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| <h1>parallel_for.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
| <a name="l00002"></a>00002 <span class="comment"> Copyright 2005-2010 Intel Corporation. All Rights Reserved.</span> |
| <a name="l00003"></a>00003 <span class="comment"></span> |
| <a name="l00004"></a>00004 <span class="comment"> The source code contained or described herein and all documents related</span> |
| <a name="l00005"></a>00005 <span class="comment"> to the source code ("Material") are owned by Intel Corporation or its</span> |
| <a name="l00006"></a>00006 <span class="comment"> suppliers or licensors. Title to the Material remains with Intel</span> |
| <a name="l00007"></a>00007 <span class="comment"> Corporation or its suppliers and licensors. The Material is protected</span> |
| <a name="l00008"></a>00008 <span class="comment"> by worldwide copyright laws and treaty provisions. No part of the</span> |
| <a name="l00009"></a>00009 <span class="comment"> Material may be used, copied, reproduced, modified, published, uploaded,</span> |
| <a name="l00010"></a>00010 <span class="comment"> posted, transmitted, distributed, or disclosed in any way without</span> |
| <a name="l00011"></a>00011 <span class="comment"> Intel's prior express written permission.</span> |
| <a name="l00012"></a>00012 <span class="comment"></span> |
| <a name="l00013"></a>00013 <span class="comment"> No license under any patent, copyright, trade secret or other</span> |
| <a name="l00014"></a>00014 <span class="comment"> intellectual property right is granted to or conferred upon you by</span> |
| <a name="l00015"></a>00015 <span class="comment"> disclosure or delivery of the Materials, either expressly, by</span> |
| <a name="l00016"></a>00016 <span class="comment"> implication, inducement, estoppel or otherwise. Any license under such</span> |
| <a name="l00017"></a>00017 <span class="comment"> intellectual property rights must be express and approved by Intel in</span> |
| <a name="l00018"></a>00018 <span class="comment"> writing.</span> |
| <a name="l00019"></a>00019 <span class="comment">*/</span> |
| <a name="l00020"></a>00020 |
| <a name="l00021"></a>00021 <span class="preprocessor">#ifndef __TBB_parallel_for_H</span> |
| <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __TBB_parallel_for_H</span> |
| <a name="l00023"></a>00023 <span class="preprocessor"></span> |
| <a name="l00024"></a>00024 <span class="preprocessor">#include "task.h"</span> |
| <a name="l00025"></a>00025 <span class="preprocessor">#include "partitioner.h"</span> |
| <a name="l00026"></a>00026 <span class="preprocessor">#include "blocked_range.h"</span> |
| <a name="l00027"></a>00027 <span class="preprocessor">#include <new></span> |
| <a name="l00028"></a>00028 <span class="preprocessor">#include "tbb_exception.h"</span> |
| <a name="l00029"></a>00029 |
| <a name="l00030"></a>00030 <span class="keyword">namespace </span>tbb { |
| <a name="l00031"></a>00031 |
| <a name="l00033"></a>00033 <span class="keyword">namespace </span>internal { |
| <a name="l00034"></a>00034 |
| <a name="l00036"></a>00036 |
| <a name="l00037"></a>00037 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> |
| <a name="l00038"></a>00038 <span class="keyword">class </span>start_for: <span class="keyword">public</span> task { |
| <a name="l00039"></a>00039 Range my_range; |
| <a name="l00040"></a>00040 <span class="keyword">const</span> Body my_body; |
| <a name="l00041"></a>00041 <span class="keyword">typename</span> Partitioner::partition_type my_partition; |
| <a name="l00042"></a>00042 <span class="comment">/*override*/</span> task* execute(); |
| <a name="l00043"></a>00043 |
| <a name="l00045"></a>00045 start_for( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, Partitioner& partitioner ) : |
| <a name="l00046"></a>00046 my_range(range), |
| <a name="l00047"></a>00047 my_body(body), |
| <a name="l00048"></a>00048 my_partition(partitioner) |
| <a name="l00049"></a>00049 { |
| <a name="l00050"></a>00050 } |
| <a name="l00052"></a>00052 |
| <a name="l00053"></a>00053 start_for( start_for& parent_, split ) : |
| <a name="l00054"></a>00054 my_range(parent_.my_range,split()), |
| <a name="l00055"></a>00055 my_body(parent_.my_body), |
| <a name="l00056"></a>00056 my_partition(parent_.my_partition,split()) |
| <a name="l00057"></a>00057 { |
| <a name="l00058"></a>00058 my_partition.set_affinity(*<span class="keyword">this</span>); |
| <a name="l00059"></a>00059 } |
| <a name="l00061"></a>00061 <span class="comment">/*override*/</span> <span class="keywordtype">void</span> note_affinity( affinity_id <span class="keywordtype">id</span> ) { |
| <a name="l00062"></a>00062 my_partition.note_affinity( <span class="keywordtype">id</span> ); |
| <a name="l00063"></a>00063 } |
| <a name="l00064"></a>00064 <span class="keyword">public</span>: |
| <a name="l00065"></a>00065 <span class="keyword">static</span> <span class="keywordtype">void</span> run( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> Partitioner& partitioner ) { |
| <a name="l00066"></a>00066 <span class="keywordflow">if</span>( !range.empty() ) { |
| <a name="l00067"></a>00067 #<span class="keywordflow">if</span> !__TBB_TASK_GROUP_CONTEXT || TBB_JOIN_OUTER_TASK_GROUP |
| <a name="l00068"></a>00068 start_for& a = *<span class="keyword">new</span>(<a class="code" href="a00199.html#23acb0da0afd690da797f9f882027d34">task::allocate_root</a>()) start_for(range,body,const_cast<Partitioner&>(partitioner)); |
| <a name="l00069"></a>00069 <span class="preprocessor">#else</span> |
| <a name="l00070"></a>00070 <span class="preprocessor"></span> <span class="comment">// Bound context prevents exceptions from body to affect nesting or sibling algorithms,</span> |
| <a name="l00071"></a>00071 <span class="comment">// and allows users to handle exceptions safely by wrapping parallel_for in the try-block.</span> |
| <a name="l00072"></a>00072 task_group_context context; |
| <a name="l00073"></a>00073 start_for& a = *<span class="keyword">new</span>(task::allocate_root(context)) start_for(range,body,const_cast<Partitioner&>(partitioner)); |
| <a name="l00074"></a>00074 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_TASK_GROUP_CONTEXT && !TBB_JOIN_OUTER_TASK_GROUP */</span> |
| <a name="l00075"></a>00075 <a class="code" href="a00199.html#ce8ce689c26a4ddf343829bc3c73290a">task::spawn_root_and_wait</a>(a); |
| <a name="l00076"></a>00076 } |
| <a name="l00077"></a>00077 } |
| <a name="l00078"></a>00078 <span class="preprocessor">#if __TBB_TASK_GROUP_CONTEXT</span> |
| <a name="l00079"></a>00079 <span class="preprocessor"></span> <span class="keyword">static</span> <span class="keywordtype">void</span> run( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> Partitioner& partitioner, task_group_context& context ) { |
| <a name="l00080"></a>00080 <span class="keywordflow">if</span>( !range.empty() ) { |
| <a name="l00081"></a>00081 start_for& a = *<span class="keyword">new</span>(task::allocate_root(context)) start_for(range,body,const_cast<Partitioner&>(partitioner)); |
| <a name="l00082"></a>00082 <a class="code" href="a00199.html#ce8ce689c26a4ddf343829bc3c73290a">task::spawn_root_and_wait</a>(a); |
| <a name="l00083"></a>00083 } |
| <a name="l00084"></a>00084 } |
| <a name="l00085"></a>00085 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_TASK_GROUP_CONTEXT */</span> |
| <a name="l00086"></a>00086 }; |
| <a name="l00087"></a>00087 |
| <a name="l00088"></a>00088 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> Partitioner> |
| <a name="l00089"></a>00089 task* start_for<Range,Body,Partitioner>::execute() { |
| <a name="l00090"></a>00090 <span class="keywordflow">if</span>( !my_range.is_divisible() || my_partition.should_execute_range(*<span class="keyword">this</span>) ) { |
| <a name="l00091"></a>00091 my_body( my_range ); |
| <a name="l00092"></a>00092 <span class="keywordflow">return</span> my_partition.continue_after_execute_range(); |
| <a name="l00093"></a>00093 } <span class="keywordflow">else</span> { |
| <a name="l00094"></a>00094 empty_task& c = *<span class="keyword">new</span>( this->allocate_continuation() ) empty_task; |
| <a name="l00095"></a>00095 recycle_as_child_of(c); |
| <a name="l00096"></a>00096 c.set_ref_count(2); |
| <a name="l00097"></a>00097 <span class="keywordtype">bool</span> delay = my_partition.decide_whether_to_delay(); |
| <a name="l00098"></a>00098 start_for& b = *<span class="keyword">new</span>( c.allocate_child() ) start_for(*<span class="keyword">this</span>,split()); |
| <a name="l00099"></a>00099 my_partition.spawn_or_delay(delay,b); |
| <a name="l00100"></a>00100 <span class="keywordflow">return</span> <span class="keyword">this</span>; |
| <a name="l00101"></a>00101 } |
| <a name="l00102"></a>00102 } |
| <a name="l00103"></a>00103 } <span class="comment">// namespace internal</span> |
| <a name="l00105"></a>00105 <span class="comment"></span> |
| <a name="l00106"></a>00106 |
| <a name="l00107"></a>00107 <span class="comment">// Requirements on Range concept are documented in blocked_range.h</span> |
| <a name="l00108"></a>00108 |
| <a name="l00119"></a>00119 |
| <a name="l00121"></a>00121 |
| <a name="l00122"></a>00122 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00123"></a><a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">00123</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body ) { |
| <a name="l00124"></a>00124 internal::start_for<Range,Body,__TBB_DEFAULT_PARTITIONER>::run(range,body,__TBB_DEFAULT_PARTITIONER()); |
| <a name="l00125"></a>00125 } |
| <a name="l00126"></a>00126 |
| <a name="l00128"></a>00128 |
| <a name="l00129"></a>00129 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00130"></a><a class="code" href="a00274.html#g13cac5dd55c7533bccea43a51c33d0e5">00130</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> <a class="code" href="a00193.html">simple_partitioner</a>& partitioner ) { |
| <a name="l00131"></a>00131 internal::start_for<Range,Body,simple_partitioner>::run(range,body,partitioner); |
| <a name="l00132"></a>00132 } |
| <a name="l00133"></a>00133 |
| <a name="l00135"></a>00135 |
| <a name="l00136"></a>00136 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00137"></a><a class="code" href="a00274.html#ga7ac75d532389b55b9247f3fdb0b00d1">00137</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> <a class="code" href="a00146.html">auto_partitioner</a>& partitioner ) { |
| <a name="l00138"></a>00138 internal::start_for<Range,Body,auto_partitioner>::run(range,body,partitioner); |
| <a name="l00139"></a>00139 } |
| <a name="l00140"></a>00140 |
| <a name="l00142"></a>00142 |
| <a name="l00143"></a>00143 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00144"></a><a class="code" href="a00274.html#g9cd1b210ceb1c040f30e390b4a21bde8">00144</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <a class="code" href="a00141.html">affinity_partitioner</a>& partitioner ) { |
| <a name="l00145"></a>00145 internal::start_for<Range,Body,affinity_partitioner>::run(range,body,partitioner); |
| <a name="l00146"></a>00146 } |
| <a name="l00147"></a>00147 |
| <a name="l00148"></a>00148 <span class="preprocessor">#if __TBB_TASK_GROUP_CONTEXT</span> |
| <a name="l00150"></a>00150 <span class="preprocessor"></span> |
| <a name="l00151"></a>00151 <span class="preprocessor">template<typename Range, typename Body></span> |
| <a name="l00152"></a><a class="code" href="a00274.html#g2d317a5e0078cd193125439fed60dfdc">00152</a> <span class="preprocessor"></span><span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> <a class="code" href="a00193.html">simple_partitioner</a>& partitioner, <a class="code" href="a00201.html">task_group_context</a>& context ) { |
| <a name="l00153"></a>00153 internal::start_for<Range,Body,simple_partitioner>::run(range, body, partitioner, context); |
| <a name="l00154"></a>00154 } |
| <a name="l00155"></a>00155 |
| <a name="l00157"></a>00157 |
| <a name="l00158"></a>00158 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00159"></a><a class="code" href="a00274.html#g1c0700e3f85e83a788ff3ede88ebb7e9">00159</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <span class="keyword">const</span> <a class="code" href="a00146.html">auto_partitioner</a>& partitioner, <a class="code" href="a00201.html">task_group_context</a>& context ) { |
| <a name="l00160"></a>00160 internal::start_for<Range,Body,auto_partitioner>::run(range, body, partitioner, context); |
| <a name="l00161"></a>00161 } |
| <a name="l00162"></a>00162 |
| <a name="l00164"></a>00164 |
| <a name="l00165"></a>00165 <span class="keyword">template</span><<span class="keyword">typename</span> Range, <span class="keyword">typename</span> Body> |
| <a name="l00166"></a><a class="code" href="a00274.html#g04b4696b67370c01353ff5974c8f1196">00166</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>( <span class="keyword">const</span> Range& range, <span class="keyword">const</span> Body& body, <a class="code" href="a00141.html">affinity_partitioner</a>& partitioner, <a class="code" href="a00201.html">task_group_context</a>& context ) { |
| <a name="l00167"></a>00167 internal::start_for<Range,Body,affinity_partitioner>::run(range,body,partitioner, context); |
| <a name="l00168"></a>00168 } |
| <a name="l00169"></a>00169 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_TASK_GROUP_CONTEXT */</span> |
| <a name="l00170"></a>00170 |
| <a name="l00171"></a>00171 |
| <a name="l00173"></a>00173 <span class="keyword">namespace </span>internal { |
| <a name="l00175"></a>00175 <span class="keyword">template</span><<span class="keyword">typename</span> Function, <span class="keyword">typename</span> Index> |
| <a name="l00176"></a>00176 <span class="keyword">class </span>parallel_for_body : internal::no_assign { |
| <a name="l00177"></a>00177 <span class="keyword">const</span> Function &my_func; |
| <a name="l00178"></a>00178 <span class="keyword">const</span> Index my_begin; |
| <a name="l00179"></a>00179 <span class="keyword">const</span> Index my_step; |
| <a name="l00180"></a>00180 <span class="keyword">public</span>: |
| <a name="l00181"></a>00181 parallel_for_body( <span class="keyword">const</span> Function& _func, Index& _begin, Index& _step) |
| <a name="l00182"></a>00182 : my_func(_func), my_begin(_begin), my_step(_step) {} |
| <a name="l00183"></a>00183 |
| <a name="l00184"></a>00184 <span class="keywordtype">void</span> operator()( <a class="code" href="a00148.html">tbb::blocked_range<Index></a>& r )<span class="keyword"> const </span>{ |
| <a name="l00185"></a>00185 <span class="keywordflow">for</span>( Index i = r.<a class="code" href="a00148.html#18d2258400756ac1446dac7676b18df3">begin</a>(), k = my_begin + i * my_step; i < r.<a class="code" href="a00148.html#8b929d93ddc13f148b11bceef3a3bdf8">end</a>(); i++, k = k + my_step) |
| <a name="l00186"></a>00186 my_func( k ); |
| <a name="l00187"></a>00187 } |
| <a name="l00188"></a>00188 }; |
| <a name="l00189"></a>00189 } <span class="comment">// namespace internal</span> |
| <a name="l00191"></a>00191 <span class="comment"></span> |
| <a name="l00192"></a>00192 <span class="keyword">namespace </span>strict_ppl { |
| <a name="l00193"></a>00193 |
| <a name="l00195"></a>00195 |
| <a name="l00196"></a>00196 <span class="keyword">template</span> <<span class="keyword">typename</span> Index, <span class="keyword">typename</span> Function> |
| <a name="l00197"></a><a class="code" href="a00273.html#15c764c70c8a32e7a4b8c291d0cc8dde">00197</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(Index first, Index last, Index step, <span class="keyword">const</span> Function& f) { |
| <a name="l00198"></a>00198 <a class="code" href="a00201.html">tbb::task_group_context</a> context; |
| <a name="l00199"></a>00199 <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(first, last, step, f, context); |
| <a name="l00200"></a>00200 } |
| <a name="l00201"></a>00201 <span class="keyword">template</span> <<span class="keyword">typename</span> Index, <span class="keyword">typename</span> Function> |
| <a name="l00202"></a>00202 <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(Index first, Index last, Index step, <span class="keyword">const</span> Function& f, <a class="code" href="a00201.html">tbb::task_group_context</a> &context) { |
| <a name="l00203"></a>00203 <span class="keywordflow">if</span> (step <= 0 ) |
| <a name="l00204"></a>00204 internal::throw_exception(internal::eid_nonpositive_step); <span class="comment">// throws std::invalid_argument</span> |
| <a name="l00205"></a>00205 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (last > first) { |
| <a name="l00206"></a>00206 <span class="comment">// Above "else" is necessary to prevent "potential divide by zero" warning</span> |
| <a name="l00207"></a>00207 Index end = (last - first) / step; |
| <a name="l00208"></a>00208 <span class="keywordflow">if</span> (first + end * step < last) end++; |
| <a name="l00209"></a>00209 <a class="code" href="a00148.html">tbb::blocked_range<Index></a> range(static_cast<Index>(0), end); |
| <a name="l00210"></a>00210 internal::parallel_for_body<Function, Index> body(f, first, step); |
| <a name="l00211"></a>00211 <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">tbb::parallel_for</a>(range, body, <a class="code" href="a00146.html">tbb::auto_partitioner</a>(), context); |
| <a name="l00212"></a>00212 } |
| <a name="l00213"></a>00213 } |
| <a name="l00215"></a>00215 <span class="keyword">template</span> <<span class="keyword">typename</span> Index, <span class="keyword">typename</span> Function> |
| <a name="l00216"></a><a class="code" href="a00273.html#490399525b1e690ec31d6db964c6b272">00216</a> <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(Index first, Index last, <span class="keyword">const</span> Function& f) { |
| <a name="l00217"></a>00217 <a class="code" href="a00201.html">tbb::task_group_context</a> context; |
| <a name="l00218"></a>00218 <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(first, last, static_cast<Index>(1), f, context); |
| <a name="l00219"></a>00219 } |
| <a name="l00220"></a>00220 <span class="keyword">template</span> <<span class="keyword">typename</span> Index, <span class="keyword">typename</span> Function> |
| <a name="l00221"></a>00221 <span class="keywordtype">void</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(Index first, Index last, <span class="keyword">const</span> Function& f, <a class="code" href="a00201.html">tbb::task_group_context</a> &context) { |
| <a name="l00222"></a>00222 <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">parallel_for</a>(first, last, static_cast<Index>(1), f, context); |
| <a name="l00223"></a>00223 } |
| <a name="l00224"></a>00224 |
| <a name="l00226"></a>00226 |
| <a name="l00227"></a>00227 } <span class="comment">// namespace strict_ppl</span> |
| <a name="l00228"></a>00228 |
| <a name="l00229"></a>00229 <span class="keyword">using</span> <a class="code" href="a00274.html#g68cc046ef72c42ce205fccbc435a0d81">strict_ppl::parallel_for</a>; |
| <a name="l00230"></a>00230 |
| <a name="l00231"></a>00231 } <span class="comment">// namespace tbb</span> |
| <a name="l00232"></a>00232 |
| <a name="l00233"></a>00233 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_parallel_for_H */</span> |
| <a name="l00234"></a>00234 |
| </pre></div><hr> |
| <p></p> |
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