__gnu_parallel::_LoserTreeBase< _Tp, _Compare >(3)

NAME
__gnu_parallel::_LoserTreeBase< _Tp, _Compare > - Guarded loser/tournament tree.

SYNOPSIS

#include <losertree.h>

Inherited by __gnu_parallel::_LoserTree< false, _Tp, _Compare >, __gnu_parallel::_LoserTree< __stable, _Tp, _Compare >, and __gnu_parallel::_LoserTree< false, _Tp, _Compare >.

  Classes
struct _Loser
Internal representation of a _LoserTree element.

  Public Member Functions
_LoserTreeBase (unsigned int __k, _Compare __comp)
The constructor.
~_LoserTreeBase ()
The destructor.
int __get_min_source ()
void __insert_start (const _Tp &__key, int __source, bool __sup)
Initializes the sequence _M_source"withtheelement__key.

  Protected Attributes
_Compare _M_comp
_Compare to use.
bool _M_first_insert
State flag that determines whether the _LoserTree is empty.
unsigned int _M_ik
unsigned int _M_k
unsigned int _M_log_k
_Loser * _M_losers
_LoserTree __elements.
unsigned int _M_offset

Detailed Description

  template<typename _Tp, typename _Compare>
class __gnu_parallel::_LoserTreeBase< _Tp, _Compare >"Guarded loser/tournament tree. The smallest element is at the top.

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

Parameters
    _Tp the element type
    _Compare the comparator to use, defaults to std::less<_Tp>

Constructor & Destructor Documentation

  template<typename _Tp, typename _Compare> __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_LoserTreeBase (unsigned int __k, _Compare __comp) [inline]

The constructor.

Parameters
    __k The number of sequences to merge.
    __comp The comparator to use.

References __gnu_parallel::__rd_log2(), _M_comp, _M_first_insert, _M_log_k, and _M_losers.

  template<typename _Tp, typename _Compare> __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::~_LoserTreeBase () [inline]

The destructor.

References _M_losers.

Member Function Documentation

  template<typename _Tp, typename _Compare> int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::__get_min_source () [inline]

Returns
    the index of the sequence with the smallest element.

References _M_losers.

  template<typename _Tp, typename _Compare> void __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::__insert_start (const _Tp & __key, int __source, bool __sup) [inline]

Initializes the sequence "_M_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.

References _M_first_insert, and _M_losers.

Member Data Documentation

  template<typename _Tp, typename _Compare> _Compare __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_comp [protected]

_Compare to use.

Referenced by _LoserTreeBase().

  template<typename _Tp, typename _Compare> bool __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_first_insert [protected]

State flag that determines whether the _LoserTree is empty. Only used for building the _LoserTree.

Referenced by _LoserTreeBase(), and __insert_start().

  template<typename _Tp, typename _Compare> unsigned int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_log_k [protected]
log_2{_M_k}

Referenced by _LoserTreeBase().

  template<typename _Tp, typename _Compare> _Loser* __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers [protected]

_LoserTree __elements.

Referenced by _LoserTreeBase(), ~_LoserTreeBase(), __get_min_source(), and __insert_start().

Author

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