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'lua_lock' and similars should be hard to use

This commit is contained in:
Roberto Ierusalimschy 2005-08-04 10:37:10 -03:00
parent d8be9a6326
commit d96f088a26
2 changed files with 13 additions and 26 deletions
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12
llimits.h
View File

@ -1,5 +1,5 @@
/* /*
** $Id: llimits.h,v 1.64 2005/03/08 20:10:05 roberto Exp roberto $ ** $Id: llimits.h,v 1.65 2005/03/09 16:28:07 roberto Exp roberto $
** Limits, basic types, and some other `installation-dependent' definitions ** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -93,4 +93,14 @@ typedef lu_int32 Instruction;
#endif #endif
#ifndef lua_lock
#define lua_lock(L) ((void) 0)
#define lua_unlock(L) ((void) 0)
#endif
#ifndef luai_threadyield
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
#endif
#endif #endif

27
luaconf.h
View File

@ -1,5 +1,5 @@
/* /*
** $Id: luaconf.h,v 1.55 2005/07/11 17:10:35 roberto Exp roberto $ ** $Id: luaconf.h,v 1.56 2005/08/01 15:05:09 roberto Exp roberto $
** Configuration file for Lua ** Configuration file for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -552,7 +552,7 @@ union luai_Cast { double l_d; long l_l; };
** if want/don't want to use _longjmp/_setjmp instead of regular ** if want/don't want to use _longjmp/_setjmp instead of regular
** longjmp/setjmp. By default, Lua handles errors with exceptions when ** longjmp/setjmp. By default, Lua handles errors with exceptions when
* compiling as C++ code, with _longjmp/_setjmp when compiling as C code * compiling as C++ code, with _longjmp/_setjmp when compiling as C code
** in a Unix system, and with longjmp/setjmp otherwise. ** in some Unix systems, and with longjmp/setjmp otherwise.
*/ */
#if defined(__cplusplus) #if defined(__cplusplus)
/* C++ exceptions */ /* C++ exceptions */
@ -658,29 +658,6 @@ union luai_Cast { double l_d; long l_l; };
#endif #endif
/*
@@ lua_lock/lua_unlock are macros for thread synchronization inside the
@* Lua core. This is an attempt to simplify the implementation of a
@* multithreaded version of Lua.
** CHANGE them only if you know what you are doing. 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)
/*
@@ lua_threadyield allows a thread switch in appropriate places in the core.
** CHANGE it only if you know what you are doing. (See lua_lock.)
*/
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
/* /*
@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
@* (the data goes just *before* the lua_State pointer). @* (the data goes just *before* the lua_State pointer).