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<h1 class="topictitle1">broadcast_node Template Class</h1>
<div>
<div class="section"><h2 class="sectiontitle">Summary</h2>
<p>A node that broadcasts incoming messages to all of its successors.
</p>
</div>
<div class="section"><h2 class="sectiontitle">Syntax</h2>
<pre>template < typename T > class broadcast_node;</pre>
</div>
<div class="section"><h2 class="sectiontitle">Header</h2>
<pre>#include "tbb/flow_graph.h"</pre>
</div>
<div class="section"><h2 class="sectiontitle">Description</h2>
<p>A
<span class="keyword">broadcast_node</span> is a
<span class="keyword">graph_node</span>,
<span class="keyword">receiver<T></span> and
<span class="keyword">sender<T></span> that broadcasts incoming messages of
type
<span class="keyword">T</span> to all of its successors. There is no buffering in
the node, so all messages are forwarded immediately to all successors.
</p>
<p>Rejection of messages by successors is handled using the protocol in
the Message Passing Protocol, see link below.
</p>
<p><span class="keyword">T</span> must be copy-constructible and assignable.
</p>
</div>
<div class="section"><h2 class="sectiontitle">Members</h2>
<pre>namespace tbb {
namespace flow {
template< typename T >
class broadcast_node :
public graph_node, public receiver<T>, public sender<T> {
public:
broadcast_node( graph &g );
broadcast_node( const broadcast_node &src );
// receiver<T>
typedef T input_type;
typedef sender<input_type> predecessor_type;
bool try_put( const input_type &v );
bool register_predecessor( predecessor_type &p );
bool remove_predecessor( predecessor_type &p );
// sender<T>
typedef T output_type;
typedef receiver<output_type> successor_type;
bool register_successor( successor_type &r );
bool remove_successor( successor_type &r );
bool try_get( output_type &v );
bool try_reserve( output_type &v );
bool try_release( );
bool try_consume( );
};
}
}</pre>
<div class="tablenoborder"><table cellpadding="4" summary="" frame="border" border="1" cellspacing="0" rules="all"><span class="tabledesc">The following table provides additional information on the
members of this template class.
</span><thead align="left">
<tr>
<th class="cellrowborder" valign="top" width="33.89830508474576%" id="d64417e156">Member
</th>
<th class="cellrowborder" valign="top" width="66.10169491525423%" id="d64417e159">Description
</th>
</tr>
</thead>
<tbody>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">broadcast_node( graph &g
)</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Constructs an object of type
<span class="keyword">broadcast_node</span> that belongs to the
<span class="keyword">graph g</span>.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">broadcast_node( const
broadcast_node &src )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Constructs an object of type
<span class="keyword">broadcast_node</span> that belongs to the same
<span class="keyword">graph g</span> as
<span class="keyword">src</span>. The list of predecessors, the list of
successors and the messages in the buffer are NOT copied.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool try_put( const input_type
&v )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Adds
<span class="keyword">v</span> to all successors.
</p>
<p><strong>Returns</strong>: always returns
<span class="keyword">true</span>, even if it was unable to
successfully forward the message to any of its successors.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool register_predecessor(
predecessor_type &p )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Never rejects puts and therefore does not need to maintain a
list of predecessors.
</p>
<p><strong>Returns</strong>:
<span class="keyword">false</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool remove_predecessor(
predecessor_type &p )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Never rejects puts and therefore does not need to maintain a
list of predecessors.
</p>
<p><strong>Returns</strong>:
<span class="keyword">false</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool register_successor(
successor_type &r )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Adds
<span class="keyword">r</span> to the set of successors.
</p>
<p><strong>Returns</strong>:
<span class="keyword">true</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool remove_successor(
successor_type &r )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>Removes
<span class="keyword">r</span> from the set of successors.
</p>
<p><strong>Returns</strong>:
<span class="keyword">true</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool try_get( output_type &v
)</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p>If the internal buffer is valid, assigns the value to
<span class="keyword">v</span>.
</p>
<p><strong>Returns</strong>:
<span class="keyword">true</span> if
<span class="keyword">v</span> is assigned to.
<span class="keyword">false</span> if
<span class="keyword">v</span> is not assigned to.
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool try_reserve( output_type
&v )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p><strong>Returns</strong>:
<span class="keyword">false</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool try_release( )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p><strong>Returns</strong>:
<span class="keyword">false</span>
</p>
</td>
</tr>
<tr>
<td class="cellrowborder" valign="top" width="33.89830508474576%" headers="d64417e156 "><span class="keyword">bool try_consume( )</span>
</td>
<td class="cellrowborder" valign="top" width="66.10169491525423%" headers="d64417e159 ">
<p><strong>Returns</strong>:
<span class="keyword">false</span>
</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="../../reference/flow_graph.htm">Flow Graph</a></div>
</div>
<div class="See Also">
<h2>See Also</h2>
<div class="linklist">
<div><a href="message_passing_protocol.htm">Message Passing Protocol
</a></div></div>
</div>
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