/usr/include/linbox/algorithms/cra-kaapi.h is in liblinbox-dev 1.1.6~rc0-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | /* -*- mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* author: B. David Saunders and Zhendong Wan*/
// parallelized for BOINC computing by Bryan Youse
// ======================================================================= //
// Time-stamp: <09 Feb 07 17:10:21 Jean-Guillaume.Dumas@imag.fr>
// ======================================================================= //
#ifndef __LINBOX_CRA_KAAPI_H
#define __LINBOX_CRA_KAAPI_H
#include <vector>
#include <cstdlib>
#include <utility>
#include "linbox/util/timer.h"
#include "linbox/integer.h"
#include "linbox/solutions/methods.h"
#include "linbox/kaapi/communicate.h"
namespace LinBox {
/**************************************************************************************************
* CRA loop subroutine
* given a function and a prime, this returns the residue by applying given function
* this must be thread safe and communicable
* \param p Prime Integer
* \param f function used to compute residue
* \return the residue
*/
template<class Function, class Domain >
struct Residue {
Function *_f;
Residue(): _f(0) {}
Residue(Function& ff): _f(&ff) {}
Residue(const Residue<Function,Domain>&r ) : _f(r._f) {}
typename Domain::Element operator()(Domain D) {
typename Domain::Element d;
D.init(d);
return (*_f)(d,D);
}
};
template<class CRABase>
struct ChineseRemainder {
typedef typename CRABase::Domain Domain;
typedef typename CRABase::DomainElement DomainElement;
protected:
CRABase Builder_;
public:
template<class Param>
ChineseRemainder(const Param& b) : Builder_(b) {}
template<class Int, class Function, class PrimeIterator>
Int& operator() (Int& res, Function& Iteration, PrimeIterator& primeiter) {
double start = Util::WallTimer::gettime();
++primeiter;
Domain D(*primeiter);
DomainElement r; D.init(r);
Builder_.initialize( D, Iteration(r, D) );
// the task used to extract residue
Residue<Function,Domain> residue(Iteration);
size_t nb_primes = 4;
size_t nb_done=0;
while( ! Builder_.terminated() )
{
Domain domains [nb_primes];
DomainElement domainelements[nb_primes];
// generate the array of domain
for (size_t i=0;i < nb_primes;i++) {
do {
++primeiter;
} while( Builder_.noncoprime(*primeiter) ) ;
domains[i]=Domain(*primeiter);
}
// recursively call the send function
a1::transform(
domains,
domains+nb_primes,
domainelements,
residue
);
// when it's done, analyze the result
for(size_t i=0;i<nb_primes;++i) {
Builder_.progress(domains[i], domainelements[i]);
}
nb_done+=nb_primes;
nb_primes=nb_done/2;
}
std::cout << "TIME=" << Util::WallTimer::gettime()-start << std::endl;
return Builder_.result(res);
}
template<class Int, template <class T> class Vect, class Function, class PrimeIterator>
Vect<Int> & operator() (Vect<Int>& res, Function& Iteration, PrimeIterator& primeiter) {
++primeiter;
Domain D(*primeiter);
Vect<DomainElement> r;
Builder_.initialize( D, Iteration(r, D) );
while( ! Builder_.terminated() ) {
++primeiter; while(Builder_.noncoprime(*primeiter) ) ++primeiter;
Domain D(*primeiter);
Vect<DomainElement> r;
Builder_.progress( D, Iteration(r, D) );
}
return Builder_.result(res);
}
};
}
/*
* marshalling operator,
* WARNING: those are dummy ones, the real ones are *really* hard to implement because of BlackBoxes
* whose interface is hidden and does not make it easy to be communicable
*/
template<class Function, class Domain >
a1::OStream& operator<<( a1::OStream& out, const LinBox::Residue<Function, Domain>& ) {
return out ;
}
template<class Function, class Domain >
a1::IStream& operator>>( a1::IStream& in, LinBox::Residue<Function, Domain>& )
{
return in;
}
#endif
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