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/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
--------------------------------------------------------------------------------
*/
#pragma once
#include "polymake/Matrix.h"
#include "polymake/Vector.h"
#include <cassert>
namespace polymake { namespace common {
class SharedMemorySegment {
protected:
pm::shared_array_placement shmaddr;
int shmid;
SharedMemorySegment() {}
explicit SharedMemorySegment(size_t size) { resize(size); }
~SharedMemorySegment();
void resize(size_t size);
private:
SharedMemorySegment(const SharedMemorySegment&) = delete;
void operator= (const SharedMemorySegment&) = delete;
public:
int get_shmid() const { return shmid; }
};
template <typename E>
class SharedMemoryVector
: public SharedMemorySegment
, public Vector<E> {
typedef Vector<E> base_t;
static size_t alloc_size(Int n) { return base_t::shared_array_type::alloc_size(n); }
public:
SharedMemoryVector() {}
explicit SharedMemoryVector(Int n)
: SharedMemorySegment(alloc_size(n))
, base_t(shmaddr, n) {}
template <typename E2>
SharedMemoryVector(Int n, const E2& init,
std::enable_if_t<pm::can_initialize<E2, E>::value, std::nullptr_t> = nullptr)
: SharedMemorySegment(alloc_size(n))
, base_t(shmaddr, n, init) {}
template <typename Iterator>
SharedMemoryVector(Int n, Iterator&& src,
std::enable_if_t<pm::assess_iterator_value<Iterator, pm::can_initialize, E>::value, std::nullptr_t> = nullptr)
: SharedMemorySegment(alloc_size(n))
, base_t(shmaddr, n, std::forward<Iterator>(src)) {}
template <typename Vector2>
SharedMemoryVector(const GenericVector<Vector2, E>& v)
: SharedMemorySegment(alloc_size(v.dim()))
, base_t(shmaddr, v.dim(), ensure(v.top(), pm::dense()).begin()) {}
template <typename Vector2, typename E2>
explicit SharedMemoryVector(const GenericVector<Vector2, E2>& v,
std::enable_if_t<pm::can_initialize<E2, E>::value, std::nullptr_t> = nullptr)
: SharedMemorySegment(alloc_size(v.dim()))
, base_t(shmaddr, v.dim(), ensure(v.top(), pm::dense()).begin()) {}
template <typename E2,
typename = std::enable_if_t<pm::can_initialize<E2, E>::value>>
SharedMemoryVector(std::initializer_list<E2> l)
: SharedMemorySegment(alloc_size(l.size()))
, base_t(shmaddr, l.size(), l.begin()) {}
SharedMemoryVector(const SharedMemoryVector& v)
: SharedMemorySegment(alloc_size(v.dim()))
, base_t(shmaddr, v.dim(), v.begin()) {}
SharedMemoryVector& operator= (const SharedMemoryVector& other)
{
base_t::generic_type::operator=(other);
return *this;
}
using base_t::generic_type::operator=;
template <typename Vector2>
SharedMemoryVector& operator= (const GenericVector<Vector2>& other)
{
base_t::generic_type::operator=(other);
return *this;
}
using base_t::generic_type::swap;
protected:
using base_t::generic_type::assign;
using base_t::generic_type::fill_impl;
public:
void clear() { this->fill(zero_value<E>()); }
void resize(Int n)
{
if (!shmaddr.get()) {
SharedMemorySegment::resize(alloc_size(n));
base_t::resize(shmaddr, n);
} else {
assert(n == this->size());
}
}
template <typename R>
void operator|= (const R&) { throw std::runtime_error("SharedMemoryVector - concatenation not allowed"); }
};
template <typename E>
class SharedMemoryMatrix
: public SharedMemorySegment
, public Matrix<E> {
using base_t = Matrix<E>;
template <typename Iterator>
using fits_as_input_iterator = typename base_t::template fits_as_input_iterator<Iterator>;
static size_t alloc_size(Int r, Int c)
{
return base_t::shared_array_type::alloc_size(r * c);
}
public:
SharedMemoryMatrix() {}
SharedMemoryMatrix(Int r, Int c)
: SharedMemorySegment(alloc_size(r, c))
, base_t(shmaddr, r, c) {}
SharedMemoryMatrix(Int r, Int c, const E& init)
: SharedMemorySegment(alloc_size(r, c))
, base_t(shmaddr, r, c, init) {}
template <typename Iterator, typename = std::enable_if_t<fits_as_input_iterator<Iterator>::value>>
SharedMemoryMatrix(Int r, Int c, Iterator&& src)
: SharedMemorySegment(alloc_size(r, c))
, base_t(shmaddr, r, c, std::forward<Iterator>(src)) {}
template <typename Matrix2, typename E2>
SharedMemoryMatrix(const GenericMatrix<Matrix2, E2>& m,
std::enable_if_t<pm::can_initialize<E2, E>::value, std::nullptr_t> = nullptr)
: SharedMemorySegment(alloc_size(m.rows(), m.cols()))
, base_t(shmaddr, m.rows(), m.cols(), ensure(concat_rows(m), pm::dense()).begin()) {}
template <typename Container>
SharedMemoryMatrix(const Container& src,
std::enable_if_t<pm::isomorphic_to_container_of<Container, Vector<E>>::value, std::nullptr_t> = nullptr)
: SharedMemorySegment(alloc_size(src.size(), src.empty() ? 0 : get_dim(src.front())))
, base_t(shmaddr, src.size(), src.empty() ? 0 : get_dim(src.front()), src.begin()) {}
SharedMemoryMatrix(const SharedMemoryMatrix& m)
: SharedMemorySegment(alloc_size(m.rows(), m.cols()))
, base_t(shmaddr, m.rows(), m.cols(), concat_rows(m).begin()) {}
SharedMemoryMatrix& operator= (const SharedMemoryMatrix& other)
{
base_t::generic_type::operator=(other);
return *this;
}
using base_t::generic_type::operator=;
using base_t::generic_type::swap;
protected:
using base_t::generic_type::assign;
using base_t::generic_type::fill_impl;
public:
void resize(Int r, Int c)
{
if (!shmaddr.get()) {
SharedMemorySegment::resize(alloc_size(r, c));
base_t::resize(shmaddr, r, c);
} else {
assert(r == this->rows() && c == this->cols());
}
}
void clear() { this->fill(E(0)); }
template <typename Matrix2>
void operator/= (const GenericMatrix<Matrix2,E>&) { throw std::runtime_error("SharedMemoryMatrix - concatenation not allowed"); }
template <typename Vector2>
void operator/= (const GenericVector<Vector2,E>&) { throw std::runtime_error("SharedMemoryMatrix - concatenation not allowed"); }
template <typename Matrix2>
void operator|= (const GenericMatrix<Matrix2,E>&) { throw std::runtime_error("SharedMemoryMatrix - concatenation not allowed"); }
template <typename Vector2>
void operator|= (const GenericVector<Vector2,E>&) { throw std::runtime_error("SharedMemoryMatrix - concatenation not allowed"); }
};
template <typename E> inline
Rows< Matrix<E> >& rows(SharedMemoryMatrix<E>& m) { return rows(static_cast<Matrix<E>&>(m)); }
template <typename E> inline
const Rows< Matrix<E> >& rows(const SharedMemoryMatrix<E>& m) { return rows(static_cast<const Matrix<E>&>(m)); }
template <typename E> inline
Cols< Matrix<E> >& cols(SharedMemoryMatrix<E>& m) { return cols(static_cast<Matrix<E>&>(m)); }
template <typename E> inline
const Cols< Matrix<E> >& cols(const SharedMemoryMatrix<E>& m) { return cols(static_cast<const Matrix<E>&>(m)); }
template <typename E> inline
ConcatRows< Matrix<E> >& concat_rows(SharedMemoryMatrix<E>& m) { return concat_rows(static_cast<Matrix<E>&>(m)); }
template <typename E> inline
const ConcatRows< Matrix<E> >& concat_rows(const SharedMemoryMatrix<E>& m) { return concat_rows(static_cast<const Matrix<E>&>(m)); }
} }
// Local Variables:
// mode:C++
// c-basic-offset:3
// indent-tabs-mode:nil
// End:
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