Home | History | Annotate | Download | only in MagickCore 
      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 
     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 
     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 
     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 */
    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 
    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 
    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 
    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