MagickCore 7.1.1
Convert, Edit, Or Compose Bitmap Images
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thread-private.h
1/*
2 Copyright @ 1999 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 methods for internal threading.
17*/
18#ifndef MAGICKCORE_THREAD_PRIVATE_H
19#define MAGICKCORE_THREAD_PRIVATE_H
20
21#include "MagickCore/cache.h"
22#include "MagickCore/image-private.h"
23#include "MagickCore/resource_.h"
24#include "MagickCore/thread_.h"
25
26#if defined(__cplusplus) || defined(c_plusplus)
27extern "C" {
28#endif
29
30#define magick_number_threads(source,destination,chunk,factor) \
31 num_threads(GetMagickNumberThreads((source),(destination),(chunk),(factor)))
32#if defined(__clang__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 10))
33#define MagickCachePrefetch(address,mode,locality) \
34 __builtin_prefetch(address,mode,locality)
35#else
36#define MagickCachePrefetch(address,mode,locality) \
37 magick_unreferenced(address); \
38 magick_unreferenced(mode); \
39 magick_unreferenced(locality);
40#endif
41
42#if defined(MAGICKCORE_THREAD_SUPPORT)
43 typedef pthread_mutex_t MagickMutexType;
44#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
45 typedef CRITICAL_SECTION MagickMutexType;
46#else
47 typedef size_t MagickMutexType;
48#endif
49
50static inline int GetMagickNumberThreads(const Image *source,
51 const Image *destination,const size_t chunk,const int factor)
52{
53#define WorkLoadFactor (64UL << factor)
54
55 const CacheType
56 destination_type = (CacheType) GetImagePixelCacheType(destination),
57 source_type = (CacheType) GetImagePixelCacheType(source);
58
59 int
60 number_threads;
61
62 /*
63 Return number of threads dependent on cache type and work load.
64 */
65 number_threads=(int) MagickMax(MagickMin(chunk/WorkLoadFactor,
66 GetMagickResourceLimit(ThreadResource)),1);
67 if (((source_type != MemoryCache) && (source_type != MapCache)) ||
68 ((destination_type != MemoryCache) && (destination_type != MapCache)))
69 number_threads=MagickMin(number_threads,2);
70 return(number_threads);
71}
72
73static inline MagickThreadType GetMagickThreadId(void)
74{
75#if defined(MAGICKCORE_THREAD_SUPPORT)
76 return(pthread_self());
77#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
78 return(GetCurrentThreadId());
79#else
80 return(getpid());
81#endif
82}
83
84static inline size_t GetMagickThreadSignature(void)
85{
86#if defined(MAGICKCORE_THREAD_SUPPORT)
87 {
88 union
89 {
90 pthread_t
91 id;
92
93 size_t
94 signature;
95 } magick_thread;
96
97 magick_thread.signature=0UL;
98 magick_thread.id=pthread_self();
99 return(magick_thread.signature);
100 }
101#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
102 return((size_t) GetCurrentThreadId());
103#else
104 return((size_t) getpid());
105#endif
106}
107
108static inline MagickBooleanType IsMagickThreadEqual(const MagickThreadType id)
109{
110#if defined(MAGICKCORE_THREAD_SUPPORT)
111 if (pthread_equal(id,pthread_self()) != 0)
112 return(MagickTrue);
113#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
114 if (id == GetCurrentThreadId())
115 return(MagickTrue);
116#else
117 if (id == getpid())
118 return(MagickTrue);
119#endif
120 return(MagickFalse);
121}
122
123/*
124 Lightweight OpenMP methods.
125*/
126static inline size_t GetOpenMPMaximumThreads(void)
127{
128#if defined(MAGICKCORE_OPENMP_SUPPORT)
129 return((size_t) omp_get_max_threads());
130#else
131 return(1);
132#endif
133}
134
135static inline int GetOpenMPThreadId(void)
136{
137#if defined(MAGICKCORE_OPENMP_SUPPORT)
138 return(omp_get_thread_num());
139#else
140 return(0);
141#endif
142}
143
144#if defined(MAGICKCORE_OPENMP_SUPPORT)
145static inline void SetOpenMPMaximumThreads(const int threads)
146{
147 omp_set_num_threads(threads);
148#else
149static inline void SetOpenMPMaximumThreads(const int magick_unused(threads))
150{
151 magick_unreferenced(threads);
152#endif
153}
154
155#if defined(MAGICKCORE_OPENMP_SUPPORT)
156static inline void SetOpenMPNested(const int value)
157{
158 omp_set_nested(value);
159#else
160static inline void SetOpenMPNested(const int magick_unused(value))
161{
162 magick_unreferenced(value);
163#endif
164}
165
166#if defined(__cplusplus) || defined(c_plusplus)
167}
168#endif
169
170#endif