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/*
** $Id: lstate.h,v 1.30 2000/03/10 18:37:44 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
#ifndef lstate_h
#define lstate_h
#include <setjmp.h>
#include "lobject.h"
#include "lua.h"
#include "luadebug.h"
typedef TObject *StkId; /* index to stack elements */
/*
** `jmp_buf' may be an array, so it is better to make sure it has an
** address (and not that it *is* an address...)
*/
struct lua_longjmp {
jmp_buf b;
};
/*
** stack layout for C point of view:
** [lua2C, lua2C+num) - `array' lua2C
** [lua2C+num, base) - space for extra lua_Objects (limbo)
** [base, L->top) - `stack' C2Lua
*/
struct C_Lua_Stack {
StkId base;
StkId lua2C;
int num;
};
typedef struct stringtable {
int size;
int nuse; /* number of elements (including EMPTYs) */
TString **hash;
} stringtable;
struct lua_State {
/* thread-specific state */
StkId top; /* first free slot in the stack */
StkId stack; /* stack base */
StkId stack_last; /* last free slot in the stack */
int stacksize;
struct C_Lua_Stack Cstack; /* C2lua struct */
struct lua_longjmp *errorJmp; /* current error recover point */
char *Mbuffer; /* global buffer */
int Mbuffbase; /* current first position of Mbuffer */
int Mbuffsize; /* size of Mbuffer */
int Mbuffnext; /* next position to fill in Mbuffer */
struct C_Lua_Stack *Cblocks;
int numCblocks; /* number of nested Cblocks */
/* global state */
Proto *rootproto; /* list of all prototypes */
Closure *rootcl; /* list of all closures */
Hash *roottable; /* list of all tables */
GlobalVar *rootglobal; /* list of global variables */
stringtable *string_root; /* array of hash tables for strings and udata */
struct IM *IMtable; /* table for tag methods */
int last_tag; /* last used tag in IMtable */
struct Ref *refArray; /* locked objects */
int refSize; /* size of refArray */
int refFree; /* list of free positions in refArray */
unsigned long GCthreshold;
unsigned long nblocks; /* number of `blocks' currently allocated */
int debug;
lua_Hook callhook;
lua_Hook linehook;
int allowhooks;
};
#endif
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