__gnu_parallel::_LoserTreeBase< _Tp, _Compare > Class Template Reference

Inheritance diagram for __gnu_parallel::_LoserTreeBase< _Tp, _Compare >:

List of all members.

Classes

• struct _Loser

  Internal representation of a _LoserTree element. More...
  

Public Member Functions

• _LoserTreeBase (unsigned int __k, _Compare __comp)
• ~_LoserTreeBase ()
• int __get_min_source ()
• void __insert_start (const _Tp &__key, int __source, bool __sup)

Protected Attributes

• _Compare _M_comp
• bool _M_first_insert
• unsigned int _M_ik
• unsigned int _M_k
• unsigned int _M_log_k
• _Loser * _M_losers
• unsigned int _M_offset

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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>

Definition at line 55 of file losertree.h.

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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.

Definition at line 94 of file losertree.h.

References __gnu_parallel::__rd_log2(), __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_first_insert, __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_log_k, and __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers.

template<typename _Tp , typename _Compare >

__gnu_parallel::_LoserTreeBase< _Tp, _Compare >::~_LoserTreeBase

(

)

[inline]

The destructor.

Definition at line 118 of file losertree.h.

References __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers.

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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.

Definition at line 155 of file losertree.h.

References __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers, and __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_Loser::_M_source.

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.

Definition at line 134 of file losertree.h.

References __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_first_insert, __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_Loser::_M_key, __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers, __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_Loser::_M_source, and __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_Loser::_M_sup.

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Member Data Documentation

template<typename _Tp , typename _Compare >

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

_Compare to use.

Definition at line 78 of file losertree.h.

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.

Definition at line 85 of file losertree.h.

Referenced by __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::__insert_start(), and __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_LoserTreeBase().

template<typename _Tp , typename _Compare >

unsigned int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_log_k [protected]

log_2{_M_k}

Definition at line 72 of file losertree.h.

Referenced by __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_LoserTreeBase().

template<typename _Tp , typename _Compare >

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

_LoserTree __elements.

Definition at line 75 of file losertree.h.

Referenced by __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::__get_min_source(), __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::__insert_start(), __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_LoserTreeBase(), and __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::~_LoserTreeBase().

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The documentation for this class was generated from the following file:

• losertree.h