-//$$CDS-header$$
-
-#ifndef __CDS_CONTAINER_FCDEQUE_H
-#define __CDS_CONTAINER_FCDEQUE_H
+/*
+ This file is a part of libcds - Concurrent Data Structures library
+
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016
+
+ Source code repo: http://github.com/khizmax/libcds/
+ Download: http://sourceforge.net/projects/libcds/files/
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef CDSLIB_CONTAINER_FCDEQUE_H
+#define CDSLIB_CONTAINER_FCDEQUE_H
#include <cds/algo/flat_combining.h>
#include <cds/algo/elimination_opt.h>
};
/// FCDeque type traits
- struct type_traits: public cds::algo::flat_combining::type_traits
+ struct traits: public cds::algo::flat_combining::traits
{
typedef empty_stat stat; ///< Internal statistics
- static CDS_CONSTEXPR_CONST bool enable_elimination = false; ///< Enable \ref cds_elimination_description "elimination"
+ static CDS_CONSTEXPR const bool enable_elimination = false; ///< Enable \ref cds_elimination_description "elimination"
};
/// Metafunction converting option list to traits
/**
- This is a wrapper for <tt> cds::opt::make_options< type_traits, Options...> </tt>
\p Options are:
- - \p opt::lock_type - mutex type, default is \p cds::lock::Spin
- - \p opt::back_off - back-off strategy, defalt is \p cds::backoff::Default
+ - \p opt::lock_type - mutex type, default is \p cds::sync::spin
+ - \p opt::back_off - back-off strategy, defalt is \p cds::backoff::delay_of<2>
- \p opt::allocator - allocator type, default is \ref CDS_DEFAULT_ALLOCATOR
- \p opt::stat - internal statistics, possible type: \ref stat, \ref empty_stat (the default)
- \p opt::memory_model - C++ memory ordering model.
By default, the elimination is disabled. For queue, the elimination is possible if the queue
is empty.
*/
- template <CDS_DECL_OPTIONS8>
+ template <typename... Options>
struct make_traits {
# ifdef CDS_DOXYGEN_INVOKED
typedef implementation_defined type ; ///< Metafunction result
# else
typedef typename cds::opt::make_options<
- typename cds::opt::find_type_traits< type_traits, CDS_OPTIONS8 >::type
- ,CDS_OPTIONS8
+ typename cds::opt::find_type_traits< traits, Options... >::type
+ ,Options...
>::type type;
# endif
};
- \p T - a value type stored in the deque
- \p Deque - sequential deque implementation, for example, \p std::deque<T> (the default)
or \p boost::container::deque
- - \p Trats - type traits of flat combining, default is \p fcdeque::type_traits.
- \p fcdeque::make_traits metafunction can be used to construct specialized \p %type_traits
+ - \p Trats - type traits of flat combining, default is \p fcdeque::traits.
+ \p fcdeque::make_traits metafunction can be used to construct specialized \p %fcdeque::traits
*/
template <typename T,
class Deque = std::deque<T>,
- typename Traits = fcdeque::type_traits
+ typename Traits = fcdeque::traits
>
class FCDeque
#ifndef CDS_DOXYGEN_INVOKED
public:
typedef T value_type; ///< Value type
typedef Deque deque_type; ///< Sequential deque class
- typedef Traits type_traits; ///< Deque type traits
+ typedef Traits traits; ///< Deque type traits
- typedef typename type_traits::stat stat; ///< Internal statistics type
- static CDS_CONSTEXPR_CONST bool c_bEliminationEnabled = type_traits::enable_elimination; ///< \p true if elimination is enabled
+ typedef typename traits::stat stat; ///< Internal statistics type
+ static CDS_CONSTEXPR const bool c_bEliminationEnabled = traits::enable_elimination; ///< \p true if elimination is enabled
protected:
//@cond
op_push_back_move, ///< Push back (move semantics)
op_pop_front, ///< Pop front
op_pop_back, ///< Pop back
- op_clear ///< Clear
+ op_clear, ///< Clear
+ op_empty ///< Empty
};
/// Flat combining publication list record
//@endcond
/// Flat combining kernel
- typedef cds::algo::flat_combining::kernel< fc_record, type_traits > fc_kernel;
+ typedef cds::algo::flat_combining::kernel< fc_record, traits > fc_kernel;
protected:
//@cond
/**
If the combining is in process the function waits while combining done.
*/
- bool empty() const
+ bool empty()
{
- m_FlatCombining.wait_while_combining();
- return m_Deque.empty();
+ fc_record * pRec = m_FlatCombining.acquire_record();
+
+ if ( c_bEliminationEnabled )
+ m_FlatCombining.batch_combine( op_empty, pRec, *this );
+ else
+ m_FlatCombining.combine( op_empty, pRec, *this );
+
+ assert( pRec->is_done() );
+ m_FlatCombining.release_record( pRec );
+ return pRec->bEmpty;
}
/// Internal statistics
{
assert( pRec );
+ // this function is called under FC mutex, so switch TSan off
+ CDS_TSAN_ANNOTATE_IGNORE_RW_BEGIN;
+
switch ( pRec->op() ) {
case op_push_front:
assert( pRec->pValPush );
assert( pRec->pValPop );
pRec->bEmpty = m_Deque.empty();
if ( !pRec->bEmpty ) {
- *(pRec->pValPop) = m_Deque.front();
+ *(pRec->pValPop) = std::move( m_Deque.front());
m_Deque.pop_front();
}
break;
assert( pRec->pValPop );
pRec->bEmpty = m_Deque.empty();
if ( !pRec->bEmpty ) {
- *(pRec->pValPop) = m_Deque.back();
+ *(pRec->pValPop) = std::move( m_Deque.back());
m_Deque.pop_back();
}
break;
while ( !m_Deque.empty() )
m_Deque.pop_front();
break;
+ case op_empty:
+ pRec->bEmpty = m_Deque.empty();
+ break;
default:
assert(false);
break;
}
+ CDS_TSAN_ANNOTATE_IGNORE_RW_END;
}
/// Batch-processing flat combining
void fc_process( typename fc_kernel::iterator itBegin, typename fc_kernel::iterator itEnd )
{
typedef typename fc_kernel::iterator fc_iterator;
+
+ // this function is called under FC mutex, so switch TSan off
+ CDS_TSAN_ANNOTATE_IGNORE_RW_BEGIN;
+
for ( fc_iterator it = itBegin, itPrev = itEnd; it != itEnd; ++it ) {
switch ( it->op() ) {
case op_push_front:
+ if ( itPrev != itEnd
+ && (itPrev->op() == op_pop_front || (m_Deque.empty() && itPrev->op() == op_pop_back)) )
+ {
+ collide( *it, *itPrev );
+ itPrev = itEnd;
+ }
+ else
+ itPrev = it;
+ break;
case op_push_front_move:
if ( itPrev != itEnd
&& (itPrev->op() == op_pop_front || ( m_Deque.empty() && itPrev->op() == op_pop_back )))
{
- collide( *it, *itPrev );
+ collide_move( *it, *itPrev );
itPrev = itEnd;
}
else
itPrev = it;
break;
case op_push_back:
- case op_push_back_move:
if ( itPrev != itEnd
- && (itPrev->op() == op_pop_back || ( m_Deque.empty() && itPrev->op() == op_pop_front )))
+ && (itPrev->op() == op_pop_back || (m_Deque.empty() && itPrev->op() == op_pop_front)) )
{
collide( *it, *itPrev );
itPrev = itEnd;
else
itPrev = it;
break;
- case op_pop_front:
+ case op_push_back_move:
if ( itPrev != itEnd
- && ( itPrev->op() == op_push_front || itPrev->op() == op_push_front_move
- || ( m_Deque.empty() && ( itPrev->op() == op_push_back || itPrev->op() == op_push_back_move ))))
+ && (itPrev->op() == op_pop_back || ( m_Deque.empty() && itPrev->op() == op_pop_front )))
{
- collide( *itPrev, *it );
+ collide_move( *it, *itPrev );
itPrev = itEnd;
}
else
itPrev = it;
break;
+ case op_pop_front:
+ if ( itPrev != itEnd ) {
+ if ( m_Deque.empty() ) {
+ switch ( itPrev->op() ) {
+ case op_push_back:
+ collide( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ case op_push_back_move:
+ collide_move( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ default:
+ itPrev = it;
+ break;
+ }
+ }
+ else {
+ switch ( itPrev->op() ) {
+ case op_push_front:
+ collide( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ case op_push_front_move:
+ collide_move( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ default:
+ itPrev = it;
+ break;
+ }
+ }
+ }
+ else
+ itPrev = it;
+ break;
case op_pop_back:
- if ( itPrev != itEnd
- && ( itPrev->op() == op_push_back || itPrev->op() == op_push_back_move
- || ( m_Deque.empty() && ( itPrev->op() == op_push_front || itPrev->op() == op_push_front_move ))))
- {
- collide( *itPrev, *it );
- itPrev = itEnd;
+ if ( itPrev != itEnd ) {
+ if ( m_Deque.empty() ) {
+ switch ( itPrev->op() ) {
+ case op_push_front:
+ collide( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ case op_push_front_move:
+ collide_move( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ default:
+ itPrev = it;
+ break;
+ }
+ }
+ else {
+ switch ( itPrev->op() ) {
+ case op_push_back:
+ collide( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ case op_push_back_move:
+ collide_move( *itPrev, *it );
+ itPrev = itEnd;
+ break;
+ default:
+ itPrev = it;
+ break;
+ }
+ }
}
else
itPrev = it;
break;
}
}
+ CDS_TSAN_ANNOTATE_IGNORE_RW_END;
}
//@endcond
m_FlatCombining.operation_done( recPop );
m_FlatCombining.internal_statistics().onCollide();
}
+
+ void collide_move( fc_record& recPush, fc_record& recPop )
+ {
+ *(recPop.pValPop) = std::move( *(recPush.pValPush));
+ recPop.bEmpty = false;
+ m_FlatCombining.operation_done( recPush );
+ m_FlatCombining.operation_done( recPop );
+ m_FlatCombining.internal_statistics().onCollide();
+ }
//@endcond
};
}} // namespace cds::container
-#endif // #ifndef __CDS_CONTAINER_FCDEQUE_H
+#endif // #ifndef CDSLIB_CONTAINER_FCDEQUE_H
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