Re: Lua GC optimize of some tricks

[Xianfu Pan <pxfgod@...>]

Greetings, dear Wu:

No, the first idea came to my mind was to call `luaH_resize(L, h, 0, 0)`.　it failed and crashed!

I have read the code of `luaH_resize(L, h, 0, 0)`, it only re-size the space but NOT deal with **ref-relationship** among gc objects. 

objects will be freed in C, but available in lua, thus it crashed.

2017-01-11 11:39 GMT+08:00 云风 Cloud Wu <cloudwu@gmail.com>:

Xianfu Pan <pxfgod@gmail.com>于2017年1月11日周三 上午10:03写道：

and `luaC_resettable` is implemented as follows in "lgc.c"

`

void luaC_resettable(lua_State *L, Table *h) {

/*need not to barrierback, because new value is NIL*/

Node *n, *limit = gnodelast(h);

unsigned int i;

for (i = 0; i < h->sizearray; i++){

TValue *cell = &h->array[i];

setnilvalue(cell);

}

for (n = gnode(h, 0); n < limit; n++) {  /* traverse hash part */

TValue *cell = gval(n);

if (!ttisnil(cell))

setnilvalue(cell);

}

}

`

Are there any issues/pitfalls of my implementation. Or any advices for me?

Many thanks.

I think you can call luaH_resize(L, h, 0, 0) instead of luaC_resettable you implement.