multiway_merge.h File Reference

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## Classes

struct | __gnu_parallel::__multiway_merge_3_variant_sentinel_switch< __sentinels, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
struct | __gnu_parallel::__multiway_merge_3_variant_sentinel_switch< true, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
struct | __gnu_parallel::__multiway_merge_4_variant_sentinel_switch< __sentinels, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
struct | __gnu_parallel::__multiway_merge_4_variant_sentinel_switch< true, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
struct | __gnu_parallel::__multiway_merge_k_variant_sentinel_switch< __sentinels, __stable, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
struct | __gnu_parallel::__multiway_merge_k_variant_sentinel_switch< false, __stable, _RAIterIterator, _RAIter3, _DifferenceTp, _Compare >
class | __gnu_parallel::_GuardedIterator< _RAIter, _Compare >
struct | __gnu_parallel::_LoserTreeTraits< _Tp >
struct | __gnu_parallel::_SamplingSorter< __stable, _RAIter, _StrictWeakOrdering >
struct | __gnu_parallel::_SamplingSorter< false, _RAIter, _StrictWeakOrdering >

## Namespaces

namespace | __gnu_parallel

## Macros

#define | _GLIBCXX_PARALLEL_DECISION(__a, __b, __c, __d)
#define | _GLIBCXX_PARALLEL_LENGTH(__s)
#define | _GLIBCXX_PARALLEL_MERGE_3_CASE(__a, __b, __c, __c0, __c1)
#define | _GLIBCXX_PARALLEL_MERGE_4_CASE(__a, __b, __c, __d,__c0, __c1, __c2)

## Functions

template<typename _RAIter1 , typename _RAIter2 , typename _OutputIterator , typename _DifferenceTp , typename _Compare >
_OutputIterator | __gnu_parallel::__merge_advance (_RAIter1 &__begin1, _RAIter1 __end1, _RAIter2 &__begin2, _RAIter2 __end2, _OutputIterator __target, _DifferenceTp __max_length, _Compare __comp)
template<bool __stable, bool __sentinels, typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::__sequential_multiway_merge (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, const typename std::iterator_traits< typename std::iterator_traits< _RAIterIterator >::value_type::first_type >::value_type &__sentinel, _DifferenceTp __length, _Compare __comp)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::sequential_tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::exact_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::sampling_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, parallel_tag __tag=parallel_tag(0))
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, default_parallel_tag __tag)
template<template< typename RAI, typename C > class iterator, typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::multiway_merge_3_variant (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, _DifferenceTp __length, _Compare __comp)
template<template< typename RAI, typename C > class iterator, typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::multiway_merge_4_variant (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, _DifferenceTp __length, _Compare __comp)
template<bool __stable, typename _RAIterIterator , typename _Compare , typename _DifferenceType >
void | __gnu_parallel::multiway_merge_exact_splitting (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _DifferenceType __length, _DifferenceType __total_length, _Compare __comp, std::vector< std::pair< _DifferenceType, _DifferenceType > > *__pieces)
template<typename _LT , typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::multiway_merge_loser_tree (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, _DifferenceTp __length, _Compare __comp)
template<typename UnguardedLoserTree , typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::multiway_merge_loser_tree_sentinel (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, const typename std::iterator_traits< typename std::iterator_traits< _RAIterIterator >::value_type::first_type >::value_type &__sentinel, _DifferenceTp __length, _Compare __comp)
template<typename _LT , typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Compare >
_RAIter3 | __gnu_parallel::multiway_merge_loser_tree_unguarded (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, const typename std::iterator_traits< typename std::iterator_traits< _RAIterIterator >::value_type::first_type >::value_type &__sentinel, _DifferenceTp __length, _Compare __comp)
template<bool __stable, typename _RAIterIterator , typename _Compare , typename _DifferenceType >
void | __gnu_parallel::multiway_merge_sampling_splitting (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _DifferenceType __length, _DifferenceType __total_length, _Compare __comp, std::vector< std::pair< _DifferenceType, _DifferenceType > > *__pieces)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::sequential_tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::exact_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, sampling_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, parallel_tag __tag=parallel_tag(0))
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, default_parallel_tag __tag)
template<bool __stable, bool __sentinels, typename _RAIterIterator , typename _RAIter3 , typename _DifferenceTp , typename _Splitter , typename _Compare >
_RAIter3 | __gnu_parallel::parallel_multiway_merge (_RAIterIterator __seqs_begin, _RAIterIterator __seqs_end, _RAIter3 __target, _Splitter __splitter, _DifferenceTp __length, _Compare __comp, _ThreadIndex __num_threads)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::sequential_tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::exact_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, sampling_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, parallel_tag __tag=parallel_tag(0))
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, default_parallel_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::sequential_tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, __gnu_parallel::exact_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, sampling_tag __tag)
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, parallel_tag __tag=parallel_tag(0))
template<typename _RAIterPairIterator , typename _RAIterOut , typename _DifferenceTp , typename _Compare >
_RAIterOut | __gnu_parallel::stable_multiway_merge_sentinels (_RAIterPairIterator __seqs_begin, _RAIterPairIterator __seqs_end, _RAIterOut __target, _DifferenceTp __length, _Compare __comp, default_parallel_tag __tag)

## Detailed Description

Implementation of sequential and parallel multiway merge.

Explanations on the high-speed merging routines in the appendix of

P. Sanders. Fast priority queues for cached memory. ACM Journal of Experimental Algorithmics, 5, 2000.

This file is a GNU parallel extension to the Standard C++ Library.

Definition in file multiway_merge.h.

## Macro Definition Documentation

#define _GLIBCXX_PARALLEL_LENGTH | ( |  | __s | ) |

Length of a sequence described by a pair of iterators.

Definition at line 54 of file multiway_merge.h.

Referenced by __gnu_parallel::__sequential_multiway_merge(), __gnu_parallel::multiway_merge_exact_splitting(), __gnu_parallel::multiway_merge_loser_tree(), __gnu_parallel::multiway_merge_sampling_splitting(), and __gnu_parallel::parallel_multiway_merge().