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<div class="refentry">
<a name="boost.dll.experimental.smart_library"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Class smart_library</span></h2>
<p>boost::dll::experimental::smart_library — This class is an extension of <a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a>, which allows to load C++ symbols. </p>
</div>
<h2 class="refsynopsisdiv-title">Synopsis</h2>
<div class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../boost_dll/reference.html#header.boost.dll.smart_library_hpp" title="Header <boost/dll/smart_library.hpp>">boost/dll/smart_library.hpp</a>>
</span>
<span class="keyword">class</span> <a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.dll.experimental.smart_library.mangled_storage"></a><span class="identifier">mangled_storage</span><span class="special">;</span>
<span class="comment">// <a class="link" href="smart_library.html#boost.dll.experimental.smart_libraryconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="smart_library.html#idm5384-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="smart_library.html#idm5393-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="../../container/deque.html#idm5410-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="smart_library.html#idm5431-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<a class="link" href="smart_library.html#idm5438-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="smart_library.html#idm5452-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="../../container/deque.html#idm5466-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="smart_library.html#idm5480-bb"><span class="identifier">smart_library</span></a><span class="special">(</span><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="smart_library.html#idm5494-bb"><span class="special">~</span><span class="identifier">smart_library</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="smart_library.html#idm5088-bb">public member functions</a></span>
<span class="keyword">const</span> <a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a class="link" href="smart_library.html#idm5089-bb"><span class="identifier">shared_lib</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">const</span> <span class="identifier">mangled_storage</span> <span class="special">&</span> <a class="link" href="smart_library.html#idm5095-bb"><span class="identifier">symbol_storage</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">mangled_storage</span> <span class="special">&</span> <a class="link" href="smart_library.html#idm5103-bb"><span class="identifier">symbol_storage</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="smart_library.html#idm5106-bb"><span class="identifier">load</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="smart_library.html#idm5125-bb"><span class="identifier">load</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="smart_library.html#idm5148-bb"><span class="identifier">load</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> <span class="identifier">T</span> <span class="special">&</span> <a class="link" href="smart_library.html#idm5156-bb"><span class="identifier">get_variable</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Func<span class="special">></span> <span class="identifier">Func</span> <span class="special">&</span> <a class="link" href="smart_library.html#idm5177-bb"><span class="identifier">get_function</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">,</span> <span class="keyword">typename</span> Func<span class="special">></span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="smart_library.html#idm5201-bb"><span class="identifier">get_mem_fn</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Signature<span class="special">></span>
<span class="identifier">constructor</span><span class="special"><</span> <span class="identifier">Signature</span> <span class="special">></span> <a class="link" href="smart_library.html#idm5229-bb"><span class="identifier">get_constructor</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">></span> <span class="identifier">destructor</span><span class="special"><</span> <span class="identifier">Class</span> <span class="special">></span> <a class="link" href="smart_library.html#idm5247-bb"><span class="identifier">get_destructor</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">></span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">type_info</span> <span class="special">&</span> <a class="link" href="smart_library.html#idm5265-bb"><span class="identifier">get_type_info</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Alias<span class="special">></span> <span class="keyword">void</span> <a class="link" href="smart_library.html#idm5283-bb"><span class="identifier">add_type_alias</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="smart_library.html#idm5301-bb"><span class="identifier">unload</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="smart_library.html#idm5311-bb"><span class="identifier">is_loaded</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="smart_library.html#idm5321-bb"><span class="keyword">operator</span><span class="special">!</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">explicit</span> <a class="link" href="smart_library.html#idm5331-bb"><span class="keyword">operator</span> <span class="keyword">bool</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="smart_library.html#idm5336-bb"><span class="identifier">has</span></a><span class="special">(</span><span class="keyword">const</span> <span class="keyword">char</span> <span class="special">*</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="smart_library.html#idm5351-bb"><span class="identifier">has</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span> <a class="link" href="smart_library.html#idm5355-bb"><span class="identifier">assign</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="smart_library.html#idm5371-bb"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="id-1.3.13.8.2.8.5.4"></a><h2>Description</h2>
<p>This class allows type safe loading of overloaded functions, member-functions, constructors and variables. It also allows to overwrite classes so they can be loaded, while being declared with different names.</p>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>Is still very experimental.</p></td></tr>
</table></div>
<p>
Currently known limitations:</p>
<p>Member functions must be defined outside of the class to be exported. That is: </p>
<pre class="programlisting"><span class="comment">//not exported:</span>
<span class="keyword">struct</span> <span class="identifier">BOOST_SYMBOL_EXPORT</span> <span class="identifier">my_class</span> <span class="special">{</span> <span class="keyword">void</span> <span class="identifier">func</span><span class="special">(</span><span class="special">)</span> <span class="special">{</span><span class="special">}</span><span class="special">}</span><span class="special">;</span>
<span class="comment">//exported</span>
<span class="keyword">struct</span> <span class="identifier">BOOST_SYMBOL_EXPORT</span> <span class="identifier">my_class</span> <span class="special">{</span> <span class="keyword">void</span> <span class="identifier">func</span><span class="special">(</span><span class="special">)</span><span class="special">;</span><span class="special">}</span><span class="special">;</span>
<span class="keyword">void</span> <span class="identifier">my_class</span><span class="special">::</span><span class="identifier">func</span><span class="special">(</span><span class="special">)</span> <span class="special">{</span><span class="special">}</span><span class="special">;</span>
</pre>
<p>With the current analysis, the first version does get exported in MSVC. MinGW also does export it, BOOST_SYMBOL_EXPORT is written before it. To allow this on windows one can use BOOST_DLL_MEMBER_EXPORT for this, so that MinGW and MSVC can provide those functions. This does however not work with gcc on linux.</p>
<p>Direct initialization of members. On linux the following member variable i will not be initialized when using the allocating constructor: </p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">BOOST_SYMBOL_EXPORT</span> <span class="identifier">my_class</span> <span class="special">{</span> <span class="keyword">int</span> <span class="identifier">i</span><span class="special">;</span> <span class="identifier">my_class</span><span class="special">(</span><span class="special">)</span> <span class="special">:</span> <span class="identifier">i</span><span class="special">(</span><span class="number">42</span><span class="special">)</span> <span class="special">{</span><span class="special">}</span> <span class="special">}</span><span class="special">;</span>
</pre>
<p>This does however not happen when the value is set inside the constructor function. </p>
<div class="refsect2">
<a name="id-1.3.13.8.2.8.5.4.8"></a><h3>
<a name="boost.dll.experimental.smart_libraryconstruct-copy-destruct"></a><code class="computeroutput">smart_library</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a name="idm5384-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Creates in anstance that does not reference any DLL/DSO.</p>
<p>
ifile "/root/project/libs/dll/include/boost/dll/smart_library.hpp" </p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>this->is_loaded() returns false. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm5393-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span></pre>
<p>Loads a library by specified path with a specified mode.</p>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link>, std::bad_alloc in case of insufficient memory. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">lib_path</code></span></p></td>
<td><p>Library file name. Can handle std::string, const char*, std::wstring, const wchar_t* or <a class="link" href="../fs/path.html" title="Type definition path">boost::dll::fs::path</a>. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mode</code></span></p></td>
<td><p>A mode that will be used on library load. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm5410-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span></pre>
<p>Loads a library by specified path with a specified mode.</p>
<p>
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ec</code></span></p></td>
<td><p>Variable that will be set to the result of the operation. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">lib_path</code></span></p></td>
<td><p>Library file name. Can handle std::string, const char*, std::wstring, const wchar_t* or <a class="link" href="../fs/path.html" title="Type definition path">boost::dll::fs::path</a>. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mode</code></span></p></td>
<td><p>A mode that will be used on library load. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>std::bad_alloc in case of insufficient memory.</td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem"><pre class="literallayout"><a name="idm5431-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode<span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><a name="idm5438-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span> lib<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>copy a <code class="computeroutput"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a></code> object.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">lib</code></span></p></td>
<td><p>A <code class="computeroutput"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a></code> to move from.</p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm5452-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&&</span> lib<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Move a <code class="computeroutput"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a></code> object.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">lib</code></span></p></td>
<td><p>A <code class="computeroutput"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a></code> to move from.</p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm5466-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> lib<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Construct from a <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code> object.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">lib</code></span></p></td>
<td><p>A <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code> to move from.</p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm5480-bb"></a><span class="identifier">smart_library</span><span class="special">(</span><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&&</span> lib<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Construct from a <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code> object.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">lib</code></span></p></td>
<td><p>A <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code> to move from.</p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm5494-bb"></a><span class="special">~</span><span class="identifier">smart_library</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Destroys the <code class="computeroutput"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a></code>. <code class="computeroutput">unload()</code> is called if the DLL/DSO was loaded. If library was loaded multiple times by different instances of <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code>, the actual DLL/DSO won't be unloaded until there is at least one instance of <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code>.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr></tbody>
</table></div>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="id-1.3.13.8.2.8.5.4.9"></a><h3>
<a name="idm5088-bb"></a><code class="computeroutput">smart_library</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">const</span> <a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a name="idm5089-bb"></a><span class="identifier">shared_lib</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Get the underlying <code class="computeroutput"><a class="link" href="../shared_library.html" title="Class shared_library">shared_library</a></code> </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">const</span> <span class="identifier">mangled_storage</span> <span class="special">&</span> <a name="idm5095-bb"></a><span class="identifier">symbol_storage</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Access to the mangled storage, which is created on construction.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">mangled_storage</span> <span class="special">&</span> <a name="idm5103-bb"></a><span class="identifier">symbol_storage</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Overload, for current development. </li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm5106-bb"></a><span class="identifier">load</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span></pre>
<p>Loads a library by specified path with a specified mode.</p>
<p>Note that if some library is already loaded in this instance, load will call unload() and then load the new provided library.</p>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link>, std::bad_alloc in case of insufficient memory. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">lib_path</code></span></p></td>
<td><p>Library file name. Can handle std::string, const char*, std::wstring, const wchar_t* or <a class="link" href="../fs/path.html" title="Type definition path">boost::dll::fs::path</a>. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mode</code></span></p></td>
<td><p>A mode that will be used on library load. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm5125-bb"></a><span class="identifier">load</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">,</span>
<span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode <span class="special">=</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">default_mode</span><span class="special">)</span><span class="special">;</span></pre>
<p>Loads a library by specified path with a specified mode.</p>
<p>Note that if some library is already loaded in this instance, load will call unload() and then load the new provided library.</p>
<p>
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ec</code></span></p></td>
<td><p>Variable that will be set to the result of the operation. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">lib_path</code></span></p></td>
<td><p>Library file name. Can handle std::string, const char*, std::wstring, const wchar_t* or <a class="link" href="../fs/path.html" title="Type definition path">boost::dll::fs::path</a>. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mode</code></span></p></td>
<td><p>A mode that will be used on library load. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>std::bad_alloc in case of insufficient memory.</td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem"><pre class="literallayout"><span class="keyword">void</span> <a name="idm5148-bb"></a><span class="identifier">load</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">path</span> <span class="special">&</span> lib_path<span class="special">,</span> <span class="identifier">load_mode</span><span class="special">::</span><span class="identifier">type</span> mode<span class="special">,</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">dll</span><span class="special">::</span><span class="identifier">fs</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> <span class="identifier">T</span> <span class="special">&</span> <a name="idm5156-bb"></a><span class="identifier">get_variable</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load a variable from the referenced library.</p>
<p>Unlinke shared_library::get this function will also load scoped variables, which also includes static class members.</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>When mangled, MSVC will also check the type.</p></td></tr>
</table></div>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
<td><p>Name of the variable </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">T</code></span></p></td>
<td><p>Type of the variable </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A reference to the variable of type T.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Func<span class="special">></span> <span class="identifier">Func</span> <span class="special">&</span> <a name="idm5177-bb"></a><span class="identifier">get_function</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load a function from the referenced library.</p>
<p><span class="bold"><strong>Example:</strong></span> </p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="keyword">int</span> <span class="special">(</span><span class="special">&</span><span class="identifier">add_ints</span><span class="special">)</span><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="keyword">double</span> <span class="special">(</span><span class="special">&</span><span class="identifier">add_doubles</span><span class="special">)</span><span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">add_ints</span> <span class="identifier">f1</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_function</span><span class="special"><</span><span class="keyword">int</span><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">></span> <span class="special">(</span><span class="string">"func_name"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">add_doubles</span> <span class="identifier">f2</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_function</span><span class="special"><</span><span class="keyword">double</span><span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">double</span><span class="special">)</span><span class="special">></span><span class="special">(</span><span class="string">"func_name"</span><span class="special">)</span><span class="special">;</span>
</pre>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>When mangled, MSVC will also check the return type.</p></td></tr>
</table></div>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
<td><p>Name of the function. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">Func</code></span></p></td>
<td><p>Type of the function, required for determining the overload </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A reference to the function of type F.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">,</span> <span class="keyword">typename</span> Func<span class="special">></span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="idm5201-bb"></a><span class="identifier">get_mem_fn</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load a member-function from the referenced library.</p>
<p><span class="bold"><strong>Example</strong></span> (import class is MyClass, which is available inside the library and the host):</p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="keyword">int</span> <span class="identifier">MyClass</span><span class="special">(</span><span class="special">*</span><span class="identifier">func</span><span class="special">)</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">typedef</span> <span class="keyword">int</span> <span class="identifier">MyClass</span><span class="special">(</span><span class="special">*</span><span class="identifier">func_const</span><span class="special">)</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">add_ints</span> <span class="identifier">f1</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_mem_fn</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">,</span> <span class="keyword">int</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span><span class="special">></span> <span class="special">(</span><span class="string">"MyClass::function"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">add_doubles</span> <span class="identifier">f2</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_mem_fn</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">MyClass</span><span class="special">,</span> <span class="keyword">double</span><span class="special">(</span><span class="keyword">double</span><span class="special">)</span><span class="special">></span><span class="special">(</span><span class="string">"MyClass::function"</span><span class="special">)</span><span class="special">;</span>
</pre>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>When mangled, MSVC will also check the return type.</p></td></tr>
</table></div>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
<td><p>Name of the function. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">Class</code></span></p></td>
<td><p>The class the function is a member of. If Class is const, the function will be assumed as taking a const this-pointer. The same applies for volatile. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">Func</code></span></p></td>
<td><p>Signature of the function, required for determining the overload </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A pointer to the member-function with the signature provided</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Signature<span class="special">></span> <span class="identifier">constructor</span><span class="special"><</span> <span class="identifier">Signature</span> <span class="special">></span> <a name="idm5229-bb"></a><span class="identifier">get_constructor</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load a constructor from the referenced library.</p>
<p><span class="bold"><strong>Example</strong></span> (import class is MyClass, which is available inside the library and the host):</p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">constructor</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="identifier">f1</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_mem_fn</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span><span class="special">></span><span class="special">(</span><span class="special">)</span><span class="special">;</span>
</pre>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">Signature</code></span></p></td>
<td><p>Signature of the function, required for determining the overload. The return type is the class which this is the constructor of. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A constructor object.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">></span> <span class="identifier">destructor</span><span class="special"><</span> <span class="identifier">Class</span> <span class="special">></span> <a name="idm5247-bb"></a><span class="identifier">get_destructor</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load a destructor from the referenced library.</p>
<p><span class="bold"><strong>Example</strong></span> (import class is MyClass, which is available inside the library and the host):</p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">destructor</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">></span> <span class="identifier">f1</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_mem_fn</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">></span><span class="special">(</span><span class="special">)</span><span class="special">;</span>
</pre>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">Class</code></span></p></td>
<td><p>The class whose destructor shall be loaded </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A destructor object.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Class<span class="special">></span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">type_info</span> <span class="special">&</span> <a name="idm5265-bb"></a><span class="identifier">get_type_info</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Load the typeinfo of the given type.</p>
<p><span class="bold"><strong>Example</strong></span> (import class is MyClass, which is available inside the library and the host):</p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">type_info</span> <span class="special">&</span><span class="identifier">ti</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_Type_info</span><span class="special"><</span><span class="identifier">MyClass</span><span class="special">></span><span class="special">(</span><span class="special">)</span><span class="special">;</span>
</pre>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link> if symbol does not exist or if the DLL/DSO was not loaded. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Template Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">Class</code></span></p></td>
<td><p>The class whose typeinfo shall be loaded </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A reference to a type_info object.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Alias<span class="special">></span> <span class="keyword">void</span> <a name="idm5283-bb"></a><span class="identifier">add_type_alias</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> name<span class="special">)</span><span class="special">;</span></pre>
<p>This function can be used to add a type alias.</p>
<p>This is to be used, when a class shall be imported, which is not declared on the host side.</p>
<p>Example: </p>
<pre class="programlisting"><span class="identifier">smart_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.so"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">lib</span><span class="special">.</span><span class="identifier">add_type_alias</span><span class="special"><</span><span class="identifier">MyAlias</span><span class="special">></span><span class="special">(</span><span class="string">"MyClass"</span><span class="special">)</span><span class="special">;</span> <span class="comment">//when using MyAlias, the library will look for MyClass</span>
<span class="comment">//get the destructor of MyClass</span>
<span class="identifier">destructor</span><span class="special"><</span><span class="identifier">MyAlias</span><span class="special">></span> <span class="identifier">dtor</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_destructor</span><span class="special"><</span><span class="identifier">MyAlias</span><span class="special">></span><span class="special">(</span><span class="special">)</span><span class="special">;</span>
</pre>
<p>
</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>If the alias-type is not large enough for the imported class, it will result in undefined behaviour. </p></td></tr>
</table></div>
<p>
</p>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>The alias will only be applied for the type signature, it will not replace the token in the scoped name. </p></td></tr>
</table></div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">name</code></span></p></td>
<td><p>Name of the class the alias is for.</p></td>
</tr></tbody>
</table></div></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm5301-bb"></a><span class="identifier">unload</span><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Unloads a shared library. If library was loaded multiple times by different instances, the actual DLL/DSO won't be unloaded until there is at least one instance that references the DLL/DSO.</p>
<p>
ifile "/root/project/libs/dll/include/boost/dll/smart_library.hpp" </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>this->is_loaded() returns false. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm5311-bb"></a><span class="identifier">is_loaded</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Check if an library is loaded.</p>
<p>
ifile "/root/project/libs/dll/include/boost/dll/smart_library.hpp" </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>true if a library has been loaded. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm5321-bb"></a><span class="keyword">operator</span><span class="special">!</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Check if an library is not loaded.</p>
<p>
ifile "/root/project/libs/dll/include/boost/dll/smart_library.hpp" </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>true if a library has not been loaded. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm5331-bb"></a><span class="keyword">operator</span> <span class="keyword">bool</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>bool() const <p>bool() const </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm5336-bb"></a><span class="identifier">has</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">char</span> <span class="special">*</span> symbol_name<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Search for a given symbol on loaded library. Works for all symbols, including alias names.</p>
<p>
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">symbol_name</code></span></p></td>
<td><p>Null-terminated symbol name. Can handle std::string, char*, const char*. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p><code class="computeroutput">true</code> if the loaded library contains a symbol with a given name. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm5351-bb"></a><span class="identifier">has</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="special">&</span> symbol_name<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre></li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span> <a name="idm5355-bb"></a><span class="identifier">assign</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span> lib<span class="special">)</span><span class="special">;</span></pre>
<p>Makes *this share the same shared object as lib. If *this is loaded, then unloads it.</p>
<p>
xmlonly <link linkend='boost.dll.fs.system_error'>boost::dll::fs::system_error</link>, std::bad_alloc in case of insufficient memory. </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">lib</code></span></p></td>
<td><p>A library instance to assign from. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib.location() == this->location() </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td> </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm5371-bb"></a><span class="identifier">swap</span><span class="special">(</span><a class="link" href="smart_library.html" title="Class smart_library">smart_library</a> <span class="special">&</span> rhs<span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
<p>Swaps two libraries. Does not invalidate existing symbols and functions loaded from libraries.</p>
<p>
ifile "/root/project/libs/dll/include/boost/dll/smart_library.hpp" </p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">rhs</code></span></p></td>
<td><p>Library to swap with. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
</ol></div>
</div>
</div>
</div>
<div class="copyright-footer">Copyright © 2014 Renato Tegon Forti, Antony Polukhin<br>Copyright © 2015 Antony Polukhin<br>Copyright © 2016 Antony Polukhin, Klemens Morgenstern<br>Copyright © 2017-2023 Antony Polukhin<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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