刚开始看VMM，请教~

wangfang221

刚开始看这东西，也看了些例子。搞不大明白的就是callback和factory。看到说明里说的意思大概是callback是用来添加一些自己定义的功能的，但是例子里面总是在调callback里面的pre和post这两个函数。是不是只能在之前添加和之后添加的意思？另外factory里面提到了randomize_obj不知道是不是让数据随机的意思？总之还是不太明白。
求高人指点一二！

humann

your understanding are right!

wangfang221

为什么是are不是is？

escorial

Callbacks are used to add user specified actions for selected events, for example if we have memory, we can add pre_put callback to inject error data to be written in memory and post_put callback, to see the final contents beign written to memory. Callback functions are organized in classes so we can have array of callback objects, each object with it's own behavior. For specified example, the transactor calls the pre_put function of the head ellement of callback object's array, then transactor calls pre_put of the 2nd object e.t.c.

Factory is a class specified for customizing the vmm_data objects in a way, user wants, for example, adding special constraints.

xuri2009

我也在学习vmm这是我的QQ号有空可以交流交流
995114082

rab2002

我也正在学这个，对这两个也是感觉很困惑

cyzhai

学习学习

kyoiwaiah

顶一个！

lstry

是在之前,还是在之后调用,不是取决于它的名字,是PRE,还是POST,要看你插入callback的位置

denlly111

xiexie