From ea2a75d19e260ad728d0b804d824c619bf2218d0 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 9 Jan 2002 19:51:06 -0200
Subject: [PATCH] new macro lua_userstateopen

---
 ltests.c | 9 ++++++++-
 ltests.h | 5 +++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/ltests.c b/ltests.c
index 33dc272a..72a448bd 100644
--- a/ltests.c
+++ b/ltests.c
@@ -254,6 +254,13 @@ static int hash_query (lua_State *L) {
 }
 
 
+static int Cstacklevel (lua_State *L) {
+  unsigned long a = 0;
+  lua_pushnumber(L, (unsigned long)&a);
+  return 1;
+}
+
+
 static int table_query (lua_State *L) {
   const Table *t;
   int i = luaL_opt_int(L, 2, -1);
@@ -368,7 +375,6 @@ static int udataval (lua_State *L) {
 static int doonnewstack (lua_State *L) {
   lua_State *L1 = lua_newthread(L, luaL_check_int(L, 1));
   if (L1 == NULL) return 0;
-  *cast(int **, L1) = &islocked;  /* initialize the lock */
   lua_dostring(L1, luaL_check_string(L, 2));
   lua_pushnumber(L, 1);
   lua_close(L1);
@@ -624,6 +630,7 @@ static const struct luaL_reg tests_funcs[] = {
   {"listk", listk},
   {"listlocals", listlocals},
   {"loadlib", loadlib},
+  {"Cstacklevel", Cstacklevel},
   {"querystr", string_query},
   {"querytab", table_query},
   {"testC", testC},
diff --git a/ltests.h b/ltests.h
index 859ca9ca..18b703a6 100644
--- a/ltests.h
+++ b/ltests.h
@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 1.8 2001/08/31 19:46:07 roberto Exp $
+** $Id: ltests.h,v 1.1 2001/11/29 22:14:34 rieru Exp rieru $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -41,8 +41,9 @@ void *debug_realloc (void *block, size_t oldsize, size_t size);
 
 
 /* test for lock/unlock */
-#define LUA_USERSTATE	int *lock;
 extern int islocked;
+#define LUA_USERSTATE	int *lock;
+#define lua_userstateopen(l) if (l != NULL) *cast(int **, l) = &islocked;
 #define lua_lock(L)     lua_assert((**cast(int **, L))++ == 0)
 #define lua_unlock(L)   lua_assert(--(**cast(int **, L)) == 0)