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<li class="navelem"><a class="el" href="dir_d6b28f7731906a8cbc4171450df4b180.html">fairmq</a></li> </ul>
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<div class="title">MemoryResourceTools.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/********************************************************************************</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2018 CERN and copyright holders of ALICE O2 *</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (C) 2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * *</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This software is distributed under the terms of the *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * GNU Lesser General Public Licence (LGPL) version 3, *</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * copied verbatim in the file "LICENSE" *</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> ********************************************************************************/</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <fairmq/FairMQTransportFactory.h></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <fairmq/MemoryResources.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span><a class="code" href="namespacefair.html">fair</a> {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>mq {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">using</span> BytePmrAllocator = pmr::polymorphic_allocator<fair::mq::byte>;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">//_________________________________________________________________________________________________</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// return the message associated with the container or throw if it is not possible</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">template</span><<span class="keyword">typename</span> ContainerT></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// typename std::enable_if<</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// std::is_base_of<</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// pmr::polymorphic_allocator<typename</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// ContainerT::value_type>,</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// typename ContainerT::allocator_type>::value == true,</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// FairMQMessagePtr>::type</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> FairMQMessagePtr getMessage(ContainerT &&container_, FairMQMemoryResource *targetResource = <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> {</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">auto</span> container = std::move(container_);</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">auto</span> alloc = container.get_allocator();</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">auto</span> resource = <span class="keyword">dynamic_cast<</span>FairMQMemoryResource *<span class="keyword">></span>(alloc.resource());</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">if</span> (!resource && !targetResource) {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">throw</span> std::runtime_error(<span class="stringliteral">"Neither the container or target resource specified"</span>);</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">size_t</span> containerSizeBytes = container.size() * <span class="keyword">sizeof</span>(<span class="keyword">typename</span> ContainerT::value_type);</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">if</span> ((!targetResource && resource)</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  || (resource && targetResource && resource->is_equal(*targetResource))) {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">auto</span> message = resource->getMessage(static_cast<void *>(</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">const_cast<</span>typename std::remove_const<typename ContainerT::value_type>::type *<span class="keyword">></span>(</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  container.data())));</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">if</span> (message)</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  {</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  message->SetUsedSize(containerSizeBytes);</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> message;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">//container is not required to allocate (like in std::string small string optimization)</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">//in case we get no message we fall back to default (copy) behaviour)</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  targetResource = resource;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">auto</span> message = targetResource->getTransportFactory()->CreateMessage(containerSizeBytes);</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  std::memcpy(static_cast<fair::mq::byte *>(message->GetData()),</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  container.data(),</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  containerSizeBytes);</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">return</span> message;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> } <span class="comment">/* namespace mq */</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> } <span class="comment">/* namespace fair */</span></div><div class="ttc" id="namespacefair_html"><div class="ttname"><a href="namespacefair.html">fair</a></div><div class="ttdoc">Tools for interfacing containers to the transport via polymorphic allocators. </div><div class="ttdef"><b>Definition:</b> DeviceRunner.h:23</div></div>
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<p style="margin: 0 12px 10px 12px;"><a href="https://help.github.com/articles/github-privacy-statement/">privacy</a></p>
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