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<li class="navelem"><a class="el" href="dir_4be4f7b278e009bf0f1906cf31fb73bd.html">UnitTests</a></li> </ul>
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<div class="headertitle"><div class="title">ring.cpp</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> SPDX-License-Identifier: MIT</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> Copyright © 2023 Amebis</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">*/</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include "pch.h"</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="keyword">using namespace </span>std;</div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#ifdef _WIN32</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="keyword">using namespace </span>Microsoft::VisualStudio::CppUnitTestFramework;</div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#endif</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="keyword">namespace </span>UnitTests</div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span>{</div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">constexpr</span> <span class="keywordtype">size_t</span> capacity = 50;</div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> TEST_CLASS(ring)</div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> {</div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> TEST_METHOD(test)</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> {</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using </span>ring_t = <a class="code hl_class" href="classstdex_1_1ring.html">stdex::ring<int, capacity></a>;</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> ring_t ring;</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> thread writer([](_Inout_ ring_t& ring)</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> {</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordtype">int</span> seed = 0;</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> retries = 1000; retries--;) {</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> to_write = <span class="keyword">static_cast<</span><span class="keywordtype">size_t</span><span class="keyword">></span>(<span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(::rand()) * capacity / 5 / RAND_MAX); to_write;) {</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordtype">int</span>* ptr; <span class="keywordtype">size_t</span> num_write;</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> tie(ptr, num_write) = ring.back();</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">if</span> (to_write < num_write)</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> num_write = to_write;</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < num_write; i++)</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> ptr[i] = seed++;</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> ring.push(num_write);</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> to_write -= num_write;</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> }</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> ring.quit();</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> }, ref(ring));</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordtype">int</span> seed = 0;</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">for</span> (;;) {</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordtype">int</span>* ptr; <span class="keywordtype">size_t</span> num_read;</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> tie(ptr, num_read) = ring.<a class="code hl_function" href="classstdex_1_1ring.html#a9b6571832cc636d98885af61651a0998">front</a>();</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">if</span> (!ptr) _Unlikely_</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordflow">if</span> (num_read > 7)</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> num_read = 7;</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < num_read; ++i)</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> Assert::AreEqual(seed++, ptr[i]);</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> ring.pop(num_read);</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> }</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> writer.join();</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> }</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> };</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span>}</div>
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<div class="ttc" id="aclassstdex_1_1ring_html"><div class="ttname"><a href="classstdex_1_1ring.html">stdex::ring</a></div><div class="ttdoc">Ring buffer.</div><div class="ttdef"><b>Definition</b> ring.hpp:24</div></div>
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<div class="ttc" id="aclassstdex_1_1ring_html_a9b6571832cc636d98885af61651a0998"><div class="ttname"><a href="classstdex_1_1ring.html#a9b6571832cc636d98885af61651a0998">stdex::ring::front</a></div><div class="ttdeci">std::tuple< T *, size_t > front()</div><div class="ttdoc">Peeks the data at the ring head. Use pop() after the data was consumed.</div><div class="ttdef"><b>Definition</b> ring.hpp:73</div></div>
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