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/*
* Copyright 2018 Google, Inc.
*
* 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.
*
* Authors: Gabe Black
*/
#ifndef __SYSTEMC_CORE_LIST_HH__
#define __SYSTEMC_CORE_LIST_HH__
#include <functional>
#include "base/fiber.hh"
#include "systemc/core/object.hh"
#include "systemc/ext/core/sc_event.hh"
#include "systemc/ext/core/sc_module.hh"
#include "systemc/ext/core/sc_process_handle.hh"
namespace sc_gem5
{
struct ListNode
{
ListNode() : nextListNode(nullptr), prevListNode(nullptr) {}
virtual ~ListNode() {}
ListNode *nextListNode;
ListNode *prevListNode;
void
popListNode()
{
if (nextListNode)
nextListNode->prevListNode = prevListNode;
if (prevListNode)
prevListNode->nextListNode = nextListNode;
nextListNode = nullptr;
prevListNode = nullptr;
}
};
template <typename T>
struct NodeList : public ListNode
{
NodeList()
{
nextListNode = this;
prevListNode = this;
}
void
pushFirst(T *t)
{
// Make sure this node isn't currently in a different list.
t->popListNode();
// The node behind t is whoever used to be first.
t->nextListNode = nextListNode;
// The node that used to be first is behind t.
nextListNode->prevListNode = t;
// Nobody is in front of t.
t->prevListNode = this;
// The first node is t.
nextListNode = t;
}
void
pushLast(T *t)
{
// Make sure this node isn't currently in a different list.
t->popListNode();
// The node in front of t is whoever used to be last.
t->prevListNode = prevListNode;
// The node that used to be last is in front of t.
prevListNode->nextListNode = t;
// Nobody is behind t.
t->nextListNode = this;
// The last node is t.
prevListNode = t;
}
T *getNext() { return dynamic_cast<T *>(nextListNode); }
bool empty() { return getNext() == nullptr; }
};
} // namespace sc_gem5
#endif //__SYSTEMC_CORE_LIST_HH__
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