NAME
__gnu_parallel::LoserTreeBase -
SYNOPSIS
Inherited by __gnu_parallel::LoserTree< stable, T, Comparator >, and __gnu_parallel::LoserTree< false, T, Comparator >.
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 63 of file losertree.h.
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
Classes
struct Loser
Internal representation of a LoserTree element.
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 102 of file losertree.h.
References __gnu_parallel::LoserTreeBase< T, Comparator >::_M_log_k, __gnu_parallel::LoserTreeBase< T, Comparator >::first_insert, __gnu_parallel::log2(), and __gnu_parallel::LoserTreeBase< T, Comparator >::losers.
template<typename T, typename Comparator> __gnu_parallel::LoserTreeBase< T, Comparator >::~LoserTreeBase () [inline]
The destructor.
Definition at line 125 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 158 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, int source, bool sup) [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 137 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 80 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 86 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 93 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 83 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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