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41 lines
923 B
41 lines
923 B
#ifndef C_SRC_PRIORITY_QUEUE_H_
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#define C_SRC_PRIORITY_QUEUE_H_
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#include "macros.h"
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typedef bool(*LessFun)(void*, void*);
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typedef void(*UpdatePositionFun)(void*, int);
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typedef void(*DestroyElementFun)(void*);
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class PriorityQueue
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{
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public:
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PriorityQueue(LessFun ls, UpdatePositionFun upd, DestroyElementFun dtor);
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~PriorityQueue();
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bool insert(void* item);
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bool remove(void* item, int pos);
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void* remove(int pos);
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void* pop() {return remove(0);}
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void* peek();
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int size() const { return length_;}
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private:
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inline void set(int pos, void* item);
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inline void pos_swap(int pos1, int pos2);
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void bubble_down(int pos);
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void bubble_up(int pos);
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int capacity_;
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int length_;
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void** heap_;
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LessFun less_;
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UpdatePositionFun update_pos_fun_;
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DestroyElementFun item_dtor_;
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DISALLOW_COPY_AND_ASSIGN(PriorityQueue);
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};
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#endif // C_SRC_PRIORITY_QUEUE_H_
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