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<a name="boost.dll.shared_library"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Class shared_library</span></h2>
<p>boost::dll::shared_library — This class can be used to load a Dynamic link libraries (DLL's) or Shared Libraries, also know as dynamic shared objects (DSO's) and get their exported symbols (functions and variables). </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../boost_dll/reference.html#header.boost.dll.shared_library_hpp" title="Header <boost/dll/shared_library.hpp>">boost/dll/shared_library.hpp</a>>
</span>
<span class="keyword">class</span> <a class="link" href="shared_library.html" title="Class shared_library">shared_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="identifier">platform_specific</span> <a name="boost.dll.shared_library.native_handle_t"></a><span class="identifier">native_handle_t</span><span class="special">;</span>
<span class="comment">// <a class="link" href="shared_library.html#boost.dll.shared_libraryconstruct-copy-destruct">construct/copy/destruct</a></span>
<a class="link" href="shared_library.html#idm45899629204784-bb"><span class="identifier">shared_library</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span>
<a class="link" href="shared_library.html#idm45899629202336-bb"><span class="identifier">shared_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="special">;</span>
<a class="link" href="shared_library.html#idm45899629198096-bb"><span class="identifier">shared_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="identifier">boost</span><span class="special">::</span><span class="identifier">system</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="shared_library.html#idm45899629192688-bb"><span class="identifier">shared_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>
<span class="keyword">explicit</span> <a class="link" href="shared_library.html#idm45899629188784-bb"><span class="identifier">shared_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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="shared_library.html#idm45899629184096-bb"><span class="identifier">shared_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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">system</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="shared_library.html#idm45899629178528-bb"><span class="identifier">shared_library</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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">system</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="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a class="link" href="shared_library.html#idm45899629175600-bb"><span class="keyword">operator</span><span class="special">=</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="special">;</span>
<a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a class="link" href="shared_library.html#idm45899629171184-bb"><span class="keyword">operator</span><span class="special">=</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="shared_library.html#idm45899629166672-bb"><span class="special">~</span><span class="identifier">shared_library</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// <a class="link" href="shared_library.html#idm45899629294816-bb">public member functions</a></span>
<a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a class="link" href="shared_library.html#idm45899629294256-bb"><span class="identifier">assign</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="identifier">boost</span><span class="special">::</span><span class="identifier">system</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="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a class="link" href="shared_library.html#idm45899629288464-bb"><span class="identifier">assign</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="special">;</span>
<span class="keyword">void</span> <a class="link" href="shared_library.html#idm45899629283824-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">filesystem</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="shared_library.html#idm45899629278448-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">filesystem</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">system</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="shared_library.html#idm45899629271920-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">filesystem</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">system</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">void</span> <a class="link" href="shared_library.html#idm45899629268432-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="shared_library.html#idm45899629265296-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="shared_library.html#idm45899629262320-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="shared_library.html#idm45899629259344-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="shared_library.html#idm45899629256096-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="shared_library.html#idm45899629251568-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>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">enable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a class="link" href="shared_library.html#idm45899629249216-bb"><span class="identifier">get</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> T<span class="special">></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">disable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a class="link" href="shared_library.html#idm45899629241056-bb"><span class="identifier">get</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> T<span class="special">></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">enable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a class="link" href="shared_library.html#idm45899629237776-bb"><span class="identifier">get</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="special">;</span>
<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">disable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a class="link" href="shared_library.html#idm45899629234496-bb"><span class="identifier">get</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="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="shared_library.html#idm45899629231216-bb"><span class="identifier">get_alias</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="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="shared_library.html#idm45899629224608-bb"><span class="identifier">get_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="keyword">const</span><span class="special">;</span>
<span class="identifier">native_handle_t</span> <a class="link" href="shared_library.html#idm45899629221408-bb"><span class="identifier">native</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="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a class="link" href="shared_library.html#idm45899629219120-bb"><span class="identifier">location</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a class="link" href="shared_library.html#idm45899629214608-bb"><span class="identifier">location</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="keyword">void</span> <a class="link" href="shared_library.html#idm45899629208944-bb"><span class="identifier">swap</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>
<span class="comment">// <a class="link" href="shared_library.html#idm45899629164368-bb">public static functions</a></span>
<span class="keyword">static</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a class="link" href="shared_library.html#idm45899629163808-bb"><span class="identifier">suffix</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm45928055232576"></a><h2>Description</h2>
<p><a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> instances share reference count to an actual loaded DLL/DSO, so it is safe and memory efficient to have multiple instances of <a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> referencing the same DLL/DSO even if those instances were loaded using different paths (relative + absolute) referencing the same object.</p>
<p>On Linux/POSIX link with library "dl". "-fvisibility=hidden" flag is also recommended for use on Linux/POSIX. </p>
<div class="refsect2">
<a name="idm45928055229632"></a><h3>
<a name="boost.dll.shared_libraryconstruct-copy-destruct"></a><code class="computeroutput">shared_library</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a name="idm45899629204784-bb"></a><span class="identifier">shared_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>
</p>
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<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="idm45899629202336-bb"></a><span class="identifier">shared_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="special">;</span></pre>
<p>Copy constructor that increments the reference count of an underlying shared library. Same as calling constructor with <code class="computeroutput">lib.location()</code> parameter.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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<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 to copy. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib == *this </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>boost::system::system_error in case of insufficient memory. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm45899629198096-bb"></a><span class="identifier">shared_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="identifier">boost</span><span class="special">::</span><span class="identifier">system</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>
<p>Copy constructor that increments the reference count of an underlying shared library. Same as calling constructor with <code class="computeroutput">lib.location(), ec</code> parameters.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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<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>
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<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</code></span></p></td>
<td><p>A shared library to copy. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib == *this </p></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="idm45899629192688-bb"></a><span class="identifier">shared_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>Move constructor. Does not invalidate existing symbols and functions loaded from lib.</p>
<p>
</p>
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<col align="left" valign="top">
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<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 shared library to move from. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib.is_loaded() returns false, this->is_loaded() return true. </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="idm45899629188784-bb"></a><span class="identifier">shared_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
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<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 boost::filesystem::path. </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>boost::system::system_error in case of insufficient memory. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a name="idm45899629184096-bb"></a><span class="identifier">shared_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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">system</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>
</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 boost::filesystem::path. </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="idm45899629178528-bb"></a><span class="identifier">shared_library</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</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">system</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>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a name="idm45899629175600-bb"></a><span class="keyword">operator</span><span class="special">=</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="special">;</span></pre>
<p>Assignment operator. If this->is_loaded() then calls this->unload(). Does not invalidate existing symbols and functions loaded from lib.</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 shared library to assign from. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib == *this </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>boost::system::system_error in case of insufficient memory. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a name="idm45899629171184-bb"></a><span class="keyword">operator</span><span class="special">=</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>Move assignment operator. If this->is_loaded() then calls this->unload(). Does not invalidate existing symbols and functions loaded from lib.</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 library to move from. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib.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="idm45899629166672-bb"></a><span class="special">~</span><span class="identifier">shared_library</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Destroys the object by calling <code class="computeroutput">unload()</code>. 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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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</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="idm45928055088528"></a><h3>
<a name="idm45899629294816-bb"></a><code class="computeroutput">shared_library</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><a class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span>
<a name="idm45899629294256-bb"></a><span class="identifier">assign</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="identifier">boost</span><span class="special">::</span><span class="identifier">system</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>
<p>Makes *this share the same shared object as lib. If *this is loaded, then unloads it.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
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<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</code></span></p></td>
<td><p>A library to copy. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Postconditions:</span></p></td>
<td><p>lib.location() == this->location(), lib == *this </p></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 class="link" href="shared_library.html" title="Class shared_library">shared_library</a> <span class="special">&</span> <a name="idm45899629288464-bb"></a><span class="identifier">assign</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="special">;</span></pre>
<p>Makes *this share the same shared object as lib. If *this is loaded, then unloads it.</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<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>boost::system::system_error in case of insufficient memory. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm45899629283824-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">filesystem</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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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<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>
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<tbody>
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<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 boost::filesystem::path. </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>boost::system::system_error in case of insufficient memory. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm45899629278448-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">filesystem</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">system</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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<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 boost::filesystem::path. </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="idm45899629271920-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">filesystem</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">system</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>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm45899629268432-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>
</p>
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<tbody>
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<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="idm45899629265296-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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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<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="idm45899629262320-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>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
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<col align="left" valign="top">
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<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="idm45899629259344-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>
<p>Check if an library is loaded.</p>
<p>
</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">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="idm45899629256096-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>
</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="idm45899629251568-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>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</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">boost</span><span class="special">::</span><span class="identifier">enable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a name="idm45899629249216-bb"></a><span class="identifier">get</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="special">;</span></pre>
<p>Returns reference to the symbol (function or variable) with the given name from the loaded library. This call will always succeed and throw nothing if call to <code class="computeroutput">has(const char* )</code> member function with the same symbol name returned <code class="computeroutput">true</code>.</p>
<p><span class="bold"><strong>Example:</strong></span> </p>
<pre class="programlisting"><span class="keyword">int</span><span class="special">&</span> <span class="identifier">i0</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span><span class="special">(</span><span class="string">"integer_name"</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">int</span><span class="special">&</span> <span class="identifier">i1</span> <span class="special">=</span> <span class="special">*</span><span class="identifier">lib</span><span class="special">.</span><span class="identifier">get</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">"integer_alias_name"</span><span class="special">)</span><span class="special">;</span>
</pre>
<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">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">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 symbol that we are going to import. Must be explicitly specified. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>Reference to the symbol. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>boost::system::system_error if symbol does not exist or if the DLL/DSO was not loaded. </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> T<span class="special">></span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">disable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a name="idm45899629241056-bb"></a><span class="identifier">get</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="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</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">boost</span><span class="special">::</span><span class="identifier">enable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a name="idm45899629237776-bb"></a><span class="identifier">get</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="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</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">boost</span><span class="special">::</span><span class="identifier">disable_if_c</span><span class="special"><</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_member_pointer</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">||</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">is_reference</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span><span class="special">::</span><span class="identifier">value</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span>
<a name="idm45899629234496-bb"></a><span class="identifier">get</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="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</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="idm45899629231216-bb"></a><span class="identifier">get_alias</span><span class="special">(</span><span class="keyword">const</span> <span class="keyword">char</span> <span class="special">*</span> alias_name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns a symbol (function or variable) from a shared library by alias name of the symbol.</p>
<p><span class="bold"><strong>Example:</strong></span> </p>
<pre class="programlisting"><span class="keyword">int</span><span class="special">&</span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">get_alias</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span><span class="special">(</span><span class="string">"integer_alias_name"</span><span class="special">)</span><span class="special">;</span>
</pre>
<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">alias_name</code></span></p></td>
<td><p>Null-terminated alias symbol name. Can handle std::string, char*, const char*. </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 symbol that we are going to import. Must be explicitly specified.. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>boost::system::system_error if symbol does not exist or if the DLL/DSO was not loaded. </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> T<span class="special">></span> <span class="identifier">T</span> <span class="special">&</span> <a name="idm45899629224608-bb"></a><span class="identifier">get_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> alias_name<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">native_handle_t</span> <a name="idm45899629221408-bb"></a><span class="identifier">native</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>Returns the native handler of the loaded library.</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">Returns:</span></p></td>
<td><p>Platform-specific handle. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a name="idm45899629219120-bb"></a><span class="identifier">location</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns full path and name of this shared object.</p>
<p><span class="bold"><strong>Example:</strong></span> </p>
<pre class="programlisting"><span class="identifier">shared_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.dll"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <span class="identifier">full_path</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">location</span><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="comment">// C:\Windows\System32\test_lib.dll</span>
</pre>
<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">Returns:</span></p></td>
<td><p>Full path to the shared library. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>boost::system::system_error </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a name="idm45899629214608-bb"></a><span class="identifier">location</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> ec<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Returns full path and name of shared module.</p>
<p><span class="bold"><strong>Example:</strong></span> </p>
<pre class="programlisting"><span class="identifier">shared_library</span> <span class="identifier">lib</span><span class="special">(</span><span class="string">"test_lib.dll"</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <span class="identifier">full_path</span> <span class="special">=</span> <span class="identifier">lib</span><span class="special">.</span><span class="identifier">location</span><span class="special">(</span><span class="special">)</span><span class="special">;</span> <span class="comment">// C:\Windows\System32\test_lib.dll</span>
</pre>
<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">ec</code></span></p></td>
<td><p>Variable that will be set to the result of the operation. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>Full path to the shared library. </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>std::bad_alloc. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">void</span> <a name="idm45899629208944-bb"></a><span class="identifier">swap</span><span class="special">(</span><a class="link" href="shared_library.html" title="Class shared_library">shared_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>
</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 class="refsect2">
<a name="idm45928054703584"></a><h3>
<a name="idm45899629164368-bb"></a><code class="computeroutput">shared_library</code> public static functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">filesystem</span><span class="special">::</span><span class="identifier">path</span> <a name="idm45899629163808-bb"></a><span class="identifier">suffix</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Returns suffix of shared module: in a call to load() or the constructor/load.</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">Returns:</span></p></td>
<td><p>The suffix od shared module: ".dll" (Windows), ".so" (Unix/Linux/BSD), ".dylib" (MacOS/IOS) </p></td>
</tr></tbody>
</table></div>
</li></ol></div>
</div>
</div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2014 Renato Tegon Forti, Antony Polukhin<br>Copyright © 2015 Antony Polukhin<br>Copyright © 2016 Antony Polukhin, Klemens Morgenstern<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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