, Inc.
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2 Contributed by Richard Henderson <rth@redhat.com>.
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3
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111
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4 This file is part of the GNU Offloading and Multi Processing Library
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5 (libgomp).
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6
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7 Libgomp is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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14 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 /* This file contains wrappers for the system allocation routines. Most
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27 places in the OpenMP API do not make any provision for failure, so in
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28 general we cannot allow memory allocation to fail. */
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29
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30 #define _GNU_SOURCE
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31 #include "libgomp.h"
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32 #include <stdlib.h>
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33
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34
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35 void *
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36 gomp_malloc (size_t size)
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37 {
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38 void *ret = malloc (size);
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39 if (ret == NULL)
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40 gomp_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
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41 return ret;
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42 }
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43
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44 void *
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45 gomp_malloc_cleared (size_t size)
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46 {
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47 void *ret = calloc (1, size);
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48 if (ret == NULL)
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49 gomp_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
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50 return ret;
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51 }
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52
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53 void *
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54 gomp_realloc (void *old, size_t size)
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55 {
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56 void *ret = realloc (old, size);
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57 if (ret == NULL)
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58 gomp_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
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59 return ret;
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60 }
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61
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62 void *
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63 gomp_aligned_alloc (size_t al, size_t size)
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64 {
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65 void *ret;
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66 if (al < sizeof (void *))
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67 al = sizeof (void *);
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68 #ifdef HAVE_ALIGNED_ALLOC
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69 ret = aligned_alloc (al, size);
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70 #elif defined(HAVE__ALIGNED_MALLOC)
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71 ret = _aligned_malloc (size, al);
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72 #elif defined(HAVE_POSIX_MEMALIGN)
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73 if (posix_memalign (&ret, al, size) != 0)
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74 ret = NULL;
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75 #elif defined(HAVE_MEMALIGN)
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76 {
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77 extern void *memalign (size_t, size_t);
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78 ret = memalign (al, size);
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79 }
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80 #else
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81 ret = NULL;
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82 if ((al & (al - 1)) == 0 && size)
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83 {
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84 void *p = malloc (size + al);
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85 if (p)
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86 {
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87 void *ap = (void *) (((uintptr_t) p + al) & -al);
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88 ((void **) ap)[-1] = p;
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89 ret = ap;
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90 }
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91 }
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92 #endif
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93 if (ret == NULL)
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94 gomp_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
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95 return ret;
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96 }
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97
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98 void
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99 gomp_aligned_free (void *ptr)
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100 {
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101 #ifdef GOMP_HAVE_EFFICIENT_ALIGNED_ALLOC
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102 free (ptr);
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103 #else
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104 if (ptr)
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105 free (((void **) ptr)[-1]);
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106 #endif
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107 }
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