-//$$CDS-header$$
+/*
+ This file is a part of libcds - Concurrent Data Structures library
-#ifndef __CDS_INTRUSIVE_FCSTACK_H
-#define __CDS_INTRUSIVE_FCSTACK_H
+ (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+ 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_INTRUSIVE_FCSTACK_H
+#define CDSLIB_INTRUSIVE_FCSTACK_H
#include <cds/algo/flat_combining.h>
#include <cds/algo/elimination_opt.h>
};
/// FCStack type traits
- struct type_traits: public cds::algo::flat_combining::type_traits
+ struct traits: public cds::algo::flat_combining::traits
{
typedef cds::intrusive::opt::v::empty_disposer disposer ; ///< Disposer to erase removed elements. Used only in \p FCStack::clear() function
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::disposer - the functor used for dispose removed items. Default is opt::intrusive::v::empty_disposer.
+ - any \p cds::algo::flat_combining::make_traits options
+ - \p opt::disposer - the functor used for dispose removed items. Default is \p opt::intrusive::v::empty_disposer.
This option is used only in \p FCStack::clear() function.
- - \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.
- List of all available memory ordering see opt::memory_model.
- Default if cds::opt::v:relaxed_ordering
+ - \p opt::stat - internal statistics, possible type: \p fcstack::stat, \p fcstack::empty_stat (the default)
- \p opt::enable_elimination - enable/disable operation \ref cds_elimination_description "elimination"
By default, the elimination is disabled.
*/
typedef implementation_defined type ; ///< Metafunction result
# else
typedef typename cds::opt::make_options<
- typename cds::opt::find_type_traits< type_traits, Options... >::type
+ typename cds::opt::find_type_traits< traits, Options... >::type
,Options...
>::type type;
# endif
- \p T - a value type stored in the stack
- \p Container - sequential intrusive container with \p push_front and \p pop_front functions.
Possible containers are \p boost::intrusive::slist (the default), \p boost::inrtrusive::list
- - \p Traits - type traits of flat combining, default is \p fcstack::type_traits.
- \p fcstack::make_traits metafunction can be used to construct specialized \p %type_traits
+ - \p Traits - type traits of flat combining, default is \p fcstack::traits.
+ \p fcstack::make_traits metafunction can be used to construct specialized \p %traits
*/
template <typename T
,class Container = boost::intrusive::slist<T>
- ,typename Traits = fcstack::type_traits
+ ,typename Traits = fcstack::traits
>
class FCStack
#ifndef CDS_DOXYGEN_INVOKED
public:
typedef T value_type; ///< Value type
typedef Container container_type; ///< Sequential container type
- typedef Traits type_traits; ///< Stack type traits
+ typedef Traits traits; ///< Stack traits
- typedef typename type_traits::disposer disposer; ///< The disposer functor. The disposer is used only in \ref clear() function
- 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::disposer disposer; ///< The disposer functor. The disposer is used only in \ref clear() function
+ 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
//@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
- fc_kernel m_FlatCombining;
- container_type m_Stack;
+ mutable fc_kernel m_FlatCombining;
+ container_type m_Stack;
//@endcond
public:
*/
bool push( value_type& val )
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
pRec->pVal = &val;
if ( c_bEliminationEnabled )
else
m_FlatCombining.combine( op_push, pRec, *this );
- assert( pRec->is_done() );
+ assert( pRec->is_done());
m_FlatCombining.release_record( pRec );
m_FlatCombining.internal_statistics().onPush();
return true;
/// Removes the element on top of the stack
value_type * pop()
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
pRec->pVal = nullptr;
if ( c_bEliminationEnabled )
else
m_FlatCombining.combine( op_pop, pRec, *this );
- assert( pRec->is_done() );
+ assert( pRec->is_done());
m_FlatCombining.release_record( pRec );
m_FlatCombining.internal_statistics().onPop( pRec->bEmpty );
*/
void clear( bool bDispose = false )
{
- fc_record * pRec = m_FlatCombining.acquire_record();
+ auto pRec = m_FlatCombining.acquire_record();
if ( c_bEliminationEnabled )
m_FlatCombining.batch_combine( bDispose ? op_clear_and_dispose : op_clear, pRec, *this );
else
m_FlatCombining.combine( bDispose ? op_clear_and_dispose : op_clear, pRec, *this );
- assert( pRec->is_done() );
+ assert( pRec->is_done());
m_FlatCombining.release_record( pRec );
}
*/
bool empty() const
{
- m_FlatCombining.wait_while_combining();
- return m_Stack.empty();
+ bool bRet = false;
+ auto const& stack = m_Stack;
+ m_FlatCombining.invoke_exclusive( [&stack, &bRet]() { bRet = stack.empty(); } );
+ return bRet;
}
/// Internal statistics
return m_FlatCombining.statistics();
}
-
public: // flat combining cooperation, not for direct use!
//@cond
/// Flat combining supporting function. Do not call it directly!
object if the current thread becomes a combiner. Invocation of the function means that
the stack should perform an action recorded in \p pRec.
*/
- void fc_apply( fc_record * pRec )
+ void fc_apply( fc_record* pRec )
{
assert( pRec );
- switch ( pRec->op() ) {
+ switch ( pRec->op()) {
case op_push:
assert( pRec->pVal );
- m_Stack.push_front( *(pRec->pVal ) );
+ m_Stack.push_front( *(pRec->pVal ));
break;
case op_pop:
pRec->bEmpty = m_Stack.empty();
m_Stack.clear();
break;
case op_clear_and_dispose:
- m_Stack.clear_and_dispose( disposer() );
+ m_Stack.clear_and_dispose( disposer());
break;
default:
assert(false);
{
typedef typename fc_kernel::iterator fc_iterator;
for ( fc_iterator it = itBegin, itPrev = itEnd; it != itEnd; ++it ) {
- switch ( it->op() ) {
+ switch ( it->op( atomics::memory_order_acquire )) {
case op_push:
case op_pop:
if ( itPrev != itEnd && collide( *itPrev, *it ))
//@cond
bool collide( fc_record& rec1, fc_record& rec2 )
{
- switch ( rec1.op() ) {
+ switch ( rec1.op()) {
case op_push:
if ( rec2.op() == op_pop ) {
assert(rec1.pVal);
}} // namespace cds::intrusive
-#endif // #ifndef __CDS_INTRUSIVE_FCSTACK_H
+#endif // #ifndef CDSLIB_INTRUSIVE_FCSTACK_H
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