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detail (extra byte in LUAI_EXTRASPACE to test proper alignment of 

a lua_State)
This commit is contained in:
Roberto Ierusalimschy 2014-07-23 14:16:50 -03:00
parent 753f2c1da4
commit 55a710545c
1 changed files with 3 additions and 2 deletions
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5
ltests.h
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@ -1,5 +1,5 @@
/*
** $Id: ltests.h,v 2.35 2014/07/18 13:27:45 roberto Exp roberto $
** $Id: ltests.h,v 2.36 2014/07/23 16:47:47 roberto Exp roberto $
** Internal Header for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
@ -64,7 +64,8 @@ int lua_checkmemory (lua_State *L);
/* test for lock/unlock */
struct L_EXTRA { int lock; int *plock; };
#define LUAI_EXTRASPACE sizeof(struct L_EXTRA)
/* extra space before a Lua state (+1 to make it unaligned) */
#define LUAI_EXTRASPACE (sizeof(struct L_EXTRA) + 1)
#define getlock(l) (cast(struct L_EXTRA *, l) - 1)
#define luai_userstateopen(l) \
(getlock(l)->lock = 0, getlock(l)->plock = &(getlock(l)->lock))