1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/lua/lstate.h	Sat Mar 03 11:07:39 2012 -0600
     1.3 @@ -0,0 +1,169 @@
     1.4 +/*
     1.5 +** $Id: lstate.h,v 2.24.1.2 2008/01/03 15:20:39 roberto Exp $
     1.6 +** Global State
     1.7 +** See Copyright Notice in lua.h
     1.8 +*/
     1.9 +
    1.10 +#ifndef lstate_h
    1.11 +#define lstate_h
    1.12 +
    1.13 +#include "lua.h"
    1.14 +
    1.15 +#include "lobject.h"
    1.16 +#include "ltm.h"
    1.17 +#include "lzio.h"
    1.18 +
    1.19 +
    1.20 +
    1.21 +struct lua_longjmp;  /* defined in ldo.c */
    1.22 +
    1.23 +
    1.24 +/* table of globals */
    1.25 +#define gt(L)	(&L->l_gt)
    1.26 +
    1.27 +/* registry */
    1.28 +#define registry(L)	(&G(L)->l_registry)
    1.29 +
    1.30 +
    1.31 +/* extra stack space to handle TM calls and some other extras */
    1.32 +#define EXTRA_STACK   5
    1.33 +
    1.34 +
    1.35 +#define BASIC_CI_SIZE           8
    1.36 +
    1.37 +#define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
    1.38 +
    1.39 +
    1.40 +
    1.41 +typedef struct stringtable {
    1.42 +  GCObject **hash;
    1.43 +  lu_int32 nuse;  /* number of elements */
    1.44 +  int size;
    1.45 +} stringtable;
    1.46 +
    1.47 +
    1.48 +/*
    1.49 +** informations about a call
    1.50 +*/
    1.51 +typedef struct CallInfo {
    1.52 +  StkId base;  /* base for this function */
    1.53 +  StkId func;  /* function index in the stack */
    1.54 +  StkId	top;  /* top for this function */
    1.55 +  const Instruction *savedpc;
    1.56 +  int nresults;  /* expected number of results from this function */
    1.57 +  int tailcalls;  /* number of tail calls lost under this entry */
    1.58 +} CallInfo;
    1.59 +
    1.60 +
    1.61 +
    1.62 +#define curr_func(L)	(clvalue(L->ci->func))
    1.63 +#define ci_func(ci)	(clvalue((ci)->func))
    1.64 +#define f_isLua(ci)	(!ci_func(ci)->c.isC)
    1.65 +#define isLua(ci)	(ttisfunction((ci)->func) && f_isLua(ci))
    1.66 +
    1.67 +
    1.68 +/*
    1.69 +** `global state', shared by all threads of this state
    1.70 +*/
    1.71 +typedef struct global_State {
    1.72 +  stringtable strt;  /* hash table for strings */
    1.73 +  lua_Alloc frealloc;  /* function to reallocate memory */
    1.74 +  void *ud;         /* auxiliary data to `frealloc' */
    1.75 +  lu_byte currentwhite;
    1.76 +  lu_byte gcstate;  /* state of garbage collector */
    1.77 +  int sweepstrgc;  /* position of sweep in `strt' */
    1.78 +  GCObject *rootgc;  /* list of all collectable objects */
    1.79 +  GCObject **sweepgc;  /* position of sweep in `rootgc' */
    1.80 +  GCObject *gray;  /* list of gray objects */
    1.81 +  GCObject *grayagain;  /* list of objects to be traversed atomically */
    1.82 +  GCObject *weak;  /* list of weak tables (to be cleared) */
    1.83 +  GCObject *tmudata;  /* last element of list of userdata to be GC */
    1.84 +  Mbuffer buff;  /* temporary buffer for string concatentation */
    1.85 +  lu_mem GCthreshold;
    1.86 +  lu_mem totalbytes;  /* number of bytes currently allocated */
    1.87 +  lu_mem estimate;  /* an estimate of number of bytes actually in use */
    1.88 +  lu_mem gcdept;  /* how much GC is `behind schedule' */
    1.89 +  int gcpause;  /* size of pause between successive GCs */
    1.90 +  int gcstepmul;  /* GC `granularity' */
    1.91 +  lua_CFunction panic;  /* to be called in unprotected errors */
    1.92 +  TValue l_registry;
    1.93 +  struct lua_State *mainthread;
    1.94 +  UpVal uvhead;  /* head of double-linked list of all open upvalues */
    1.95 +  struct Table *mt[NUM_TAGS];  /* metatables for basic types */
    1.96 +  TString *tmname[TM_N];  /* array with tag-method names */
    1.97 +} global_State;
    1.98 +
    1.99 +
   1.100 +/*
   1.101 +** `per thread' state
   1.102 +*/
   1.103 +struct lua_State {
   1.104 +  CommonHeader;
   1.105 +  lu_byte status;
   1.106 +  StkId top;  /* first free slot in the stack */
   1.107 +  StkId base;  /* base of current function */
   1.108 +  global_State *l_G;
   1.109 +  CallInfo *ci;  /* call info for current function */
   1.110 +  const Instruction *savedpc;  /* `savedpc' of current function */
   1.111 +  StkId stack_last;  /* last free slot in the stack */
   1.112 +  StkId stack;  /* stack base */
   1.113 +  CallInfo *end_ci;  /* points after end of ci array*/
   1.114 +  CallInfo *base_ci;  /* array of CallInfo's */
   1.115 +  int stacksize;
   1.116 +  int size_ci;  /* size of array `base_ci' */
   1.117 +  unsigned short nCcalls;  /* number of nested C calls */
   1.118 +  unsigned short baseCcalls;  /* nested C calls when resuming coroutine */
   1.119 +  lu_byte hookmask;
   1.120 +  lu_byte allowhook;
   1.121 +  int basehookcount;
   1.122 +  int hookcount;
   1.123 +  lua_Hook hook;
   1.124 +  TValue l_gt;  /* table of globals */
   1.125 +  TValue env;  /* temporary place for environments */
   1.126 +  GCObject *openupval;  /* list of open upvalues in this stack */
   1.127 +  GCObject *gclist;
   1.128 +  struct lua_longjmp *errorJmp;  /* current error recover point */
   1.129 +  ptrdiff_t errfunc;  /* current error handling function (stack index) */
   1.130 +};
   1.131 +
   1.132 +
   1.133 +#define G(L)	(L->l_G)
   1.134 +
   1.135 +
   1.136 +/*
   1.137 +** Union of all collectable objects
   1.138 +*/
   1.139 +union GCObject {
   1.140 +  GCheader gch;
   1.141 +  union TString ts;
   1.142 +  union Udata u;
   1.143 +  union Closure cl;
   1.144 +  struct Table h;
   1.145 +  struct Proto p;
   1.146 +  struct UpVal uv;
   1.147 +  struct lua_State th;  /* thread */
   1.148 +};
   1.149 +
   1.150 +
   1.151 +/* macros to convert a GCObject into a specific value */
   1.152 +#define rawgco2ts(o)	check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
   1.153 +#define gco2ts(o)	(&rawgco2ts(o)->tsv)
   1.154 +#define rawgco2u(o)	check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
   1.155 +#define gco2u(o)	(&rawgco2u(o)->uv)
   1.156 +#define gco2cl(o)	check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
   1.157 +#define gco2h(o)	check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
   1.158 +#define gco2p(o)	check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
   1.159 +#define gco2uv(o)	check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
   1.160 +#define ngcotouv(o) \
   1.161 +	check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
   1.162 +#define gco2th(o)	check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
   1.163 +
   1.164 +/* macro to convert any Lua object into a GCObject */
   1.165 +#define obj2gco(v)	(cast(GCObject *, (v)))
   1.166 +
   1.167 +
   1.168 +LUAI_FUNC lua_State *luaE_newthread (lua_State *L);
   1.169 +LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
   1.170 +
   1.171 +#endif
   1.172 +