forked from mia/Aegisub
168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
/*
|
|
** $Id: lstate.h,v 2.24 2006/02/06 18:27:59 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;
|
|
CallInfo *ci; /* call info for current function */
|
|
const Instruction *savedpc; /* `savedpc' of current function */
|
|
StkId stack_last; /* last free slot in the stack */
|
|
StkId stack; /* stack base */
|
|
CallInfo *end_ci; /* points after end of ci array*/
|
|
CallInfo *base_ci; /* array of CallInfo's */
|
|
int stacksize;
|
|
int size_ci; /* size of array `base_ci' */
|
|
unsigned short nCcalls; /* number of nested C calls */
|
|
lu_byte hookmask;
|
|
lu_byte allowhook;
|
|
int basehookcount;
|
|
int hookcount;
|
|
lua_Hook hook;
|
|
TValue l_gt; /* table of globals */
|
|
TValue env; /* temporary place for environments */
|
|
GCObject *openupval; /* list of open upvalues in this stack */
|
|
GCObject *gclist;
|
|
struct lua_longjmp *errorJmp; /* current error recover point */
|
|
ptrdiff_t errfunc; /* current error handling function (stack index) */
|
|
};
|
|
|
|
|
|
#define G(L) (L->l_G)
|
|
|
|
|
|
/*
|
|
** Union of all collectable objects
|
|
*/
|
|
union GCObject {
|
|
GCheader gch;
|
|
union TString ts;
|
|
union Udata u;
|
|
union Closure cl;
|
|
struct Table h;
|
|
struct Proto p;
|
|
struct UpVal uv;
|
|
struct lua_State th; /* thread */
|
|
};
|
|
|
|
|
|
/* macros to convert a GCObject into a specific value */
|
|
#define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
|
|
#define gco2ts(o) (&rawgco2ts(o)->tsv)
|
|
#define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
|
|
#define gco2u(o) (&rawgco2u(o)->uv)
|
|
#define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
|
|
#define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
|
|
#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
|
|
#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
|
|
#define ngcotouv(o) \
|
|
check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
|
|
#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
|
|
|
|
/* macro to convert any Lua object into a GCObject */
|
|
#define obj2gco(v) (cast(GCObject *, (v)))
|
|
|
|
|
|
LUAI_FUNC lua_State *luaE_newthread (lua_State *L);
|
|
LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
|
|
|
|
#endif
|
|
|