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/*
Copyright 2005-2008 Intel Corporation. All Rights Reserved.
This file is part of Threading Building Blocks.
Threading Building Blocks is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
Threading Building Blocks 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.
You should have received a copy of the GNU General Public License
along with Threading Building Blocks; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, you may use this file as part of a free software
library without restriction. Specifically, if other files instantiate
templates or use macros or inline functions from this file, or you compile
this file and link it with other files to produce an executable, this
file does not by itself cause the resulting executable to be covered by
the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
#include "Matrix.h"
#include "tbb/atomic.h"
#include <vector>
namespace TBB = tbb;
enum OpKind {
// Use Cell's value
OP_VALUE,
// Unary negation
OP_NEGATE,
// Addition
OP_ADD,
// Subtraction
OP_SUB,
// Multiplication
OP_MUL
};
static const int ArityOfOp[] = {0,1,2,2,2};
class Cell {
public:
//! Operation for this cell
OpKind op;
//! Inputs to this cell
Cell* input[2];
//! Type of value stored in a Cell
typedef Matrix value_type;
//! Value associated with this Cell
value_type value;
//! Set of cells that use this Cell as an input
std::vector<Cell*> successor;
//! Reference count of number of inputs that are not yet updated.
TBB::atomic<int> ref_count;
//! Update the Cell's value.
void update();
//! Default construtor
Cell() {}
};
//! A directed graph where the vertices are Cells.
class Graph {
std::vector<Cell> my_vertex_set;
public:
//! Create a random acyclic directed graph
void create_random_dag( size_t number_of_nodes );
//! Print the graph
void print();
//! Get set of cells that have no inputs.
void get_root_set( std::vector<Cell*>& root_set );
};
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