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/*
** $Id: lstate.cpp 905 2008-07-20 21:08:22Z aquadran $
** Global State
** See Copyright Notice in lua.h
*/
#include "lbuiltin.h"
#include "ldo.h"
#include "lauxlib.h"
#include "lfunc.h"
#include "lgc.h"
#include "llex.h"
#include "lmem.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltask.h"
#include "ltm.h"
lua_State *lua_state = NULL;
int32 globalTaskSerialId;
void stderrorim (void);
static luaL_reg stdErrorRimFunc[] = {
{"stderrorim", stderrorim}
};
static void lua_openthr (void)
{
L->numCblocks = 0;
L->Cstack.base = 0;
L->Cstack.lua2C = 0;
L->Cstack.num = 0;
L->errorJmp = NULL;
L->Mbuffsize = 0;
L->Mbuffnext = 0;
L->Mbuffbase = NULL;
L->Mbuffer = NULL;
L->Tstate = RUN;
}
void lua_resetglobals(void) {
globalTaskSerialId = 1;
lua_openthr();
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->GCthreshold = GARBAGE_BLOCK;
L->nblocks = 0;
L->root_task = luaM_new(struct lua_Task);
L->root_task->next = NULL;
L->last_task = L->root_task;
L->curr_task = L->root_task;
luaD_init();
luaD_initthr();
luaS_init();
luaX_init();
}
void lua_open (void)
{
if (lua_state) return;
lua_state = luaM_new(lua_State);
lua_resetglobals();
luaT_init();
luaB_predefine();
luaL_addlibtolist(stdErrorRimFunc, (sizeof(stdErrorRimFunc) / sizeof(stdErrorRimFunc[0])));
}
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;
}
static void savetask (struct lua_Task *t) {
t->stack = L->stack;
t->Cstack = L->Cstack;
t->errorJmp = L->errorJmp;
t->ci = L->ci;
t->base_ci = L->base_ci;
t->base_ci_size = L->base_ci_size;
t->end_ci = L->end_ci;
t->Mbuffer = L->Mbuffer;
t->Mbuffbase = L->Mbuffbase;
t->Mbuffsize = L->Mbuffsize;
t->Mbuffnext = L->Mbuffnext;
memcpy(t->Cblocks, L->Cblocks, sizeof(L->Cblocks));
t->numCblocks = L->numCblocks;
t->Tstate = L->Tstate;
}
static void loadtask (struct lua_Task *t) {
L->stack = t->stack;
L->Cstack = t->Cstack;
L->errorJmp = t->errorJmp;
L->ci = t->ci;
L->base_ci = t->base_ci;
L->base_ci_size = t->base_ci_size;
L->end_ci = t->end_ci;
L->Mbuffer = t->Mbuffer;
L->Mbuffbase = t->Mbuffbase;
L->Mbuffsize = t->Mbuffsize;
L->Mbuffnext = t->Mbuffnext;
memcpy(L->Cblocks, t->Cblocks, sizeof(L->Cblocks));
L->numCblocks = t->numCblocks;
L->Tstate = t->Tstate;
}
void luaI_switchtask(struct lua_Task *t) {
savetask(L->curr_task);
L->curr_task = t;
loadtask(t);
}
struct lua_Task *luaI_newtask (void) {
struct lua_Task *result;
savetask(L->curr_task);
result = luaM_new(struct lua_Task);
L->curr_task = result;
result->next = NULL;
lua_openthr();
luaD_initthr();
result->id = globalTaskSerialId++;
return result;
}
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