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

#include <losertree.h>

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

Classes
struct	_Loser

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

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.

Constructor & Destructor Documentation

_LoserTreeBase()

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.

~_LoserTreeBase()

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.

Member Function Documentation

__get_min_source()

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.

__insert_start()

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.

Member Data Documentation

_M_comp

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.

_M_first_insert

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

_M_ik

template<typename _Tp , typename _Compare >

unsigned int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_ik

protected

Definition at line 69 of file losertree.h.

_M_k

template<typename _Tp , typename _Compare >

unsigned int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_k

protected

Definition at line 69 of file losertree.h.

_M_log_k

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().

_M_losers

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

_M_offset

template<typename _Tp , typename _Compare >

unsigned int __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_offset

protected

Definition at line 69 of file losertree.h.

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

• losertree.h