1/*M///////////////////////////////////////////////////////////////////////////////////////
2//
3//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
4//
5//  By downloading, copying, installing or using the software you agree to this license.
6//  If you do not agree to this license, do not download, install,
7//  copy or use the software.
8//
9//
10//                        Intel License Agreement
11//                For Open Source Computer Vision Library
12//
13// Copyright (C) 2000, Intel Corporation, all rights reserved.
14// Third party copyrights are property of their respective owners.
15//
16// Redistribution and use in source and binary forms, with or without modification,
17// are permitted provided that the following conditions are met:
18//
19//   * Redistribution's of source code must retain the above copyright notice,
20//     this list of conditions and the following disclaimer.
21//
22//   * Redistribution's in binary form must reproduce the above copyright notice,
23//     this list of conditions and the following disclaimer in the documentation
24//     and/or other materials provided with the distribution.
25//
26//   * The name of Intel Corporation may not be used to endorse or promote products
27//     derived from this software without specific prior written permission.
28//
29// This software is provided by the copyright holders and contributors "as is" and
30// any express or implied warranties, including, but not limited to, the implied
31// warranties of merchantability and fitness for a particular purpose are disclaimed.
32// In no event shall the Intel Corporation or contributors be liable for any direct,
33// indirect, incidental, special, exemplary, or consequential damages
34// (including, but not limited to, procurement of substitute goods or services;
35// loss of use, data, or profits; or business interruption) however caused
36// and on any theory of liability, whether in contract, strict liability,
37// or tort (including negligence or otherwise) arising in any way out of
38// the use of this software, even if advised of the possibility of such damage.
39//
40//M*/
41
42#include "_cxcore.h"
43
44// default <malloc>
45static void*
46icvDefaultAlloc( size_t size, void* )
47{
48    char *ptr, *ptr0 = (char*)malloc(
49        (size_t)(size + CV_MALLOC_ALIGN*((size >= 4096) + 1) + sizeof(char*)));
50
51    if( !ptr0 )
52        return 0;
53
54    // align the pointer
55    ptr = (char*)cvAlignPtr(ptr0 + sizeof(char*) + 1, CV_MALLOC_ALIGN);
56    *(char**)(ptr - sizeof(char*)) = ptr0;
57
58    return ptr;
59}
60
61
62// default <free>
63static int
64icvDefaultFree( void* ptr, void* )
65{
66    // Pointer must be aligned by CV_MALLOC_ALIGN
67    if( ((size_t)ptr & (CV_MALLOC_ALIGN-1)) != 0 )
68        return CV_BADARG_ERR;
69    free( *((char**)ptr - 1) );
70
71    return CV_OK;
72}
73
74
75// pointers to allocation functions, initially set to default
76static CvAllocFunc p_cvAlloc = icvDefaultAlloc;
77static CvFreeFunc p_cvFree = icvDefaultFree;
78static void* p_cvAllocUserData = 0;
79
80CV_IMPL void cvSetMemoryManager( CvAllocFunc alloc_func, CvFreeFunc free_func, void* userdata )
81{
82    CV_FUNCNAME( "cvSetMemoryManager" );
83
84    __BEGIN__;
85
86    if( (alloc_func == 0) ^ (free_func == 0) )
87        CV_ERROR( CV_StsNullPtr, "Either both pointers should be NULL or none of them");
88
89    p_cvAlloc = alloc_func ? alloc_func : icvDefaultAlloc;
90    p_cvFree = free_func ? free_func : icvDefaultFree;
91    p_cvAllocUserData = userdata;
92
93    __END__;
94}
95
96
97CV_IMPL  void*  cvAlloc( size_t size )
98{
99    void* ptr = 0;
100
101    CV_FUNCNAME( "cvAlloc" );
102
103    __BEGIN__;
104
105    if( (size_t)size > CV_MAX_ALLOC_SIZE )
106        CV_ERROR( CV_StsOutOfRange,
107                  "Negative or too large argument of cvAlloc function" );
108
109    ptr = p_cvAlloc( size, p_cvAllocUserData );
110    if( !ptr )
111        CV_ERROR( CV_StsNoMem, "Out of memory" );
112
113    __END__;
114
115    return ptr;
116}
117
118
119CV_IMPL  void  cvFree_( void* ptr )
120{
121    CV_FUNCNAME( "cvFree_" );
122
123    __BEGIN__;
124
125    if( ptr )
126    {
127        CVStatus status = p_cvFree( ptr, p_cvAllocUserData );
128        if( status < 0 )
129            CV_ERROR( status, "Deallocation error" );
130    }
131
132    __END__;
133}
134
135/* End of file. */
136