/*
** load precompiled chunk
*/
Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
{
LoadState S;
Closure* cl;
if (*name=='@' || *name=='=')
S.name=name+1;
else if (*name==LUA_SIGNATURE[0])
S.name="binary string";
else
S.name=name;
S.L=L;
S.Z=Z;
S.b=buff;
LoadHeader(&S);
cl=luaF_newLclosure(L,1);
setclLvalue(L,L->top,cl); incr_top(L);
cl->l.p=luaF_newproto(L);
LoadFunction(&S,cl->l.p);
if (cl->l.p->sizeupvalues != 1)
{
Proto* p=cl->l.p;
cl=luaF_newLclosure(L,cl->l.p->sizeupvalues);
cl->l.p=p;
setclLvalue(L,L->top-1,cl);
}
luai_verifycode(L,buff,cl->l.p);
return cl;
}
static void lll_closure(lua_State* L, LClosure* cl, TValue* base, TValue* ra,
int bx) {
Proto *p = cl->p->p[bx];
LClosure *ncl = getcached(p, cl->upvals, base); /* cached closure */
if (ncl == NULL) /* no match? */
pushclosure(L, p, cl->upvals, base, ra); /* create a new one */
else
setclLvalue(L, ra, ncl); /* push cashed closure */
}
/*
** create a new Lua closure, push it in the stack, and initialize
** its upvalues. Note that the call to 'luaC_barrierproto' must come
** before the assignment to 'p->cache', as the function needs the
** original value of that field.
*/
static void pushclosure (lua_State *L, Proto *p, UpVal **encup, StkId base,
StkId ra) {
int nup = p->sizeupvalues;
Upvaldesc *uv = p->upvalues;
int i;
Closure *ncl = luaF_newLclosure(L, p);
setclLvalue(L, ra, ncl); /* anchor new closure in stack */
for (i = 0; i < nup; i++) { /* fill in its upvalues */
if (uv[i].instack) /* upvalue refers to local variable? */
ncl->l.upvals[i] = luaF_findupval(L, base + uv[i].idx);
else /* get upvalue from enclosing function */
ncl->l.upvals[i] = encup[uv[i].idx];
}
luaC_barrierproto(L, p, ncl);
p->cache = ncl; /* save it on cache for reuse */
}
static void pushclosure (lua_State *L, Proto *p, UpVal **encup, StkId base,
StkId ra) {
int nup = p->sizeupvalues;
Upvaldesc *uv = p->upvalues;
int i;
LClosure *ncl = luaF_newLclosure(L, nup);
ncl->p = p;
setclLvalue(L, ra, ncl); /* anchor new closure in stack */
for (i = 0; i < nup; i++) { /* fill in its upvalues */
if (uv[i].instack) /* upvalue refers to local variable? */
ncl->upvals[i] = luaF_findupval(L, base + uv[i].idx);
else /* get upvalue from enclosing function */
ncl->upvals[i] = encup[uv[i].idx];
ncl->upvals[i]->refcount++;
/* new closure is white, so we do not need a barrier here */
}
if (!isblack(p)) /* cache will not break GC invariant? */
p->cache = ncl; /* save it on cache for reuse */
}
/*
** load precompiled chunk
*/
LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
LoadState S;
LClosure *cl;
if (*name == '@' || *name == '=')
S.name = name + 1;
else if (*name == LUA_SIGNATURE[0])
S.name = "binary string";
else
S.name = name;
S.L = L;
S.Z = Z;
checkHeader(&S);
cl = luaF_newLclosure(L, LoadByte(&S));
setclLvalue(L, L->top, cl);
luaD_inctop(L);
cl->p = luaF_newproto(L);
LoadFunction(&S, cl->p, NULL);
lua_assert(cl->nupvalues == cl->p->sizeupvalues);
luai_verifycode(L, buff, cl->p);
return cl;
}
LUA_API void lua_pushlclosure (lua_State *L, LClosure *c) {
lua_lock(L);
setclLvalue(L, L->top, c);
api_incr_top(L);
lua_unlock(L);
}
