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1 /*
2   Copyright 1999-2016 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.
6   obtain a copy of the License at
7 
8     http://www.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 random generation private methods.
17 */
18 #ifndef MAGICKCORE_RANDOM_PRIVATE_H
19 #define MAGICKCORE_RANDOM_PRIVATE_H
20 
21 #include "MagickCore/thread-private.h"
22 
23 #if defined(__cplusplus) || defined(c_plusplus)
24 extern "C" {
25 #endif
26 
27 extern MagickPrivate double
28   GetRandomInfoNormalize(const RandomInfo *);
29 
30 extern MagickPrivate MagickBooleanType
31   RandomComponentGenesis(void);
32 
33 extern MagickPrivate unsigned long
34   *GetRandomInfoSeed(RandomInfo *);
35 
36 extern MagickPrivate void
37   RandomComponentTerminus(void);
38 
DestroyRandomInfoThreadSet(RandomInfo ** random_info)39 static inline RandomInfo **DestroyRandomInfoThreadSet(
40   RandomInfo **random_info)
41 {
42   register ssize_t
43     i;
44 
45   assert(random_info != (RandomInfo **) NULL);
46   for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
47     if (random_info[i] != (RandomInfo *) NULL)
48       random_info[i]=DestroyRandomInfo(random_info[i]);
49   return((RandomInfo **) RelinquishMagickMemory(random_info));
50 }
51 
AcquireRandomInfoThreadSet(void)52 static inline RandomInfo **AcquireRandomInfoThreadSet(void)
53 {
54   register ssize_t
55     i;
56 
57   RandomInfo
58     **random_info;
59 
60   size_t
61     number_threads;
62 
63   number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
64   random_info=(RandomInfo **) AcquireQuantumMemory(number_threads,
65     sizeof(*random_info));
66   if (random_info == (RandomInfo **) NULL)
67     return((RandomInfo **) NULL);
68   (void) ResetMagickMemory(random_info,0,number_threads*sizeof(*random_info));
69   for (i=0; i < (ssize_t) number_threads; i++)
70   {
71     random_info[i]=AcquireRandomInfo();
72     if (random_info[i] == (RandomInfo *) NULL)
73       return(DestroyRandomInfoThreadSet(random_info));
74   }
75   return(random_info);
76 }
77 
78 #if defined(__cplusplus) || defined(c_plusplus)
79 }
80 #endif
81 
82 #endif
83