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/*
+----------------------------------------------------------------------+
| Swoole |
+----------------------------------------------------------------------+
| This source file is subject to version 2.0 of the Apache license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.apache.org/licenses/LICENSE-2.0.html |
| If you did not receive a copy of the Apache2.0 license and are unable|
| to obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Tianfeng Han <rango@swoole.com> |
+----------------------------------------------------------------------+
*/
#pragma once
namespace swoole {
struct HeapNode {
uint64_t priority;
uint32_t position;
void *data;
};
class Heap {
public:
enum Type {
MIN_HEAP,
MAX_HEAP,
};
Heap(size_t _n, Type _type);
~Heap();
size_t count() {
return num - 1;
}
HeapNode *push(uint64_t priority, void *data);
void *pop();
void change_priority(uint64_t new_priority, HeapNode *ptr);
void remove(HeapNode *node);
void *peek();
void print();
int compare(uint64_t a, uint64_t b);
HeapNode *top() {
if (num == 1) {
return nullptr;
}
return nodes[1];
}
private:
uint32_t num;
uint32_t size;
enum Type type;
HeapNode **nodes;
void bubble_up(uint32_t i);
uint32_t maxchild(uint32_t i);
void percolate_down(uint32_t i);
};
}
|