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proxies must be created with a __gc field in their metatables to work

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properly with new semantics for finalizers
This commit is contained in:
Roberto Ierusalimschy 2008-02-19 15:54:09 -03:00
parent 2f8351fe48
commit fa19baab7f
1 changed files with 4 additions and 2 deletions
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6
lbaselib.c
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@ -1,5 +1,5 @@
/*
** $Id: lbaselib.c,v 1.203 2008/02/11 19:14:52 roberto Exp roberto $
** $Id: lbaselib.c,v 1.204 2008/02/14 16:03:09 roberto Exp roberto $
** Basic library
** See Copyright Notice in lua.h
*/
@ -418,7 +418,9 @@ static int luaB_newproxy (lua_State *L) {
if (lua_toboolean(L, 1) == 0)
return 1; /* no metatable */
else if (lua_isboolean(L, 1)) {
lua_newtable(L); /* create a new metatable `m' ... */
lua_createtable(L, 0, 1); /* create a new metatable `m' ... */
lua_pushboolean(L, 1);
lua_setfield(L, -2, "__gc"); /* ... m.__gc = false (HACK!!)... */
lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */
lua_pushboolean(L, 1);
lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */