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/*
** $Id: lstate.c,v 1.5 1997/12/17 20:48:58 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
#include "lbuiltin.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"
lua_State *lua_state = NULL;
void lua_open (void)
{
if (lua_state) return;
lua_state = luaM_new(lua_State);
L->numCblocks = 0;
L->Cstack.base = 0;
L->Cstack.lua2C = 0;
L->Cstack.num = 0;
L->errorJmp = NULL;
L->rootproto.next = NULL;
L->rootproto.marked = 0;
L->rootcl.next = NULL;
L->rootcl.marked = 0;
L->rootglobal.next = NULL;
L->rootglobal.marked = 0;
L->roottable.next = NULL;
L->roottable.marked = 0;
L->refArray = NULL;
L->refSize = 0;
L->Mbuffsize = 0;
L->Mbuffnext = 0;
L->Mbuffbase = NULL;
L->Mbuffer = NULL;
L->GCthreshold = GARBAGE_BLOCK;
L->nblocks = 0;
luaD_init();
luaS_init();
luaX_init();
luaT_init();
luaB_predefine();
}
void lua_close (void)
{
TaggedString *alludata = luaS_collectudata();
L->GCthreshold = MAX_INT; /* to avoid GC during GC */
luaC_hashcallIM((Hash *)L->roottable.next); /* GC t.methods for tables */
luaC_strcallIM(alludata); /* GC tag methods for userdata */
luaD_gcIM(&luaO_nilobject); /* GC tag method for nil (signal end of GC) */
luaH_free((Hash *)L->roottable.next);
luaF_freeproto((TProtoFunc *)L->rootproto.next);
luaF_freeclosure((Closure *)L->rootcl.next);
luaS_free(alludata);
luaS_freeall();
luaM_free(L->stack.stack);
luaM_free(L->IMtable);
luaM_free(L->refArray);
luaM_free(L->Mbuffer);
luaM_free(L);
L = NULL;
#ifdef DEBUG
printf("total de blocos: %ld\n", numblocks);
printf("total de memoria: %ld\n", totalmem);
#endif
}
lua_State *lua_setstate (lua_State *st) {
lua_State *old = lua_state;
lua_state = st;
return old;
}
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