1 /*
2 Copyright 1999-2021 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 #include <assert.h>
23
24 #if defined(__cplusplus) || defined(c_plusplus)
25 extern "C" {
26 #endif
27
28 typedef struct _MemoryInfo
29 MemoryInfo;
30
31 typedef void
32 *(*AcquireMemoryHandler)(size_t) magick_alloc_size(1),
33 (*DestroyMemoryHandler)(void *),
34 *(*ResizeMemoryHandler)(void *,size_t) magick_alloc_size(2),
35 *(*AcquireAlignedMemoryHandler)(const size_t,const size_t),
36 (*RelinquishAlignedMemoryHandler)(void *);
37
38 extern MagickExport MemoryInfo
39 *AcquireVirtualMemory(const size_t,const size_t) magick_alloc_sizes(1,2),
40 *RelinquishVirtualMemory(MemoryInfo *);
41
42 extern MagickExport size_t
43 GetMaxMemoryRequest(void);
44
45 extern MagickExport void
46 *AcquireAlignedMemory(const size_t,const size_t)
47 magick_attribute((__malloc__)) magick_alloc_sizes(1,2),
48 *AcquireMagickMemory(const size_t) magick_attribute((__malloc__))
49 magick_alloc_size(1),
50 *AcquireCriticalMemory(const size_t),
51 *AcquireQuantumMemory(const size_t,const size_t)
52 magick_attribute((__malloc__)) magick_alloc_sizes(1,2),
53 *CopyMagickMemory(void *magick_restrict,const void *magick_restrict,
54 const size_t) magick_attribute((__nonnull__)),
55 DestroyMagickMemory(void),
56 GetMagickMemoryMethods(AcquireMemoryHandler *,ResizeMemoryHandler *,
57 DestroyMemoryHandler *),
58 *GetVirtualMemoryBlob(const MemoryInfo *),
59 *RelinquishAlignedMemory(void *),
60 *RelinquishMagickMemory(void *),
61 *ResetMagickMemory(void *,int,const size_t),
62 *ResizeMagickMemory(void *,const size_t)
63 magick_attribute((__malloc__)) magick_alloc_size(2),
64 *ResizeQuantumMemory(void *,const size_t,const size_t)
65 magick_attribute((__malloc__)) magick_alloc_sizes(2,3),
66 SetMagickAlignedMemoryMethods(AcquireAlignedMemoryHandler,
67 RelinquishAlignedMemoryHandler),
68 SetMagickMemoryMethods(AcquireMemoryHandler,ResizeMemoryHandler,
69 DestroyMemoryHandler);
70
HeapOverflowSanityCheck(const size_t count,const size_t quantum)71 static inline MagickBooleanType HeapOverflowSanityCheck(
72 const size_t count,const size_t quantum)
73 {
74 if ((count == 0) || (quantum == 0))
75 return(MagickTrue);
76 if (quantum != ((count*quantum)/count))
77 {
78 errno=ENOMEM;
79 return(MagickTrue);
80 }
81 return(MagickFalse);
82 }
83
HeapOverflowSanityCheckGetSize(const size_t count,const size_t quantum,size_t * const extent)84 static inline MagickBooleanType HeapOverflowSanityCheckGetSize(
85 const size_t count,const size_t quantum,size_t *const extent)
86 {
87 size_t
88 length;
89
90 if ((count == 0) || (quantum == 0))
91 return(MagickTrue);
92 length=count*quantum;
93 if (quantum != (length/count))
94 {
95 errno=ENOMEM;
96 return(MagickTrue);
97 }
98 assert(extent != NULL);
99 *extent=length;
100 return(MagickFalse);
101 }
102
103 #if defined(__cplusplus) || defined(c_plusplus)
104 }
105 #endif
106
107 #endif
108