lstate.h
上传用户:yisoukefu
上传日期:2020-08-09
资源大小:39506k
文件大小:5k
- /*
- ** $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