memory-private.h

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00001 /*
00002   Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization
00003   dedicated to making software imaging solutions freely available.
00004   
00005   You may not use this file except in compliance with the License.  You may
00006   obtain a copy of the License at
00007   
00008     https://imagemagick.org/script/license.php
00009   
00010   Unless required by applicable law or agreed to in writing, software
00011   distributed under the License is distributed on an "AS IS" BASIS,
00012   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013   See the License for the specific language governing permissions and
00014   limitations under the License.
00015 
00016   MagickCore private memory methods.
00017 */
00018 #ifndef MAGICKCORE_MEMORY_PRIVATE_H
00019 #define MAGICKCORE_MEMORY_PRIVATE_H
00020 
00021 #if defined(__cplusplus) || defined(c_plusplus)
00022 extern "C" {
00023 #endif
00024 
00025 #include "MagickCore/exception-private.h"
00026 
00027 #if defined(__powerpc__)
00028 #  define CACHE_LINE_SIZE  (16*sizeof(void *))
00029 #else
00030 #  define CACHE_LINE_SIZE  (8*sizeof(void *))
00031 #endif
00032 
00033 #define CacheAlign(size)  ((size) < CACHE_LINE_SIZE ? CACHE_LINE_SIZE : (size))
00034 
00035 #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 6))
00036 #if !defined(__ICC)
00037 #define MagickAssumeAligned(address) \
00038   __builtin_assume_aligned((address),CACHE_LINE_SIZE)
00039 #else
00040 #define MagickAssumeAligned(address)  (address)
00041 #endif
00042 #else
00043 #define MagickAssumeAligned(address)  (address)
00044 #endif
00045 
00046 MagickExport MagickBooleanType 
00047   HeapOverflowSanityCheck(const size_t,const size_t);
00048 
00049 MagickExport size_t
00050   GetMaxMemoryRequest(void);
00051 
00052 extern MagickPrivate void
00053   ResetMaxMemoryRequest(void),
00054   ResetVirtualAnonymousMemory(void);
00055 
00056 static inline void *AcquireCriticalMemory(const size_t size)
00057 {
00058   register void
00059     *memory;
00060  
00061   /*
00062     Fail if memory request cannot be fulfilled.
00063   */
00064   memory=AcquireMagickMemory(size);
00065   if (memory == (void *) NULL)
00066     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
00067   return(memory);
00068 }
00069 
00070 #if defined(__cplusplus) || defined(c_plusplus)
00071 }
00072 #endif
00073 
00074 #endif

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