MagickCore 7.1.1
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memory-private.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 private memory methods.
17*/
18#ifndef MAGICKCORE_MEMORY_PRIVATE_H
19#define MAGICKCORE_MEMORY_PRIVATE_H
20
21#include "MagickCore/magick-config.h"
22
23#if defined(__cplusplus) || defined(c_plusplus)
24extern "C" {
25#endif
26
27#if defined(__powerpc__)
28# define CACHE_LINE_SIZE (16 * MAGICKCORE_SIZEOF_VOID_P)
29#else
30# define CACHE_LINE_SIZE (8 * MAGICKCORE_SIZEOF_VOID_P)
31#endif
32
33#define CACHE_ALIGNED(n) MAGICKCORE_ALIGN_UP(n,CACHE_LINE_SIZE)
34
35#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 6))
36#if !defined(__ICC)
37#define MagickAssumeAligned(address) \
38 __builtin_assume_aligned((address),CACHE_LINE_SIZE)
39#else
40#define MagickAssumeAligned(address) (address)
41#endif
42#else
43#define MagickAssumeAligned(address) (address)
44#endif
45
46static inline size_t OverAllocateMemory(const size_t length)
47{
48 size_t
49 extent;
50
51 /*
52 Over allocate memory, typically used when concatenating strings.
53 */
54 extent=length;
55 if (extent < 131072)
56 for (extent=256; extent < length; extent*=2);
57 return(extent);
58}
59
60extern MagickPrivate MagickBooleanType
61 ShredMagickMemory(void *,const size_t);
62
63extern MagickPrivate void
64 ResetMaxMemoryRequest(void),
65 ResetVirtualAnonymousMemory(void),
66 SetMaxMemoryRequest(const MagickSizeType);
67
68#if defined(__cplusplus) || defined(c_plusplus)
69}
70#endif
71
72#endif