MagickCore 7.1.1
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memory_.h
1/*
2 Copyright @ 1999 ImageMagick Studio LLC, a non-profit organization
3 dedicated to making software imaging solutions freely available.
4
5 You may not use this file except in compliance with the License. You may
6 obtain a copy of the License at
7
8 https://imagemagick.org/script/license.php
9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15
16 MagickCore memory methods.
17*/
18#ifndef MAGICKCORE_MEMORY_H
19#define MAGICKCORE_MEMORY_H
20
21#include <errno.h>
22
23#if defined(__cplusplus) || defined(c_plusplus)
24extern "C" {
25#endif
26
27typedef struct _MemoryInfo
29
30typedef void
31 *(*AcquireMemoryHandler)(size_t) magick_alloc_size(1),
32 (*DestroyMemoryHandler)(void *),
33 *(*ResizeMemoryHandler)(void *,size_t) magick_alloc_size(2),
34 *(*AcquireAlignedMemoryHandler)(const size_t,const size_t),
35 (*RelinquishAlignedMemoryHandler)(void *);
36
37extern MagickExport MemoryInfo
38 *AcquireVirtualMemory(const size_t,const size_t) magick_alloc_sizes(1,2),
39 *RelinquishVirtualMemory(MemoryInfo *);
40
41extern MagickExport size_t
42 GetMaxMemoryRequest(void);
43
44extern MagickExport void
45 *AcquireAlignedMemory(const size_t,const size_t)
46 magick_attribute((__malloc__)) magick_alloc_sizes(1,2),
47 *AcquireMagickMemory(const size_t) magick_attribute((__malloc__))
48 magick_alloc_size(1),
49 *AcquireCriticalMemory(const size_t),
50 *AcquireQuantumMemory(const size_t,const size_t)
51 magick_attribute((__malloc__)) magick_alloc_sizes(1,2),
52 *CopyMagickMemory(void *magick_restrict,const void *magick_restrict,
53 const size_t) magick_attribute((__nonnull__)),
54 DestroyMagickMemory(void),
55 GetMagickMemoryMethods(AcquireMemoryHandler *,ResizeMemoryHandler *,
56 DestroyMemoryHandler *),
57 *GetVirtualMemoryBlob(const MemoryInfo *),
58 *RelinquishAlignedMemory(void *),
59 *RelinquishMagickMemory(void *),
60 *ResetMagickMemory(void *,int,const size_t),
61 *ResizeMagickMemory(void *,const size_t)
62 magick_attribute((__malloc__)) magick_alloc_size(2),
63 *ResizeQuantumMemory(void *,const size_t,const size_t)
64 magick_attribute((__malloc__)) magick_alloc_sizes(2,3),
65 SetMagickAlignedMemoryMethods(AcquireAlignedMemoryHandler,
66 RelinquishAlignedMemoryHandler),
67 SetMagickMemoryMethods(AcquireMemoryHandler,ResizeMemoryHandler,
68 DestroyMemoryHandler);
69
70static inline MagickBooleanType HeapOverflowSanityCheck(
71 const size_t count,const size_t quantum)
72{
73 if ((count == 0) || (quantum == 0))
74 return(MagickTrue);
75 if (quantum != ((count*quantum)/count))
76 {
77 errno=ENOMEM;
78 return(MagickTrue);
79 }
80 return(MagickFalse);
81}
82
83static inline MagickBooleanType HeapOverflowSanityCheckGetSize(
84 const size_t count,const size_t quantum,size_t *const extent)
85{
86 size_t
87 length;
88
89 if ((count == 0) || (quantum == 0))
90 return(MagickTrue);
91 length=count*quantum;
92 if (quantum != (length/count))
93 {
94 errno=ENOMEM;
95 return(MagickTrue);
96 }
97 if (extent != NULL)
98 *extent=length;
99 return(MagickFalse);
100}
101
102#if defined(__cplusplus) || defined(c_plusplus)
103}
104#endif
105
106#endif