forked from openkylin/imagemagick
1546 lines
53 KiB
C
1546 lines
53 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% M M EEEEE M M OOO RRRR Y Y %
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% MM MM E MM MM O O R R Y Y %
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% M M M EEE M M M O O RRRR Y %
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% M M E M M O O R R Y %
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% M M EEEEE M M OOO R R Y %
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% %
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% %
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% MagickCore Memory Allocation Methods %
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% %
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% Software Design %
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% Cristy %
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% July 1998 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% We provide these memory allocators:
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%
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% AcquireCriticalMemory(): allocate a small memory request with
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% AcquireMagickMemory(), however, on fail throw a fatal exception and exit.
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% Free the memory reserve with RelinquishMagickMemory().
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% AcquireAlignedMemory(): allocate a small memory request that is aligned
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% on a cache line. On fail, return NULL for possible recovery.
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% Free the memory reserve with RelinquishMagickMemory().
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% AcquireMagickMemory()/ResizeMagickMemory(): allocate a small to medium
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% memory request, typically with malloc()/realloc(). On fail, return NULL
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% for possible recovery. Free the memory reserve with
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% RelinquishMagickMemory().
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% AcquireQuantumMemory()/ResizeQuantumMemory(): allocate a small to medium
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% memory request. This is a secure memory allocator as it accepts two
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% parameters, count and quantum, to ensure the request does not overflow.
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% It also check to ensure the request does not exceed the maximum memory
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% per the security policy. Free the memory reserve with
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% RelinquishMagickMemory().
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% AcquireVirtualMemory(): allocate a large memory request either in heap,
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% memory-mapped, or memory-mapped on disk depending on whether heap
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% allocation fails or if the request exceeds the maximum memory policy.
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% Free the memory reserve with RelinquishVirtualMemory().
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% ResetMagickMemory(): fills the bytes of the memory area with a constant
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% byte.
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%
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% In addition, we provide hooks for your own memory constructor/destructors.
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% You can also utilize our internal custom allocator as follows: Segregate
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% our memory requirements from any program that calls our API. This should
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% help reduce the risk of others changing our program state or causing memory
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% corruption.
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%
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% Our custom memory allocation manager implements a best-fit allocation policy
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% using segregated free lists. It uses a linear distribution of size classes
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% for lower sizes and a power of two distribution of size classes at higher
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% sizes. It is based on the paper, "Fast Memory Allocation using Lazy Fits."
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% written by Yoo C. Chung.
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%
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% By default, C's standard library is used (e.g. malloc); use the
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% custom memory allocator by defining MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT
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% to allocate memory with private anonymous mapping rather than from the
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% heap.
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%
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*/
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/*
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Include declarations.
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*/
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#include "magick/studio.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image-private.h"
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#include "magick/memory_.h"
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#include "magick/memory-private.h"
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#include "magick/policy.h"
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#include "magick/resource_.h"
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#include "magick/semaphore.h"
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#include "magick/string_.h"
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#include "magick/string-private.h"
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#include "magick/utility-private.h"
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/*
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Define declarations.
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*/
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#define BlockFooter(block,size) \
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((size_t *) ((char *) (block)+(size)-2*sizeof(size_t)))
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#define BlockHeader(block) ((size_t *) (block)-1)
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#define BlockThreshold 1024
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#define MaxBlockExponent 16
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#define MaxBlocks ((BlockThreshold/(4*sizeof(size_t)))+MaxBlockExponent+1)
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#define MaxSegments 1024
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#define NextBlock(block) ((char *) (block)+SizeOfBlock(block))
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#define NextBlockInList(block) (*(void **) (block))
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#define PreviousBlock(block) ((char *) (block)-(*((size_t *) (block)-2)))
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#define PreviousBlockBit 0x01
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#define PreviousBlockInList(block) (*((void **) (block)+1))
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#define SegmentSize (2*1024*1024)
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#define SizeMask (~0x01)
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#define SizeOfBlock(block) (*BlockHeader(block) & SizeMask)
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/*
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Typedef declarations.
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*/
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typedef enum
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{
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UndefinedVirtualMemory,
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AlignedVirtualMemory,
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MapVirtualMemory,
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UnalignedVirtualMemory
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} VirtualMemoryType;
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typedef struct _DataSegmentInfo
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{
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void
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*allocation,
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*bound;
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MagickBooleanType
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mapped;
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size_t
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length;
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struct _DataSegmentInfo
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*previous,
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*next;
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} DataSegmentInfo;
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typedef struct _MagickMemoryMethods
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{
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AcquireMemoryHandler
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acquire_memory_handler;
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ResizeMemoryHandler
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resize_memory_handler;
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DestroyMemoryHandler
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destroy_memory_handler;
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AcquireAlignedMemoryHandler
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acquire_aligned_memory_handler;
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RelinquishAlignedMemoryHandler
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relinquish_aligned_memory_handler;
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} MagickMemoryMethods;
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struct _MemoryInfo
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{
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char
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filename[MagickPathExtent];
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VirtualMemoryType
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type;
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size_t
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length;
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void
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*blob;
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size_t
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signature;
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};
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typedef struct _MemoryPool
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{
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size_t
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allocation;
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void
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*blocks[MaxBlocks+1];
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size_t
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number_segments;
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DataSegmentInfo
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*segments[MaxSegments],
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segment_pool[MaxSegments];
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} MemoryPool;
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/*
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Global declarations.
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*/
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static size_t
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max_memory_request = 0,
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virtual_anonymous_memory = 0;
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#if defined _MSC_VER
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static void *MSCMalloc(size_t size)
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{
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return(malloc(size));
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}
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static void *MSCRealloc(void* ptr, size_t size)
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{
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return(realloc(ptr,size));
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}
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static void MSCFree(void* ptr)
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{
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free(ptr);
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}
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#endif
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static MagickMemoryMethods
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memory_methods =
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{
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#if defined _MSC_VER
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(AcquireMemoryHandler) MSCMalloc,
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(ResizeMemoryHandler) MSCRealloc,
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(DestroyMemoryHandler) MSCFree,
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#else
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(AcquireMemoryHandler) malloc,
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(ResizeMemoryHandler) realloc,
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(DestroyMemoryHandler) free,
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#endif
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(AcquireAlignedMemoryHandler) NULL,
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(RelinquishAlignedMemoryHandler) NULL
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};
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#if defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
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static MemoryPool
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memory_pool;
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static SemaphoreInfo
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*memory_semaphore = (SemaphoreInfo *) NULL;
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static volatile DataSegmentInfo
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*free_segments = (DataSegmentInfo *) NULL;
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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ExpandHeap(size_t);
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#endif
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% A c q u i r e A l i g n e d M e m o r y %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% AcquireAlignedMemory() returns a pointer to a block of memory whose size is
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% at least (count*quantum) bytes, and whose address is aligned on a cache line.
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%
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% The format of the AcquireAlignedMemory method is:
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%
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% void *AcquireAlignedMemory(const size_t count,const size_t quantum)
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%
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% A description of each parameter follows:
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%
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% o count: the number of objects to allocate contiguously.
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%
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% o quantum: the size (in bytes) of each object.
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%
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*/
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#if defined(MAGICKCORE_HAVE_ALIGNED_MALLOC)
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#define AcquireAlignedMemory_Actual AcquireAlignedMemory_STDC
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static inline void *AcquireAlignedMemory_STDC(const size_t size)
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{
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size_t
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extent = CACHE_ALIGNED(size);
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if (extent < size)
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{
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errno=ENOMEM;
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return(NULL);
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}
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return(aligned_alloc(CACHE_LINE_SIZE,extent));
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}
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#elif defined(MAGICKCORE_HAVE_POSIX_MEMALIGN)
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#define AcquireAlignedMemory_Actual AcquireAlignedMemory_POSIX
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static inline void *AcquireAlignedMemory_POSIX(const size_t size)
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{
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void
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*memory;
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if (posix_memalign(&memory,CACHE_LINE_SIZE,size))
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return(NULL);
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return(memory);
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}
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#elif defined(MAGICKCORE_HAVE__ALIGNED_MALLOC)
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#define AcquireAlignedMemory_Actual AcquireAlignedMemory_WinAPI
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static inline void *AcquireAlignedMemory_WinAPI(const size_t size)
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{
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return(_aligned_malloc(size,CACHE_LINE_SIZE));
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}
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#else
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#define ALIGNMENT_OVERHEAD \
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(MAGICKCORE_MAX_ALIGNMENT_PADDING(CACHE_LINE_SIZE) + MAGICKCORE_SIZEOF_VOID_P)
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static inline void *reserve_space_for_actual_base_address(void *const p)
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{
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return((void **) p+1);
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}
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static inline void **pointer_to_space_for_actual_base_address(void *const p)
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{
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return((void **) p-1);
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}
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static inline void *actual_base_address(void *const p)
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{
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return(*pointer_to_space_for_actual_base_address(p));
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}
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static inline void *align_to_cache(void *const p)
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{
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return((void *) CACHE_ALIGNED((MagickAddressType) p));
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}
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static inline void *adjust(void *const p)
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{
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return(align_to_cache(reserve_space_for_actual_base_address(p)));
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}
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#define AcquireAlignedMemory_Actual AcquireAlignedMemory_Generic
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static inline void *AcquireAlignedMemory_Generic(const size_t size)
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{
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size_t
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extent;
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void
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*memory,
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*p;
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#if SIZE_MAX < ALIGNMENT_OVERHEAD
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#error "CACHE_LINE_SIZE is way too big."
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#endif
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extent=(size+ALIGNMENT_OVERHEAD);
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if (extent <= size)
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{
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errno=ENOMEM;
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return(NULL);
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}
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p=AcquireMagickMemory(extent);
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if (p == NULL)
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return(NULL);
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memory=adjust(p);
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*pointer_to_space_for_actual_base_address(memory)=p;
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return(memory);
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}
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#endif
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MagickExport void *AcquireAlignedMemory(const size_t count,const size_t quantum)
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{
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size_t
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size;
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if (HeapOverflowSanityCheckGetSize(count,quantum,&size) != MagickFalse)
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{
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errno=ENOMEM;
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return(NULL);
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}
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if (memory_methods.acquire_aligned_memory_handler != (AcquireAlignedMemoryHandler) NULL)
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return(memory_methods.acquire_aligned_memory_handler(size,CACHE_LINE_SIZE));
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return(AcquireAlignedMemory_Actual(size));
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}
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#if defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
|
||
% %
|
||
+ A c q u i r e B l o c k %
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||
% %
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||
% %
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||
% %
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||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
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%
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% AcquireBlock() returns a pointer to a block of memory at least size bytes
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% suitably aligned for any use.
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%
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% The format of the AcquireBlock method is:
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%
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% void *AcquireBlock(const size_t size)
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%
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% A description of each parameter follows:
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||
%
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||
% o size: the size of the memory in bytes to allocate.
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||
%
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||
*/
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||
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||
static inline size_t AllocationPolicy(size_t size)
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{
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size_t
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blocksize;
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/*
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||
The linear distribution.
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||
*/
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assert(size != 0);
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assert(size % (4*sizeof(size_t)) == 0);
|
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if (size <= BlockThreshold)
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return(size/(4*sizeof(size_t)));
|
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/*
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Check for the largest block size.
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*/
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if (size > (size_t) (BlockThreshold*(1L << (MaxBlockExponent-1L))))
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return(MaxBlocks-1L);
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/*
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Otherwise use a power of two distribution.
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*/
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blocksize=BlockThreshold/(4*sizeof(size_t));
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for ( ; size > BlockThreshold; size/=2)
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blocksize++;
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assert(blocksize > (BlockThreshold/(4*sizeof(size_t))));
|
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assert(blocksize < (MaxBlocks-1L));
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return(blocksize);
|
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}
|
||
|
||
static inline void InsertFreeBlock(void *block,const size_t i)
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{
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void
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||
*next,
|
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*previous;
|
||
|
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size_t
|
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size;
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|
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size=SizeOfBlock(block);
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previous=(void *) NULL;
|
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next=memory_pool.blocks[i];
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while ((next != (void *) NULL) && (SizeOfBlock(next) < size))
|
||
{
|
||
previous=next;
|
||
next=NextBlockInList(next);
|
||
}
|
||
PreviousBlockInList(block)=previous;
|
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NextBlockInList(block)=next;
|
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if (previous != (void *) NULL)
|
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NextBlockInList(previous)=block;
|
||
else
|
||
memory_pool.blocks[i]=block;
|
||
if (next != (void *) NULL)
|
||
PreviousBlockInList(next)=block;
|
||
}
|
||
|
||
static inline void RemoveFreeBlock(void *block,const size_t i)
|
||
{
|
||
void
|
||
*next,
|
||
*previous;
|
||
|
||
next=NextBlockInList(block);
|
||
previous=PreviousBlockInList(block);
|
||
if (previous == (void *) NULL)
|
||
memory_pool.blocks[i]=next;
|
||
else
|
||
NextBlockInList(previous)=next;
|
||
if (next != (void *) NULL)
|
||
PreviousBlockInList(next)=previous;
|
||
}
|
||
|
||
static void *AcquireBlock(size_t size)
|
||
{
|
||
size_t
|
||
i;
|
||
|
||
void
|
||
*block;
|
||
|
||
/*
|
||
Find free block.
|
||
*/
|
||
size=(size_t) (size+sizeof(size_t)+6*sizeof(size_t)-1) & -(4U*sizeof(size_t));
|
||
i=AllocationPolicy(size);
|
||
block=memory_pool.blocks[i];
|
||
while ((block != (void *) NULL) && (SizeOfBlock(block) < size))
|
||
block=NextBlockInList(block);
|
||
if (block == (void *) NULL)
|
||
{
|
||
i++;
|
||
while (memory_pool.blocks[i] == (void *) NULL)
|
||
i++;
|
||
block=memory_pool.blocks[i];
|
||
if (i >= MaxBlocks)
|
||
return((void *) NULL);
|
||
}
|
||
assert((*BlockHeader(NextBlock(block)) & PreviousBlockBit) == 0);
|
||
assert(SizeOfBlock(block) >= size);
|
||
RemoveFreeBlock(block,AllocationPolicy(SizeOfBlock(block)));
|
||
if (SizeOfBlock(block) > size)
|
||
{
|
||
size_t
|
||
blocksize;
|
||
|
||
void
|
||
*next;
|
||
|
||
/*
|
||
Split block.
|
||
*/
|
||
next=(char *) block+size;
|
||
blocksize=SizeOfBlock(block)-size;
|
||
*BlockHeader(next)=blocksize;
|
||
*BlockFooter(next,blocksize)=blocksize;
|
||
InsertFreeBlock(next,AllocationPolicy(blocksize));
|
||
*BlockHeader(block)=size | (*BlockHeader(block) & ~SizeMask);
|
||
}
|
||
assert(size == SizeOfBlock(block));
|
||
*BlockHeader(NextBlock(block))|=PreviousBlockBit;
|
||
memory_pool.allocation+=size;
|
||
return(block);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% A c q u i r e M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% AcquireMagickMemory() returns a pointer to a block of memory at least size
|
||
% bytes suitably aligned for any use.
|
||
%
|
||
% The format of the AcquireMagickMemory method is:
|
||
%
|
||
% void *AcquireMagickMemory(const size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o size: the size of the memory in bytes to allocate.
|
||
%
|
||
*/
|
||
MagickExport void *AcquireMagickMemory(const size_t size)
|
||
{
|
||
void
|
||
*memory;
|
||
|
||
#if !defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
memory=memory_methods.acquire_memory_handler(size == 0 ? 1UL : size);
|
||
#else
|
||
if (memory_semaphore == (SemaphoreInfo *) NULL)
|
||
ActivateSemaphoreInfo(&memory_semaphore);
|
||
if (free_segments == (DataSegmentInfo *) NULL)
|
||
{
|
||
LockSemaphoreInfo(memory_semaphore);
|
||
if (free_segments == (DataSegmentInfo *) NULL)
|
||
{
|
||
ssize_t
|
||
i;
|
||
|
||
assert(2*sizeof(size_t) > (size_t) (~SizeMask));
|
||
(void) memset(&memory_pool,0,sizeof(memory_pool));
|
||
memory_pool.allocation=SegmentSize;
|
||
memory_pool.blocks[MaxBlocks]=(void *) (-1);
|
||
for (i=0; i < MaxSegments; i++)
|
||
{
|
||
if (i != 0)
|
||
memory_pool.segment_pool[i].previous=
|
||
(&memory_pool.segment_pool[i-1]);
|
||
if (i != (MaxSegments-1))
|
||
memory_pool.segment_pool[i].next=(&memory_pool.segment_pool[i+1]);
|
||
}
|
||
free_segments=(&memory_pool.segment_pool[0]);
|
||
}
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
}
|
||
LockSemaphoreInfo(memory_semaphore);
|
||
memory=AcquireBlock(size == 0 ? 1UL : size);
|
||
if (memory == (void *) NULL)
|
||
{
|
||
if (ExpandHeap(size == 0 ? 1UL : size) != MagickFalse)
|
||
memory=AcquireBlock(size == 0 ? 1UL : size);
|
||
}
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
#endif
|
||
return(memory);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% A c q u i r e C r i t i c a l M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% AcquireCriticalMemory() is just like AcquireMagickMemory(), throws a fatal
|
||
% exception if the memory cannot be acquired.
|
||
%
|
||
% That is, AcquireCriticalMemory() returns a pointer to a block of memory that
|
||
% is at least size bytes, and that is suitably aligned for any use; however,
|
||
% if this is not possible, it throws an exception and terminates the program
|
||
% as unceremoniously as possible.
|
||
%
|
||
% The format of the AcquireCriticalMemory method is:
|
||
%
|
||
% void *AcquireCriticalMemory(const size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o size: the size (in bytes) of the memory to allocate.
|
||
%
|
||
*/
|
||
MagickExport void *AcquireCriticalMemory(const size_t size)
|
||
{
|
||
void
|
||
*memory;
|
||
|
||
/*
|
||
Fail if memory request cannot be fulfilled.
|
||
*/
|
||
memory=AcquireMagickMemory(size);
|
||
if (memory == (void *) NULL)
|
||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||
return(memory);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% A c q u i r e Q u a n t u m M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% AcquireQuantumMemory() returns a pointer to a block of memory at least
|
||
% count * quantum bytes suitably aligned for any use.
|
||
%
|
||
% The format of the AcquireQuantumMemory method is:
|
||
%
|
||
% void *AcquireQuantumMemory(const size_t count,const size_t quantum)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o count: the number of objects to allocate contiguously.
|
||
%
|
||
% o quantum: the size (in bytes) of each object.
|
||
%
|
||
*/
|
||
MagickExport void *AcquireQuantumMemory(const size_t count,const size_t quantum)
|
||
{
|
||
size_t
|
||
size;
|
||
|
||
if ((HeapOverflowSanityCheckGetSize(count,quantum,&size) != MagickFalse) ||
|
||
(size > GetMaxMemoryRequest()))
|
||
{
|
||
errno=ENOMEM;
|
||
return(NULL);
|
||
}
|
||
return(AcquireMagickMemory(size));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% A c q u i r e V i r t u a l M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% AcquireVirtualMemory() allocates a pointer to a block of memory at least
|
||
% size bytes suitably aligned for any use. In addition to heap, it also
|
||
% supports memory-mapped and file-based memory-mapped memory requests.
|
||
%
|
||
% The format of the AcquireVirtualMemory method is:
|
||
%
|
||
% MemoryInfo *AcquireVirtualMemory(const size_t count,const size_t quantum)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o count: the number of objects to allocate contiguously.
|
||
%
|
||
% o quantum: the size (in bytes) of each object.
|
||
%
|
||
*/
|
||
MagickExport MemoryInfo *AcquireVirtualMemory(const size_t count,
|
||
const size_t quantum)
|
||
{
|
||
char
|
||
*value;
|
||
|
||
MemoryInfo
|
||
*memory_info;
|
||
|
||
size_t
|
||
size;
|
||
|
||
if (HeapOverflowSanityCheckGetSize(count,quantum,&size) != MagickFalse)
|
||
{
|
||
errno=ENOMEM;
|
||
return((MemoryInfo *) NULL);
|
||
}
|
||
if (virtual_anonymous_memory == 0)
|
||
{
|
||
virtual_anonymous_memory=1;
|
||
value=GetPolicyValue("system:memory-map");
|
||
if (LocaleCompare(value,"anonymous") == 0)
|
||
{
|
||
/*
|
||
The security policy sets anonymous mapping for the memory request.
|
||
*/
|
||
#if defined(MAGICKCORE_HAVE_MMAP) && defined(MAP_ANONYMOUS)
|
||
virtual_anonymous_memory=2;
|
||
#endif
|
||
}
|
||
value=DestroyString(value);
|
||
}
|
||
memory_info=(MemoryInfo *) MagickAssumeAligned(AcquireAlignedMemory(1,
|
||
sizeof(*memory_info)));
|
||
if (memory_info == (MemoryInfo *) NULL)
|
||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||
(void) memset(memory_info,0,sizeof(*memory_info));
|
||
memory_info->length=size;
|
||
memory_info->signature=MagickCoreSignature;
|
||
if ((virtual_anonymous_memory == 1) && (size <= GetMaxMemoryRequest()))
|
||
{
|
||
memory_info->blob=AcquireAlignedMemory(1,size);
|
||
if (memory_info->blob != NULL)
|
||
memory_info->type=AlignedVirtualMemory;
|
||
}
|
||
if (memory_info->blob == NULL)
|
||
{
|
||
/*
|
||
Acquire anonymous memory map.
|
||
*/
|
||
memory_info->blob=NULL;
|
||
if (size <= GetMaxMemoryRequest())
|
||
memory_info->blob=MapBlob(-1,IOMode,0,size);
|
||
if (memory_info->blob != NULL)
|
||
memory_info->type=MapVirtualMemory;
|
||
else
|
||
{
|
||
int
|
||
file;
|
||
|
||
/*
|
||
Anonymous memory mapping failed, try file-backed memory mapping.
|
||
*/
|
||
file=AcquireUniqueFileResource(memory_info->filename);
|
||
if (file != -1)
|
||
{
|
||
MagickOffsetType
|
||
offset;
|
||
|
||
offset=(MagickOffsetType) lseek(file,size-1,SEEK_SET);
|
||
if ((offset == (MagickOffsetType) (size-1)) &&
|
||
(write(file,"",1) == 1))
|
||
{
|
||
#if !defined(MAGICKCORE_HAVE_POSIX_FALLOCATE)
|
||
memory_info->blob=MapBlob(file,IOMode,0,size);
|
||
#else
|
||
if (posix_fallocate(file,0,(MagickOffsetType) size) == 0)
|
||
memory_info->blob=MapBlob(file,IOMode,0,size);
|
||
#endif
|
||
if (memory_info->blob != NULL)
|
||
memory_info->type=MapVirtualMemory;
|
||
else
|
||
{
|
||
(void) RelinquishUniqueFileResource(
|
||
memory_info->filename);
|
||
*memory_info->filename='\0';
|
||
}
|
||
}
|
||
(void) close(file);
|
||
}
|
||
}
|
||
}
|
||
if (memory_info->blob == NULL)
|
||
{
|
||
memory_info->blob=AcquireQuantumMemory(1,size);
|
||
if (memory_info->blob != NULL)
|
||
memory_info->type=UnalignedVirtualMemory;
|
||
}
|
||
if (memory_info->blob == NULL)
|
||
memory_info=RelinquishVirtualMemory(memory_info);
|
||
return(memory_info);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% C o p y M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% CopyMagickMemory() copies size bytes from memory area source to the
|
||
% destination. Copying between objects that overlap will take place
|
||
% correctly. It returns destination.
|
||
%
|
||
% The format of the CopyMagickMemory method is:
|
||
%
|
||
% void *CopyMagickMemory(void *magick_restrict destination,
|
||
% const void *magick_restrict source,const size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o destination: the destination.
|
||
%
|
||
% o source: the source.
|
||
%
|
||
% o size: the size of the memory in bytes to allocate.
|
||
%
|
||
*/
|
||
MagickExport void *CopyMagickMemory(void *magick_restrict destination,
|
||
const void *magick_restrict source,const size_t size)
|
||
{
|
||
const unsigned char
|
||
*p;
|
||
|
||
unsigned char
|
||
*q;
|
||
|
||
assert(destination != (void *) NULL);
|
||
assert(source != (const void *) NULL);
|
||
p=(const unsigned char *) source;
|
||
q=(unsigned char *) destination;
|
||
if (((q+size) < p) || (q > (p+size)))
|
||
switch (size)
|
||
{
|
||
default: return(memcpy(destination,source,size));
|
||
case 8: *q++=(*p++);
|
||
case 7: *q++=(*p++);
|
||
case 6: *q++=(*p++);
|
||
case 5: *q++=(*p++);
|
||
case 4: *q++=(*p++);
|
||
case 3: *q++=(*p++);
|
||
case 2: *q++=(*p++);
|
||
case 1: *q++=(*p++);
|
||
case 0: return(destination);
|
||
}
|
||
return(memmove(destination,source,size));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
+ D e s t r o y M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% DestroyMagickMemory() deallocates memory associated with the memory manager.
|
||
%
|
||
% The format of the DestroyMagickMemory method is:
|
||
%
|
||
% DestroyMagickMemory(void)
|
||
%
|
||
*/
|
||
MagickExport void DestroyMagickMemory(void)
|
||
{
|
||
#if defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
ssize_t
|
||
i;
|
||
|
||
if (memory_semaphore == (SemaphoreInfo *) NULL)
|
||
ActivateSemaphoreInfo(&memory_semaphore);
|
||
LockSemaphoreInfo(memory_semaphore);
|
||
for (i=0; i < (ssize_t) memory_pool.number_segments; i++)
|
||
if (memory_pool.segments[i]->mapped == MagickFalse)
|
||
memory_methods.destroy_memory_handler(
|
||
memory_pool.segments[i]->allocation);
|
||
else
|
||
(void) UnmapBlob(memory_pool.segments[i]->allocation,
|
||
memory_pool.segments[i]->length);
|
||
free_segments=(DataSegmentInfo *) NULL;
|
||
(void) memset(&memory_pool,0,sizeof(memory_pool));
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
DestroySemaphoreInfo(&memory_semaphore);
|
||
#endif
|
||
}
|
||
|
||
#if defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
+ E x p a n d H e a p %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ExpandHeap() get more memory from the system. It returns MagickTrue on
|
||
% success otherwise MagickFalse.
|
||
%
|
||
% The format of the ExpandHeap method is:
|
||
%
|
||
% MagickBooleanType ExpandHeap(size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o size: the size of the memory in bytes we require.
|
||
%
|
||
*/
|
||
static MagickBooleanType ExpandHeap(size_t size)
|
||
{
|
||
DataSegmentInfo
|
||
*segment_info;
|
||
|
||
MagickBooleanType
|
||
mapped;
|
||
|
||
ssize_t
|
||
i;
|
||
|
||
void
|
||
*block;
|
||
|
||
size_t
|
||
blocksize;
|
||
|
||
void
|
||
*segment;
|
||
|
||
blocksize=((size+12*sizeof(size_t))+SegmentSize-1) & -SegmentSize;
|
||
assert(memory_pool.number_segments < MaxSegments);
|
||
segment=MapBlob(-1,IOMode,0,blocksize);
|
||
mapped=segment != (void *) NULL ? MagickTrue : MagickFalse;
|
||
if (segment == (void *) NULL)
|
||
segment=(void *) memory_methods.acquire_memory_handler(blocksize);
|
||
if (segment == (void *) NULL)
|
||
return(MagickFalse);
|
||
segment_info=(DataSegmentInfo *) free_segments;
|
||
free_segments=segment_info->next;
|
||
segment_info->mapped=mapped;
|
||
segment_info->length=blocksize;
|
||
segment_info->allocation=segment;
|
||
segment_info->bound=(char *) segment+blocksize;
|
||
i=(ssize_t) memory_pool.number_segments-1;
|
||
for ( ; (i >= 0) && (memory_pool.segments[i]->allocation > segment); i--)
|
||
memory_pool.segments[i+1]=memory_pool.segments[i];
|
||
memory_pool.segments[i+1]=segment_info;
|
||
memory_pool.number_segments++;
|
||
size=blocksize-12*sizeof(size_t);
|
||
block=(char *) segment_info->allocation+4*sizeof(size_t);
|
||
*BlockHeader(block)=size | PreviousBlockBit;
|
||
*BlockFooter(block,size)=size;
|
||
InsertFreeBlock(block,AllocationPolicy(size));
|
||
block=NextBlock(block);
|
||
assert(block < segment_info->bound);
|
||
*BlockHeader(block)=2*sizeof(size_t);
|
||
*BlockHeader(NextBlock(block))=PreviousBlockBit;
|
||
return(MagickTrue);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% G e t M a g i c k M e m o r y M e t h o d s %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% GetMagickMemoryMethods() gets the methods to acquire, resize, and destroy
|
||
% memory.
|
||
%
|
||
% The format of the GetMagickMemoryMethods() method is:
|
||
%
|
||
% void GetMagickMemoryMethods(AcquireMemoryHandler *acquire_memory_handler,
|
||
% ResizeMemoryHandler *resize_memory_handler,
|
||
% DestroyMemoryHandler *destroy_memory_handler)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o acquire_memory_handler: method to acquire memory (e.g. malloc).
|
||
%
|
||
% o resize_memory_handler: method to resize memory (e.g. realloc).
|
||
%
|
||
% o destroy_memory_handler: method to destroy memory (e.g. free).
|
||
%
|
||
*/
|
||
MagickExport void GetMagickMemoryMethods(
|
||
AcquireMemoryHandler *acquire_memory_handler,
|
||
ResizeMemoryHandler *resize_memory_handler,
|
||
DestroyMemoryHandler *destroy_memory_handler)
|
||
{
|
||
assert(acquire_memory_handler != (AcquireMemoryHandler *) NULL);
|
||
assert(resize_memory_handler != (ResizeMemoryHandler *) NULL);
|
||
assert(destroy_memory_handler != (DestroyMemoryHandler *) NULL);
|
||
*acquire_memory_handler=memory_methods.acquire_memory_handler;
|
||
*resize_memory_handler=memory_methods.resize_memory_handler;
|
||
*destroy_memory_handler=memory_methods.destroy_memory_handler;
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
+ G e t M a x M e m o r y R e q u e s t %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% GetMaxMemoryRequest() returns the max memory request value.
|
||
%
|
||
% The format of the GetMaxMemoryRequest method is:
|
||
%
|
||
% size_t GetMaxMemoryRequest(void)
|
||
%
|
||
*/
|
||
MagickExport size_t GetMaxMemoryRequest(void)
|
||
{
|
||
#define MinMemoryRequest "16MiB"
|
||
|
||
if (max_memory_request == 0)
|
||
{
|
||
char
|
||
*value;
|
||
|
||
max_memory_request=(size_t) MagickULLConstant(~0);
|
||
value=GetPolicyValue("system:max-memory-request");
|
||
if (value != (char *) NULL)
|
||
{
|
||
/*
|
||
The security policy sets a max memory request limit.
|
||
*/
|
||
max_memory_request=MagickMax(StringToSizeType(value,100.0),
|
||
StringToSizeType(MinMemoryRequest,100.0));
|
||
value=DestroyString(value);
|
||
}
|
||
}
|
||
return(MagickMin(max_memory_request,MAGICK_SSIZE_MAX));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% G e t V i r t u a l M e m o r y B l o b %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% GetVirtualMemoryBlob() returns the virtual memory blob associated with the
|
||
% specified MemoryInfo structure.
|
||
%
|
||
% The format of the GetVirtualMemoryBlob method is:
|
||
%
|
||
% void *GetVirtualMemoryBlob(const MemoryInfo *memory_info)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory_info: The MemoryInfo structure.
|
||
*/
|
||
MagickExport void *GetVirtualMemoryBlob(const MemoryInfo *memory_info)
|
||
{
|
||
assert(memory_info != (const MemoryInfo *) NULL);
|
||
assert(memory_info->signature == MagickCoreSignature);
|
||
return(memory_info->blob);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e l i n q u i s h A l i g n e d M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RelinquishAlignedMemory() frees memory acquired with AcquireAlignedMemory()
|
||
% or reuse.
|
||
%
|
||
% The format of the RelinquishAlignedMemory method is:
|
||
%
|
||
% void *RelinquishAlignedMemory(void *memory)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory: A pointer to a block of memory to free for reuse.
|
||
%
|
||
*/
|
||
MagickExport void *RelinquishAlignedMemory(void *memory)
|
||
{
|
||
if (memory == (void *) NULL)
|
||
return((void *) NULL);
|
||
if (memory_methods.relinquish_aligned_memory_handler != (RelinquishAlignedMemoryHandler) NULL)
|
||
{
|
||
memory_methods.relinquish_aligned_memory_handler(memory);
|
||
return(NULL);
|
||
}
|
||
#if defined(MAGICKCORE_HAVE_ALIGNED_MALLOC) || defined(MAGICKCORE_HAVE_POSIX_MEMALIGN)
|
||
free(memory);
|
||
#elif defined(MAGICKCORE_HAVE__ALIGNED_MALLOC)
|
||
_aligned_free(memory);
|
||
#else
|
||
RelinquishMagickMemory(actual_base_address(memory));
|
||
#endif
|
||
return(NULL);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e l i n q u i s h M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RelinquishMagickMemory() frees memory acquired with AcquireMagickMemory()
|
||
% or AcquireQuantumMemory() for reuse.
|
||
%
|
||
% The format of the RelinquishMagickMemory method is:
|
||
%
|
||
% void *RelinquishMagickMemory(void *memory)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory: A pointer to a block of memory to free for reuse.
|
||
%
|
||
*/
|
||
MagickExport void *RelinquishMagickMemory(void *memory)
|
||
{
|
||
if (memory == (void *) NULL)
|
||
return((void *) NULL);
|
||
#if !defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
memory_methods.destroy_memory_handler(memory);
|
||
#else
|
||
LockSemaphoreInfo(memory_semaphore);
|
||
assert((SizeOfBlock(memory) % (4*sizeof(size_t))) == 0);
|
||
assert((*BlockHeader(NextBlock(memory)) & PreviousBlockBit) != 0);
|
||
if ((*BlockHeader(memory) & PreviousBlockBit) == 0)
|
||
{
|
||
void
|
||
*previous;
|
||
|
||
/*
|
||
Coalesce with previous adjacent block.
|
||
*/
|
||
previous=PreviousBlock(memory);
|
||
RemoveFreeBlock(previous,AllocationPolicy(SizeOfBlock(previous)));
|
||
*BlockHeader(previous)=(SizeOfBlock(previous)+SizeOfBlock(memory)) |
|
||
(*BlockHeader(previous) & ~SizeMask);
|
||
memory=previous;
|
||
}
|
||
if ((*BlockHeader(NextBlock(NextBlock(memory))) & PreviousBlockBit) == 0)
|
||
{
|
||
void
|
||
*next;
|
||
|
||
/*
|
||
Coalesce with next adjacent block.
|
||
*/
|
||
next=NextBlock(memory);
|
||
RemoveFreeBlock(next,AllocationPolicy(SizeOfBlock(next)));
|
||
*BlockHeader(memory)=(SizeOfBlock(memory)+SizeOfBlock(next)) |
|
||
(*BlockHeader(memory) & ~SizeMask);
|
||
}
|
||
*BlockFooter(memory,SizeOfBlock(memory))=SizeOfBlock(memory);
|
||
*BlockHeader(NextBlock(memory))&=(~PreviousBlockBit);
|
||
InsertFreeBlock(memory,AllocationPolicy(SizeOfBlock(memory)));
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
#endif
|
||
return((void *) NULL);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e l i n q u i s h V i r t u a l M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RelinquishVirtualMemory() frees memory acquired with AcquireVirtualMemory().
|
||
%
|
||
% The format of the RelinquishVirtualMemory method is:
|
||
%
|
||
% MemoryInfo *RelinquishVirtualMemory(MemoryInfo *memory_info)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory_info: A pointer to a block of memory to free for reuse.
|
||
%
|
||
*/
|
||
MagickExport MemoryInfo *RelinquishVirtualMemory(MemoryInfo *memory_info)
|
||
{
|
||
assert(memory_info != (MemoryInfo *) NULL);
|
||
assert(memory_info->signature == MagickCoreSignature);
|
||
if (memory_info->blob != (void *) NULL)
|
||
switch (memory_info->type)
|
||
{
|
||
case AlignedVirtualMemory:
|
||
{
|
||
memory_info->blob=RelinquishAlignedMemory(memory_info->blob);
|
||
break;
|
||
}
|
||
case MapVirtualMemory:
|
||
{
|
||
(void) UnmapBlob(memory_info->blob,memory_info->length);
|
||
memory_info->blob=NULL;
|
||
if (*memory_info->filename != '\0')
|
||
(void) RelinquishUniqueFileResource(memory_info->filename);
|
||
break;
|
||
}
|
||
case UnalignedVirtualMemory:
|
||
default:
|
||
{
|
||
memory_info->blob=RelinquishMagickMemory(memory_info->blob);
|
||
break;
|
||
}
|
||
}
|
||
memory_info->signature=(~MagickCoreSignature);
|
||
memory_info=(MemoryInfo *) RelinquishAlignedMemory(memory_info);
|
||
return(memory_info);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e s e t M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ResetMagickMemory() fills the first size bytes of the memory area pointed to
|
||
% by memory with the constant byte c.
|
||
%
|
||
% The format of the ResetMagickMemory method is:
|
||
%
|
||
% void *ResetMagickMemory(void *memory,int byte,const size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory: a pointer to a memory allocation.
|
||
%
|
||
% o byte: set the memory to this value.
|
||
%
|
||
% o size: size of the memory to reset.
|
||
%
|
||
*/
|
||
MagickExport void *ResetMagickMemory(void *memory,int byte,const size_t size)
|
||
{
|
||
assert(memory != (void *) NULL);
|
||
return(memset(memory,byte,size));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
+ R e s e t M a x M e m o r y R e q u e s t %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ResetMaxMemoryRequest() resets the max_memory_request value.
|
||
%
|
||
% The format of the ResetMaxMemoryRequest method is:
|
||
%
|
||
% void ResetMaxMemoryRequest(void)
|
||
%
|
||
*/
|
||
MagickPrivate void ResetMaxMemoryRequest(void)
|
||
{
|
||
max_memory_request=0;
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
+ R e s e t V i r t u a l A n o n y m o u s M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ResetVirtualAnonymousMemory() resets the virtual_anonymous_memory value.
|
||
%
|
||
% The format of the ResetVirtualAnonymousMemory method is:
|
||
%
|
||
% void ResetVirtualAnonymousMemory(void)
|
||
%
|
||
*/
|
||
MagickPrivate void ResetVirtualAnonymousMemory(void)
|
||
{
|
||
virtual_anonymous_memory=0;
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e s i z e M a g i c k M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ResizeMagickMemory() changes the size of the memory and returns a pointer to
|
||
% the (possibly moved) block. The contents will be unchanged up to the
|
||
% lesser of the new and old sizes.
|
||
%
|
||
% The format of the ResizeMagickMemory method is:
|
||
%
|
||
% void *ResizeMagickMemory(void *memory,const size_t size)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory: A pointer to a memory allocation.
|
||
%
|
||
% o size: the new size of the allocated memory.
|
||
%
|
||
*/
|
||
|
||
#if defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
static inline void *ResizeBlock(void *block,size_t size)
|
||
{
|
||
void
|
||
*memory;
|
||
|
||
if (block == (void *) NULL)
|
||
return(AcquireBlock(size));
|
||
memory=AcquireBlock(size);
|
||
if (memory == (void *) NULL)
|
||
return((void *) NULL);
|
||
if (size <= (SizeOfBlock(block)-sizeof(size_t)))
|
||
(void) memcpy(memory,block,size);
|
||
else
|
||
(void) memcpy(memory,block,SizeOfBlock(block)-sizeof(size_t));
|
||
memory_pool.allocation+=size;
|
||
return(memory);
|
||
}
|
||
#endif
|
||
|
||
MagickExport void *ResizeMagickMemory(void *memory,const size_t size)
|
||
{
|
||
void
|
||
*block;
|
||
|
||
if (memory == (void *) NULL)
|
||
return(AcquireMagickMemory(size));
|
||
#if !defined(MAGICKCORE_ANONYMOUS_MEMORY_SUPPORT)
|
||
block=memory_methods.resize_memory_handler(memory,size == 0 ? 1UL : size);
|
||
if (block == (void *) NULL)
|
||
memory=RelinquishMagickMemory(memory);
|
||
#else
|
||
LockSemaphoreInfo(memory_semaphore);
|
||
block=ResizeBlock(memory,size == 0 ? 1UL : size);
|
||
if (block == (void *) NULL)
|
||
{
|
||
if (ExpandHeap(size == 0 ? 1UL : size) == MagickFalse)
|
||
{
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
memory=RelinquishMagickMemory(memory);
|
||
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
|
||
}
|
||
block=ResizeBlock(memory,size == 0 ? 1UL : size);
|
||
assert(block != (void *) NULL);
|
||
}
|
||
UnlockSemaphoreInfo(memory_semaphore);
|
||
memory=RelinquishMagickMemory(memory);
|
||
#endif
|
||
return(block);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e s i z e Q u a n t u m M e m o r y %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ResizeQuantumMemory() changes the size of the memory and returns a pointer
|
||
% to the (possibly moved) block. The contents will be unchanged up to the
|
||
% lesser of the new and old sizes.
|
||
%
|
||
% The format of the ResizeQuantumMemory method is:
|
||
%
|
||
% void *ResizeQuantumMemory(void *memory,const size_t count,
|
||
% const size_t quantum)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o memory: A pointer to a memory allocation.
|
||
%
|
||
% o count: the number of objects to allocate contiguously.
|
||
%
|
||
% o quantum: the size (in bytes) of each object.
|
||
%
|
||
*/
|
||
MagickExport void *ResizeQuantumMemory(void *memory,const size_t count,
|
||
const size_t quantum)
|
||
{
|
||
size_t
|
||
size;
|
||
|
||
if ((HeapOverflowSanityCheckGetSize(count,quantum,&size) != MagickFalse) ||
|
||
(size > GetMaxMemoryRequest()))
|
||
{
|
||
errno=ENOMEM;
|
||
memory=RelinquishMagickMemory(memory);
|
||
return(NULL);
|
||
}
|
||
if (size > GetMaxMemoryRequest())
|
||
return(NULL);
|
||
return(ResizeMagickMemory(memory,size));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% S e t M a g i c k A l i g n e d M e m o r y M e t h o d s %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% SetMagickAlignedMemoryMethods() sets the methods to acquire and relinquish
|
||
% aligned memory.
|
||
%
|
||
% The format of the SetMagickAlignedMemoryMethods() method is:
|
||
%
|
||
% SetMagickAlignedMemoryMethods(
|
||
% AcquireAlignedMemoryHandler acquire_aligned_memory_handler,
|
||
% RelinquishAlignedMemoryHandler relinquish_aligned_memory_handler)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o acquire_memory_handler: method to acquire aligned memory.
|
||
%
|
||
% o relinquish_aligned_memory_handler: method to relinquish aligned memory.
|
||
%
|
||
*/
|
||
MagickExport void SetMagickAlignedMemoryMethods(
|
||
AcquireAlignedMemoryHandler acquire_aligned_memory_handler,
|
||
RelinquishAlignedMemoryHandler relinquish_aligned_memory_handler)
|
||
{
|
||
memory_methods.acquire_aligned_memory_handler=acquire_aligned_memory_handler;
|
||
memory_methods.relinquish_aligned_memory_handler=
|
||
relinquish_aligned_memory_handler;
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% S e t M a g i c k M e m o r y M e t h o d s %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% SetMagickMemoryMethods() sets the methods to acquire, resize, and destroy
|
||
% memory. Your custom memory methods must be set prior to the
|
||
% MagickCoreGenesis() method.
|
||
%
|
||
% The format of the SetMagickMemoryMethods() method is:
|
||
%
|
||
% SetMagickMemoryMethods(AcquireMemoryHandler acquire_memory_handler,
|
||
% ResizeMemoryHandler resize_memory_handler,
|
||
% DestroyMemoryHandler destroy_memory_handler)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o acquire_memory_handler: method to acquire memory (e.g. malloc).
|
||
%
|
||
% o resize_memory_handler: method to resize memory (e.g. realloc).
|
||
%
|
||
% o destroy_memory_handler: method to destroy memory (e.g. free).
|
||
%
|
||
*/
|
||
MagickExport void SetMagickMemoryMethods(
|
||
AcquireMemoryHandler acquire_memory_handler,
|
||
ResizeMemoryHandler resize_memory_handler,
|
||
DestroyMemoryHandler destroy_memory_handler)
|
||
{
|
||
/*
|
||
Set memory methods.
|
||
*/
|
||
if (acquire_memory_handler != (AcquireMemoryHandler) NULL)
|
||
memory_methods.acquire_memory_handler=acquire_memory_handler;
|
||
if (resize_memory_handler != (ResizeMemoryHandler) NULL)
|
||
memory_methods.resize_memory_handler=resize_memory_handler;
|
||
if (destroy_memory_handler != (DestroyMemoryHandler) NULL)
|
||
memory_methods.destroy_memory_handler=destroy_memory_handler;
|
||
}
|