From 11a70220670f25a9929439f0b27331f09f05235c Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 8 May 2000 16:32:53 -0300
Subject: global variables are stored in a Lua table

---
 lgc.c | 31 ++-----------------------------
 1 file changed, 2 insertions(+), 29 deletions(-)

(limited to 'lgc.c')

diff --git a/lgc.c b/lgc.c
index ac213df2..32dd6471 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 1.46 2000/03/30 20:55:50 roberto Exp roberto $
+** $Id: lgc.c,v 1.47 2000/04/14 18:12:35 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -77,18 +77,6 @@ static void hashmark (lua_State *L, Hash *h) {
 }
 
 
-static void travglobal (lua_State *L) {
-  GlobalVar *gv;
-  for (gv=L->rootglobal; gv; gv=gv->next) {
-    LUA_ASSERT(L, gv->name->u.s.gv == gv, "inconsistent global name");
-    if (gv->value.ttype != TAG_NIL) {
-      strmark(L, gv->name);  /* cannot collect non nil global variables */
-      markobject(L, &gv->value);
-    }
-  }
-}
-
-
 static void travstack (lua_State *L) {
   int i;
   for (i = (L->top-1)-L->stack; i>=0; i--)
@@ -173,20 +161,6 @@ static void collecttable (lua_State *L) {
 }
 
 
-/*
-** remove from the global list globals whose names will be collected
-** (the global itself is freed when its name is freed)
-*/
-static void clear_global_list (lua_State *L, int limit) {
-  GlobalVar **p = &L->rootglobal;
-  GlobalVar *next;
-  while ((next = *p) != NULL) {
-    if (next->name->marked >= limit) p = &next->next;
-    else *p = next->next;
-  }
-}
-
-
 /*
 ** collect all elements with `marked' < `limit'.
 ** with limit=1, that means all unmarked elements;
@@ -196,7 +170,6 @@ static void collectstring (lua_State *L, int limit) {
   TObject o;  /* to call userdata `gc' tag method */
   int i;
   ttype(&o) = TAG_USERDATA;
-  clear_global_list(L, limit);
   for (i=0; i<NUM_HASHS; i++) {  /* for each hash table */
     stringtable *tb = &L->string_root[i];
     int j;
@@ -228,7 +201,7 @@ static void collectstring (lua_State *L, int limit) {
 
 static void markall (lua_State *L) {
   travstack(L); /* mark stack objects */
-  travglobal(L);  /* mark global variable values and names */
+  hashmark(L, L->gt);  /* mark global variable values and names */
   travlock(L); /* mark locked objects */
   luaT_travtagmethods(L, markobject);  /* mark tag methods */
 }
-- 
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