Manpages

NAME

distributor - data distribution table (rheolef-7.0)

SYNOPSIS

Used by "disarray"(1), "asr"(1) and "csr"(1). and such classes that distribute data as chunk.

IMPLEMENTATION

class distributor : public Vector<std::allocator<int>::size_type> {
public:

// typedefs:

typedef std::allocator<int>::size_type size_type;
typedef Vector<size_type> _base;
typedef _base::iterator iterator;
typedef _base::const_iterator const_iterator;
typedef int tag_type;
typedef communicator communicator_type;

// constants:

static const size_type decide = size_type(-1);

// allocators/deallocators:

distributor(
size_type dis_size = 0,
const communicator_type& c = communicator_type(),
size_type loc_size = decide);

distributor(const distributor&);
~distributor();

void resize(
size_type dis_size = 0,
const communicator_type& c = communicator_type(),
size_type loc_size = decide);

// accessors:

const communicator_type& comm() const;

/// global and local sizes
size_type dis_size () const;

/// current process id
size_type process () const;

/// number of processes
size_type n_process () const;

/// find iproc associated to a global index dis_i: CPU=log(nproc)
size_type find_owner (size_type dis_i) const;

/// global index range and local size owned by ip-th process
size_type first_index (size_type ip) const;
size_type last_index (size_type ip) const;
size_type size (size_type ip) const;

/// global index range and local size owned by current process
size_type first_index () const;
size_type last_index () const;
size_type size () const;

/// true when dis_i in [first_index(ip):last_index(ip)[
bool is_owned (size_type dis_i, size_type ip) const;

// the same with ip=current process
bool is_owned (size_type dis_i) const;

/// returns a new tag
static tag_type get_new_tag();

// comparators:

bool operator== (const distributor&) const;
bool operator!= (const distributor&) const;
// data:
protected:
communicator_type _comm;
};

COPYRIGHT

Copyright (C) 2000-2018 Pierre Saramito <Pierre.Saramito [AT] imag.fr> GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>;. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.