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<li class="navelem"><a class="el" href="dir_17297ffb27ce571941f5fb5008f01a1f.html">dl</a></li><li class="navelem"><a class="el" href="dir_d483d22d183a78db490f3ff6a4a958eb.html">math</a></li> </ul>
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<div class="headertitle"><div class="title">dl_guid.h</div></div>
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<div class="contents">
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<a href="dl__guid_8h.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#pragma once</span></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="preprocessor">#include <array></span></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><span class="preprocessor">#include "<a class="code" href="dl__type_8h.html">dl_type.h</a>"</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include "<a class="code" href="dl__math_8h.html">math/dl_math.h</a>"</span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include "<a class="code" href="dl__time_8h.html">system/dl_time.h</a>"</span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacedl.html">dl</a></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span>{</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="namespacedl.html#a40799e3af2c38a10d2f50db29ab569f2"> 23</a></span> <span class="keyword">using </span><a class="code hl_typedef" href="namespacedl.html#a40799e3af2c38a10d2f50db29ab569f2">Uid</a> = uint64_t;</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"><a class="line" href="namespacedl.html#a10fdd4b0026892669612255584c39088"> 24</a></span> <span class="keyword">using </span><a class="code hl_typedef" href="namespacedl.html#a10fdd4b0026892669612255584c39088">Guid</a> = std::array<uint64_t, 2>;</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="l00027" name="l00027"></a><span class="lineno"><a class="line" href="namespacedl.html#a4b0e4caeb098c730a286fcc9b2476200"> 27</a></span> <span class="keyword">constexpr</span> uint8_t <a class="code hl_variable" href="namespacedl.html#a4b0e4caeb098c730a286fcc9b2476200">UID_STEP</a> = 16;</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="namespacedl.html#a56367196bc122d5420d441f181f143ab"> 29</a></span> <span class="keyword">constexpr</span> uint64_t <a class="code hl_variable" href="namespacedl.html#a56367196bc122d5420d441f181f143ab">UID_YEAR_SECOND_X</a> = 366ull * 24ull * 60ull * 60ull * <a class="code hl_variable" href="namespacedl.html#a4b0e4caeb098c730a286fcc9b2476200">UID_STEP</a>;</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="namespacedl.html#a23909254ca75ee5c5a7c8a039215f0bd"> 31</a></span> <span class="keyword">constexpr</span> uint8_t <a class="code hl_variable" href="namespacedl.html#a23909254ca75ee5c5a7c8a039215f0bd">UID_YEAR</a> = 100;</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"><a class="line" href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169"> 33</a></span> <span class="keyword">constexpr</span> uint8_t <a class="code hl_variable" href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169">UID_BIT_USER</a> = 8;</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"><a class="line" href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975"> 35</a></span> <span class="keyword">constexpr</span> uint8_t <a class="code hl_variable" href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975">UID_BIT_TIME</a> = 40;</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="namespacedl.html#a7be6346888e8a21e69cba07644603913"> 37</a></span> <span class="keyword">constexpr</span> uint64_t <a class="code hl_variable" href="namespacedl.html#a7be6346888e8a21e69cba07644603913">UID_STEP_COUNT</a> = <a class="code hl_function" href="namespacedl_1_1_math.html#a105a64a6e1c5f63f3510ddc57c676365">Math::Pow64</a>(2, 64 - <a class="code hl_variable" href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975">UID_BIT_TIME</a> - <a class="code hl_variable" href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169">UID_BIT_USER</a>);</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"><a class="line" href="namespacedl.html#a007d0c8e4e16d0af4aab7ca613ffc90f"> 39</a></span> <span class="keyword">constexpr</span> uint64_t <a class="code hl_variable" href="namespacedl.html#a007d0c8e4e16d0af4aab7ca613ffc90f">UID_POW_2_X</a> = <a class="code hl_function" href="namespacedl_1_1_math.html#a105a64a6e1c5f63f3510ddc57c676365">Math::Pow64</a>(2, <a class="code hl_variable" href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975">UID_BIT_TIME</a>);</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span></div>
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<div class="foldopen" id="foldopen00042" data-start="{" data-end="};">
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"><a class="line" href="classdl_1_1_uid_generator.html"> 42</a></span> <span class="keyword">class </span><a class="code hl_class" href="classdl_1_1_uid_generator.html">UidGenerator</a></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> {</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">public</span>:</div>
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<div class="foldopen" id="foldopen00046" data-start="{" data-end="}">
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"><a class="line" href="classdl_1_1_uid_generator.html#a8abf89e97a4d0f237ef51b6826380be2"> 46</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="classdl_1_1_uid_generator.html#a8abf89e97a4d0f237ef51b6826380be2">Init</a>(time_t t_start, uint64_t user)</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> {</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">static_assert</span>(<a class="code hl_variable" href="namespacedl.html#a56367196bc122d5420d441f181f143ab">UID_YEAR_SECOND_X</a> * <a class="code hl_variable" href="namespacedl.html#a23909254ca75ee5c5a7c8a039215f0bd">UID_YEAR</a> < <a class="code hl_variable" href="namespacedl.html#a007d0c8e4e16d0af4aab7ca613ffc90f">UID_POW_2_X</a>);</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> _tStart = t_start;</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> _user = user;</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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</div>
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<div class="foldopen" id="foldopen00052" data-start="{" data-end="}">
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"><a class="line" href="classdl_1_1_uid_generator.html#aa681d0699184daf805d094f32cf67bae"> 52</a></span> <span class="keyword">static</span> <a class="code hl_typedef" href="namespacedl.html#a40799e3af2c38a10d2f50db29ab569f2">Uid</a> <a class="code hl_function" href="classdl_1_1_uid_generator.html#aa681d0699184daf805d094f32cf67bae">CreateUid</a>()</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> redo:</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> time_t t = <a class="code hl_function" href="classdl_1_1_time.html#ae516f1fdfdd5d973ebe5598e28146411">Time::GetTimeStampMs</a>();</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> time_t t_cur = t - _tStart;</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// 同一秒</span></div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">if</span> (t_cur == _tCur)</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> {</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">if</span> (_i + 1 == 0)</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> {<span class="comment">// 越界</span></div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <a class="code hl_define" href="dl__log_8h.html#a04af09851c431d178f16b24fa1aac1e9">log_warn</a>(<span class="stringliteral">"短时间生成uid过多，即将阻塞等待！"</span>);</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <a class="code hl_function" href="classdl_1_1_time.html#a5f64dff7957e57ec716f8fff491e21b7">Time::Sleep</a>(<a class="code hl_variable" href="namespacedl.html#a4b0e4caeb098c730a286fcc9b2476200">UID_STEP</a>);</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">goto</span> redo;</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">return</span> _make();</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> }</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> {</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> _tCur = t_cur;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> _i = 0;</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">return</span> _make();</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> }</div>
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</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">static</span> time_t _tStart;</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">static</span> time_t _tCur; </div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">static</span> uint32_t _i; </div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">static</span> uint64_t _user;</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">static</span> uint64_t _make()</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> {</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">return</span> (_user << (64 - <a class="code hl_variable" href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169">UID_BIT_USER</a>))</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> | ((uint64_t)_tCur << (64 - <a class="code hl_variable" href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975">UID_BIT_TIME</a> - <a class="code hl_variable" href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169">UID_BIT_USER</a>))</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> | ((uint64_t)_i++);</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> }</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> };</div>
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</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span>}</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> </div>
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<div class="ttc" id="aclassdl_1_1_time_html_a5f64dff7957e57ec716f8fff491e21b7"><div class="ttname"><a href="classdl_1_1_time.html#a5f64dff7957e57ec716f8fff491e21b7">dl::Time::Sleep</a></div><div class="ttdeci">static void Sleep(unsigned t=0)</div><div class="ttdoc">阻塞线程毫秒数（不精确）</div></div>
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<div class="ttc" id="aclassdl_1_1_time_html_ae516f1fdfdd5d973ebe5598e28146411"><div class="ttname"><a href="classdl_1_1_time.html#ae516f1fdfdd5d973ebe5598e28146411">dl::Time::GetTimeStampMs</a></div><div class="ttdeci">static time_t GetTimeStampMs()</div><div class="ttdoc">返回时间戳(毫秒)</div></div>
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<div class="ttc" id="aclassdl_1_1_uid_generator_html"><div class="ttname"><a href="classdl_1_1_uid_generator.html">dl::UidGenerator</a></div><div class="ttdoc">uid生成器</div><div class="ttdef"><b>定义</b> <a href="#l00042">dl_guid.h:43</a></div></div>
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<div class="ttc" id="aclassdl_1_1_uid_generator_html_a8abf89e97a4d0f237ef51b6826380be2"><div class="ttname"><a href="classdl_1_1_uid_generator.html#a8abf89e97a4d0f237ef51b6826380be2">dl::UidGenerator::Init</a></div><div class="ttdeci">static void Init(time_t t_start, uint64_t user)</div><div class="ttdoc">设置起始点时间戳（可以不调用）</div><div class="ttdef"><b>定义</b> <a href="#l00046">dl_guid.h:46</a></div></div>
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<div class="ttc" id="aclassdl_1_1_uid_generator_html_aa681d0699184daf805d094f32cf67bae"><div class="ttname"><a href="classdl_1_1_uid_generator.html#aa681d0699184daf805d094f32cf67bae">dl::UidGenerator::CreateUid</a></div><div class="ttdeci">static Uid CreateUid()</div><div class="ttdef"><b>定义</b> <a href="#l00052">dl_guid.h:52</a></div></div>
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<div class="ttc" id="adl__log_8h_html_a04af09851c431d178f16b24fa1aac1e9"><div class="ttname"><a href="dl__log_8h.html#a04af09851c431d178f16b24fa1aac1e9">log_warn</a></div><div class="ttdeci">#define log_warn(...)</div><div class="ttdef"><b>定义</b> <a href="dl__log_8h_source.html#l00283">dl_log.h:283</a></div></div>
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<div class="ttc" id="adl__math_8h_html"><div class="ttname"><a href="dl__math_8h.html">dl_math.h</a></div><div class="ttdoc">数学相关的通用算法</div></div>
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<div class="ttc" id="adl__time_8h_html"><div class="ttname"><a href="dl__time_8h.html">dl_time.h</a></div><div class="ttdoc">时间相关</div></div>
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<div class="ttc" id="adl__type_8h_html"><div class="ttname"><a href="dl__type_8h.html">dl_type.h</a></div><div class="ttdoc">通用类型</div></div>
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<div class="ttc" id="anamespacedl_1_1_math_html_a105a64a6e1c5f63f3510ddc57c676365"><div class="ttname"><a href="namespacedl_1_1_math.html#a105a64a6e1c5f63f3510ddc57c676365">dl::Math::Pow64</a></div><div class="ttdeci">constexpr uint64_t Pow64(uint64_t x, uint8_t n)</div><div class="ttdef"><b>定义</b> <a href="dl__math_8h_source.html#l00140">dl_math.h:140</a></div></div>
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<div class="ttc" id="anamespacedl_html"><div class="ttname"><a href="namespacedl.html">dl</a></div><div class="ttdef"><b>定义</b> <a href="dl__array_8h_source.html#l00021">dl_array.h:22</a></div></div>
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<div class="ttc" id="anamespacedl_html_a007d0c8e4e16d0af4aab7ca613ffc90f"><div class="ttname"><a href="namespacedl.html#a007d0c8e4e16d0af4aab7ca613ffc90f">dl::UID_POW_2_X</a></div><div class="ttdeci">constexpr uint64_t UID_POW_2_X</div><div class="ttdoc">时间戳占据位数能表示的上限</div><div class="ttdef"><b>定义</b> <a href="#l00039">dl_guid.h:39</a></div></div>
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<div class="ttc" id="anamespacedl_html_a10fdd4b0026892669612255584c39088"><div class="ttname"><a href="namespacedl.html#a10fdd4b0026892669612255584c39088">dl::Guid</a></div><div class="ttdeci">std::array< uint64_t, 2 > Guid</div><div class="ttdef"><b>定义</b> <a href="#l00024">dl_guid.h:24</a></div></div>
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<div class="ttc" id="anamespacedl_html_a23909254ca75ee5c5a7c8a039215f0bd"><div class="ttname"><a href="namespacedl.html#a23909254ca75ee5c5a7c8a039215f0bd">dl::UID_YEAR</a></div><div class="ttdeci">constexpr uint8_t UID_YEAR</div><div class="ttdoc">需要支持多少年</div><div class="ttdef"><b>定义</b> <a href="#l00031">dl_guid.h:31</a></div></div>
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<div class="ttc" id="anamespacedl_html_a40799e3af2c38a10d2f50db29ab569f2"><div class="ttname"><a href="namespacedl.html#a40799e3af2c38a10d2f50db29ab569f2">dl::Uid</a></div><div class="ttdeci">uint64_t Uid</div><div class="ttdef"><b>定义</b> <a href="#l00023">dl_guid.h:23</a></div></div>
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<div class="ttc" id="anamespacedl_html_a4b0e4caeb098c730a286fcc9b2476200"><div class="ttname"><a href="namespacedl.html#a4b0e4caeb098c730a286fcc9b2476200">dl::UID_STEP</a></div><div class="ttdeci">constexpr uint8_t UID_STEP</div><div class="ttdoc">单步生成时间（毫秒）</div><div class="ttdef"><b>定义</b> <a href="#l00027">dl_guid.h:27</a></div></div>
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<div class="ttc" id="anamespacedl_html_a56367196bc122d5420d441f181f143ab"><div class="ttname"><a href="namespacedl.html#a56367196bc122d5420d441f181f143ab">dl::UID_YEAR_SECOND_X</a></div><div class="ttdeci">constexpr uint64_t UID_YEAR_SECOND_X</div><div class="ttdoc">一年生成的数量</div><div class="ttdef"><b>定义</b> <a href="#l00029">dl_guid.h:29</a></div></div>
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<div class="ttc" id="anamespacedl_html_a7be6346888e8a21e69cba07644603913"><div class="ttname"><a href="namespacedl.html#a7be6346888e8a21e69cba07644603913">dl::UID_STEP_COUNT</a></div><div class="ttdeci">constexpr uint64_t UID_STEP_COUNT</div><div class="ttdoc">单步最大数量</div><div class="ttdef"><b>定义</b> <a href="#l00037">dl_guid.h:37</a></div></div>
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<div class="ttc" id="anamespacedl_html_a8aeb1481941345c8901b43673ccd5975"><div class="ttname"><a href="namespacedl.html#a8aeb1481941345c8901b43673ccd5975">dl::UID_BIT_TIME</a></div><div class="ttdeci">constexpr uint8_t UID_BIT_TIME</div><div class="ttdoc">时间戳占据位数</div><div class="ttdef"><b>定义</b> <a href="#l00035">dl_guid.h:35</a></div></div>
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<div class="ttc" id="anamespacedl_html_ad289ea65298c92cf32adf3bc37ccd169"><div class="ttname"><a href="namespacedl.html#ad289ea65298c92cf32adf3bc37ccd169">dl::UID_BIT_USER</a></div><div class="ttdeci">constexpr uint8_t UID_BIT_USER</div><div class="ttdoc">自定义数据位数</div><div class="ttdef"><b>定义</b> <a href="#l00033">dl_guid.h:33</a></div></div>
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