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 /* This file includes the standard functions for memory allocation and
  28    disposal.  Users should use these functions in their ObjC programs
  29    so that they work properly with garbage collectors.  */
  30
  31 /* TODO: Turn these into macros or inline functions.  */
  32
  33 #include "objc-private/common.h"
  34 #include "objc-private/error.h"
  35
  36 /* __USE_FIXED_PROTOTYPES__ used to be required to get prototypes for
  37    malloc, free, etc. on some platforms.  It is unclear if we still
  38    need it, but it can't hurt.  */
  39 #define __USE_FIXED_PROTOTYPES__
  40 #include <stdlib.h>
  41
  42 #include "objc/runtime.h"
  43
  44 #if OBJC_WITH_GC
  45 #include <gc.h>
  46
  47 void *
  48 objc_malloc (size_t size)
  49 {
  50   void *res = (void *)(GC_malloc (size));
  51   if (! res)
  52     _objc_abort ("Virtual memory exhausted\n");
  53   return res;
  54 }
  55
  56 void *
  57 objc_atomic_malloc (size_t size)
  58 {
  59   void *res = (void *)(GC_malloc_atomic (size));
  60   if (! res)
  61     _objc_abort ("Virtual memory exhausted\n");
  62   return res;
  63 }
  64
  65 void *
  66 objc_realloc (void *mem, size_t size)
  67 {
  68   void *res = (void *)(GC_realloc (mem, size));
  69   if (! res)
  70     _objc_abort ("Virtual memory exhausted\n");
  71   return res;
  72 }
  73
  74 void *
  75 objc_calloc (size_t nelem, size_t size)
  76 {
  77   /* Note that GC_malloc returns cleared memory (see documentation) so
  78      there is no need to clear it.  */
  79   void *res = (void *)(GC_malloc (nelem * size));
  80   if (! res)
  81     _objc_abort ("Virtual memory exhausted\n");
  82   return res;
  83 }
  84
  85 void
  86 objc_free (void *mem __attribute__ ((__unused__)))
  87 {
  88   return;
  89 }
  90
  91 #else
  92
  93 void *
  94 objc_malloc (size_t size)
  95 {
  96   void *res = (void *)(malloc (size));
  97   if (! res)
  98     _objc_abort ("Virtual memory exhausted\n");
  99   return res;
 100 }
 101
 102 void *
 103 objc_atomic_malloc (size_t size)
 104 {
 105   void *res = (void *)(malloc (size));
 106   if (! res)
 107     _objc_abort ("Virtual memory exhausted\n");
 108   return res;
 109 }
 110
 111 void *
 112 objc_realloc (void *mem, size_t size)
 113 {
 114   void *res = (void *)(realloc (mem, size));
 115   if (! res)
 116     _objc_abort ("Virtual memory exhausted\n");
 117   return res;
 118 }
 119
 120 void *
 121 objc_calloc (size_t nelem, size_t size)
 122 {
 123   void *res = (void *)(calloc (nelem, size));
 124   if (! res)
 125     _objc_abort ("Virtual memory exhausted\n");
 126   return res;
 127 }
 128
 129 void
 130 objc_free (void *mem)
 131 {
 132   free (mem);
 133 }
 134
 135 #endif  /* !OBJC_WITH_GC */
 136
 137 /* The rest of the file contains deprecated code.  */
 138
 139 #if OBJC_WITH_GC
 140
 141 void *
 142 objc_valloc (size_t size)
 143 {
 144   void *res = (void *)(GC_malloc (size));
 145   if (! res)
 146     _objc_abort ("Virtual memory exhausted\n");
 147   return res;
 148 }
 149
 150 #else
 151
 152 void *
 153 objc_valloc (size_t size)
 154 {
 155   void *res = (void *)(malloc (size));
 156   if (! res)
 157     _objc_abort ("Virtual memory exhausted\n");
 158   return res;
 159 }
 160
 161 #endif  /* !OBJC_WITH_GC */
 162
 163 /* Hook functions for memory allocation and disposal.  Deprecated and
 164    currently unused.  */
 165 void *(*_objc_malloc) (size_t) = malloc;
 166 void *(*_objc_atomic_malloc) (size_t) = malloc;
 167 void *(*_objc_valloc) (size_t) = malloc;
 168 void *(*_objc_realloc) (void *, size_t) = realloc;
 169 void *(*_objc_calloc) (size_t, size_t) = calloc;
 170 void (*_objc_free) (void *) = free;