MagickCore 6.9.11-60
Convert, Edit, Or Compose Bitmap Images
thread-private.h
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1/*
2 Copyright 1999-2021 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 "magick/cache.h"
23#include "magick/resource_.h"
24#include "magick/thread_.h"
25
26#if defined(__cplusplus) || defined(c_plusplus)
27extern "C" {
28#endif
29
30/*
31 Number of threads bounded by the amount of work and any thread resource limit.
32 The limit is 2 if the pixel cache type is not memory or memory-mapped.
33*/
34#define magick_number_threads(source,destination,chunk,multithreaded) \
35 num_threads((multithreaded) == 0 ? 1 : \
36 ((GetImagePixelCacheType(source) != MemoryCache) && \
37 (GetImagePixelCacheType(source) != MapCache)) || \
38 ((GetImagePixelCacheType(destination) != MemoryCache) && \
39 (GetImagePixelCacheType(destination) != MapCache)) ? \
40 MagickMax(MagickMin(GetMagickResourceLimit(ThreadResource),2),1) : \
41 MagickMax(MagickMin((ssize_t) GetMagickResourceLimit(ThreadResource),(ssize_t) (chunk)/64),1))
42
43#if defined(__clang__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 10))
44#define MagickCachePrefetch(address,mode,locality) \
45 __builtin_prefetch(address,mode,locality)
46#else
47#define MagickCachePrefetch(address,mode,locality)
48#endif
49
50#if defined(MAGICKCORE_THREAD_SUPPORT)
51 typedef pthread_mutex_t MagickMutexType;
52#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
53 typedef CRITICAL_SECTION MagickMutexType;
54#else
55 typedef size_t MagickMutexType;
56#endif
57
59{
60#if defined(MAGICKCORE_THREAD_SUPPORT)
61 return(pthread_self());
62#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
63 return(GetCurrentThreadId());
64#else
65 return(getpid());
66#endif
67}
68
69static inline size_t GetMagickThreadSignature(void)
70{
71#if defined(MAGICKCORE_THREAD_SUPPORT)
72 {
73 union
74 {
75 pthread_t
76 id;
77
78 size_t
79 signature;
80 } magick_thread;
81
82 magick_thread.signature=0UL;
83 magick_thread.id=pthread_self();
84 return(magick_thread.signature);
85 }
86#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
87 return((size_t) GetCurrentThreadId());
88#else
89 return((size_t) getpid());
90#endif
91}
92
94{
95#if defined(MAGICKCORE_THREAD_SUPPORT)
96 if (pthread_equal(id,pthread_self()) != 0)
97 return(MagickTrue);
98#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
99 if (id == GetCurrentThreadId())
100 return(MagickTrue);
101#else
102 if (id == getpid())
103 return(MagickTrue);
104#endif
105 return(MagickFalse);
106}
107
108/*
109 Lightweight OpenMP methods.
110*/
111static inline size_t GetOpenMPMaximumThreads(void)
112{
113#if defined(MAGICKCORE_OPENMP_SUPPORT)
114 return(omp_get_max_threads());
115#else
116 return(1);
117#endif
118}
119
120static inline int GetOpenMPThreadId(void)
121{
122#if defined(MAGICKCORE_OPENMP_SUPPORT)
123 return(omp_get_thread_num());
124#else
125 return(0);
126#endif
127}
128
129static inline void SetOpenMPMaximumThreads(const int threads)
130{
131#if defined(MAGICKCORE_OPENMP_SUPPORT)
132 omp_set_num_threads(threads);
133#else
134 (void) threads;
135#endif
136}
137
138static inline void SetOpenMPNested(const int value)
139{
140#if defined(MAGICKCORE_OPENMP_SUPPORT)
141 omp_set_nested(value);
142#else
143 (void) value;
144#endif
145}
146
147#if defined(__cplusplus) || defined(c_plusplus)
148}
149#endif
150
151#endif
MagickBooleanType
Definition: magick-type.h:203
@ MagickFalse
Definition: magick-type.h:204
@ MagickTrue
Definition: magick-type.h:205
static void SetOpenMPNested(const int value)
Definition: thread-private.h:138
static int GetOpenMPThreadId(void)
Definition: thread-private.h:120
static MagickBooleanType IsMagickThreadEqual(const MagickThreadType id)
Definition: thread-private.h:93
static MagickThreadType GetMagickThreadId(void)
Definition: thread-private.h:58
static size_t GetOpenMPMaximumThreads(void)
Definition: thread-private.h:111
size_t MagickMutexType
Definition: thread-private.h:55
static void SetOpenMPMaximumThreads(const int threads)
Definition: thread-private.h:129
static size_t GetMagickThreadSignature(void)
Definition: thread-private.h:69
pid_t MagickThreadType
Definition: thread_.h:34
#define pthread_self
Definition: vms.h:836
#define pthread_equal
Definition: vms.h:802