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/*
** State and stack handling.
** Copyright (C) 2005-2009 Mike Pall. See Copyright Notice in luajit.h
*/
#ifndef _LJ_STATE_H
#define _LJ_STATE_H
#include "lj_obj.h"
#define incr_top(L) \
(++L->top >= L->maxstack && (lj_state_growstack1(L), 0))
#define savestack(L, p) ((char *)(p) - (char *)L->stack)
#define restorestack(L, n) ((TValue *)((char *)L->stack + (n)))
LJ_FUNC void lj_state_relimitstack(lua_State *L);
LJ_FUNC void lj_state_shrinkstack(lua_State *L, MSize used);
LJ_FUNCA void lj_state_growstack(lua_State *L, MSize need);
LJ_FUNCA void lj_state_growstack1(lua_State *L);
static LJ_AINLINE void lj_state_checkstack(lua_State *L, MSize need)
{
if ((MSize)((char *)L->maxstack-(char *)L->top) <= need*(MSize)sizeof(TValue))
lj_state_growstack(L, need);
}
LJ_FUNC lua_State *lj_state_new(lua_State *L);
LJ_FUNC void LJ_FASTCALL lj_state_free(global_State *g, lua_State *L);
#endif
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