NAME

       __gnu_parallel::LoserTreeBase< T, Comparator > -

SYNOPSIS

       Inherited by __gnu_parallel::LoserTree< stable, T, Comparator >, and
       __gnu_parallel::LoserTree< false, T, Comparator >.

   Classes
       struct Loser

   Public Member Functions
       int get_min_source ()
       void insert_start (const T &key, int source, bool sup)
       LoserTreeBase (unsigned int _k, Comparator _comp)
       ~LoserTreeBase ()

   Protected Attributes
       unsigned int _M_log_k
       Comparator comp
       bool first_insert
       unsigned int ik
       unsigned int k
       Loser * losers
       unsigned int offset

Detailed Description

   template<typename T, typename Comparator>class __gnu_parallel::LoserTreeBase< T, Comparator >
       Guarded loser/tournament tree.

       The smallest element is at the top.

       Guarding is done explicitly through one flag sup per element, inf is not needed due to a
       better initialization routine. This is a well-performing variant.

       Parameters:
           T the element type
           Comparator the comparator to use, defaults to std::less<T>

       Definition at line 57 of file losertree.h.

Constructor & Destructor Documentation

   template<typename T , typename Comparator > __gnu_parallel::LoserTreeBase< T, Comparator
       >::LoserTreeBase (unsigned int_k, Comparator_comp) [inline]
       The constructor.

       Parameters:
           _k The number of sequences to merge.
           _comp The comparator to use.

       Definition at line 96 of file losertree.h.

       References __gnu_parallel::__log2(), __gnu_parallel::LoserTreeBase< T, Comparator
       >::_M_log_k, __gnu_parallel::LoserTreeBase< T, Comparator >::first_insert, and
       __gnu_parallel::LoserTreeBase< T, Comparator >::losers.

   template<typename T , typename Comparator > __gnu_parallel::LoserTreeBase< T, Comparator
       >::~LoserTreeBase () [inline]
       The destructor.

       Definition at line 119 of file losertree.h.

       References __gnu_parallel::LoserTreeBase< T, Comparator >::losers.

Member Function Documentation

   template<typename T , typename Comparator > int __gnu_parallel::LoserTreeBase< T, Comparator
       >::get_min_source () [inline]
       Returns:
           the index of the sequence with the smallest element.

       Definition at line 152 of file losertree.h.

       References __gnu_parallel::LoserTreeBase< T, Comparator >::losers, and
       __gnu_parallel::LoserTreeBase< T, Comparator >::Loser::source.

   template<typename T , typename Comparator > void __gnu_parallel::LoserTreeBase< T, Comparator
       >::insert_start (const T &key, intsource, boolsup) [inline]
       Initializes the sequence 'source' with the element 'key'.

       Parameters:
           key the element to insert
           source index of the source sequence
           sup flag that determines whether the value to insert is an explicit supremum.

       Definition at line 131 of file losertree.h.

       References __gnu_parallel::LoserTreeBase< T, Comparator >::first_insert,
       __gnu_parallel::LoserTreeBase< T, Comparator >::Loser::key, __gnu_parallel::LoserTreeBase<
       T, Comparator >::losers, __gnu_parallel::LoserTreeBase< T, Comparator >::Loser::source,
       and __gnu_parallel::LoserTreeBase< T, Comparator >::Loser::sup.

Member Data Documentation

   template<typename T , typename Comparator > unsigned int __gnu_parallel::LoserTreeBase< T,
       Comparator >::_M_log_k [protected]
       log_2{k}

       Definition at line 74 of file losertree.h.

       Referenced by __gnu_parallel::LoserTreeBase< T, Comparator >::LoserTreeBase().

   template<typename T , typename Comparator > Comparator __gnu_parallel::LoserTreeBase< T,
       Comparator >::comp [protected]
       Comparator to use.

       Definition at line 80 of file losertree.h.

   template<typename T , typename Comparator > bool __gnu_parallel::LoserTreeBase< T, Comparator
       >::first_insert [protected]
       State flag that determines whether the LoserTree is empty. Only used for building the
       LoserTree.

       Definition at line 87 of file losertree.h.

       Referenced by __gnu_parallel::LoserTreeBase< T, Comparator >::insert_start(), and
       __gnu_parallel::LoserTreeBase< T, Comparator >::LoserTreeBase().

   template<typename T , typename Comparator > Loser* __gnu_parallel::LoserTreeBase< T,
       Comparator >::losers [protected]
       LoserTree elements.

       Definition at line 77 of file losertree.h.

       Referenced by __gnu_parallel::LoserTreeBase< T, Comparator >::get_min_source(),
       __gnu_parallel::LoserTreeBase< T, Comparator >::insert_start(),
       __gnu_parallel::LoserTreeBase< T, Comparator >::LoserTreeBase(), and
       __gnu_parallel::LoserTreeBase< T, Comparator >::~LoserTreeBase().

Author

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