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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div id="projectname">aws-crt-cpp
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<div id="projectbrief">C++ wrapper around the aws-c-* libraries. Provides Cross-Platform Transport Protocols and SSL/TLS implementations for C++.</div>
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<a href="_ref_counted_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include <aws/common/assert.h></span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include <memory></span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include <mutex></span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespace_aws.html">Aws</a></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span>{</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">namespace </span>Crt</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> {</div>
<div class="foldopen" id="foldopen00028" data-start="{" data-end="};">
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="class_aws_1_1_crt_1_1_ref_counted.html"> 28</a></span> <span class="keyword">template</span> <<span class="keyword">class</span> T> <span class="keyword">class </span><a class="code hl_class" href="class_aws_1_1_crt_1_1_ref_counted.html">RefCounted</a></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> {</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">protected</span>:</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="class_aws_1_1_crt_1_1_ref_counted.html#a589135bfcc41f9a139ab4a63d1120753"> 31</a></span> <a class="code hl_function" href="class_aws_1_1_crt_1_1_ref_counted.html#a589135bfcc41f9a139ab4a63d1120753">RefCounted</a>() {}</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="class_aws_1_1_crt_1_1_ref_counted.html#ad5f3e090f9670145bf5dc83212438a9c"> 32</a></span> <a class="code hl_function" href="class_aws_1_1_crt_1_1_ref_counted.html#ad5f3e090f9670145bf5dc83212438a9c">~RefCounted</a>() {}</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="foldopen" id="foldopen00034" data-start="{" data-end="}">
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"><a class="line" href="class_aws_1_1_crt_1_1_ref_counted.html#a7d9f25dd91361b71fcda036768e28860"> 34</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="class_aws_1_1_crt_1_1_ref_counted.html#a7d9f25dd91361b71fcda036768e28860">AcquireRef</a>()</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> {</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> m_mutex.lock();</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">if</span> (m_count++ == 0)</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> {</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> m_strongPtr = <span class="keyword">static_cast<</span><a class="code hl_typedef" href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">T</a> *<span class="keyword">></span>(<span class="keyword">this</span>)-><a class="code hl_typedef" href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">shared_from_this</a>();</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> }</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> m_mutex.unlock();</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> }</div>
</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="foldopen" id="foldopen00044" data-start="{" data-end="}">
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="class_aws_1_1_crt_1_1_ref_counted.html#a8ea27349c3b0984fda508ed6c14b9329"> 44</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="class_aws_1_1_crt_1_1_ref_counted.html#a8ea27349c3b0984fda508ed6c14b9329">ReleaseRef</a>()</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> {</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// Move contents of m_strongPtr to a temp so that this</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// object can't be destroyed until the function exits.</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> std::shared_ptr<T> <a class="code hl_typedef" href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">tmpStrongPtr</a>;</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> m_mutex.lock();</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <a class="code hl_typedef" href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">AWS_ASSERT</a>(m_count > 0 && <span class="stringliteral">"refcount has gone negative"</span>);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">if</span> (m_count-- == 1)</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> {</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> std::swap(m_strongPtr, <a class="code hl_typedef" href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">tmpStrongPtr</a>);</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> }</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> m_mutex.unlock();</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> }</div>
</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <a class="code hl_function" href="class_aws_1_1_crt_1_1_ref_counted.html#a589135bfcc41f9a139ab4a63d1120753">RefCounted</a>(<span class="keyword">const</span> <a class="code hl_class" href="class_aws_1_1_crt_1_1_ref_counted.html">RefCounted</a> &) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <a class="code hl_class" href="class_aws_1_1_crt_1_1_ref_counted.html">RefCounted</a> &operator=(<span class="keyword">const</span> <a class="code hl_class" href="class_aws_1_1_crt_1_1_ref_counted.html">RefCounted</a> &) = <span class="keyword">delete</span>;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordtype">size_t</span> m_count = 0;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> std::shared_ptr<T> m_strongPtr;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> std::mutex m_mutex;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> };</div>
</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> } <span class="comment">// namespace Crt</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span>} <span class="comment">// namespace Aws</span></div>
<div class="ttc" id="aclass_aws_1_1_crt_1_1_ref_counted_html"><div class="ttname"><a href="class_aws_1_1_crt_1_1_ref_counted.html">Aws::Crt::RefCounted</a></div><div class="ttdef"><b>Definition</b> RefCounted.h:29</div></div>
<div class="ttc" id="aclass_aws_1_1_crt_1_1_ref_counted_html_a589135bfcc41f9a139ab4a63d1120753"><div class="ttname"><a href="class_aws_1_1_crt_1_1_ref_counted.html#a589135bfcc41f9a139ab4a63d1120753">Aws::Crt::RefCounted::RefCounted</a></div><div class="ttdeci">RefCounted()</div><div class="ttdef"><b>Definition</b> RefCounted.h:31</div></div>
<div class="ttc" id="aclass_aws_1_1_crt_1_1_ref_counted_html_a7d9f25dd91361b71fcda036768e28860"><div class="ttname"><a href="class_aws_1_1_crt_1_1_ref_counted.html#a7d9f25dd91361b71fcda036768e28860">Aws::Crt::RefCounted::AcquireRef</a></div><div class="ttdeci">void AcquireRef()</div><div class="ttdef"><b>Definition</b> RefCounted.h:34</div></div>
<div class="ttc" id="aclass_aws_1_1_crt_1_1_ref_counted_html_a8ea27349c3b0984fda508ed6c14b9329"><div class="ttname"><a href="class_aws_1_1_crt_1_1_ref_counted.html#a8ea27349c3b0984fda508ed6c14b9329">Aws::Crt::RefCounted::ReleaseRef</a></div><div class="ttdeci">void ReleaseRef()</div><div class="ttdef"><b>Definition</b> RefCounted.h:44</div></div>
<div class="ttc" id="aclass_aws_1_1_crt_1_1_ref_counted_html_ad5f3e090f9670145bf5dc83212438a9c"><div class="ttname"><a href="class_aws_1_1_crt_1_1_ref_counted.html#ad5f3e090f9670145bf5dc83212438a9c">Aws::Crt::RefCounted::~RefCounted</a></div><div class="ttdeci">~RefCounted()</div><div class="ttdef"><b>Definition</b> RefCounted.h:32</div></div>
<div class="ttc" id="anamespace_aws_1_1_crt_html_aa8f82604df3f410e862691561154627e"><div class="ttname"><a href="namespace_aws_1_1_crt.html#aa8f82604df3f410e862691561154627e">Aws::Crt::ScopedResource</a></div><div class="ttdeci">std::unique_ptr< T, std::function< void(T *)> > ScopedResource</div><div class="ttdef"><b>Definition</b> Types.h:163</div></div>
<div class="ttc" id="anamespace_aws_html"><div class="ttname"><a href="namespace_aws.html">Aws</a></div><div class="ttdef"><b>Definition</b> Allocator.h:11</div></div>
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