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generated by cgit v1.2.3 (git 2.39.1) at 2025-01-09 08:47:35 +0000
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/*
** $Id: lstate.h,v 2.24.1.2 2008/01/03 15:20:39 roberto Exp $
** Global State
** See Copyright Notice in lua.h
*/

#ifndef lstate_h
#define lstate_h

#include "lua.h"

#include "lobject.h"
#include "ltm.h"
#include "lzio.h"



struct lua_longjmp;  /* defined in ldo.c */


/* table of globals */
#define gt(L)	(&L->l_gt)

/* registry */
#define registry(L)	(&G(L)->l_registry)


/* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK   5


#define BASIC_CI_SIZE           8

#define BASIC_STACK_SIZE        (2*LUA_MINSTACK)



typedef struct stringtable {
  GCObject **hash;
  lu_int32 nuse;  /* number of elements */
  int size;
} stringtable;


/*
** informations about a call
*/
typedef struct CallInfo {
  StkId base;  /* base for this function */
  StkId func;  /* function index in the stack */
  StkId	top;  /* top for this function */
  const Instruction *savedpc;
  int nresults;  /* expected number of results from this function */
  int tailcalls;  /* number of tail calls lost under this entry */
} CallInfo;



#define curr_func(L)	(clvalue(L->ci->func))
#define ci_func(ci)	(clvalue((ci)->func))
#define f_isLua(ci)	(!ci_func(ci)->c.isC)
#define isLua(ci)	(ttisfunction((ci)->func) && f_isLua(ci))


/*
** `global state', shared by all threads of this state
*/
typedef struct global_State {
  stringtable strt;  /* hash table for strings */
  lua_Alloc frealloc;  /* function to reallocate memory */
  void *ud;         /* auxiliary data to `frealloc' */
  lu_byte currentwhite;
  lu_byte gcstate;  /* state of garbage collector */
  int sweepstrgc;  /* position of sweep in `strt' */
  GCObject *rootgc;  /* list of all collectable objects */
  GCObject **sweepgc;  /* position of sweep in `rootgc' */
  GCObject *gray;  /* list of gray objects */
  GCObject *grayagain;  /* list of objects to be traversed atomically */
  GCObject *weak;  /* list of weak tables (to be cleared) */
  GCObject *tmudata;  /* last element of list of userdata to be GC */
  Mbuffer buff;  /* temporary buffer for string concatentation */
  lu_mem GCthreshold;
  lu_mem totalbytes;  /* number of bytes currently allocated */
  lu_mem estimate;  /* an estimate of number of bytes actually in use */
  lu_mem gcdept;  /* how much GC is `behind schedule' */
  int gcpause;  /* size of pause between successive GCs */
  int gcstepmul;  /* GC `granularity' */
  lua_CFunction panic;  /* to be called in unprotected errors */
  TValue l_registry;
  struct lua_State *mainthread;
  UpVal uvhead;  /* head of double-linked list of all open upvalues */
  struct Table *mt[NUM_TAGS];  /* metatables for basic types */
  TString *tmname[TM_N];  /* array with tag-method names */
} global_State;


/*
** `per thread' state
*/
struct lua_State {
  CommonHeader;
  lu_byte status;
  StkId top;  /* first free slot in the stack */
  StkId base;  /* base of current function */
  global_State *l_G;