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<a class="el" href="a00428.html">tbb</a>::<a class="el" href="a00294.html">filter</a></div>
<h1>tbb::filter Class Reference<br>
<small>
[<a class="el" href="a00441.html">Algorithms</a>]</small>
</h1><!-- doxytag: class="tbb::filter" -->A stage in a pipeline.
<a href="#_details">More...</a>
<p>
<code>#include &lt;pipeline.h&gt;</code>
<p>
<p>Inheritance diagram for tbb::filter:
<p><center><img src="a00294.png" usemap="#tbb::filter_map" border="0" alt=""></center>
<map name="tbb::filter_map">
<area href="a00361.html" alt="tbb::thread_bound_filter" shape="rect" coords="0,56,145,80">
</map>
<a href="a00107.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="fcfec27656a69ff2072802ac001e936f"></a><!-- doxytag: member="tbb::filter::is_serial" ref="fcfec27656a69ff2072802ac001e936f" args="() const " -->
bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#fcfec27656a69ff2072802ac001e936f">is_serial</a> () const </td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">True if filter is serial. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cd53206c4795ef2df5df26b795caf692"></a><!-- doxytag: member="tbb::filter::is_ordered" ref="cd53206c4795ef2df5df26b795caf692" args="() const " -->
bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#cd53206c4795ef2df5df26b795caf692">is_ordered</a> () const </td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">True if filter must receive stream in order. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="15c29cae5d237e6d63dbfe5c94af89d5"></a><!-- doxytag: member="tbb::filter::is_bound" ref="15c29cae5d237e6d63dbfe5c94af89d5" args="() const " -->
bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#15c29cae5d237e6d63dbfe5c94af89d5">is_bound</a> () const </td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">True if filter is thread-bound. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8ec4dfe053e94a2349d56781ddea8477"></a><!-- doxytag: member="tbb::filter::object_may_be_null" ref="8ec4dfe053e94a2349d56781ddea8477" args="()" -->
bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#8ec4dfe053e94a2349d56781ddea8477">object_may_be_null</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">true if an input filter can emit null <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#fa1b3dc1f4f47563ccab7f4d92f5b543">operator()</a> (void *item)=0</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Operate on an item from the input stream, and return item for output stream. <a href="#fa1b3dc1f4f47563ccab7f4d92f5b543"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual __TBB_EXPORTED_METHOD&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#66d159f362293e3964ba3da8bc1d2604">~filter</a> ()</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Destroy filter. <a href="#66d159f362293e3964ba3da8bc1d2604"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#56275eb889c77c4807967133e21401bd">finalize</a> (void *)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Destroys item if pipeline was cancelled. <a href="#56275eb889c77c4807967133e21401bd"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="1edba30e1e64e82ee4b7c6f227825817"></a><!-- doxytag: member="tbb::filter::x1" ref="1edba30e1e64e82ee4b7c6f227825817" args="((is_serial_?serial:parallel)|exact_exception_propagation))" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>x1</b> ((is_serial_?serial:parallel)|<a class="el" href="a00294.html#f17200974c33be21f42a5f00893de028">exact_exception_propagation</a>))</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a06145c3e7ad273ece95eb8be642b0a2"></a><!-- doxytag: member="tbb::filter::prev_filter_in_pipeline" ref="a06145c3e7ad273ece95eb8be642b0a2" args="(not_in_pipeline())" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>prev_filter_in_pipeline</b> (not_in_pipeline())</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="7a54082a9165275bf7725970d756f132"></a><!-- doxytag: member="tbb::filter::my_pipeline" ref="7a54082a9165275bf7725970d756f132" args="(NULL)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>my_pipeline</b> (NULL)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d66d6e9e27b1be74fdb9c07f899d4837"></a><!-- doxytag: member="tbb::filter::next_segment" ref="d66d6e9e27b1be74fdb9c07f899d4837" args="(NULL)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>next_segment</b> (NULL)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a3f49df3c34a3e5a8884001c30230a94"></a><!-- doxytag: member="tbb::filter::filter" ref="a3f49df3c34a3e5a8884001c30230a94" args="(mode filter_mode)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><b>filter</b> (mode filter_mode)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b2b9c0dd8123a8186b46bc100d9469f5"></a><!-- doxytag: member="tbb::filter::set_end_of_input" ref="b2b9c0dd8123a8186b46bc100d9469f5" args="()" -->
void __TBB_EXPORTED_METHOD&nbsp;</td><td class="memItemRight" valign="bottom"><b>set_end_of_input</b> ()</td></tr>
<tr><td colspan="2"><br><h2>Static Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="4b7de3a76e744f3d9c1bc5d437ea851d"></a><!-- doxytag: member="tbb::filter::filter_is_serial" ref="4b7de3a76e744f3d9c1bc5d437ea851d" args="" -->
static const unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#4b7de3a76e744f3d9c1bc5d437ea851d">filter_is_serial</a> = 0x1</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">The lowest bit 0 is for parallel vs. serial. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static const unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#2e5eb65f95d8050186278077e433c5b1">filter_is_out_of_order</a> = 0x1&lt;&lt;4</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">4th bit distinguishes ordered vs unordered filters. <a href="#2e5eb65f95d8050186278077e433c5b1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="dd6a6e7210efc9bcaf2c5e08767d92b5"></a><!-- doxytag: member="tbb::filter::filter_is_bound" ref="dd6a6e7210efc9bcaf2c5e08767d92b5" args="" -->
static const unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#dd6a6e7210efc9bcaf2c5e08767d92b5">filter_is_bound</a> = 0x1&lt;&lt;5</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">5th bit distinguishes thread-bound and regular filters. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="bdd02a434a6e7499dd1e8f43aae96793"></a><!-- doxytag: member="tbb::filter::filter_may_emit_null" ref="bdd02a434a6e7499dd1e8f43aae96793" args="" -->
static const unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#bdd02a434a6e7499dd1e8f43aae96793">filter_may_emit_null</a> = 0x1&lt;&lt;6</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">6th bit marks input filters emitting small objects <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static const unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="a00294.html#f17200974c33be21f42a5f00893de028">exact_exception_propagation</a></td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">7th bit defines exception propagation mode expected by the application. <a href="#f17200974c33be21f42a5f00893de028"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8228ce0751009045e8158d2e642715a6"></a><!-- doxytag: member="tbb::filter::internal::stage_task" ref="8228ce0751009045e8158d2e642715a6" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><b>internal::stage_task</b></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="05d67150ca324698ba852553e223d3eb"></a><!-- doxytag: member="tbb::filter::internal::pipeline_root_task" ref="05d67150ca324698ba852553e223d3eb" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><b>internal::pipeline_root_task</b></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="b211ee58bada099e24280d478017cbff"></a><!-- doxytag: member="tbb::filter::pipeline" ref="b211ee58bada099e24280d478017cbff" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><b>pipeline</b></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e43b69a482df8e053cb199af69eb5139"></a><!-- doxytag: member="tbb::filter::thread_bound_filter" ref="e43b69a482df8e053cb199af69eb5139" args="" -->
class&nbsp;</td><td class="memItemRight" valign="bottom"><b>thread_bound_filter</b></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A stage in a pipeline.
<p>
<hr><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" name="66d159f362293e3964ba3da8bc1d2604"></a><!-- doxytag: member="tbb::filter::~filter" ref="66d159f362293e3964ba3da8bc1d2604" args="()" -->
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<td class="memname">virtual __TBB_EXPORTED_METHOD tbb::filter::~filter </td>
<td>(</td>
<td class="paramname"> </td>
<td>&nbsp;)&nbsp;</td>
<td width="100%"><code> [virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Destroy filter.
<p>
If the filter was added to a pipeline, the pipeline must be destroyed first.
</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="56275eb889c77c4807967133e21401bd"></a><!-- doxytag: member="tbb::filter::finalize" ref="56275eb889c77c4807967133e21401bd" args="(void *)" -->
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<td class="memname">virtual void tbb::filter::finalize </td>
<td>(</td>
<td class="paramtype">void *&nbsp;</td>
<td class="paramname"> </td>
<td>&nbsp;)&nbsp;</td>
<td width="100%"><code> [inline, virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Destroys item if pipeline was cancelled.
<p>
Required to prevent memory leaks. Note it can be called concurrently even for serial filters.
</div>
</div><p>
<a class="anchor" name="fa1b3dc1f4f47563ccab7f4d92f5b543"></a><!-- doxytag: member="tbb::filter::operator()" ref="fa1b3dc1f4f47563ccab7f4d92f5b543" args="(void *item)=0" -->
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<td class="memname">virtual void* tbb::filter::operator() </td>
<td>(</td>
<td class="paramtype">void *&nbsp;</td>
<td class="paramname"> <em>item</em> </td>
<td>&nbsp;)&nbsp;</td>
<td width="100%"><code> [pure virtual]</code></td>
</tr>
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<div class="memdoc">
<p>
Operate on an item from the input stream, and return item for output stream.
<p>
Returns NULL if filter is a sink.
</div>
</div><p>
<hr><h2>Member Data Documentation</h2>
<a class="anchor" name="f17200974c33be21f42a5f00893de028"></a><!-- doxytag: member="tbb::filter::exact_exception_propagation" ref="f17200974c33be21f42a5f00893de028" args="" -->
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<td class="memname">const unsigned char <a class="el" href="a00294.html#f17200974c33be21f42a5f00893de028">tbb::filter::exact_exception_propagation</a><code> [static, protected]</code> </td>
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<p>
<b>Initial value:</b><div class="fragment"><pre class="fragment">
<span class="preprocessor">#if TBB_USE_CAPTURED_EXCEPTION</span>
<span class="preprocessor"> 0x0</span>
</pre></div>7th bit defines exception propagation mode expected by the application.
<p>
</div>
</div><p>
<a class="anchor" name="2e5eb65f95d8050186278077e433c5b1"></a><!-- doxytag: member="tbb::filter::filter_is_out_of_order" ref="2e5eb65f95d8050186278077e433c5b1" args="" -->
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<td class="memname">const unsigned char <a class="el" href="a00294.html#2e5eb65f95d8050186278077e433c5b1">tbb::filter::filter_is_out_of_order</a> = 0x1&lt;&lt;4<code> [static, protected]</code> </td>
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<p>
4th bit distinguishes ordered vs unordered filters.
<p>
The bit was not set for parallel filters in TBB 2.1 and earlier, but <a class="el" href="a00294.html#cd53206c4795ef2df5df26b795caf692">is_ordered()</a> function always treats parallel filters as out of order.
</div>
</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li>pipeline.h</ul>
<hr>
<p></p>
Copyright &copy; 2005-2013 Intel Corporation. All Rights Reserved.
<p></p>
Intel, Pentium, Intel Xeon, Itanium, Intel XScale and VTune are
registered trademarks or trademarks of Intel Corporation or its
subsidiaries in the United States and other countries.
<p></p>
* Other names and brands may be claimed as the property of others.