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/*
Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization
dedicated to making software imaging solutions freely available.
You may not use this file except in compliance with the License.
obtain a copy of the License at
http://www.imagemagick.org/script/license.php
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
MagickCore private methods for internal threading.
*/
#ifndef _MAGICKCORE_THREAD_PRIVATE_H
#define _MAGICKCORE_THREAD_PRIVATE_H
#include "magick/cache.h"
#include "magick/resource_.h"
#include "magick/thread_.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/*
Single threaded unless workload justifies the threading overhead.
*/
#define magick_threads(source,destination,chunk,expression) \
num_threads((expression) == 0 ? 1 : \
(((chunk) > (32*GetMagickResourceLimit(ThreadResource))) && \
(GetImagePixelCacheType(source) != DiskCache)) && \
(GetImagePixelCacheType(destination) != DiskCache) ? \
GetMagickResourceLimit(ThreadResource) : \
GetMagickResourceLimit(ThreadResource) < 2 ? 1 : 2)
#if defined(__clang__) || (__GNUC__ > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ > 10))
#define MagickCachePrefetch(address,mode,locality) \
__builtin_prefetch(address,mode,locality)
#else
#define MagickCachePrefetch(address,mode,locality)
#endif
#if defined(MAGICKCORE_THREAD_SUPPORT)
typedef pthread_mutex_t MagickMutexType;
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
typedef CRITICAL_SECTION MagickMutexType;
#else
typedef size_t MagickMutexType;
#endif
static inline MagickThreadType GetMagickThreadId(void)
{
#if defined(MAGICKCORE_THREAD_SUPPORT)
return(pthread_self());
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
return(GetCurrentThreadId());
#else
return(getpid());
#endif
}
static inline size_t GetMagickThreadSignature(void)
{
#if defined(MAGICKCORE_THREAD_SUPPORT)
{
union
{
pthread_t
id;
size_t
signature;
} magick_thread;
magick_thread.signature=0UL;
magick_thread.id=pthread_self();
return(magick_thread.signature);
}
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
return((size_t) GetCurrentThreadId());
#else
return((size_t) getpid());
#endif
}
static inline MagickBooleanType IsMagickThreadEqual(const MagickThreadType id)
{
#if defined(MAGICKCORE_THREAD_SUPPORT)
if (pthread_equal(id,pthread_self()) != 0)
return(MagickTrue);
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
if (id == GetCurrentThreadId())
return(MagickTrue);
#else
if (id == getpid())
return(MagickTrue);
#endif
return(MagickFalse);
}
/*
Lightweight OpenMP methods.
*/
static inline size_t GetOpenMPMaximumThreads(void)
{
#if defined(MAGICKCORE_OPENMP_SUPPORT)
return(omp_get_max_threads());
#else
return(1);
#endif
}
static inline int GetOpenMPThreadId(void)
{
#if defined(MAGICKCORE_OPENMP_SUPPORT)
return(omp_get_thread_num());
#else
return(0);
#endif
}
static inline void SetOpenMPMaximumThreads(const int threads)
{
#if defined(MAGICKCORE_OPENMP_SUPPORT)
omp_set_num_threads(threads);
#else
(void) threads;
#endif
}
static inline void SetOpenMPNested(const int value)
{
#if defined(MAGICKCORE_OPENMP_SUPPORT)
omp_set_nested(value);
#else
(void) value;
#endif
}
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif
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