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Copy pathcache.cpp
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46 lines (41 loc) · 971 Bytes
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Copy pathcache.cpp
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46 lines (41 loc) · 971 Bytes
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#include "cache.h"
int cache::insert(shared_ptr<node>data) {
if(count == 0) {
head = data ;
head->nexts = nullptr ;
head->pre = nullptr ;
tail = head ;
}
//当前缓存还够用，将节点插入到链表尾部
if(count < num) {
tail->nexts = data ;
data->pre = tail ;
tail = data ;
count++ ;
}
if(count >=num){
head = head->nexts ;
tail->nexts = data ;
data->pre = tail ;
tail = data ;
}
return 1 ;
}
bool cache::accessData(int num) {
shared_ptr<node>cur = head ;
while(cur) {
if(cur->val == num) {
moveLast(cur) ;
return true ;
}
cur = cur->nexts;
}
return 1;
}
//将被访问的节点挪到链表尾部
void cache::moveLast(shared_ptr<node>cur) {
cur->pre->nexts = cur->nexts ;
cur->nexts->pre = cur->pre ;
tail->nexts = cur ;
cur->pre = tail ;
}