MagickCore  7.1.0
memory-private.h
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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 private memory methods.
17 */
18 #ifndef MAGICKCORE_MEMORY_PRIVATE_H
19 #define MAGICKCORE_MEMORY_PRIVATE_H
20 
22 
23 #if defined(__cplusplus) || defined(c_plusplus)
24 extern "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 
46 static inline size_t OverAllocateMemory(const size_t length)
47 {
48  size_t
49  extent;
50 
51  /*
52  Over allocate memory, typically used when concatentating strings.
53  */
54  extent=length;
55  if (extent < 131072)
56  for (extent=256; extent < length; extent*=2);
57  return(extent);
58 }
59 
60 extern MagickPrivate void
63 
64 #if defined(__cplusplus) || defined(c_plusplus)
65 }
66 #endif
67 
68 #endif
static size_t OverAllocateMemory(const size_t length)
MagickSizeType length
Definition: matrix.c:73
#define MagickPrivate
MagickPrivate void ResetMaxMemoryRequest(void)
MagickPrivate void ResetVirtualAnonymousMemory(void)
Definition: memory.c:1345