* configure.ac (target_header_dir): vfork is a stub under djgpp.
[official-gcc.git] / libobjc / misc.c
blob3ae8a55cfe6659f126f88e3973de5f7dc0ffc388
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
6 This file is part of GCC.
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 2, or (at your option) any
11 later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
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. */
29 #define __USE_FIXED_PROTOTYPES__
30 #include <stdlib.h>
31 #include "runtime.h"
34 ** Error handler function
35 ** NULL so that default is to just print to stderr
37 static objc_error_handler _objc_error_handler = NULL;
39 /* Trigger an objc error */
40 void
41 objc_error (id object, int code, const char *fmt, ...)
43 va_list ap;
45 va_start (ap, fmt);
46 objc_verror (object, code, fmt, ap);
47 va_end (ap);
50 /* Trigger an objc error */
51 void
52 objc_verror (id object, int code, const char *fmt, va_list ap)
54 BOOL result = NO;
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);
63 /* Continue if the error handler says its ok
64 Otherwise abort the program */
65 if (result)
66 return;
67 else
68 abort ();
71 /* Set the error handler */
72 objc_error_handler
73 objc_set_error_handler (objc_error_handler func)
75 objc_error_handler temp = _objc_error_handler;
76 _objc_error_handler = func;
77 return temp;
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.
87 void *
88 objc_malloc (size_t size)
90 void *res = (void *) (*_objc_malloc) (size);
91 if (! res)
92 objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
93 return res;
96 void *
97 objc_atomic_malloc (size_t size)
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;
105 void *
106 objc_valloc (size_t size)
108 void *res = (void *) (*_objc_valloc) (size);
109 if (! res)
110 objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted\n");
111 return res;
114 void *
115 objc_realloc (void *mem, size_t size)
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;
123 void *
124 objc_calloc (size_t nelem, size_t size)
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;
132 void
133 objc_free (void *mem)
135 (*_objc_free) (mem);
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.
145 ** Users should call the normal objc routines above for
146 ** memory allocation and disposal within their programs.
149 #if OBJC_WITH_GC
150 #include <gc.h>
152 static void *
153 GC_calloc (size_t nelem, size_t size)
155 void *p = GC_malloc (nelem * size);
156 if (! p)
157 objc_error (nil, OBJC_ERR_MEMORY, "Virtual memory exhausted!\n");
159 memset (p, 0, nelem * size);
160 return p;
163 static void
164 noFree (void *p)
168 void *(*_objc_malloc) (size_t) = GC_malloc;
169 void *(*_objc_atomic_malloc) (size_t) = GC_malloc_atomic;
170 void *(*_objc_valloc) (size_t) = GC_malloc;
171 void *(*_objc_realloc) (void *, size_t) = GC_realloc;
172 void *(*_objc_calloc) (size_t, size_t) = GC_calloc;
173 void (*_objc_free) (void *) = noFree;
175 #else /* !OBJC_WITH_GC */
177 void *(*_objc_malloc) (size_t) = malloc;
178 void *(*_objc_atomic_malloc) (size_t) = malloc;
179 void *(*_objc_valloc) (size_t) = malloc;
180 void *(*_objc_realloc) (void *, size_t) = realloc;
181 void *(*_objc_calloc) (size_t, size_t) = calloc;
182 void (*_objc_free) (void *) = free;
185 #endif /* !OBJC_WITH_GC */