libobjc/memory.c

   1 /* GNU Objective C Runtime Memory allocation functions
   2    Copyright (C) 1993-2017 Free Software Foundation, Inc.
   3    Contributed by Kresten Krab Thorup
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it
   8 under the terms of the GNU General Public License as published by the
   9 Free Software Foundation; either version 3, or (at your option) any
  10 later version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT
  13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 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 /* This file includes the standard functions for memory allocation and
  27    disposal.  Users should use these functions in their ObjC programs
  28    so that they work properly with garbage collectors.  */
  29
  30 /* TODO: Turn these into macros or inline functions.  */
  31
  32 #include "objc-private/common.h"
  33 #include "objc-private/error.h"
  34
  35 /* __USE_FIXED_PROTOTYPES__ used to be required to get prototypes for
  36    malloc, free, etc. on some platforms.  It is unclear if we still
  37    need it, but it can't hurt.  */
  38 #define __USE_FIXED_PROTOTYPES__
  39 #include <stdlib.h>
  40
  41 #include "objc/runtime.h"
  42
  43 #if OBJC_WITH_GC
  44 #include <gc/gc.h>
  45
  46 void *
  47 objc_malloc (size_t size)
  48 {
  49   void *res = (void *)(GC_malloc (size));
  50   if (! res)
  51     _objc_abort ("Virtual memory exhausted\n");
  52   return res;
  53 }
  54
  55 void *
  56 objc_atomic_malloc (size_t size)
  57 {
  58   void *res = (void *)(GC_malloc_atomic (size));
  59   if (! res)
  60     _objc_abort ("Virtual memory exhausted\n");
  61   return res;
  62 }
  63
  64 void *
  65 objc_realloc (void *mem, size_t size)
  66 {
  67   void *res = (void *)(GC_realloc (mem, size));
  68   if (! res)
  69     _objc_abort ("Virtual memory exhausted\n");
  70   return res;
  71 }
  72
  73 void *
  74 objc_calloc (size_t nelem, size_t size)
  75 {
  76   /* Note that GC_malloc returns cleared memory (see documentation) so
  77      there is no need to clear it.  */
  78   void *res = (void *)(GC_malloc (nelem * size));
  79   if (! res)
  80     _objc_abort ("Virtual memory exhausted\n");
  81   return res;
  82 }
  83
  84 void
  85 objc_free (void *mem __attribute__ ((__unused__)))
  86 {
  87   return;
  88 }
  89
  90 #else
  91
  92 void *
  93 objc_malloc (size_t size)
  94 {
  95   void *res = (void *)(malloc (size));
  96   if (! res)
  97     _objc_abort ("Virtual memory exhausted\n");
  98   return res;
  99 }
 100
 101 void *
 102 objc_atomic_malloc (size_t size)
 103 {
 104   void *res = (void *)(malloc (size));
 105   if (! res)
 106     _objc_abort ("Virtual memory exhausted\n");
 107   return res;
 108 }
 109
 110 void *
 111 objc_realloc (void *mem, size_t size)
 112 {
 113   void *res = (void *)(realloc (mem, size));
 114   if (! res)
 115     _objc_abort ("Virtual memory exhausted\n");
 116   return res;
 117 }
 118
 119 void *
 120 objc_calloc (size_t nelem, size_t size)
 121 {
 122   void *res = (void *)(calloc (nelem, size));
 123   if (! res)
 124     _objc_abort ("Virtual memory exhausted\n");
 125   return res;
 126 }
 127
 128 void
 129 objc_free (void *mem)
 130 {
 131   free (mem);
 132 }
 133
 134 #endif  /* !OBJC_WITH_GC */