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Commit message (Collapse)AuthorAge
* Run updatepo.shPilzAdam2013-11-23
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* Translated using Weblate (Romanian)King Artur2013-11-23
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* Run updatepo.shIlya Zhuravlev2013-09-08
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* Run util/updatepo.shPilzAdam2013-08-25
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* Fix *.po errors caused by rebase.Ilya Zhuravlev2013-08-25
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* Fix i18n of some strings.arsdragonfly2013-07-02
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* Update po filesPilzAdam2013-05-13
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* Update po filesPilzAdam2013-03-30
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* Translate key functions in key change menuPilzAdam2013-01-30
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* Add Spanish, Russian, Polish and Romanian languages.Ilya Zhuravlev2013-01-29
='#n142'>142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214
/*
** $Id: lstate.c,v 2.36.1.2 2008/01/03 15:20:39 roberto Exp $
** Global State
** See Copyright Notice in lua.h
*/


#include <stddef.h>

#define lstate_c
#define LUA_CORE

#include "lua.h"

#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "llex.h"
#include "lmem.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"


#define state_size(x)	(sizeof(x) + LUAI_EXTRASPACE)
#define fromstate(l)	(cast(lu_byte *, (l)) - LUAI_EXTRASPACE)
#define tostate(l)   (cast(lua_State *, cast(lu_byte *, l) + LUAI_EXTRASPACE))


/*
** Main thread combines a thread state and the global state
*/
typedef struct LG {
  lua_State l;
  global_State g;
} LG;
  


static void stack_init (lua_State *L1, lua_State *L) {
  /* initialize CallInfo array */
  L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
  L1->ci = L1->base_ci;
  L1->size_ci = BASIC_CI_SIZE;
  L1->end_ci = L1->base_ci + L1->size_ci - 1;
  /* initialize stack array */
  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
  L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
  L1->top = L1->stack;
  L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
  /* initialize first ci */
  L1->ci->func = L1->top;
  setnilvalue(L1->top++);  /* `function' entry for this `ci' */
  L1->base = L1->ci->base = L1->top;
  L1->ci->top = L1->top + LUA_MINSTACK;
}


static void freestack (lua_State *L, lua_State *L1) {
  luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
  luaM_freearray(L, L1->stack, L1->stacksize, TValue);
}


/*
** open parts that may cause memory-allocation errors
*/
static void f_luaopen (lua_State *L, void *ud) {
  global_State *g = G(L);
  UNUSED(ud);
  stack_init(L, L);  /* init stack */
  sethvalue(L, gt(L), luaH_new(L, 0, 2));  /* table of globals */
  sethvalue(L, registry(L), luaH_new(L, 0, 2));  /* registry */
  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */
  luaT_init(L);
  luaX_init(L);
  luaS_fix(luaS_newliteral(L, MEMERRMSG));
  g->GCthreshold = 4*g->totalbytes;
}


static void preinit_state (lua_State *L, global_State *g) {
  G(L) = g;
  L->stack = NULL;
  L->stacksize = 0;
  L->errorJmp = NULL;
  L->hook = NULL;
  L->hookmask = 0;
  L->basehookcount = 0;
  L->allowhook = 1;
  resethookcount(L);
  L->openupval = NULL;
  L->size_ci = 0;
  L->nCcalls = L->baseCcalls = 0;
  L->status = 0;
  L->base_ci = L->ci = NULL;
  L->savedpc = NULL;
  L->errfunc = 0;
  setnilvalue(gt(L));
}


static void close_state (lua_State *L) {
  global_State *g = G(L);
  luaF_close(L, L->stack);  /* close all upvalues for this thread */
  luaC_freeall(L);  /* collect all objects */
  lua_assert(g->rootgc == obj2gco(L));
  lua_assert(g->strt.nuse == 0);
  luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
  luaZ_freebuffer(L, &g->buff);
  freestack(L, L);
  lua_assert(g->totalbytes == sizeof(LG));
  (*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0);
}


lua_State *luaE_newthread (lua_State *L) {
  lua_State *L1 = tostate(luaM_malloc(L, state_size(lua_State)));
  luaC_link(L, obj2gco(L1), LUA_TTHREAD);
  preinit_state(L1, G(L));
  stack_init(L1, L);  /* init stack */
  setobj2n(L, gt(L1), gt(L));  /* share table of globals */
  L1->hookmask = L->hookmask;
  L1->basehookcount = L->basehookcount;
  L1->hook = L->hook;
  resethookcount(L1);
  lua_assert(iswhite(obj2gco(L1)));
  return L1;
}


void luaE_freethread (lua_State *L, lua_State *L1) {
  luaF_close(L1, L1->stack);  /* close all upvalues for this thread */
  lua_assert(L1->openupval == NULL);
  luai_userstatefree(L1);
  freestack(L, L1);
  luaM_freemem(L, fromstate(L1), state_size(lua_State));
}


LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
  int i;
  lua_State *L;
  global_State *g;
  void *l = (*f)(ud, NULL, 0, state_size(LG));
  if (l == NULL) return NULL;
  L = tostate(l);
  g = &((LG *)L)->g;
  L->next = NULL;
  L->tt = LUA_TTHREAD;
  g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
  L->marked = luaC_white(g);
  set2bits(L->marked, FIXEDBIT, SFIXEDBIT);
  preinit_state(L, g);
  g->frealloc = f;
  g->ud = ud;
  g->mainthread = L;
  g->uvhead.u.l.prev = &g->uvhead;
  g->uvhead.u.l.next = &g->uvhead;
  g->GCthreshold = 0;  /* mark it as unfinished state */
  g->strt.size = 0;
  g->strt.nuse = 0;
  g->strt.hash = NULL;
  setnilvalue(registry(L));
  luaZ_initbuffer(L, &g->buff);
  g->panic = NULL;
  g->gcstate = GCSpause;
  g->rootgc = obj2gco(L);
  g->sweepstrgc = 0;
  g->sweepgc = &g->rootgc;
  g->gray = NULL;
  g->grayagain = NULL;
  g->weak = NULL;
  g->tmudata = NULL;
  g->totalbytes = sizeof(LG);
  g->gcpause = LUAI_GCPAUSE;
  g->gcstepmul = LUAI_GCMUL;
  g->gcdept = 0;
  for (i=0; i<NUM_TAGS; i++) g->mt[i] = NULL;
  if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
    /* memory allocation error: free partial state */
    close_state(L);
    L = NULL;
  }
  else
    luai_userstateopen(L);
  return L;
}


static void callallgcTM (lua_State *L, void *ud) {
  UNUSED(ud);
  luaC_callGCTM(L);  /* call GC metamethods for all udata */
}


LUA_API void lua_close (lua_State *L) {
  L = G(L)->mainthread;  /* only the main thread can be closed */
  lua_lock(L);
  luaF_close(L, L->stack);  /* close all upvalues for this thread */
  luaC_separateudata(L, 1);  /* separate udata that have GC metamethods */
  L->errfunc = 0;  /* no error function during GC metamethods */
  do {  /* repeat until no more errors */
    L->ci = L->base_ci;
    L->base = L->top = L->ci->base;
    L->nCcalls = L->baseCcalls = 0;
  } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
  lua_assert(G(L)->tmudata == NULL);
  luai_userstateclose(L);
  close_state(L);
}