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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<h1>sigc::internal::signal_impl Struct Reference</h1>Implementation of the signal interface.
<a href="#_details">More...</a>
<p>
<a href="structsigc_1_1internal_1_1signal__impl-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Types</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w0">size_type</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef std::list<<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w1">slot_list</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__iterator.html">slot_list::iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w2">iterator_type</a></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef <a class="el" href="structsigc_1_1slot__const__iterator.html">slot_list::const_iterator</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w3">const_iterator_type</a></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a0">signal_impl</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a1">reference</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Increments the reference counter. <a href="#a1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a2">reference_exec</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Increments the reference and execution counter. <a href="#a2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a3">unreference</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Decrements the reference counter. <a href="#a3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a4">unreference_exec</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Decrements the reference and execution counter. <a href="#a4"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a5">empty</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the list of slots is empty. <a href="#a5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a6">clear</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Empties the list of slots. <a href="#a6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w0">size_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a7">size</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the number of slots in the list. <a href="#a7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a8">connect</a> (const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& slot_)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the bottom of the list of slots. <a href="#a8"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a9">insert</a> (<a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> i, const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& slot_)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Adds a slot at the given position into the list of slots. <a href="#a9"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a10">erase</a> (<a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> i)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Removes the slot at the given position from the list of slots. <a href="#a10"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Removes invalid slots from the list of slots. <a href="#a11"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#e0">notify</a> (void* d)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Callback that is executed when some slot becomes invalid. <a href="#e0"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">short </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o0">ref_count_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Reference counter. <a href="#o0"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">short </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o1">exec_count_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Execution counter. <a href="#o1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o2">deferred_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Indicates whether the execution of <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> is being deferred. <a href="#o2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::list<<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o3">slots_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The list of slots. <a href="#o3"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Implementation of the signal interface.
<p>
<a class="el" href="structsigc_1_1internal_1_1signal__impl.html">signal_impl</a> manages a list of slots. When a slot becomes invalid (because some referred object dies), <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#e0">notify()</a> is executed. <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#e0">notify()</a> either calls <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> directly or defers the execution of <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> when the signal is being emitted. <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> removes all invalid slot from the list.
<p>
<hr><h2>Member Typedef Documentation</h2>
<a class="anchor" name="w3" doxytag="sigc::internal::signal_impl::const_iterator_type"></a><p>
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<td class="md" nowrap valign="top">typedef <a class="el" href="structsigc_1_1slot__const__iterator.html">slot_list::const_iterator</a> <a class="el" href="structsigc_1_1slot__const__iterator.html">sigc::internal::signal_impl::const_iterator_type</a> </td>
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<td class="md" nowrap valign="top">typedef <a class="el" href="structsigc_1_1slot__iterator.html">slot_list::iterator</a> <a class="el" href="structsigc_1_1slot__iterator.html">sigc::internal::signal_impl::iterator_type</a> </td>
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<a class="anchor" name="w0" doxytag="sigc::internal::signal_impl::size_type"></a><p>
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<td class="md" nowrap valign="top">typedef size_t <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w0">sigc::internal::signal_impl::size_type</a> </td>
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<td class="md" nowrap valign="top">typedef std::list<<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>> <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w1">sigc::internal::signal_impl::slot_list</a> </td>
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<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="a0" doxytag="sigc::internal::signal_impl::signal_impl"></a><p>
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<td class="md" nowrap valign="top">sigc::internal::signal_impl::signal_impl </td>
<td class="md" valign="top">(</td>
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<hr><h2>Member Function Documentation</h2>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::clear </td>
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Empties the list of slots.
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<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> sigc::internal::signal_impl::connect </td>
<td class="md" valign="top">(</td>
<td class="md" nowrap valign="top">const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& </td>
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Adds a slot at the bottom of the list of slots.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<dl compact><dt><b>Returns:</b></dt><dd>An iterator pointing to the new slot in the list. </dd></dl>
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Returns whether the list of slots is empty.
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<dl compact><dt><b>Returns:</b></dt><dd><code>true</code> if the list of slots is empty. </dd></dl>
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<a class="anchor" name="a10" doxytag="sigc::internal::signal_impl::erase"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> sigc::internal::signal_impl::erase </td>
<td class="md" valign="top">(</td>
<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> </td>
<td class="mdname1" valign="top" nowrap> <em>i</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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</td>
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<td>
</td>
<td>
<p>
Removes the slot at the given position from the list of slots.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>i</em> </td><td>An iterator pointing to the slot to be removed. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>An iterator pointing to the slot in the list after the one removed. </dd></dl>
</td>
</tr>
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<a class="anchor" name="a9" doxytag="sigc::internal::signal_impl::insert"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> sigc::internal::signal_impl::insert </td>
<td class="md" valign="top">(</td>
<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1slot__iterator.html">iterator_type</a> </td>
<td class="mdname" nowrap> <em>i</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const <a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& </td>
<td class="mdname" nowrap> <em>slot_</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
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</td>
</tr>
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<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Adds a slot at the given position into the list of slots.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>i</em> </td><td>An iterator indicating the position where <code>slot_</code> should be inserted. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>slot_</em> </td><td>The slot to add to the list of slots. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>An iterator pointing to the new slot in the list. </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="e0" doxytag="sigc::internal::signal_impl::notify"></a><p>
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<td class="md" nowrap valign="top">void* sigc::internal::signal_impl::notify </td>
<td class="md" valign="top">(</td>
<td class="md" nowrap valign="top">void* </td>
<td class="mdname1" valign="top" nowrap> <em>d</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [static]</code></td>
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</td>
</tr>
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<table cellspacing="5" cellpadding="0" border="0">
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<td>
</td>
<td>
<p>
Callback that is executed when some slot becomes invalid.
<p>
This callback is registered in every slot when inserted into the list of slots. It is executed when a slot becomes invalid because of some referred object being destroyed. It either calls <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> directly or defers the execution of <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> when the signal is being emitted. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>d</em> </td><td>The signal object (<code>this</code>). </td></tr>
</table>
</dl>
</td>
</tr>
</table>
<a class="anchor" name="a1" doxytag="sigc::internal::signal_impl::reference"></a><p>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::reference </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline]</code></td>
</tr>
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</td>
</tr>
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</td>
<td>
<p>
Increments the reference counter.
<p>
</td>
</tr>
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<a class="anchor" name="a2" doxytag="sigc::internal::signal_impl::reference_exec"></a><p>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::reference_exec </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline]</code></td>
</tr>
</table>
</td>
</tr>
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<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Increments the reference and execution counter.
<p>
</td>
</tr>
</table>
<a class="anchor" name="a7" doxytag="sigc::internal::signal_impl::size"></a><p>
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<td class="md" nowrap valign="top"><a class="el" href="structsigc_1_1internal_1_1signal__impl.html#w0">size_type</a> sigc::internal::signal_impl::size </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const</td>
</tr>
</table>
</td>
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<td>
</td>
<td>
<p>
Returns the number of slots in the list.
<p>
<dl compact><dt><b>Returns:</b></dt><dd>The number of slots in the list. </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="a11" doxytag="sigc::internal::signal_impl::sweep"></a><p>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::sweep </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Removes invalid slots from the list of slots.
<p>
</td>
</tr>
</table>
<a class="anchor" name="a3" doxytag="sigc::internal::signal_impl::unreference"></a><p>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::unreference </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Decrements the reference counter.
<p>
The object is deleted when the reference counter reaches zero. </td>
</tr>
</table>
<a class="anchor" name="a4" doxytag="sigc::internal::signal_impl::unreference_exec"></a><p>
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<td class="md" nowrap valign="top">void sigc::internal::signal_impl::unreference_exec </td>
<td class="md" valign="top">(</td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Decrements the reference and execution counter.
<p>
Invokes <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> if the execution counter reaches zero and the removal of one or more slots has been deferred. </td>
</tr>
</table>
<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="o2" doxytag="sigc::internal::signal_impl::deferred_"></a><p>
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<td class="md" nowrap valign="top">bool <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o2">sigc::internal::signal_impl::deferred_</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Indicates whether the execution of <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#a11">sweep()</a> is being deferred.
<p>
</td>
</tr>
</table>
<a class="anchor" name="o1" doxytag="sigc::internal::signal_impl::exec_count_"></a><p>
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<td class="md" nowrap valign="top">short <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o1">sigc::internal::signal_impl::exec_count_</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Execution counter.
<p>
Indicates whether the signal is being emitted. </td>
</tr>
</table>
<a class="anchor" name="o0" doxytag="sigc::internal::signal_impl::ref_count_"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
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<td class="md" nowrap valign="top">short <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o0">sigc::internal::signal_impl::ref_count_</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Reference counter.
<p>
The object is destroyed when <em>ref_count_</em> reaches zero. </td>
</tr>
</table>
<a class="anchor" name="o3" doxytag="sigc::internal::signal_impl::slots_"></a><p>
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<td class="md" nowrap valign="top">std::list<<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>> <a class="el" href="structsigc_1_1internal_1_1signal__impl.html#o3">sigc::internal::signal_impl::slots_</a> </td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
The list of slots.
<p>
</td>
</tr>
</table>
<hr>The documentation for this struct was generated from the following file:<ul>
<li><a class="el" href="signal__base_8h.html">signal_base.h</a></ul>
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