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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_f1714771db42b7b5a0cd2ebe6e9736ed.html">winapi</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com></span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// This file is part of the "winapi-common" project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// For details, see https://github.com/egor-tensin/winapi-common.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Distributed under the MIT License.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>  </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  </div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "handle.hpp"</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <cstddef></span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <memory></span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <string></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <type_traits></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <utility></span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  </div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>winapi {</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>  </div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedMemory.html"> 19</a></span> <span class="keyword">class </span><a class="code" href="classwinapi_1_1SharedMemory.html">SharedMemory</a> {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">static</span> <a class="code" href="classwinapi_1_1SharedMemory.html">SharedMemory</a> <a class="code" href="classwinapi_1_1SharedMemory.html#a475d4dcdf99d777cb0968d7631cc6f7e">create</a>(<span class="keyword">const</span> std::string& name, std::size_t nb);</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">static</span> <a class="code" href="classwinapi_1_1SharedMemory.html">SharedMemory</a> <a class="code" href="classwinapi_1_1SharedMemory.html#a82eafb0e7c2c6b5af1a7ff8945af2027">open</a>(<span class="keyword">const</span> std::string& name);</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  </div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedMemory.html#ada3f0075608dd1541f54f004e18a4775"> 34</a></span>  <span class="keywordtype">void</span>* <a class="code" href="classwinapi_1_1SharedMemory.html#ada3f0075608dd1541f54f004e18a4775">get</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> m_addr.get(); }</div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedMemory.html#a44e75ba35ae3e470fb521f6274991673"> 36</a></span>  <span class="keywordtype">void</span>* <a class="code" href="classwinapi_1_1SharedMemory.html#a44e75ba35ae3e470fb521f6274991673">ptr</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classwinapi_1_1SharedMemory.html#ada3f0075608dd1541f54f004e18a4775">get</a>(); }</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">struct </span>Unmap {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordtype">void</span> operator()(<span class="keywordtype">void</span>*) <span class="keyword">const</span>;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  };</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  SharedMemory() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  SharedMemory(Handle&& handle, <span class="keywordtype">void</span>* addr) : m_handle{std::move(handle)}, m_addr{addr} {}</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  Handle m_handle;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  std::unique_ptr<void, Unmap> m_addr;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> };</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedObject.html"> 53</a></span> <span class="keyword">class </span><a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a> {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> std::aligned_storage<<span class="keyword">sizeof</span>(T), __alignof(T)>::type AlignedType;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">template</span> <<span class="keyword">typename</span>... Args></div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedObject.html#acb4ef5283256d7463fe81c8b312b6745"> 63</a></span>  <span class="keyword">static</span> <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a> <a class="code" href="classwinapi_1_1SharedObject.html#acb4ef5283256d7463fe81c8b312b6745">create</a>(<span class="keyword">const</span> std::string& name, Args&&... args) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a> obj{<a class="code" href="classwinapi_1_1SharedMemory.html#a475d4dcdf99d777cb0968d7631cc6f7e">SharedMemory::create</a>(name, <span class="keyword">sizeof</span>(AlignedType))};</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">new</span> (obj.ptr()) T(std::forward<Args>(args)...);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  obj.m_destruct = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> obj;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedObject.html#a08fda6ddde26e0a10170efaf07232761"> 74</a></span>  <span class="keyword">static</span> <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a> <a class="code" href="classwinapi_1_1SharedObject.html#a08fda6ddde26e0a10170efaf07232761">open</a>(<span class="keyword">const</span> std::string& name) {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a> obj{<a class="code" href="classwinapi_1_1SharedMemory.html#a82eafb0e7c2c6b5af1a7ff8945af2027">SharedMemory::open</a>(name)};</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">return</span> obj;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  }</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>(<a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>&& other) noexcept = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>& operator=(<span class="keyword">const</span> <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>& other) noexcept = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>(<span class="keyword">const</span> <a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  ~<a class="code" href="classwinapi_1_1SharedObject.html">SharedObject</a>() {</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span> (m_destruct && <a class="code" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">ptr</a>()) {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">ptr</a>()->~T();</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  </div>
<div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a"> 90</a></span>  T* <a class="code" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">ptr</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast<</span>T*<span class="keyword">></span>(m_shmem.<a class="code" href="classwinapi_1_1SharedMemory.html#a44e75ba35ae3e470fb521f6274991673">ptr</a>()); }</div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="classwinapi_1_1SharedObject.html#a85d0943708ab0da78e1a189b1bbbd1eb"> 92</a></span>  T& <a class="code" href="classwinapi_1_1SharedObject.html#a85d0943708ab0da78e1a189b1bbbd1eb">get</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *<a class="code" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">ptr</a>(); }</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  T* operator->()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">ptr</a>(); }</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  T& operator*()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classwinapi_1_1SharedObject.html#a85d0943708ab0da78e1a189b1bbbd1eb">get</a>(); }</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">explicit</span> SharedObject(SharedMemory&& shmem) : m_shmem(std::move(shmem)) {}</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  SharedMemory m_shmem;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// Destruct only once, no matter the number of mappings.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">bool</span> m_destruct = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> };</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> } <span class="comment">// namespace winapi</span></div>
<div class="ttc" id="aclasswinapi_1_1SharedMemory_html"><div class="ttname"><a href="classwinapi_1_1SharedMemory.html">winapi::SharedMemory</a></div><div class="ttdoc">Named shared memory region.</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00019">shmem.hpp:19</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedMemory_html_a44e75ba35ae3e470fb521f6274991673"><div class="ttname"><a href="classwinapi_1_1SharedMemory.html#a44e75ba35ae3e470fb521f6274991673">winapi::SharedMemory::ptr</a></div><div class="ttdeci">void * ptr() const</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00036">shmem.hpp:36</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedMemory_html_a475d4dcdf99d777cb0968d7631cc6f7e"><div class="ttname"><a href="classwinapi_1_1SharedMemory.html#a475d4dcdf99d777cb0968d7631cc6f7e">winapi::SharedMemory::create</a></div><div class="ttdeci">static SharedMemory create(const std::string &name, std::size_t nb)</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8cpp_source.html#l00040">shmem.cpp:40</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedMemory_html_a82eafb0e7c2c6b5af1a7ff8945af2027"><div class="ttname"><a href="classwinapi_1_1SharedMemory.html#a82eafb0e7c2c6b5af1a7ff8945af2027">winapi::SharedMemory::open</a></div><div class="ttdeci">static SharedMemory open(const std::string &name)</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8cpp_source.html#l00059">shmem.cpp:59</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedMemory_html_ada3f0075608dd1541f54f004e18a4775"><div class="ttname"><a href="classwinapi_1_1SharedMemory.html#ada3f0075608dd1541f54f004e18a4775">winapi::SharedMemory::get</a></div><div class="ttdeci">void * get() const</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00034">shmem.hpp:34</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedObject_html"><div class="ttname"><a href="classwinapi_1_1SharedObject.html">winapi::SharedObject</a></div><div class="ttdoc">Easy way to represent a C++ object as a shared memory region.</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00053">shmem.hpp:53</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedObject_html_a08fda6ddde26e0a10170efaf07232761"><div class="ttname"><a href="classwinapi_1_1SharedObject.html#a08fda6ddde26e0a10170efaf07232761">winapi::SharedObject::open</a></div><div class="ttdeci">static SharedObject open(const std::string &name)</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00074">shmem.hpp:74</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedObject_html_a0dfaad2c143d60af8dc6c010a13d513a"><div class="ttname"><a href="classwinapi_1_1SharedObject.html#a0dfaad2c143d60af8dc6c010a13d513a">winapi::SharedObject::ptr</a></div><div class="ttdeci">T * ptr() const</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00090">shmem.hpp:90</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedObject_html_a85d0943708ab0da78e1a189b1bbbd1eb"><div class="ttname"><a href="classwinapi_1_1SharedObject.html#a85d0943708ab0da78e1a189b1bbbd1eb">winapi::SharedObject::get</a></div><div class="ttdeci">T & get() const</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00092">shmem.hpp:92</a></div></div>
<div class="ttc" id="aclasswinapi_1_1SharedObject_html_acb4ef5283256d7463fe81c8b312b6745"><div class="ttname"><a href="classwinapi_1_1SharedObject.html#acb4ef5283256d7463fe81c8b312b6745">winapi::SharedObject::create</a></div><div class="ttdeci">static SharedObject create(const std::string &name, Args &&... args)</div><div class="ttdef"><b>Definition:</b> <a href="shmem_8hpp_source.html#l00063">shmem.hpp:63</a></div></div>
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