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 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/resource_.h"
23 #include "MagickCore/thread_.h"
24
25 #if defined(__cplusplus) || defined(c_plusplus)
26 extern "C" {
27 #endif
28
29 /*
30 Single threaded unless workload justifies the threading overhead.
31 */
32 #define magick_threads(source,destination,chunk,expression) \
33 num_threads((expression) == 0 ? 1 : \
34 ((chunk) > (32*GetMagickResourceLimit(ThreadResource))) && \
35 ((GetImagePixelCacheType(source) == MemoryCache) || \
36 (GetImagePixelCacheType(source) == MapCache)) && \
37 ((GetImagePixelCacheType(destination) == MemoryCache) || \
38 (GetImagePixelCacheType(destination) == MapCache)) ? \
39 GetMagickResourceLimit(ThreadResource) : \
40 GetMagickResourceLimit(ThreadResource) < 2 ? 1 : 2)
41
42 #if defined(__clang__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 10))
43 #define MagickCachePrefetch(address,mode,locality) \
44 __builtin_prefetch(address,mode,locality)
45 #else
46 #define MagickCachePrefetch(address,mode,locality) \
47 magick_unreferenced(address); \
48 magick_unreferenced(mode); \
49 magick_unreferenced(locality);
50 #endif
51
52 #if defined(MAGICKCORE_THREAD_SUPPORT)
53 typedef pthread_mutex_t MagickMutexType;
54 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
55 typedef CRITICAL_SECTION MagickMutexType;
56 #else
57 typedef size_t MagickMutexType;
58 #endif
59
GetMagickThreadId(void)60 static inline MagickThreadType GetMagickThreadId(void)
61 {
62 #if defined(MAGICKCORE_THREAD_SUPPORT)
63 return(pthread_self());
64 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
65 return(GetCurrentThreadId());
66 #else
67 return(getpid());
68 #endif
69 }
70
GetMagickThreadSignature(void)71 static inline size_t GetMagickThreadSignature(void)
72 {
73 #if defined(MAGICKCORE_THREAD_SUPPORT)
74 {
75 union
76 {
77 pthread_t
78 id;
79
80 size_t
81 signature;
82 } magick_thread;
83
84 magick_thread.signature=0UL;
85 magick_thread.id=pthread_self();
86 return(magick_thread.signature);
87 }
88 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
89 return((size_t) GetCurrentThreadId());
90 #else
91 return((size_t) getpid());
92 #endif
93 }
94
IsMagickThreadEqual(const MagickThreadType id)95 static inline MagickBooleanType IsMagickThreadEqual(const MagickThreadType id)
96 {
97 #if defined(MAGICKCORE_THREAD_SUPPORT)
98 if (pthread_equal(id,pthread_self()) != 0)
99 return(MagickTrue);
100 #elif defined(MAGICKCORE_WINDOWS_SUPPORT)
101 if (id == GetCurrentThreadId())
102 return(MagickTrue);
103 #else
104 if (id == getpid())
105 return(MagickTrue);
106 #endif
107 return(MagickFalse);
108 }
109
110 /*
111 Lightweight OpenMP methods.
112 */
GetOpenMPMaximumThreads(void)113 static inline size_t GetOpenMPMaximumThreads(void)
114 {
115 #if defined(MAGICKCORE_OPENMP_SUPPORT)
116 return(omp_get_max_threads());
117 #else
118 return(1);
119 #endif
120 }
121
GetOpenMPThreadId(void)122 static inline int GetOpenMPThreadId(void)
123 {
124 #if defined(MAGICKCORE_OPENMP_SUPPORT)
125 return(omp_get_thread_num());
126 #else
127 return(0);
128 #endif
129 }
130
SetOpenMPMaximumThreads(const int threads)131 static inline void SetOpenMPMaximumThreads(const int threads)
132 {
133 #if defined(MAGICKCORE_OPENMP_SUPPORT)
134 omp_set_num_threads(threads);
135 #else
136 (void) threads;
137 #endif
138 }
139
SetOpenMPNested(const int value)140 static inline void SetOpenMPNested(const int value)
141 {
142 #if defined(MAGICKCORE_OPENMP_SUPPORT)
143 omp_set_nested(value);
144 #else
145 (void) value;
146 #endif
147 }
148
149 #if defined(__cplusplus) || defined(c_plusplus)
150 }
151 #endif
152
153 #endif
154