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/*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// modified by Dan Gibson on 05/20/05 to accomidate FASTER
// >32 set lengths, using an array of ints w/ 32 bits/int
#ifndef __MEM_RUBY_COMMON_SET_HH__
#define __MEM_RUBY_COMMON_SET_HH__
#include <iostream>
#include <limits>
#include "mem/ruby/common/TypeDefines.hh"
/*
* This defines the number of longs (32-bits on 32 bit machines,
* 64-bit on 64-bit AMD machines) to use to hold the set...
* the default is 4, allowing 128 or 256 different members
* of the set.
*
* This should never need to be changed for correctness reasons,
* though increasing it will increase performance for larger
* set sizes at the cost of a (much) larger memory footprint
*
*/
const int NUMBER_WORDS_PER_SET = 1;
class Set
{
private:
int m_nSize; // the number of bits in this set
int m_nArrayLen; // the number of 32-bit words that are
// held in the array
// Changed 5/24/05 for static allocation of array
// note that "long" corresponds to 32 bits on a 32-bit machine,
// 64 bits if the -m64 parameter is passed to g++, which it is
// for an AMD opteron under our configuration
long *m_p_nArray; // an word array to hold the bits in the set
long m_p_nArray_Static[NUMBER_WORDS_PER_SET];
static const int LONG_BITS = std::numeric_limits<long>::digits + 1;
static const int INDEX_SHIFT = LONG_BITS == 64 ? 6 : 5;
static const int INDEX_MASK = (1 << INDEX_SHIFT) - 1;
void clearExcess();
public:
Set();
Set(int size);
Set(const Set& obj);
~Set();
Set& operator=(const Set& obj);
void
add(NodeID index)
{
m_p_nArray[index >> INDEX_SHIFT] |=
(((unsigned long) 1) << (index & INDEX_MASK));
}
void addSet(const Set& set);
void addRandom();
void
remove(NodeID index)
{
m_p_nArray[index >> INDEX_SHIFT] &=
~(((unsigned long)1) << (index & INDEX_MASK));
}
void removeSet(const Set& set);
void
clear()
{
for (int i = 0; i < m_nArrayLen; i++)
m_p_nArray[i] = 0;
}
void broadcast();
int count() const;
bool isEqual(const Set& set) const;
// return the logical OR of this set and orSet
Set OR(const Set& orSet) const;
// return the logical AND of this set and andSet
Set AND(const Set& andSet) const;
// Returns true if the intersection of the two sets is empty
bool
intersectionIsEmpty(const Set& other_set) const
{
for (int i = 0; i < m_nArrayLen; i++)
if (m_p_nArray[i] & other_set.m_p_nArray[i])
return false;
return true;
}
bool isSuperset(const Set& test) const;
bool isSubset(const Set& test) const { return test.isSuperset(*this); }
bool
isElement(NodeID element) const
{
return (m_p_nArray[element>>INDEX_SHIFT] &
(((unsigned long)1) << (element & INDEX_MASK))) != 0;
}
bool isBroadcast() const;
bool isEmpty() const;
NodeID smallestElement() const;
void setSize(int size);
NodeID
elementAt(int index) const
{
if (isElement(index))
return (NodeID)true;
else
return 0;
}
int getSize() const { return m_nSize; }
void print(std::ostream& out) const;
};
inline std::ostream&
operator<<(std::ostream& out, const Set& obj)
{
obj.print(out);
out << std::flush;
return out;
}
#endif // __MEM_RUBY_COMMON_SET_HH__
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