random-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 random generation private methods.
00017 */
00018 #ifndef MAGICKCORE_RANDOM_PRIVATE_H
00019 #define MAGICKCORE_RANDOM_PRIVATE_H
00020 
00021 #include "magick/thread-private.h"
00022 
00023 #if defined(__cplusplus) || defined(c_plusplus)
00024 extern "C" {
00025 #endif
00026 
00027 static inline RandomInfo **DestroyRandomInfoThreadSet(
00028   RandomInfo **random_info)
00029 {
00030   register ssize_t
00031     i;
00032 
00033   assert(random_info != (RandomInfo **) NULL);
00034   for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
00035     if (random_info[i] != (RandomInfo *) NULL)
00036       random_info[i]=DestroyRandomInfo(random_info[i]);
00037   return((RandomInfo **) RelinquishAlignedMemory(random_info));
00038 }
00039 
00040 static inline RandomInfo **AcquireRandomInfoThreadSet(void)
00041 {
00042   register ssize_t
00043     i;
00044 
00045   RandomInfo
00046     **random_info;
00047 
00048   size_t
00049     number_threads;
00050 
00051   number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
00052   random_info=(RandomInfo **) AcquireAlignedMemory(number_threads,
00053     sizeof(*random_info));
00054   if (random_info == (RandomInfo **) NULL)
00055     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
00056   (void) memset(random_info,0,number_threads*sizeof(*random_info));
00057   for (i=0; i < (ssize_t) number_threads; i++)
00058     random_info[i]=AcquireRandomInfo();
00059   return(random_info);
00060 }
00061 
00062 extern MagickExport unsigned long
00063   *GetRandomInfoSeed(RandomInfo *);
00064 
00065 extern MagickExport double
00066    GetRandomInfoNormalize(const RandomInfo *);
00067 
00068 #if defined(__cplusplus) || defined(c_plusplus)
00069 }
00070 #endif
00071 
00072 #endif

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