From 426d3e43bdec4b1ab2b0aed1844396c27f64872f Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 2 Feb 2001 13:13:05 -0200
Subject: [PATCH] lock/unlock may use L + better structure for internal debug
 stuff

---
 lapi.c    | 206 +++++++++++++++++++++++++++---------------------------
 ldebug.c  |  26 +++----
 ldo.c     |  24 +++----
 lgc.c     |  17 ++++-
 lmem.h    |  10 +--
 lobject.c |   5 +-
 lobject.h |  17 ++---
 lstate.c  |  75 ++++++++------------
 lstate.h  |  14 +---
 ltests.c  |  23 ++++--
 ltm.c     |  14 ++--
 lvm.c     |   6 +-
 12 files changed, 213 insertions(+), 224 deletions(-)

diff --git a/lapi.c b/lapi.c
index 7a4b3d44..387f7a21 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 1.123 2001/02/01 13:56:49 roberto Exp roberto $
+** $Id: lapi.c,v 1.124 2001/02/01 16:03:38 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -55,9 +55,9 @@ void luaA_pushobject (lua_State *L, const TObject *o) {
 
 LUA_API int lua_stackspace (lua_State *L) {
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   i = (L->stack_last - L->top);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
@@ -70,49 +70,49 @@ LUA_API int lua_stackspace (lua_State *L) {
 
 LUA_API int lua_gettop (lua_State *L) {
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   i = (L->top - L->Cbase);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
 
 LUA_API void lua_settop (lua_State *L, int index) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (index >= 0)
     luaD_adjusttop(L, L->Cbase, index);
   else
     L->top = L->top+index+1;  /* index is negative */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_remove (lua_State *L, int index) {
   StkId p;
-  LUA_LOCK;
+  LUA_LOCK(L);
   p = luaA_index(L, index);
   while (++p < L->top) setobj(p-1, p);
   L->top--;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_insert (lua_State *L, int index) {
   StkId p;
   StkId q;
-  LUA_LOCK;
+  LUA_LOCK(L);
   p = luaA_index(L, index);
   for (q = L->top; q>p; q--) setobj(q, q-1);
   setobj(p, L->top);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_pushvalue (lua_State *L, int index) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   setobj(L->top, luaA_index(L, index));
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -125,19 +125,19 @@ LUA_API void lua_pushvalue (lua_State *L, int index) {
 LUA_API int lua_type (lua_State *L, int index) {
   StkId o;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   i = (o == NULL) ? LUA_TNONE : ttype(o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
 
 LUA_API const char *lua_typename (lua_State *L, int t) {
   const char *s;
-  LUA_LOCK;
+  LUA_LOCK(L);
   s = (t == LUA_TNONE) ? "no value" : basictypename(G(L), t);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return s;
 }
 
@@ -145,10 +145,10 @@ LUA_API const char *lua_typename (lua_State *L, int t) {
 LUA_API const char *lua_xtype (lua_State *L, int index) {
   StkId o;
   const char *type;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   type = (o == NULL) ? "no value" : luaT_typename(G(L), o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return type;
 }
 
@@ -156,20 +156,20 @@ LUA_API const char *lua_xtype (lua_State *L, int index) {
 LUA_API int lua_iscfunction (lua_State *L, int index) {
   StkId o;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   i = (o == NULL) ? 0 : iscfunction(o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
 LUA_API int lua_isnumber (lua_State *L, int index) {
   TObject *o;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   i = (o == NULL) ? 0 : (tonumber(o) == 0);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
@@ -182,34 +182,34 @@ LUA_API int lua_isstring (lua_State *L, int index) {
 LUA_API int lua_tag (lua_State *L, int index) {
   StkId o;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   i = (o == NULL) ? LUA_NOTAG : luaT_tag(o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
 LUA_API int lua_equal (lua_State *L, int index1, int index2) {
   StkId o1, o2;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o1 = luaA_indexAcceptable(L, index1);
   o2 = luaA_indexAcceptable(L, index2);
   i = (o1 == NULL || o2 == NULL) ? 0  /* index out-of-range */
                                  : luaO_equalObj(o1, o2);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
 LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
   StkId o1, o2;
   int i;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o1 = luaA_indexAcceptable(L, index1);
   o2 = luaA_indexAcceptable(L, index2);
   i = (o1 == NULL || o2 == NULL) ? 0  /* index out-of-range */
                                  : luaV_lessthan(L, o1, o2, L->top);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return i;
 }
 
@@ -218,58 +218,58 @@ LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
 LUA_API lua_Number lua_tonumber (lua_State *L, int index) {
   StkId o;
   lua_Number n;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   n = (o == NULL || tonumber(o)) ? 0 : nvalue(o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return n;
 }
 
 LUA_API const char *lua_tostring (lua_State *L, int index) {
   StkId o;
   const char *s;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   s = (o == NULL || tostring(L, o)) ? NULL : svalue(o);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return s;
 }
 
 LUA_API size_t lua_strlen (lua_State *L, int index) {
   StkId o;
   size_t l;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   l = (o == NULL || tostring(L, o)) ? 0 : tsvalue(o)->len;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return l;
 }
 
 LUA_API lua_CFunction lua_tocfunction (lua_State *L, int index) {
   StkId o;
   lua_CFunction f;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   f = (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->f.c;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return f;
 }
 
 LUA_API void *lua_touserdata (lua_State *L, int index) {
   StkId o;
   void *p;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   p = (o == NULL || ttype(o) != LUA_TUSERDATA) ? NULL :
                                                     tsvalue(o)->u.d.value;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return p;
 }
 
 LUA_API const void *lua_topointer (lua_State *L, int index) {
   StkId o;
   const void *p;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = luaA_indexAcceptable(L, index);
   if (o == NULL) p = NULL;
   else {
@@ -285,7 +285,7 @@ LUA_API const void *lua_topointer (lua_State *L, int index) {
         break;
     }
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return p;
 }
 
@@ -297,26 +297,26 @@ LUA_API const void *lua_topointer (lua_State *L, int index) {
 
 
 LUA_API void lua_pushnil (lua_State *L) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   setnilvalue(L->top);
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   setnvalue(L->top, n);
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   setsvalue(L->top, luaS_newlstr(L, s, len));
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -329,20 +329,20 @@ LUA_API void lua_pushstring (lua_State *L, const char *s) {
 
 
 LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   luaV_Cclosure(L, fn, n);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_pushusertag (lua_State *L, void *u, int tag) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   /* ORDER LUA_T */
   if (!(tag == LUA_ANYTAG || tag == LUA_TUSERDATA || validtag(G(L), tag)))
     luaO_verror(L, "invalid tag for a userdata (%d)", tag);
   setuvalue(L->top, luaS_createudata(L, u, tag));
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -353,54 +353,54 @@ LUA_API void lua_pushusertag (lua_State *L, void *u, int tag) {
 
 
 LUA_API void lua_getglobal (lua_State *L, const char *name) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   luaV_getglobal(L, luaS_new(L, name), L->top);
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_gettable (lua_State *L, int index) {
   StkId t;
-  LUA_LOCK;
+  LUA_LOCK(L);
   t = Index(L, index);
   luaV_gettable(L, t, L->top, L->top-1);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_rawget (lua_State *L, int index) {
   StkId t;
-  LUA_LOCK;
+  LUA_LOCK(L);
   t = Index(L, index);
   lua_assert(ttype(t) == LUA_TTABLE);
   setobj(L->top - 1, luaH_get(hvalue(t), L->top - 1));
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_rawgeti (lua_State *L, int index, int n) {
   StkId o;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = Index(L, index);
   lua_assert(ttype(o) == LUA_TTABLE);
   setobj(L->top, luaH_getnum(hvalue(o), n));
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_getglobals (lua_State *L) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   sethvalue(L->top, L->gt);
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API int lua_getref (lua_State *L, int ref) {
   int status = 1;
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (ref == LUA_REFNIL) {
     setnilvalue(L->top);
     api_incr_top(L);
@@ -412,16 +412,16 @@ LUA_API int lua_getref (lua_State *L, int ref) {
   }
   else
     status = 0;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return status;
 }
 
 
 LUA_API void lua_newtable (lua_State *L) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   sethvalue(L->top, luaH_new(L, 0));
   api_incr_top(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -432,58 +432,58 @@ LUA_API void lua_newtable (lua_State *L) {
 
 
 LUA_API void lua_setglobal (lua_State *L, const char *name) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   luaV_setglobal(L, luaS_new(L, name), L->top);
   L->top--;  /* remove element from the top */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_settable (lua_State *L, int index) {
   StkId t;
-  LUA_LOCK;
+  LUA_LOCK(L);
   t = Index(L, index);
   luaV_settable(L, t, L->top - 2, L->top);
   L->top -= 2;  /* pop index and value */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_rawset (lua_State *L, int index) {
   StkId t;
-  LUA_LOCK;
+  LUA_LOCK(L);
   t = Index(L, index);
   lua_assert(ttype(t) == LUA_TTABLE);
   setobj(luaH_set(L, hvalue(t), L->top-2), (L->top-1));
   L->top -= 2;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_rawseti (lua_State *L, int index, int n) {
   StkId o;
-  LUA_LOCK;
+  LUA_LOCK(L);
   o = Index(L, index);
   lua_assert(ttype(o) == LUA_TTABLE);
   setobj(luaH_setnum(L, hvalue(o), n), (L->top-1));
   L->top--;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_setglobals (lua_State *L) {
   StkId newtable;
-  LUA_LOCK;
+  LUA_LOCK(L);
   newtable = --L->top;
   lua_assert(ttype(newtable) == LUA_TTABLE);
   L->gt = hvalue(newtable);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API int lua_ref (lua_State *L,  int lock) {
   int ref;
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (ttype(L->top-1) == LUA_TNIL)
     ref = LUA_REFNIL;
   else {
@@ -500,7 +500,7 @@ LUA_API int lua_ref (lua_State *L,  int lock) {
     G(L)->refArray[ref].st = lock ? LOCK : HOLD;
   }
   L->top--;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return ref;
 }
 
@@ -511,9 +511,9 @@ LUA_API int lua_ref (lua_State *L,  int lock) {
 */
 
 LUA_API void lua_rawcall (lua_State *L, int nargs, int nresults) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   luaD_call(L, L->top-(nargs+1), nresults);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -527,28 +527,28 @@ LUA_API void lua_rawcall (lua_State *L, int nargs, int nresults) {
 
 LUA_API int lua_getgcthreshold (lua_State *L) {
   int threshold;
-  LUA_LOCK;
+  LUA_LOCK(L);
   threshold = GCscale(G(L)->GCthreshold);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return threshold;
 }
 
 LUA_API int lua_getgccount (lua_State *L) {
   int count;
-  LUA_LOCK;
+  LUA_LOCK(L);
   count = GCscale(G(L)->nblocks);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return count;
 }
 
 LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (newthreshold > GCscale(ULONG_MAX))
     G(L)->GCthreshold = ULONG_MAX;
   else
     G(L)->GCthreshold = GCunscale(newthreshold);
   luaC_checkGC(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -558,7 +558,7 @@ LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
 
 LUA_API int lua_newtype (lua_State *L, const char *name, int basictype) {
   int tag;
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (basictype != LUA_TNONE &&
       basictype != LUA_TTABLE &&
       basictype != LUA_TUSERDATA)
@@ -566,7 +566,7 @@ LUA_API int lua_newtype (lua_State *L, const char *name, int basictype) {
   tag = luaT_newtag(L, name, basictype);
   if (tag == LUA_TNONE)
     luaO_verror(L, "type name '%.30s' already exists", name);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return tag;
 }
 
@@ -574,7 +574,7 @@ LUA_API int lua_newtype (lua_State *L, const char *name, int basictype) {
 LUA_API int lua_type2tag (lua_State *L, const char *name) {
   int tag;
   const TObject *v;
-  LUA_LOCK;
+  LUA_LOCK(L);
   v = luaH_getstr(G(L)->type2tag, luaS_new(L, name));
   if (ttype(v) == LUA_TNIL)
     tag = LUA_TNONE;
@@ -582,14 +582,14 @@ LUA_API int lua_type2tag (lua_State *L, const char *name) {
     lua_assert(ttype(v) == LUA_TNUMBER);
     tag = (int)nvalue(v);
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return tag;
 }
 
 
 LUA_API void lua_settag (lua_State *L, int tag) {
   int basictype;
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (tag < 0 || tag >= G(L)->ntag)
     luaO_verror(L, "%d is not a valid tag", tag);
   basictype = G(L)->TMtable[tag].basictype;
@@ -607,25 +607,25 @@ LUA_API void lua_settag (lua_State *L, int tag) {
       luaO_verror(L, "cannot change the tag of a %.20s",
                   luaT_typename(G(L), L->top-1));
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_error (lua_State *L, const char *s) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   luaD_error(L, s);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_unref (lua_State *L, int ref) {
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (ref >= 0) {
     lua_assert(ref < G(L)->nref && G(L)->refArray[ref].st < 0);
     G(L)->refArray[ref].st = G(L)->refFree;
     G(L)->refFree = ref;
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
@@ -633,7 +633,7 @@ LUA_API int lua_next (lua_State *L, int index) {
   StkId t;
   Node *n;
   int more;
-  LUA_LOCK;
+  LUA_LOCK(L);
   t = luaA_index(L, index);
   lua_assert(ttype(t) == LUA_TTABLE);
   n = luaH_next(L, hvalue(t), luaA_index(L, -1));
@@ -647,7 +647,7 @@ LUA_API int lua_next (lua_State *L, int index) {
     L->top -= 1;  /* remove key */
     more = 0;
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return more;
 }
 
@@ -656,7 +656,7 @@ LUA_API int lua_getn (lua_State *L, int index) {
   Hash *h;
   const TObject *value;
   int n;
-  LUA_LOCK;
+  LUA_LOCK(L);
   h = hvalue(luaA_index(L, index));
   value = luaH_getstr(h, luaS_newliteral(L, "n"));  /* = h.n */
   if (ttype(value) == LUA_TNUMBER)
@@ -674,32 +674,32 @@ LUA_API int lua_getn (lua_State *L, int index) {
     }
     n = (int)max;
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return n;
 }
 
 
 LUA_API void lua_concat (lua_State *L, int n) {
   StkId top;
-  LUA_LOCK;
+  LUA_LOCK(L);
   top = L->top;
   luaV_strconc(L, n, top);
   L->top = top-(n-1);
   luaC_checkGC(L);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
   TString *ts;
   void *p;
-  LUA_LOCK;
+  LUA_LOCK(L);
   if (size == 0) size = 1;
   ts = luaS_newudata(L, size, NULL);
   setuvalue(L->top, ts);
   api_incr_top(L);
   p = ts->u.d.value;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return p;
 }
 
diff --git a/ldebug.c b/ldebug.c
index a914edfd..0cb93494 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 1.57 2001/01/26 11:45:51 roberto Exp roberto $
+** $Id: ldebug.c,v 1.58 2001/01/29 17:16:58 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -42,20 +42,20 @@ static int isLmark (StkId o) {
 
 LUA_API lua_Hook lua_setcallhook (lua_State *L, lua_Hook func) {
   lua_Hook oldhook;
-  LUA_LOCK;
+  LUA_LOCK(L);
   oldhook = L->callhook;
   L->callhook = func;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return oldhook;
 }
 
 
 LUA_API lua_Hook lua_setlinehook (lua_State *L, lua_Hook func) {
   lua_Hook oldhook;
-  LUA_LOCK;
+  LUA_LOCK(L);
   oldhook = L->linehook;
   L->linehook = func;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return oldhook;
 }
 
@@ -76,14 +76,14 @@ static StkId aux_stackedfunction (lua_State *L, int level, StkId top) {
 LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
   StkId f;
   int status;
-  LUA_LOCK;
+  LUA_LOCK(L);
   f = aux_stackedfunction(L, level, L->top);
   if (f == NULL) status = 0;  /* there is no such level */
   else {
     ar->_func = f;
     status = 1;
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return status;
 }
 
@@ -162,7 +162,7 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
   const char *name;
   StkId f;
   Proto *fp;
-  LUA_LOCK;
+  LUA_LOCK(L);
   name = NULL;
   f = ar->_func;
   fp = getluaproto(f);
@@ -171,7 +171,7 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
     if (name)
       luaA_pushobject(L, (f+1)+(n-1));  /* push value */
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return name;
 }
 
@@ -180,7 +180,7 @@ LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
   const char *name;
   StkId f;
   Proto *fp;
-  LUA_LOCK;
+  LUA_LOCK(L);
   name = NULL;
   f = ar->_func;
   fp = getluaproto(f);
@@ -192,7 +192,7 @@ LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
     else
       setobj((f+1)+(n-1), L->top);
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return name;
 }
 
@@ -272,7 +272,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
   StkId func;
   int isactive;
   int status = 1;
-  LUA_LOCK;
+  LUA_LOCK(L);
   isactive = (*what != '>');
   if (isactive)
     func = ar->_func;
@@ -309,7 +309,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
     }
   }
   if (!isactive) L->top--;  /* pop function */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return status;
 }
 
diff --git a/ldo.c b/ldo.c
index d98ab5bd..296352fe 100644
--- a/ldo.c
+++ b/ldo.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.119 2001/01/29 19:34:02 roberto Exp roberto $
+** $Id: ldo.c,v 1.120 2001/02/01 17:40:48 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -94,9 +94,9 @@ static void dohook (lua_State *L, lua_Debug *ar, lua_Hook hook) {
   StkId old_top = L->Cbase = L->top;
   luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
   L->allowhooks = 0;  /* cannot call hooks inside a hook */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   (*hook)(L, ar);
-  LUA_LOCK;
+  LUA_LOCK(L);
   lua_assert(L->allowhooks == 0);
   L->allowhooks = 1;
   L->top = old_top;
@@ -135,9 +135,9 @@ static StkId callCclosure (lua_State *L, const struct Closure *cl, StkId base) {
   luaD_checkstack(L, nup+LUA_MINSTACK);  /* ensure minimum stack size */
   for (n=0; n<nup; n++)  /* copy upvalues as extra arguments */
     setobj(L->top++, &cl->upvalue[n]);
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   n = (*cl->f.c)(L);  /* do the actual call */
-  LUA_LOCK;
+  LUA_LOCK(L);
   L->Cbase = old_Cbase;  /* restore old C base */
   return L->top - n;  /* return index of first result */
 }
@@ -219,13 +219,13 @@ LUA_API int lua_call (lua_State *L, int nargs, int nresults) {
   StkId func;
   struct CallS c;
   int status;
-  LUA_LOCK;
+  LUA_LOCK(L);
   func = L->top - (nargs+1);  /* function to be called */
   c.func = func; c.nresults = nresults;
   status = luaD_runprotected(L, f_call, &c);
   if (status != 0)  /* an error occurred? */
     L->top = func;  /* remove parameters from the stack */
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return status;
 }
 
@@ -233,23 +233,23 @@ LUA_API int lua_call (lua_State *L, int nargs, int nresults) {
 /*
 ** Execute a protected parser.
 */
-struct ParserS {  /* data to `f_parser' */
+struct SParser {  /* data to `f_parser' */
   ZIO *z;
   int bin;
 };
 
 static void f_parser (lua_State *L, void *ud) {
-  struct ParserS *p = (struct ParserS *)ud;
+  struct SParser *p = (struct SParser *)ud;
   Proto *tf = p->bin ? luaU_undump(L, p->z) : luaY_parser(L, p->z);
   luaV_Lclosure(L, tf, 0);
 }
 
 
 static int protectedparser (lua_State *L, ZIO *z, int bin) {
-  struct ParserS p;
+  struct SParser p;
   mem_int old_blocks;
   int status;
-  LUA_LOCK;
+  LUA_LOCK(L);
   p.z = z; p.bin = bin;
   luaC_checkGC(L);
   old_blocks = G(L)->nblocks;
@@ -261,7 +261,7 @@ static int protectedparser (lua_State *L, ZIO *z, int bin) {
   }
   else if (status == LUA_ERRRUN)  /* an error occurred: correct error code */
     status = LUA_ERRSYNTAX;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return status;
 }
 
diff --git a/lgc.c b/lgc.c
index 90c8165a..d980d8e8 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 1.83 2001/01/29 19:34:02 roberto Exp roberto $
+** $Id: lgc.c,v 1.84 2001/02/01 17:40:48 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -17,6 +17,19 @@
 #include "ltm.h"
 
 
+/*
+** optional "lock" for GC
+** (when Lua calls GC tag methods it unlocks the regular lock)
+*/
+#ifndef LUA_LOCKGC
+#define LUA_LOCKGC(L)		{
+#endif
+
+#ifndef LUA_UNLOCKGC
+#define LUA_UNLOCKGC(L)		}
+#endif
+
+
 typedef struct GCState {
   Hash *tmark;  /* list of marked tables to be visited */
   Closure *cmark;  /* list of marked closures to be visited */
@@ -351,12 +364,14 @@ static void callgcTMudata (lua_State *L) {
 
 
 void luaC_collect (lua_State *L, int all) {
+  LUA_LOCKGC(L);
   collectudata(L, all);
   callgcTMudata(L);
   collectstrings(L, all);
   collecttable(L);
   collectproto(L);
   collectclosure(L);
+  LUA_UNLOCKGC(L);
 }
 
 
diff --git a/lmem.h b/lmem.h
index d33473c7..c6f94e53 100644
--- a/lmem.h
+++ b/lmem.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h,v 1.18 2000/12/26 18:46:09 roberto Exp roberto $
+** $Id: lmem.h,v 1.19 2000/12/28 12:55:41 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -38,13 +38,5 @@ void *luaM_growaux (lua_State *L, void *block, int *size, int size_elem,
                                     (luint32)(n)*(luint32)sizeof(t)))
 
 
-#ifdef LUA_DEBUG
-extern mem_int memdebug_numblocks;
-extern mem_int memdebug_total;
-extern mem_int memdebug_maxmem;
-extern mem_int memdebug_memlimit;
-#endif
-
-
 #endif
 
diff --git a/lobject.c b/lobject.c
index 9dc413d8..7bc96e90 100644
--- a/lobject.c
+++ b/lobject.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 1.62 2001/01/26 14:16:35 roberto Exp roberto $
+** $Id: lobject.c,v 1.63 2001/01/29 19:34:02 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -19,8 +19,7 @@
 
 
 
-const char luaO_ttnil = LUA_TNIL;
-const TObject luaO_nilobject = {LUA_TNIL, {(void *)&luaO_ttnil}};
+const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
 
 
 /*
diff --git a/lobject.h b/lobject.h
index e1170615..447b3622 100644
--- a/lobject.h
+++ b/lobject.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 1.91 2001/01/29 19:34:02 roberto Exp roberto $
+** $Id: lobject.h,v 1.92 2001/02/01 17:40:48 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -12,19 +12,12 @@
 #include "lua.h"
 
 
-#ifdef LUA_DEBUG
-#undef NDEBUG
-#include <assert.h>
-#define lua_assert(c)		assert(c)
-#else
+#ifndef lua_assert
 #define lua_assert(c)		/* empty */
 #endif
 
 
-#ifdef LUA_DEBUG
-/* to avoid warnings, and make sure value is really unused */
-#define UNUSED(x)	(x=0, (void)(x))
-#else
+#ifndef UNUSED
 #define UNUSED(x)	((void)(x))	/* to avoid warnings */
 #endif
 
@@ -88,8 +81,7 @@ typedef struct lua_TObject {
   { TObject *_o=(obj); struct CallInfo *_v=(x); \
     _o->tt=LUA_TMARK; _o->value.v=_v; }
 
-#define setnilvalue(obj) \
-  { TObject *_o=(obj); _o->tt=LUA_TNIL; _o->value.v = (void *)&luaO_ttnil; }
+#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
 
 #define setobj(obj1,obj2) \
   { TObject *o1=(obj1); const TObject *o2=(obj2); \
@@ -220,7 +212,6 @@ typedef struct CallInfo {
 } CallInfo;
 
 
-extern const char luaO_ttnil;  /* "address" of the nil value */
 extern const TObject luaO_nilobject;
 
 
diff --git a/lstate.c b/lstate.c
index fd4edff5..9fb89a8d 100644
--- a/lstate.c
+++ b/lstate.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c,v 1.54 2001/01/25 16:45:36 roberto Exp roberto $
+** $Id: lstate.c,v 1.55 2001/01/26 11:45:51 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -19,33 +19,27 @@
 #include "ltm.h"
 
 
-#ifdef LUA_DEBUG
-static lua_State *lua_state = NULL;
-void luaB_opentests (lua_State *L);
-int islocked = 0;
-#endif
-
-
-/*
-** built-in implementation for ERRORMESSAGE. In a "correct" environment
-** ERRORMESSAGE should have an external definition, and so this function
-** would not be used.
-*/
-static int errormessage (lua_State *L) {
-  const char *s = lua_tostring(L, 1);
-  if (s == NULL) s = "(no message)";
-  fprintf(stderr, "error: %s\n", s);
-  return 0;
-}
-
-
 struct Sopen {
   int stacksize;
   lua_State *L;
 };
 
 
-static void close_state (lua_State *L);
+static void close_state (lua_State *L, lua_State *OL);
+
+
+/*
+** initialize ref array and registry
+*/
+#define INIT_REFSIZE	4
+
+static void ref_init (lua_State *L) {
+  G(L)->refArray = luaM_newvector(L, INIT_REFSIZE, struct Ref);
+  G(L)->sizeref = INIT_REFSIZE;
+  sethvalue(&G(L)->refArray[0].o, luaH_new(L, 0));
+  G(L)->refArray[0].st = LOCK;
+  G(L)->nref = 1;
+}
 
 
 /*
@@ -90,17 +84,8 @@ static void f_luaopen (lua_State *L, void *ud) {
     luaS_init(L);
     luaX_init(L);
     luaT_init(L);
+    ref_init(L);
     G(L)->GCthreshold = 4*G(L)->nblocks;
-    LUA_UNLOCK;  /* temporary exit to use the API */
-    lua_newtable(L);
-    lua_ref(L, 1);  /* create registry */
-    lua_register(L, LUA_ERRORMESSAGE, errormessage);
-#ifdef LUA_DEBUG
-    luaB_opentests(L);
-    if (lua_state == NULL) lua_state = L;  /* keep first state to be opened */
-    lua_assert(lua_gettop(L) == 0);
-#endif
-    LUA_LOCK;  /* go back inside */
   }
 }
 
@@ -108,7 +93,7 @@ static void f_luaopen (lua_State *L, void *ud) {
 LUA_API lua_State *lua_open (lua_State *OL, int stacksize) {
   struct Sopen so;
   lua_State *L;
-  LUA_LOCK;
+  if (OL) LUA_LOCK(OL);
   L = luaM_new(OL, lua_State);
   if (L) {  /* allocation OK? */
     L->G = NULL;
@@ -123,20 +108,17 @@ LUA_API lua_State *lua_open (lua_State *OL, int stacksize) {
     so.L = OL;
     if (luaD_runprotected(L, f_luaopen, &so) != 0) {
       /* memory allocation error: free partial state */
-      close_state(L);
+      close_state(L, OL);
       L = NULL;
     }
   }
-  LUA_UNLOCK;
+  if (OL) LUA_UNLOCK(OL);
   return L;
 }
 
 
-static void close_state (lua_State *L) {
-  lua_State *L1;
-  L1 = L->next;  /* any surviving thread (if there is one) */
-  if (L1 == L) L1 = NULL;  /* no surviving threads */
-  if (L1 != NULL) {  /* are there other threads? */
+static void close_state (lua_State *L, lua_State *OL) {
+  if (OL != NULL) {  /* are there other threads? */
     lua_assert(L->previous != L);
     L->previous->next = L->next;
     L->next->previous = L->previous;
@@ -152,15 +134,18 @@ static void close_state (lua_State *L) {
     luaM_freearray(L, G(L)->Mbuffer, G(L)->Mbuffsize, char);
     luaM_freelem(NULL, L->G, global_State);
   }
-  luaM_freearray(L1, L->stack, L->stacksize, TObject);
-  luaM_freelem(L1, L, lua_State);
+  luaM_freearray(OL, L->stack, L->stacksize, TObject);
+  luaM_freelem(OL, L, lua_State);
 }
 
 LUA_API void lua_close (lua_State *L) {
+  lua_State *OL;
   lua_assert(L != lua_state || lua_gettop(L) == 0);
-  LUA_LOCK;
-  close_state(L);
-  LUA_UNLOCK;
+  LUA_LOCK(L);
+  OL = L->next;  /* any surviving thread (if there is one) */
+  if (OL == L) OL = NULL;  /* no surviving threads */
+  close_state(L, OL);
+  if (OL) LUA_UNLOCK(OL);  /* cannot unlock over a freed state */
   lua_assert(L != lua_state || memdebug_numblocks == 0);
   lua_assert(L != lua_state || memdebug_total == 0);
 }
diff --git a/lstate.h b/lstate.h
index e4f52cec..ccac761c 100644
--- a/lstate.h
+++ b/lstate.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 1.48 2001/01/26 11:45:51 roberto Exp roberto $
+** $Id: lstate.h,v 1.49 2001/02/01 17:40:48 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -12,24 +12,16 @@
 #include "luadebug.h"
 
 
-
-#ifdef LUA_DEBUG
-extern int islocked;
-#define LUA_LOCK	lua_assert(islocked++ == 0)
-#define LUA_UNLOCK	lua_assert(--islocked == 0)
-#endif
-
-
 /*
 ** macros that control all entries and exits from Lua core machine
 ** (mainly for thread syncronization)
 */
 #ifndef LUA_LOCK
-#define LUA_LOCK
+#define LUA_LOCK(L)	((void) 0)
 #endif
 
 #ifndef LUA_UNLOCK
-#define LUA_UNLOCK
+#define LUA_UNLOCK(L)	((void) 0)
 #endif
 
 /*
diff --git a/ltests.c b/ltests.c
index 12a33cfe..814102ff 100644
--- a/ltests.c
+++ b/ltests.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 1.60 2001/01/29 17:16:58 roberto Exp roberto $
+** $Id: ltests.c,v 1.61 2001/02/01 16:03:38 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -28,14 +28,16 @@
 #include "lualib.h"
 
 
-void luaB_opentests (lua_State *L);
-
 
 /*
 ** The whole module only makes sense with LUA_DEBUG on
 */
 #ifdef LUA_DEBUG
 
+lua_State *lua_state = NULL;
+
+int islocked = 0;
+
 
 
 static void setnameval (lua_State *L, const char *name, int val) {
@@ -279,6 +281,7 @@ static int udataval (lua_State *L) {
 static int doonnewstack (lua_State *L) {
   lua_State *L1 = lua_open(L, luaL_check_int(L, 1));
   if (L1 == NULL) return 0;
+  *((int **)L1) = &islocked;  /* initialize the lock */
   lua_dostring(L1, luaL_check_string(L, 2));
   lua_pushnumber(L, 1);
   lua_close(L1);
@@ -288,8 +291,10 @@ static int doonnewstack (lua_State *L) {
 
 static int newstate (lua_State *L) {
   lua_State *L1 = lua_open(NULL, luaL_check_int(L, 1));
-  if (L1)
+  if (L1) {
+    *((int **)L1) = &islocked;  /* initialize the lock */
     lua_pushuserdata(L, L1);
+  }
   else
     lua_pushnil(L);
   return 1;
@@ -311,6 +316,7 @@ static int loadlib (lua_State *L) {
 static int closestate (lua_State *L) {
   luaL_checktype(L, 1, LUA_TUSERDATA);
   lua_close((lua_State *)lua_touserdata(L, 1));
+  LUA_UNLOCK(L);  /* close cannot unlock that */
   return 0;
 }
 
@@ -552,6 +558,9 @@ static const struct luaL_reg tests_funcs[] = {
 
 
 void luaB_opentests (lua_State *L) {
+  *((int **)L) = &islocked;  /* init lock */
+  lua_state = L;  /* keep first state to be opened */
+  /* open lib in a new table */
   lua_newtable(L);
   lua_getglobals(L);
   lua_pushvalue(L, -2);
@@ -559,6 +568,12 @@ void luaB_opentests (lua_State *L) {
   luaL_openl(L, tests_funcs);  /* open functions inside new table */
   lua_setglobals(L);  /* restore old table of globals */
   lua_setglobal(L, "T");  /* set new table as global T */
+  /* open other libraries */
+  lua_baselibopen(L);
+  lua_iolibopen(L);
+  lua_strlibopen(L);
+  lua_mathlibopen(L);
+  lua_dblibopen(L);
 }
 
 #endif
diff --git a/ltm.c b/ltm.c
index 1ccf9a5c..40e67887 100644
--- a/ltm.c
+++ b/ltm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 1.63 2001/01/25 16:45:36 roberto Exp roberto $
+** $Id: ltm.c,v 1.64 2001/01/26 11:45:51 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -111,14 +111,14 @@ static void checktag (lua_State *L, int tag) {
 
 LUA_API int lua_copytagmethods (lua_State *L, int tagto, int tagfrom) {
   int e;
-  LUA_LOCK;
+  LUA_LOCK(L);
   checktag(L, tagto);
   checktag(L, tagfrom);
   for (e=0; e<TM_N; e++) {
     if (luaT_validevent(tagto, e))
       luaT_gettm(G(L), tagto, e) = luaT_gettm(G(L), tagfrom, e);
   }
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
   return tagto;
 }
 
@@ -156,7 +156,7 @@ const char *luaT_typename (global_State *G, const TObject *o) {
 
 LUA_API void lua_gettagmethod (lua_State *L, int t, const char *event) {
   int e;
-  LUA_LOCK;
+  LUA_LOCK(L);
   e = luaI_checkevent(L, event, t);
   checktag(L, t);
   if (luaT_validevent(t, e) && luaT_gettm(G(L), t, e)) {
@@ -165,13 +165,13 @@ LUA_API void lua_gettagmethod (lua_State *L, int t, const char *event) {
   else
     setnilvalue(L->top);
   incr_top;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
 
 LUA_API void lua_settagmethod (lua_State *L, int t, const char *event) {
   int e;
-  LUA_LOCK;
+  LUA_LOCK(L);
   e = luaI_checkevent(L, event, t);
   checktag(L, t);
   if (!luaT_validevent(t, e))
@@ -190,6 +190,6 @@ LUA_API void lua_settagmethod (lua_State *L, int t, const char *event) {
       luaD_error(L, "tag method must be a function (or nil)");
   }
   L->top--;
-  LUA_UNLOCK;
+  LUA_UNLOCK(L);
 }
 
diff --git a/lvm.c b/lvm.c
index 86ce5792..9a9dc12a 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 1.162 2001/02/01 16:03:38 roberto Exp roberto $
+** $Id: lvm.c,v 1.163 2001/02/01 17:39:55 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -159,7 +159,7 @@ void luaV_settable (lua_State *L, StkId t, StkId key, StkId top) {
   }
   else {  /* try a `settable' tag method */
     Closure *tm = luaT_gettmbyObj(G(L), t, TM_SETTABLE);
-    L->top = top;
+    lua_assert(L->top == top);
     if (tm == NULL)  /* no tag method? */
       luaG_typeerror(L, t, "index");
     else {
@@ -206,7 +206,7 @@ void luaV_setglobal (lua_State *L, TString *s, StkId top) {
     setobj(oldvalue, top-1);  /* raw set */
   }
   else {  /* call tag method */
-    L->top = top;
+    lua_assert(L->top == top);
     luaD_checkstack(L, 3);
     setobj(top+2, top-1);  /* new value */
     setobj(top+1, oldvalue);  /* old value */