| 160 |
theseven |
1 |
/* alloc.c -- memory allocation
|
|
|
2 |
|
|
|
3 |
This file is part of the UCL data compression library.
|
|
|
4 |
|
|
|
5 |
Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
|
|
|
6 |
All Rights Reserved.
|
|
|
7 |
|
|
|
8 |
The UCL library is free software; you can redistribute it and/or
|
|
|
9 |
modify it under the terms of the GNU General Public License as
|
|
|
10 |
published by the Free Software Foundation; either version 2 of
|
|
|
11 |
the License, or (at your option) any later version.
|
|
|
12 |
|
|
|
13 |
The UCL library is distributed in the hope that it will be useful,
|
|
|
14 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
15 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
16 |
GNU General Public License for more details.
|
|
|
17 |
|
|
|
18 |
You should have received a copy of the GNU General Public License
|
|
|
19 |
along with the UCL library; see the file COPYING.
|
|
|
20 |
If not, write to the Free Software Foundation, Inc.,
|
|
|
21 |
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
22 |
|
|
|
23 |
Markus F.X.J. Oberhumer
|
|
|
24 |
<markus@oberhumer.com>
|
|
|
25 |
http://www.oberhumer.com/opensource/ucl/
|
|
|
26 |
*/
|
|
|
27 |
|
|
|
28 |
|
|
|
29 |
#include "ucl_conf.h"
|
|
|
30 |
|
|
|
31 |
#if defined(HAVE_MALLOC_H)
|
|
|
32 |
# include <malloc.h>
|
|
|
33 |
#endif
|
|
|
34 |
#if defined(__palmos__)
|
|
|
35 |
# include <System/MemoryMgr.h>
|
|
|
36 |
#endif
|
|
|
37 |
|
|
|
38 |
|
|
|
39 |
#undef ucl_alloc_hook
|
|
|
40 |
#undef ucl_free_hook
|
|
|
41 |
#undef ucl_alloc
|
|
|
42 |
#undef ucl_malloc
|
|
|
43 |
#undef ucl_free
|
|
|
44 |
|
|
|
45 |
|
|
|
46 |
/***********************************************************************
|
|
|
47 |
// implementation
|
|
|
48 |
************************************************************************/
|
|
|
49 |
|
|
|
50 |
UCL_PRIVATE(ucl_voidp)
|
|
|
51 |
ucl_alloc_internal(ucl_uint nelems, ucl_uint size)
|
|
|
52 |
{
|
|
|
53 |
ucl_voidp p = NULL;
|
|
|
54 |
unsigned long s = (unsigned long) nelems * size;
|
|
|
55 |
|
|
|
56 |
if (nelems <= 0 || size <= 0 || s < nelems || s < size)
|
|
|
57 |
return NULL;
|
|
|
58 |
|
|
|
59 |
#if defined(__palmos__)
|
|
|
60 |
p = (ucl_voidp) MemPtrNew(s);
|
|
|
61 |
#elif (UCL_UINT_MAX <= SIZE_T_MAX)
|
|
|
62 |
if (s < SIZE_T_MAX)
|
|
|
63 |
p = (ucl_voidp) malloc((size_t)s);
|
|
|
64 |
#elif defined(HAVE_HALLOC) && defined(__DMC__)
|
|
|
65 |
if (size < SIZE_T_MAX)
|
|
|
66 |
p = (ucl_voidp) _halloc(nelems,(size_t)size);
|
|
|
67 |
#elif defined(HAVE_HALLOC)
|
|
|
68 |
if (size < SIZE_T_MAX)
|
|
|
69 |
p = (ucl_voidp) halloc(nelems,(size_t)size);
|
|
|
70 |
#else
|
|
|
71 |
if (s < SIZE_T_MAX)
|
|
|
72 |
p = (ucl_voidp) malloc((size_t)s);
|
|
|
73 |
#endif
|
|
|
74 |
|
|
|
75 |
return p;
|
|
|
76 |
}
|
|
|
77 |
|
|
|
78 |
|
|
|
79 |
UCL_PRIVATE(void)
|
|
|
80 |
ucl_free_internal(ucl_voidp p)
|
|
|
81 |
{
|
|
|
82 |
if (!p)
|
|
|
83 |
return;
|
|
|
84 |
|
|
|
85 |
#if defined(__palmos__)
|
|
|
86 |
MemPtrFree(p);
|
|
|
87 |
#elif (UCL_UINT_MAX <= SIZE_T_MAX)
|
|
|
88 |
free(p);
|
|
|
89 |
#elif defined(HAVE_HALLOC) && defined(__DMC__)
|
|
|
90 |
_hfree(p);
|
|
|
91 |
#elif defined(HAVE_HALLOC)
|
|
|
92 |
hfree(p);
|
|
|
93 |
#else
|
|
|
94 |
free(p);
|
|
|
95 |
#endif
|
|
|
96 |
}
|
|
|
97 |
|
|
|
98 |
|
|
|
99 |
/***********************************************************************
|
|
|
100 |
// public interface using the global hooks
|
|
|
101 |
************************************************************************/
|
|
|
102 |
|
|
|
103 |
/* global allocator hooks */
|
|
|
104 |
ucl_alloc_hook_t ucl_alloc_hook = ucl_alloc_internal;
|
|
|
105 |
ucl_free_hook_t ucl_free_hook = ucl_free_internal;
|
|
|
106 |
|
|
|
107 |
|
|
|
108 |
UCL_PUBLIC(ucl_voidp)
|
|
|
109 |
ucl_alloc(ucl_uint nelems, ucl_uint size)
|
|
|
110 |
{
|
|
|
111 |
if (!ucl_alloc_hook)
|
|
|
112 |
return NULL;
|
|
|
113 |
|
|
|
114 |
return ucl_alloc_hook(nelems,size);
|
|
|
115 |
}
|
|
|
116 |
|
|
|
117 |
|
|
|
118 |
UCL_PUBLIC(ucl_voidp)
|
|
|
119 |
ucl_malloc(ucl_uint size)
|
|
|
120 |
{
|
|
|
121 |
if (!ucl_alloc_hook)
|
|
|
122 |
return NULL;
|
|
|
123 |
|
|
|
124 |
#if defined(__palmos__)
|
|
|
125 |
return ucl_alloc_hook(size,1);
|
|
|
126 |
#elif (UCL_UINT_MAX <= SIZE_T_MAX)
|
|
|
127 |
return ucl_alloc_hook(size,1);
|
|
|
128 |
#elif defined(HAVE_HALLOC)
|
|
|
129 |
/* use segment granularity by default */
|
|
|
130 |
if (size + 15 > size) /* avoid overflow */
|
|
|
131 |
return ucl_alloc_hook((size+15)/16,16);
|
|
|
132 |
return ucl_alloc_hook(size,1);
|
|
|
133 |
#else
|
|
|
134 |
return ucl_alloc_hook(size,1);
|
|
|
135 |
#endif
|
|
|
136 |
}
|
|
|
137 |
|
|
|
138 |
|
|
|
139 |
UCL_PUBLIC(void)
|
|
|
140 |
ucl_free(ucl_voidp p)
|
|
|
141 |
{
|
|
|
142 |
if (!ucl_free_hook)
|
|
|
143 |
return;
|
|
|
144 |
|
|
|
145 |
ucl_free_hook(p);
|
|
|
146 |
}
|
|
|
147 |
|
|
|
148 |
|
|
|
149 |
/*
|
|
|
150 |
vi:ts=4:et
|
|
|
151 |
*/
|