Esempi in C++ (Cpp) per quicklistPopCustom

Esempio n. 1

File: t_list.c Progetto: RealHacker/redis-plus

robj *listTypePop(robj *subject, int where) {
    long long vlong;
    robj *value = NULL;

    int ql_where = where == LIST_HEAD ? QUICKLIST_HEAD : QUICKLIST_TAIL;
    if (subject->encoding == OBJ_ENCODING_QUICKLIST) {
        if (quicklistPopCustom(subject->ptr, ql_where, (unsigned char **)&value,
                               NULL, &vlong, listPopSaver)) {
            if (!value)
                value = createStringObjectFromLongLong(vlong);
        }
    } else {
        serverPanic("Unknown list encoding");
    }
    return value;
}

Esempio n. 2

File: t_list.c Progetto: therenine/redis_source_annotation

//列表类型的从where弹出一个value，POP命令底层实现
robj *listTypePop(robj *subject, int where) {
    long long vlong;
    robj *value = NULL;

    //获得POP的位置，quicklist的头部或尾部
    int ql_where = where == LIST_HEAD ? QUICKLIST_HEAD : QUICKLIST_TAIL;

    //对列表对象编码为quicklist类型操作
    if (subject->encoding == OBJ_ENCODING_QUICKLIST) {
        //从ql_where位置POP出一个entry节点，保存在value或vlong中
        if (quicklistPopCustom(subject->ptr, ql_where, (unsigned char **)&value,
                               NULL, &vlong, listPopSaver)) {
            if (!value) //如果弹出的entry节点是整型的
                //则根据整型值创建一个字符串对象
                value = createStringObjectFromLongLong(vlong);
        }
    } else {
        serverPanic("Unknown list encoding");
    }
    return value;   //返回弹出entry节点的value值
}