From e8d4fe72366dd44e45ffd9fca09d92c3db4f8214 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 2 Jun 2004 16:07:55 -0300
Subject: new macro `lua_threadyield' + lock stuff in `luaconf.h' + details

---
 luaconf.h | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'luaconf.h')

diff --git a/luaconf.h b/luaconf.h
index 476b8bc1..93793e55 100644
--- a/luaconf.h
+++ b/luaconf.h
@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.4 2004/05/28 18:32:51 roberto Exp roberto $
+** $Id: luaconf.h,v 1.5 2004/06/02 13:24:43 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -215,6 +215,32 @@
 #endif
 
 
+
+/*
+** macros for thread synchronization inside Lua core machine:
+** all accesses to the global state and to global objects are synchronized.
+** Because threads can read the stack of other threads
+** (when running garbage collection),
+** a thread must also synchronize any write-access to its own stack.
+** Unsynchronized accesses are allowed only when reading its own stack,
+** or when reading immutable fields from global objects
+** (such as string values and udata values).
+*/
+#define lua_lock(L)     ((void) 0)
+#define lua_unlock(L)   ((void) 0)
+
+/*
+** this macro allows a thread switch in appropriate places in the Lua
+** core
+*/
+#define lua_threadyield(L)	{lua_unlock(L); lua_lock(L);}
+
+
+
+/* allows user-specific initialization on new threads */
+#define lua_userstateopen(l)	/* empty */
+
+
 #endif
 
 /* }====================================================== */
-- 
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