libobjc/memory.c

   1 /* GNU Objective C Runtime Memory allocation functions
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 2002, 2009, 2010
   3    Free Software Foundation, Inc.
   4    Contributed by Kresten Krab Thorup
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it
   9 under the terms of the GNU General Public License as published by the
  10 Free Software Foundation; either version 3, or (at your option) any
  11 later version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT
  14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 /*
  28   This file includes the standard functions for memory allocation and
  29   disposal.  Users should use these functions in their ObjC programs
  30   so that they work properly with garbage collectors.
  31 */
  32
  33 /* TODO: Turn these into macros or inline functions.  */
  34
  35 #include "objc-private/common.h"
  36 #include "objc-private/error.h"
  37
  38 /* __USE_FIXED_PROTOTYPES__ used to be required to get prototypes for
  39    malloc, free, etc. on some platforms.  It is unclear if we still
  40    need it, but it can't hurt.
  41 */
  42 #define __USE_FIXED_PROTOTYPES__
  43 #include <stdlib.h>
  44
  45 #include "objc/objc.h"
  46 #include "objc/objc-api.h"
  47
  48 #if OBJC_WITH_GC
  49 #include <gc.h>
  50
  51 void *
  52 objc_malloc (size_t size)
  53 {
  54   void *res = (void *)(GC_malloc (size));
  55   if (! res)
  56     _objc_abort ("Virtual memory exhausted\n");
  57   return res;
  58 }
  59
  60 void *
  61 objc_atomic_malloc (size_t size)
  62 {
  63   void *res = (void *)(GC_malloc_atomic (size));
  64   if (! res)
  65     _objc_abort ("Virtual memory exhausted\n");
  66   return res;
  67 }
  68
  69 void *
  70 objc_realloc (void *mem, size_t size)
  71 {
  72   void *res = (void *)(GC_realloc (mem, size));
  73   if (! res)
  74     _objc_abort ("Virtual memory exhausted\n");
  75   return res;
  76 }
  77
  78 void *
  79 objc_calloc (size_t nelem, size_t size)
  80 {
  81   /* Note that GC_malloc returns cleared memory (see documentation) so
  82      there is no need to clear it.  */
  83   void *res = (void *)(GC_malloc (nelem * size));
  84   if (! res)
  85     _objc_abort ("Virtual memory exhausted\n");
  86   return res;
  87 }
  88
  89 void
  90 objc_free (void *mem __attribute__ ((__unused__)))
  91 {
  92   return;
  93 }
  94
  95 #else
  96
  97 void *
  98 objc_malloc (size_t size)
  99 {
 100   void *res = (void *)(malloc (size));
 101   if (! res)
 102     _objc_abort ("Virtual memory exhausted\n");
 103   return res;
 104 }
 105
 106 void *
 107 objc_atomic_malloc (size_t size)
 108 {
 109   void *res = (void *)(malloc (size));
 110   if (! res)
 111     _objc_abort ("Virtual memory exhausted\n");
 112   return res;
 113 }
 114
 115 void *
 116 objc_realloc (void *mem, size_t size)
 117 {
 118   void *res = (void *)(realloc (mem, size));
 119   if (! res)
 120     _objc_abort ("Virtual memory exhausted\n");
 121   return res;
 122 }
 123
 124 void *
 125 objc_calloc (size_t nelem, size_t size)
 126 {
 127   void *res = (void *)(calloc (nelem, size));
 128   if (! res)
 129     _objc_abort ("Virtual memory exhausted\n");
 130   return res;
 131 }
 132
 133 void
 134 objc_free (void *mem)
 135 {
 136   free (mem);
 137 }
 138
 139 #endif  /* !OBJC_WITH_GC */
 140
 141 /* The rest of the file contains deprecated code.  */
 142
 143 #if OBJC_WITH_GC
 144
 145 void *
 146 objc_valloc (size_t size)
 147 {
 148   void *res = (void *)(GC_malloc (size));
 149   if (! res)
 150     _objc_abort ("Virtual memory exhausted\n");
 151   return res;
 152 }
 153
 154 #else
 155
 156 void *
 157 objc_valloc (size_t size)
 158 {
 159   void *res = (void *)(malloc (size));
 160   if (! res)
 161     _objc_abort ("Virtual memory exhausted\n");
 162   return res;
 163 }
 164
 165 #endif  /* !OBJC_WITH_GC */
 166
 167 /*
 168   Hook functions for memory allocation and disposal.  Deprecated
 169   and currently unused.
 170 */
 171
 172 void *(*_objc_malloc) (size_t) = malloc;
 173 void *(*_objc_atomic_malloc) (size_t) = malloc;
 174 void *(*_objc_valloc) (size_t) = malloc;
 175 void *(*_objc_realloc) (void *, size_t) = realloc;
 176 void *(*_objc_calloc) (size_t, size_t) = calloc;
 177 void (*_objc_free) (void *) = free;