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163 lines
4.1 KiB
163 lines
4.1 KiB
/*
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Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization
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dedicated to making software imaging solutions freely available.
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You may not use this file except in compliance with the License. You may
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obtain a copy of the License at
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https://imagemagick.org/script/license.php
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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MagickCore private methods for internal threading.
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*/
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#ifndef MAGICKCORE_THREAD_PRIVATE_H
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#define MAGICKCORE_THREAD_PRIVATE_H
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#include "MagickCore/cache.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/resource_.h"
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#include "MagickCore/thread_.h"
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#define magick_number_threads(source,destination,chunk,multithreaded) \
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num_threads(GetMagickNumberThreads(source,destination,chunk,multithreaded))
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#if defined(__clang__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 10))
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#define MagickCachePrefetch(address,mode,locality) \
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__builtin_prefetch(address,mode,locality)
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#else
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#define MagickCachePrefetch(address,mode,locality) \
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magick_unreferenced(address); \
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magick_unreferenced(mode); \
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magick_unreferenced(locality);
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#endif
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#if defined(MAGICKCORE_THREAD_SUPPORT)
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typedef pthread_mutex_t MagickMutexType;
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#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
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typedef CRITICAL_SECTION MagickMutexType;
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#else
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typedef size_t MagickMutexType;
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#endif
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static inline int GetMagickNumberThreads(const Image *source,
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const Image *destination,const size_t chunk,int multithreaded)
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{
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/*
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Number of threads bounded by the amount of work and any thread resource
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limit. The limit is 2 if the pixel cache type is not memory or
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memory-mapped.
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*/
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if (multithreaded == 0)
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return(1);
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if (((GetImagePixelCacheType(source) != MemoryCache) &&
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(GetImagePixelCacheType(source) != MapCache)) ||
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((GetImagePixelCacheType(destination) != MemoryCache) &&
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(GetImagePixelCacheType(destination) != MapCache)))
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return((int) MagickMax(MagickMin(GetMagickResourceLimit(ThreadResource),2),1));
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return((int) MagickMax(MagickMin((ssize_t) GetMagickResourceLimit(
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ThreadResource),(ssize_t) (chunk)/64),1));
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}
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static inline MagickThreadType GetMagickThreadId(void)
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{
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#if defined(MAGICKCORE_THREAD_SUPPORT)
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return(pthread_self());
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#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
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return(GetCurrentThreadId());
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#else
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return(getpid());
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#endif
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}
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static inline size_t GetMagickThreadSignature(void)
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{
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#if defined(MAGICKCORE_THREAD_SUPPORT)
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{
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union
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{
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pthread_t
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id;
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size_t
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signature;
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} magick_thread;
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magick_thread.signature=0UL;
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magick_thread.id=pthread_self();
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return(magick_thread.signature);
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}
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#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
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return((size_t) GetCurrentThreadId());
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#else
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return((size_t) getpid());
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#endif
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}
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static inline MagickBooleanType IsMagickThreadEqual(const MagickThreadType id)
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{
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#if defined(MAGICKCORE_THREAD_SUPPORT)
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if (pthread_equal(id,pthread_self()) != 0)
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return(MagickTrue);
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#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
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if (id == GetCurrentThreadId())
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return(MagickTrue);
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#else
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if (id == getpid())
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return(MagickTrue);
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#endif
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return(MagickFalse);
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}
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/*
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Lightweight OpenMP methods.
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*/
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static inline size_t GetOpenMPMaximumThreads(void)
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{
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#if defined(MAGICKCORE_OPENMP_SUPPORT)
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return(omp_get_max_threads());
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#else
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return(1);
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#endif
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}
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static inline int GetOpenMPThreadId(void)
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{
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#if defined(MAGICKCORE_OPENMP_SUPPORT)
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return(omp_get_thread_num());
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#else
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return(0);
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#endif
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}
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static inline void SetOpenMPMaximumThreads(const int threads)
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{
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#if defined(MAGICKCORE_OPENMP_SUPPORT)
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omp_set_num_threads(threads);
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#else
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(void) threads;
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#endif
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}
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static inline void SetOpenMPNested(const int value)
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{
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#if defined(MAGICKCORE_OPENMP_SUPPORT)
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omp_set_nested(value);
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#else
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(void) value;
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#endif
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}
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif
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