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| <h1>parallel_while.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_while</span> |
| <a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define __TBB_parallel_while</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 <new></span> |
| <a name="l00026"></a>00026 |
| <a name="l00027"></a>00027 <span class="keyword">namespace </span>tbb { |
| <a name="l00028"></a>00028 |
| <a name="l00029"></a>00029 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00030"></a>00030 <span class="keyword">class </span>parallel_while; |
| <a name="l00031"></a>00031 |
| <a name="l00033"></a>00033 <span class="keyword">namespace </span>internal { |
| <a name="l00034"></a>00034 |
| <a name="l00035"></a>00035 <span class="keyword">template</span><<span class="keyword">typename</span> Stream, <span class="keyword">typename</span> Body> <span class="keyword">class </span>while_task; |
| <a name="l00036"></a>00036 |
| <a name="l00038"></a>00038 |
| <a name="l00040"></a>00040 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00041"></a>00041 <span class="keyword">class </span>while_iteration_task: <span class="keyword">public</span> task { |
| <a name="l00042"></a>00042 <span class="keyword">const</span> Body& my_body; |
| <a name="l00043"></a>00043 <span class="keyword">typename</span> Body::argument_type my_value; |
| <a name="l00044"></a>00044 <span class="comment">/*override*/</span> task* execute() { |
| <a name="l00045"></a>00045 my_body(my_value); |
| <a name="l00046"></a>00046 <span class="keywordflow">return</span> NULL; |
| <a name="l00047"></a>00047 } |
| <a name="l00048"></a>00048 while_iteration_task( <span class="keyword">const</span> <span class="keyword">typename</span> Body::argument_type& value, <span class="keyword">const</span> Body& body ) : |
| <a name="l00049"></a>00049 my_body(body), my_value(value) |
| <a name="l00050"></a>00050 {} |
| <a name="l00051"></a>00051 <span class="keyword">template</span><<span class="keyword">typename</span> Body_> <span class="keyword">friend</span> <span class="keyword">class </span>while_group_task; |
| <a name="l00052"></a>00052 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a00179.html">tbb::parallel_while</a><Body>; |
| <a name="l00053"></a>00053 }; |
| <a name="l00054"></a>00054 |
| <a name="l00056"></a>00056 |
| <a name="l00058"></a>00058 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00059"></a>00059 <span class="keyword">class </span>while_group_task: <span class="keyword">public</span> task { |
| <a name="l00060"></a>00060 <span class="keyword">static</span> <span class="keyword">const</span> size_t max_arg_size = 4; |
| <a name="l00061"></a>00061 <span class="keyword">const</span> Body& my_body; |
| <a name="l00062"></a>00062 size_t size; |
| <a name="l00063"></a>00063 <span class="keyword">typename</span> Body::argument_type my_arg[max_arg_size]; |
| <a name="l00064"></a>00064 while_group_task( <span class="keyword">const</span> Body& body ) : my_body(body), size(0) {} |
| <a name="l00065"></a>00065 <span class="comment">/*override*/</span> task* execute() { |
| <a name="l00066"></a>00066 <span class="keyword">typedef</span> while_iteration_task<Body> iteration_type; |
| <a name="l00067"></a>00067 __TBB_ASSERT( size>0, NULL ); |
| <a name="l00068"></a>00068 task_list list; |
| <a name="l00069"></a>00069 task* t; |
| <a name="l00070"></a>00070 size_t k=0; |
| <a name="l00071"></a>00071 <span class="keywordflow">for</span>(;;) { |
| <a name="l00072"></a>00072 t = <span class="keyword">new</span>( allocate_child() ) iteration_type(my_arg[k],my_body); |
| <a name="l00073"></a>00073 <span class="keywordflow">if</span>( ++k==size ) <span class="keywordflow">break</span>; |
| <a name="l00074"></a>00074 list.push_back(*t); |
| <a name="l00075"></a>00075 } |
| <a name="l00076"></a>00076 set_ref_count(<span class="keywordtype">int</span>(k+1)); |
| <a name="l00077"></a>00077 spawn(list); |
| <a name="l00078"></a>00078 spawn_and_wait_for_all(*t); |
| <a name="l00079"></a>00079 <span class="keywordflow">return</span> NULL; |
| <a name="l00080"></a>00080 } |
| <a name="l00081"></a>00081 <span class="keyword">template</span><<span class="keyword">typename</span> Stream, <span class="keyword">typename</span> Body_> <span class="keyword">friend</span> <span class="keyword">class </span>while_task; |
| <a name="l00082"></a>00082 }; |
| <a name="l00083"></a>00083 |
| <a name="l00085"></a>00085 |
| <a name="l00087"></a>00087 <span class="keyword">template</span><<span class="keyword">typename</span> Stream, <span class="keyword">typename</span> Body> |
| <a name="l00088"></a>00088 <span class="keyword">class </span>while_task: <span class="keyword">public</span> task { |
| <a name="l00089"></a>00089 Stream& my_stream; |
| <a name="l00090"></a>00090 <span class="keyword">const</span> Body& my_body; |
| <a name="l00091"></a>00091 empty_task& my_barrier; |
| <a name="l00092"></a>00092 <span class="comment">/*override*/</span> task* execute() { |
| <a name="l00093"></a>00093 <span class="keyword">typedef</span> while_group_task<Body> block_type; |
| <a name="l00094"></a>00094 block_type& t = *<span class="keyword">new</span>( allocate_additional_child_of(my_barrier) ) block_type(my_body); |
| <a name="l00095"></a>00095 size_t k=0; |
| <a name="l00096"></a>00096 <span class="keywordflow">while</span>( my_stream.pop_if_present(t.my_arg[k]) ) { |
| <a name="l00097"></a>00097 <span class="keywordflow">if</span>( ++k==block_type::max_arg_size ) { |
| <a name="l00098"></a>00098 <span class="comment">// There might be more iterations.</span> |
| <a name="l00099"></a>00099 recycle_to_reexecute(); |
| <a name="l00100"></a>00100 <span class="keywordflow">break</span>; |
| <a name="l00101"></a>00101 } |
| <a name="l00102"></a>00102 } |
| <a name="l00103"></a>00103 <span class="keywordflow">if</span>( k==0 ) { |
| <a name="l00104"></a>00104 destroy(t); |
| <a name="l00105"></a>00105 <span class="keywordflow">return</span> NULL; |
| <a name="l00106"></a>00106 } <span class="keywordflow">else</span> { |
| <a name="l00107"></a>00107 t.size = k; |
| <a name="l00108"></a>00108 <span class="keywordflow">return</span> &t; |
| <a name="l00109"></a>00109 } |
| <a name="l00110"></a>00110 } |
| <a name="l00111"></a>00111 while_task( Stream& stream, <span class="keyword">const</span> Body& body, empty_task& barrier ) : |
| <a name="l00112"></a>00112 my_stream(stream), |
| <a name="l00113"></a>00113 my_body(body), |
| <a name="l00114"></a>00114 my_barrier(barrier) |
| <a name="l00115"></a>00115 {} |
| <a name="l00116"></a>00116 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="a00179.html">tbb::parallel_while</a><Body>; |
| <a name="l00117"></a>00117 }; |
| <a name="l00118"></a>00118 |
| <a name="l00119"></a>00119 } <span class="comment">// namespace internal</span> |
| <a name="l00121"></a>00121 <span class="comment"></span> |
| <a name="l00123"></a>00123 |
| <a name="l00128"></a>00128 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00129"></a><a class="code" href="a00179.html">00129</a> <span class="keyword">class </span><a class="code" href="a00179.html">parallel_while</a>: internal::no_copy { |
| <a name="l00130"></a>00130 <span class="keyword">public</span>: |
| <a name="l00132"></a><a class="code" href="a00179.html#36e26ba3880c7bcf804a97ba0cbe133f">00132</a> <a class="code" href="a00179.html#36e26ba3880c7bcf804a97ba0cbe133f">parallel_while</a>() : my_body(NULL), my_barrier(NULL) {} |
| <a name="l00133"></a>00133 |
| <a name="l00135"></a><a class="code" href="a00179.html#6fcfc973cc56b79c6d0fbb8a31be7e84">00135</a> <a class="code" href="a00179.html#6fcfc973cc56b79c6d0fbb8a31be7e84">~parallel_while</a>() { |
| <a name="l00136"></a>00136 <span class="keywordflow">if</span>( my_barrier ) { |
| <a name="l00137"></a>00137 my_barrier-><a class="code" href="a00199.html#dfaacf92685e5f86393bf657b2853bf8">destroy</a>(*my_barrier); |
| <a name="l00138"></a>00138 my_barrier = NULL; |
| <a name="l00139"></a>00139 } |
| <a name="l00140"></a>00140 } |
| <a name="l00141"></a>00141 |
| <a name="l00143"></a><a class="code" href="a00179.html#fa297e53d3af2a101e712bc200233e9c">00143</a> <span class="keyword">typedef</span> <span class="keyword">typename</span> Body::argument_type <a class="code" href="a00179.html#fa297e53d3af2a101e712bc200233e9c">value_type</a>; |
| <a name="l00144"></a>00144 |
| <a name="l00146"></a>00146 |
| <a name="l00149"></a>00149 <span class="keyword">template</span><<span class="keyword">typename</span> Stream> |
| <a name="l00150"></a>00150 <span class="keywordtype">void</span> <a class="code" href="a00179.html#b32a0a6e5e09ebb7fad3e6652c19afe5">run</a>( Stream& stream, <span class="keyword">const</span> Body& body ); |
| <a name="l00151"></a>00151 |
| <a name="l00153"></a>00153 |
| <a name="l00154"></a>00154 <span class="keywordtype">void</span> <a class="code" href="a00179.html#e131c560057a58229992b61eb8dba4c6">add</a>( <span class="keyword">const</span> <a class="code" href="a00179.html#fa297e53d3af2a101e712bc200233e9c">value_type</a>& item ); |
| <a name="l00155"></a>00155 |
| <a name="l00156"></a>00156 <span class="keyword">private</span>: |
| <a name="l00157"></a>00157 <span class="keyword">const</span> Body* my_body; |
| <a name="l00158"></a>00158 <a class="code" href="a00163.html">empty_task</a>* my_barrier; |
| <a name="l00159"></a>00159 }; |
| <a name="l00160"></a>00160 |
| <a name="l00161"></a>00161 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00162"></a>00162 <span class="keyword">template</span><<span class="keyword">typename</span> Stream> |
| <a name="l00163"></a><a class="code" href="a00179.html#b32a0a6e5e09ebb7fad3e6652c19afe5">00163</a> <span class="keywordtype">void</span> <a class="code" href="a00179.html">parallel_while<Body>::run</a>( Stream& stream, <span class="keyword">const</span> Body& body ) { |
| <a name="l00164"></a>00164 <span class="keyword">using namespace </span>internal; |
| <a name="l00165"></a>00165 <a class="code" href="a00163.html">empty_task</a>& barrier = *<span class="keyword">new</span>( <a class="code" href="a00199.html#23acb0da0afd690da797f9f882027d34">task::allocate_root</a>() ) <a class="code" href="a00163.html">empty_task</a>(); |
| <a name="l00166"></a>00166 my_body = &body; |
| <a name="l00167"></a>00167 my_barrier = &barrier; |
| <a name="l00168"></a>00168 my_barrier-><a class="code" href="a00199.html#06a4206a57e8e12a439b14d6d41cfd92">set_ref_count</a>(2); |
| <a name="l00169"></a>00169 while_task<Stream,Body>& w = *<span class="keyword">new</span>( my_barrier-><a class="code" href="a00199.html#1ff794f7053cd9148d5f280fbf07377f">allocate_child</a>() ) while_task<Stream,Body>( stream, body, barrier ); |
| <a name="l00170"></a>00170 my_barrier-><a class="code" href="a00199.html#3ce28ca9baa771cfc37ecd72e69c4f3c">spawn_and_wait_for_all</a>(w); |
| <a name="l00171"></a>00171 my_barrier-><a class="code" href="a00199.html#dfaacf92685e5f86393bf657b2853bf8">destroy</a>(*my_barrier); |
| <a name="l00172"></a>00172 my_barrier = NULL; |
| <a name="l00173"></a>00173 my_body = NULL; |
| <a name="l00174"></a>00174 } |
| <a name="l00175"></a>00175 |
| <a name="l00176"></a>00176 <span class="keyword">template</span><<span class="keyword">typename</span> Body> |
| <a name="l00177"></a><a class="code" href="a00179.html#e131c560057a58229992b61eb8dba4c6">00177</a> <span class="keywordtype">void</span> <a class="code" href="a00179.html">parallel_while<Body>::add</a>( <span class="keyword">const</span> value_type& item ) { |
| <a name="l00178"></a>00178 __TBB_ASSERT(my_barrier,<span class="stringliteral">"attempt to add to parallel_while that is not running"</span>); |
| <a name="l00179"></a>00179 <span class="keyword">typedef</span> internal::while_iteration_task<Body> iteration_type; |
| <a name="l00180"></a>00180 iteration_type& i = *<span class="keyword">new</span>( task::allocate_additional_child_of(*my_barrier) ) iteration_type(item,*my_body); |
| <a name="l00181"></a>00181 <a class="code" href="a00199.html#bd43e8d6249738efafd12d6a4c72c5e3">task::self</a>().spawn( i ); |
| <a name="l00182"></a>00182 } |
| <a name="l00183"></a>00183 |
| <a name="l00184"></a>00184 } <span class="comment">// namespace </span> |
| <a name="l00185"></a>00185 |
| <a name="l00186"></a>00186 <span class="preprocessor">#endif </span><span class="comment">/* __TBB_parallel_while */</span> |
| </pre></div><hr> |
| <p></p> |
| Copyright © 2005-2010 Intel Corporation. All Rights Reserved. |
| <p></p> |
| Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are |
| registered trademarks or trademarks of Intel Corporation or its |
| subsidiaries in the United States and other countries. |
| <p></p> |
| * Other names and brands may be claimed as the property of others. |
