浏览器怎么做能不拦截网站,h5创建网站,广州活动策划公司排名,dede打包好的网站怎么提取模板一、内核链表#xff08;是一个有头双向循环链表#xff09;
1.内核提供的两个宏
(1) offsetof : 获取结构体成员到结构体开头的偏移量#xff1b;
(2) contianer_of : 通过偏移量获取结构体首地址#xff1b;
2.代码示例#xff1a;
truct passager *create_passage…一、内核链表是一个有头双向循环链表
1.内核提供的两个宏
(1) offsetof : 获取结构体成员到结构体开头的偏移量
(2) contianer_of : 通过偏移量获取结构体首地址
2.代码示例
truct passager *create_passager(char *name, int flt_num, int sit_num, char card)
{struct passager *p malloc(sizeof(struct passager));if (NULL p){perror(fail malloc);return NULL;}strcpy(p-name, name);p-flt_num flt_num;p-sit_num sit_num;p-card card;return p;
}struct flight *create_flight(int flt_num,char *src,char *dst)
{struct flight *p malloc(sizeof(struct flight));if(NULL p){perror(fail malloc\n);return NULL;}p-flt_num flt_num;strcpy(p-src,src);strcpy(p-dst,dst);return p;
}KLink_t *create_klink()
{KLink_t *pklink malloc(sizeof(KLink_t));if (NULL pklink){perror(fail malloc);return NULL;}pklink-phead NULL;pklink-clen 0;pthread_mutex_init((pklink-mutex), NULL);return pklink;
}int push_klink_head(KLink_t *pklink, void *p)
{KNode_t *pnode (KNode_t *)p;pnode-pnext NULL;pnode-ppre NULL;pnode-pnext pklink-phead;if (pklink-phead ! NULL){pklink-phead-ppre pnode;}pklink-phead pnode;pklink-clen;return 0;
}int push_klink_tail(KLink_t *plink, void *p)
{KNode_t *pnode (KNode_t *)p;pnode-pnext NULL;pnode-ppre NULL;if (plink-phead NULL){plink-phead pnode;}else{KNode_t *p plink-phead;while (p-pnext ! NULL){p p-pnext;}p-pnext pnode;pnode-ppre p;}plink-clen;return 0;
}void klink_for_each(KLink_t *pklink, void (*pfun)(void *))
{KNode_t *pnode pklink-phead;while (pnode ! NULL){pfun(pnode);pnode pnode-pnext;}
}
KNode_t *find_klink(KLink_t *pklink, void *t, CMP_t pfun)
{KNode_t *pnode pklink-phead;while (pnode ! NULL){if (pfun(t, pnode)){return pnode;}pnode pnode-pnext;}return NULL;
}int is_empty_klink(KLink_t *pklink)
{return NULL pklink-phead;
}int pop_klink_head(KLink_t *pklink)
{if (is_empty_klink(pklink))return 0;KNode_t *pdel pklink-phead;pklink-phead pdel-pnext;if (pklink-phead ! NULL){pklink-phead-ppre NULL;}free(pdel);pklink-clen--;return 1;
}void destroy_klink(KLink_t *pklink)
{while (!is_empty_klink(pklink)){pop_klink_head(pklink);}free(pklink);
}
