147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*
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Copyright 1999-2013 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.
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obtain a copy of the License at
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http://www.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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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#include "magick/cache.h"
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#include "magick/resource_.h"
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#include "magick/thread_.h"
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/*
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Single threaded unless workload justifies the threading overhead.
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*/
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#define magick_threads(source,destination,chunk,expression) \
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num_threads((expression) == 0 ? 1 : \
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(((chunk) > (16*GetMagickResourceLimit(ThreadResource))) && \
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(GetImagePixelCacheType(source) != DiskCache)) && \
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(GetImagePixelCacheType(destination) != DiskCache) ? \
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GetMagickResourceLimit(ThreadResource) : \
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GetMagickResourceLimit(ThreadResource) < 2 ? 1 : 2)
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#if (__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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#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 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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#endif
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return(1);
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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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