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| <div class="refentry"> |
| <a name="boost.lockfree.spsc_queue"></a><div class="titlepage"></div> |
| <div class="refnamediv"> |
| <h2><span class="refentrytitle">Class template spsc_queue</span></h2> |
| <p>boost::lockfree::spsc_queue</p> |
| </div> |
| <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="../../lockfree/reference.html#header.boost.lockfree.spsc_queue_hpp" title="Header <boost/lockfree/spsc_queue.hpp>">boost/lockfree/spsc_queue.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="special">...</span> Options<span class="special">></span> |
| <span class="keyword">class</span> <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</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">T</span> <a name="boost.lockfree.spsc_queue.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">implementation_defined</span><span class="special">::</span><span class="identifier">allocator</span> <a name="boost.lockfree.spsc_queue.allocator"></a><span class="identifier">allocator</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">implementation_defined</span><span class="special">::</span><span class="identifier">size_type</span> <a name="boost.lockfree.spsc_queue.size_type"></a><span class="identifier">size_type</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="spsc_queue.html#boost.lockfree.spsc_queueconstruct-copy-destruct">construct/copy/destruct</a></span> |
| <a class="link" href="spsc_queue.html#idp200431408-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="keyword">void</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> |
| <span class="keyword">explicit</span> <a class="link" href="spsc_queue.html#idp201959376-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">allocator</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind</span><span class="special"><</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">other</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">explicit</span> <a class="link" href="spsc_queue.html#idp209133376-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="identifier">allocator</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">explicit</span> <a class="link" href="spsc_queue.html#idp209134624-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> |
| <a class="link" href="spsc_queue.html#idp216010880-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">allocator</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind</span><span class="special"><</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">other</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <a class="link" href="spsc_queue.html#idp215838864-bb"><span class="identifier">spsc_queue</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">allocator_arg</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="spsc_queue.html#idp98556800-bb">public member functions</a></span> |
| <span class="keyword">bool</span> <a class="link" href="spsc_queue.html#idp98557360-bb"><span class="identifier">push</span></a><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">bool</span> <a class="link" href="spsc_queue.html#idp95884576-bb"><span class="identifier">pop</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">enable_if</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">is_convertible</span><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> |
| <a class="link" href="spsc_queue.html#idp152946592-bb"><span class="identifier">pop</span></a><span class="special">(</span><span class="identifier">U</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp144688800-bb"><span class="identifier">push</span></a><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="identifier">size_type</span> size<span class="special">></span> <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp155679088-bb"><span class="identifier">push</span></a><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">(</span><span class="special">&</span><span class="special">)</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ConstIterator<span class="special">></span> |
| <span class="identifier">ConstIterator</span> <a class="link" href="spsc_queue.html#idp149050256-bb"><span class="identifier">push</span></a><span class="special">(</span><span class="identifier">ConstIterator</span><span class="special">,</span> <span class="identifier">ConstIterator</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp156356704-bb"><span class="identifier">pop</span></a><span class="special">(</span><span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="identifier">size_type</span> size<span class="special">></span> <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp156346752-bb"><span class="identifier">pop</span></a><span class="special">(</span><span class="identifier">T</span><span class="special">(</span><span class="special">&</span><span class="special">)</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> OutputIterator<span class="special">></span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">disable_if</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">is_convertible</span><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">OutputIterator</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">size_type</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> |
| <a class="link" href="spsc_queue.html#idp155666240-bb"><span class="identifier">pop</span></a><span class="special">(</span><span class="identifier">OutputIterator</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Functor<span class="special">></span> <span class="keyword">bool</span> <a class="link" href="spsc_queue.html#idp155542224-bb"><span class="identifier">consume_one</span></a><span class="special">(</span><span class="identifier">Functor</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Functor<span class="special">></span> <span class="keyword">bool</span> <a class="link" href="spsc_queue.html#idp155355280-bb"><span class="identifier">consume_one</span></a><span class="special">(</span><span class="identifier">Functor</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Functor<span class="special">></span> <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp155341312-bb"><span class="identifier">consume_all</span></a><span class="special">(</span><span class="identifier">Functor</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> Functor<span class="special">></span> <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp155327136-bb"><span class="identifier">consume_all</span></a><span class="special">(</span><span class="identifier">Functor</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> |
| <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp155317296-bb"><span class="identifier">read_available</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">size_type</span> <a class="link" href="spsc_queue.html#idp155320592-bb"><span class="identifier">write_available</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&</span> <a class="link" href="spsc_queue.html#idp155013232-bb"><span class="identifier">front</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">T</span> <span class="special">&</span> <a class="link" href="spsc_queue.html#idp154759456-bb"><span class="identifier">front</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> |
| <span class="keyword">void</span> <a class="link" href="spsc_queue.html#idp154594816-bb"><span class="identifier">reset</span></a><span class="special">(</span><span class="keyword">void</span><span class="special">)</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="idp319981728"></a><h2>Description</h2> |
| <p>The <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> class provides a single-writer/single-reader fifo queue, pushing and popping is wait-free.</p> |
| <p><span class="bold"><strong>Policies:</strong></span> </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"><p><code class="computeroutput">boost::lockfree::capacity<></code>, optional <br> |
| If this template argument is passed to the options, the size of the ringbuffer is set at compile-time.</p></li> |
| <li class="listitem"><p><code class="computeroutput">boost::lockfree::allocator<></code>, defaults to <code class="computeroutput"><a class="link" href="allocator.html" title="Struct template allocator">boost::lockfree::allocator</a><std::allocator<T>></code> <br> |
| Specifies the allocator that is used to allocate the ringbuffer. This option is only valid, if the ringbuffer is configured to be sized at run-time</p></li> |
| </ul></div> |
| <p> |
| </p> |
| <p><span class="bold"><strong>Requirements:</strong></span> </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"><p>T must have a default constructor</p></li> |
| <li class="listitem"><p>T must be copyable </p></li> |
| </ul></div> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="idp319990864"></a><h3> |
| <a name="boost.lockfree.spsc_queueconstruct-copy-destruct"></a><code class="computeroutput">spsc_queue</code> |
| public |
| construct/copy/destruct</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><a name="idp200431408-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="keyword">void</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput"><a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a></code></p> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p><a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> must be configured to be sized at compile-time </p></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> U<span class="special">></span> |
| <span class="keyword">explicit</span> <a name="idp201959376-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">allocator</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind</span><span class="special"><</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">other</span> <span class="keyword">const</span> <span class="special">&</span> alloc<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><span class="keyword">explicit</span> <a name="idp209133376-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="identifier">allocator</span> <span class="keyword">const</span> <span class="special">&</span> alloc<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">explicit</span> <a name="idp209134624-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="identifier">size_type</span> element_count<span class="special">)</span><span class="special">;</span></pre> |
| <p>Constructs a <code class="computeroutput"><a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a></code> for element_count elements</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">Requires:</span></p></td> |
| <td><p><a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> must be configured to be sized at run-time </p></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> U<span class="special">></span> |
| <a name="idp216010880-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="identifier">size_type</span> element_count<span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">allocator</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind</span><span class="special"><</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">other</span> <span class="keyword">const</span> <span class="special">&</span> alloc<span class="special">)</span><span class="special">;</span></pre></li> |
| <li class="listitem"><pre class="literallayout"><a name="idp215838864-bb"></a><span class="identifier">spsc_queue</span><span class="special">(</span><span class="identifier">size_type</span> element_count<span class="special">,</span> <span class="identifier">allocator_arg</span> <span class="keyword">const</span> <span class="special">&</span> alloc<span class="special">)</span><span class="special">;</span></pre></li> |
| </ol></div> |
| </div> |
| <div class="refsect2"> |
| <a name="idp320052864"></a><h3> |
| <a name="idp98556800-bb"></a><code class="computeroutput">spsc_queue</code> public member functions</h3> |
| <div class="orderedlist"><ol class="orderedlist" type="1"> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">bool</span> <a name="idp98557360-bb"></a><span class="identifier">push</span><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span> t<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pushes object t to the ringbuffer.</p> |
| <p> |
| |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to push data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Postconditions:</span></p></td> |
| <td><p>object will be pushed to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a>, unless it is full. </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>true, if the push operation is successful.</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">bool</span> <a name="idp95884576-bb"></a><span class="identifier">pop</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>Pops one object from ringbuffer.</p> |
| <p> |
| |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to pop data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Postconditions:</span></p></td> |
| <td><p>if ringbuffer is not empty, object will be discarded. </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>true, if the pop operation is successful, false if ringbuffer was empty.</p></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> U<span class="special">></span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">enable_if</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">is_convertible</span><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">U</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> |
| <a name="idp152946592-bb"></a><span class="identifier">pop</span><span class="special">(</span><span class="identifier">U</span> <span class="special">&</span> ret<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pops one object from ringbuffer.</p> |
| <p> |
| |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to pop data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Postconditions:</span></p></td> |
| <td><p>if ringbuffer is not empty, object will be copied to ret. </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>true, if the pop operation is successful, false if ringbuffer was empty.</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp144688800-bb"></a><span class="identifier">push</span><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">*</span> t<span class="special">,</span> <span class="identifier">size_type</span> size<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pushes as many objects from the array t as there is space.</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to push data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of pushed items</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="identifier">size_type</span> size<span class="special">></span> <span class="identifier">size_type</span> <a name="idp155679088-bb"></a><span class="identifier">push</span><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">(</span><span class="special">&</span><span class="special">)</span> t<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pushes as many objects from the array t as there is space available.</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to push data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of pushed items</p></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> ConstIterator<span class="special">></span> |
| <span class="identifier">ConstIterator</span> <a name="idp149050256-bb"></a><span class="identifier">push</span><span class="special">(</span><span class="identifier">ConstIterator</span> begin<span class="special">,</span> <span class="identifier">ConstIterator</span> end<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pushes as many objects from the range [begin, end) as there is space .</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to push data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>iterator to the first element, which has not been pushed</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp156356704-bb"></a><span class="identifier">pop</span><span class="special">(</span><span class="identifier">T</span> <span class="special">*</span> ret<span class="special">,</span> <span class="identifier">size_type</span> size<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pops a maximum of size objects from ringbuffer.</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to pop data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of popped items</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="identifier">size_type</span> size<span class="special">></span> <span class="identifier">size_type</span> <a name="idp156346752-bb"></a><span class="identifier">pop</span><span class="special">(</span><span class="identifier">T</span><span class="special">(</span><span class="special">&</span><span class="special">)</span> ret<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pops a maximum of size objects from <code class="computeroutput"><a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a></code>.</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to pop data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of popped items</p></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> OutputIterator<span class="special">></span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">disable_if</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">is_convertible</span><span class="special"><</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">OutputIterator</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">size_type</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> |
| <a name="idp155666240-bb"></a><span class="identifier">pop</span><span class="special">(</span><span class="identifier">OutputIterator</span> it<span class="special">)</span><span class="special">;</span></pre> |
| <p>Pops objects to the output iterator it</p> |
| <p> |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to pop data to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a> </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of popped items</p></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> Functor<span class="special">></span> <span class="keyword">bool</span> <a name="idp155542224-bb"></a><span class="identifier">consume_one</span><span class="special">(</span><span class="identifier">Functor</span> <span class="special">&</span> f<span class="special">)</span><span class="special">;</span></pre> |
| <p>consumes one element via a functor</p> |
| <p>pops one element from the queue and applies the functor on this object</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and non-blocking, if functor is thread-safe and non-blocking </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>true, if one element was consumed</p></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> Functor<span class="special">></span> <span class="keyword">bool</span> <a name="idp155355280-bb"></a><span class="identifier">consume_one</span><span class="special">(</span><span class="identifier">Functor</span> <span class="keyword">const</span> <span class="special">&</span> f<span class="special">)</span><span class="special">;</span></pre> |
| <p>consumes one element via a functor</p> |
| <p>pops one element from the queue and applies the functor on this object</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and non-blocking, if functor is thread-safe and non-blocking </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>true, if one element was consumed</p></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> Functor<span class="special">></span> <span class="identifier">size_type</span> <a name="idp155341312-bb"></a><span class="identifier">consume_all</span><span class="special">(</span><span class="identifier">Functor</span> <span class="special">&</span> f<span class="special">)</span><span class="special">;</span></pre> |
| <p>consumes all elements via a functor</p> |
| <p>sequentially pops all elements from the queue and applies the functor on each object</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and non-blocking, if functor is thread-safe and non-blocking </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of elements that are consumed</p></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> Functor<span class="special">></span> <span class="identifier">size_type</span> <a name="idp155327136-bb"></a><span class="identifier">consume_all</span><span class="special">(</span><span class="identifier">Functor</span> <span class="keyword">const</span> <span class="special">&</span> f<span class="special">)</span><span class="special">;</span></pre> |
| <p>consumes all elements via a functor</p> |
| <p>sequentially pops all elements from the queue and applies the functor on each object</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and non-blocking, if functor is thread-safe and non-blocking </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of elements that are consumed</p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp155317296-bb"></a><span class="identifier">read_available</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>get number of elements that are available for read</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free, should only be called from the producer thread </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of available elements that can be popped from the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a></p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp155320592-bb"></a><span class="identifier">write_available</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>get write space to write elements</p> |
| <p> |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free, should only be called from the consumer thread </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody><tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>number of elements that can be pushed to the <a class="link" href="spsc_queue.html" title="Class template spsc_queue">spsc_queue</a></p></td> |
| </tr></tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&</span> <a name="idp155013232-bb"></a><span class="identifier">front</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> |
| <p>get reference to element in the front of the queue</p> |
| <p>Availability of front element can be checked using read_available().</p> |
| <p> |
| |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to check front element </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>read_available() > 0. If ringbuffer is empty, it's undefined behaviour to invoke this method. </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>reference to the first element in the queue</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="identifier">T</span> <span class="special">&</span> <a name="idp154759456-bb"></a><span class="identifier">front</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>get reference to element in the front of the queue</p> |
| <p>Availability of front element can be checked using read_available().</p> |
| <p> |
| |
| |
| </p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Thread-safe and wait-free </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist compact"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>only one thread is allowed to check front element </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Requires:</span></p></td> |
| <td><p>read_available() > 0. If ringbuffer is empty, it's undefined behaviour to invoke this method. </p></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">Returns:</span></p></td> |
| <td><p>reference to the first element in the queue</p></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </li> |
| <li class="listitem"> |
| <pre class="literallayout"><span class="keyword">void</span> <a name="idp154594816-bb"></a><span class="identifier">reset</span><span class="special">(</span><span class="keyword">void</span><span class="special">)</span><span class="special">;</span></pre> |
| <p>reset the ringbuffer</p> |
| <div class="note"><table border="0" summary="Note"> |
| <tr> |
| <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td> |
| <th align="left">Note</th> |
| </tr> |
| <tr><td align="left" valign="top"><p>Not thread-safe </p></td></tr> |
| </table></div> |
| <p> |
| </p> |
| </li> |
| </ol></div> |
| </div> |
| </div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2008-2011 Tim |
| Blechmann<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
| </p> |
| </div></td> |
| </tr></table> |
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