1/* GNU Objective C Runtime Miscellaneous
2   Copyright (C) 1993, 1994, 1995, 1996, 1997, 2002
3   Free Software Foundation, Inc.
4   Contributed by Kresten Krab Thorup
5
6This file is part of GCC.
7
8GCC is free software; you can redistribute it and/or modify it
9under the terms of the GNU General Public License as published by the
10Free Software Foundation; either version 2, or (at your option) any
11later version.
12
13GCC is distributed in the hope that it will be useful, but WITHOUT
14ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License
19along with GCC; see the file COPYING.  If not, write to the Free
20Software Foundation, 51 Franklin Street, Fifth Floor,
21Boston, MA 02110-1301, USA.  */
22
23/* As a special exception, if you link this library with files compiled with
24   GCC to produce an executable, this does not cause the resulting executable
25   to be covered by the GNU General Public License. This exception does not
26   however invalidate any other reasons why the executable file might be
27   covered by the GNU General Public License.  */
28
29#define __USE_FIXED_PROTOTYPES__
30#include <stdlib.h>
31#include "objc/runtime.h"
32
33/*
34** Error handler function
35** NULL so that default is to just print to stderr
36*/
37static objc_error_handler _objc_error_handler = NULL;
38
39/* Trigger an objc error */
40void
41objc_error (id object, int code, const char *fmt, ...)
42{
43  va_list ap;
44
45  va_start (ap, fmt);
46  objc_verror (object, code, fmt, ap);
47  va_end (ap);
48}
49
50/* Trigger an objc error */
51void
52objc_verror (id object, int code, const char *fmt, va_list ap)
53{
54  BOOL result = NO;
55
56  /* Call the error handler if its there
57     Otherwise print to stderr */
58  if (_objc_error_handler)
59    result = (*_objc_error_handler) (object, code, fmt, ap);
60  else
61    vfprintf (stderr, fmt, ap);
62
63  /* Continue if the error handler says its ok
64     Otherwise abort the program */
65  if (result)
66    return;
67  else
68    abort ();
69}
70
71/* Set the error handler */
72objc_error_handler
73objc_set_error_handler (objc_error_handler func)
74{
75  objc_error_handler temp = _objc_error_handler;
76  _objc_error_handler = func;
77  return temp;
78}
79
80/*
81** Standard functions for memory allocation and disposal.
82** Users should use these functions in their ObjC programs so
83** that they work properly with garbage collectors as well as
84** can take advantage of the exception/error handling available.
85*/
86
87void *
88objc_malloc (size_t size)
89{
90  void *res = (void *) (*_objc_malloc) (size);
91  if (! res)
92    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
93  return res;
94}
95
96void *
97objc_atomic_malloc (size_t size)
98{
99  void *res = (void *) (*_objc_atomic_malloc) (size);
100  if (! res)
101    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
102  return res;
103}
104
105void *
106objc_valloc (size_t size)
107{
108  void *res = (void *) (*_objc_valloc) (size);
109  if (! res)
110    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
111  return res;
112}
113
114void *
115objc_realloc (void *mem, size_t size)
116{
117  void *res = (void *) (*_objc_realloc) (mem, size);
118  if (! res)
119    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
120  return res;
121}
122
123void *
124objc_calloc (size_t nelem, size_t size)
125{
126  void *res = (void *) (*_objc_calloc) (nelem, size);
127  if (! res)
128    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
129  return res;
130}
131
132void
133objc_free (void *mem)
134{
135  (*_objc_free) (mem);
136}
137
138/*
139** Hook functions for memory allocation and disposal.
140** This makes it easy to substitute garbage collection systems
141** such as Boehm's GC by assigning these function pointers
142** to the GC's allocation routines.  By default these point
143** to the ANSI standard malloc, realloc, free, etc.
144**
145** Users should call the normal objc routines above for
146** memory allocation and disposal within their programs.
147*/
148
149#if OBJC_WITH_GC
150#include <gc.h>
151
152static void *
153GC_calloc (size_t nelem, size_t size)
154{
155  void *p = GC_malloc (nelem * size);
156  if (! p)
157    objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted!\n");
158
159  memset (p, 0, nelem * size);
160  return p;
161}
162
163static void
164noFree (void *p)
165{
166}
167
168void *(*_objc_malloc) (size_t) = GC_malloc;
169void *(*_objc_atomic_malloc) (size_t) = GC_malloc_atomic;
170void *(*_objc_valloc) (size_t) = GC_malloc;
171void *(*_objc_realloc) (void *, size_t) = GC_realloc;
172void *(*_objc_calloc) (size_t, size_t) = GC_calloc;
173void (*_objc_free) (void *) = noFree;
174
175#else	/* !OBJC_WITH_GC */
176
177void *(*_objc_malloc) (size_t) = malloc;
178void *(*_objc_atomic_malloc) (size_t) = malloc;
179void *(*_objc_valloc) (size_t) = malloc;
180void *(*_objc_realloc) (void *, size_t) = realloc;
181void *(*_objc_calloc) (size_t, size_t) = calloc;
182void (*_objc_free) (void *) = free;
183
184
185#endif	/* !OBJC_WITH_GC */
186