__gnu_parallel::_LoserTreeBgnu<parallel::pLoserTreeBase< _Tp, _Compare >(3cxx)
NAME
__gnu_parallel::_LoserTreeBase< _Tp, _Compare > - Guarded
loser/tournament tree.
SYNOPSIS
Inherited by __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' with the element '__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(), __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.
References __gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_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 __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.
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
template<typename _Tp , typename _Compare > _Compare
__gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_comp [protected]
_Compare to use.
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 __gnu_parallel::_LoserTreeBase< _Tp, _Compare
>::_LoserTreeBase(), and __gnu_parallel::_LoserTreeBase< _Tp, _Compare
>::__insert_start().
template<typename _Tp , typename _Compare > unsigned int
__gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_log_k [protected]
log_2{_M_k}
Referenced by __gnu_parallel::_LoserTreeBase< _Tp, _Compare
>::_LoserTreeBase().
template<typename _Tp , typename _Compare > _Loser*
__gnu_parallel::_LoserTreeBase< _Tp, _Compare >::_M_losers [protected]
_LoserTree __elements.
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().
Author
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libstdc++ __gnu_parallel::3LoserTreeBase< _Tp, _Compare >(3cxx)
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