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// Copyright 2016 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @file SkipList.h
*
*/
#ifndef SKIPLIST_H_
#define SKIPLIST_H_
namespace eprosima {
namespace fastrtps{
namespace rtps {
template <class Obj>
class SkipNode
{
public:
SkipNode(Obj* obj,uint32_t level);
SkipNode(uint32_t level);
~SkipNode();
uint32_t m_height;
Obj* mp_data;
SkipNode** mp_fwdNodes;
};
template <class Obj>
class SkipList {
public:
SkipList(float probability, uint32_t maxHeight);
virtual ~SkipList();
bool insert_at_end(Obj* obj);
bool remove(Obj* obj);
bool insert(Obj* obj);
private:
uint32_t newLevel();
float rand01();
uint32_t m_maxHeight;
uint32_t m_currHeight;
float m_probability;
SkipNode<Obj>* mp_head;
SkipNode<Obj>** mp_tails;
};
}
} /* namespace rtps */
} /* namespace eprosima */
#endif /* SKIPLIST_H_ */
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