lfunc.h File Reference

#include "lobject.h"

Go to the source code of this file.

Macros
#define	sizeCclosure(n)
#define	sizeLclosure(n)

Functions
LUAI_FUNC Proto *	luaF_newproto (lua_State *L)
LUAI_FUNC Closure *	luaF_newCclosure (lua_State *L, int nelems, Table *e)
LUAI_FUNC Closure *	luaF_newLclosure (lua_State *L, int nelems, Table *e)
LUAI_FUNC UpVal *	luaF_newupval (lua_State *L)
LUAI_FUNC UpVal *	luaF_findupval (lua_State *L, StkId level)
LUAI_FUNC void	luaF_close (lua_State *L, StkId level)
LUAI_FUNC void	luaF_freeproto (lua_State *L, Proto *f)
LUAI_FUNC void	luaF_freeclosure (lua_State *L, Closure *c)
LUAI_FUNC void	luaF_freeupval (lua_State *L, UpVal *uv)
LUAI_FUNC const char *	luaF_getlocalname (const Proto *func, int local_number, int pc)

Macro Definition Documentation

sizeCclosure

#define sizeCclosure

(

n

)

Value:

                         (cast(int, sizeof(CClosure)) + \
                         cast(int, sizeof(TValue)*((n)-1)))

Definition at line 14 of file lua-5.1.5/src/lfunc.h.

#define sizeCclosure(n) (cast(int, sizeof(CClosure)) + \
                         cast(int, sizeof(TValue)*((n)-1)))

Referenced by freeobj(), freeobj(), freeobj(), luaF_freeclosure(), luaF_newCclosure(), luaF_newCclosure(), luaF_newCclosure(), propagatemark(), traverseCclosure(), and traverseCclosure().

sizeLclosure

#define sizeLclosure

(

n

)

Value:

                         (cast(int, sizeof(LClosure)) + \
                         cast(int, sizeof(TValue *)*((n)-1)))

Definition at line 17 of file lua-5.1.5/src/lfunc.h.

#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
                         cast(int, sizeof(TValue *)*((n)-1)))

Referenced by freeLclosure(), freeobj(), freeobj(), luaF_freeclosure(), luaF_newLclosure(), luaF_newLclosure(), luaF_newLclosure(), propagatemark(), traverseLclosure(), and traverseLclosure().

Function Documentation

luaF_close()

LUAI_FUNC void luaF_close	(	lua_State *	L,
		StkId	level )

Definition at line 96 of file lua-5.1.5/src/lfunc.c.

                                            {
  UpVal *uv;
  global_State *g = G(L);
  while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) {
    GCObject *o = obj2gco(uv);
    lua_assert(!isblack(o) && uv->v != &uv->u.value);
    L->openupval = uv->next;  /* remove from `open' list */
    if (isdead(g, o))
      luaF_freeupval(L, uv);  /* free upvalue */
    else {
      unlinkupval(uv);
      setobj(L, &uv->u.value, uv->v);
      uv->v = &uv->u.value;  /* now current value lives here */
      luaC_linkupval(L, uv);  /* link upvalue into `gcroot' list */
    }
  }
}

luaF_findupval()

LUAI_FUNC UpVal * luaF_findupval	(	lua_State *	L,
		StkId	level )

Definition at line 53 of file lua-5.1.5/src/lfunc.c.

                                                  {
  global_State *g = G(L);
  GCObject **pp = &L->openupval;
  UpVal *p;
  UpVal *uv;
  while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) {
    lua_assert(p->v != &p->u.value);
    if (p->v == level) {  /* found a corresponding upvalue? */
      if (isdead(g, obj2gco(p)))  /* is it dead? */
        changewhite(obj2gco(p));  /* ressurect it */
      return p;
    }
    pp = &p->next;
  }
  uv = luaM_new(L, UpVal);  /* not found: create a new one */
  uv->tt = LUA_TUPVAL;
  uv->marked = luaC_white(g);
  uv->v = level;  /* current value lives in the stack */
  uv->next = *pp;  /* chain it in the proper position */
  *pp = obj2gco(uv);
  uv->u.l.prev = &g->uvhead;  /* double link it in `uvhead' list */
  uv->u.l.next = g->uvhead.u.l.next;
  uv->u.l.next->u.l.prev = uv;
  g->uvhead.u.l.next = uv;
  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
  return uv;
}

luaF_freeclosure()

LUAI_FUNC void luaF_freeclosure	(	lua_State *	L,
		Closure *	c )

Definition at line 152 of file lua-5.1.5/src/lfunc.c.

                                                 {
  int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
                          sizeLclosure(c->l.nupvalues);
  luaM_freemem(L, c, size);
}

References Closure::c, Closure::l, luaM_freemem, sizeCclosure, and sizeLclosure.

Referenced by freeobj().

luaF_freeproto()

LUAI_FUNC void luaF_freeproto	(	lua_State *	L,
		Proto *	f )

Definition at line 141 of file lua-5.1.5/src/lfunc.c.

                                             {
  luaM_freearray(L, f->code, f->sizecode, Instruction);
  luaM_freearray(L, f->p, f->sizep, Proto *);
  luaM_freearray(L, f->k, f->sizek, TValue);
  luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
  luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
  luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
  luaM_free(L, f);
}

luaF_freeupval()

LUAI_FUNC void luaF_freeupval	(	lua_State *	L,
		UpVal *	uv )

Definition at line 89 of file lua-5.1.5/src/lfunc.c.

                                              {
  if (uv->v != &uv->u.value)  /* is it open? */
    unlinkupval(uv);  /* remove from open list */
  luaM_free(L, uv);  /* free upvalue */
}

luaF_getlocalname()

LUAI_FUNC const char * luaF_getlocalname	(	const Proto *	func,
		int	local_number,
		int	pc )

Definition at line 163 of file lua-5.1.5/src/lfunc.c.

                                                                         {
  int i;
  for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
    if (pc < f->locvars[i].endpc) {  /* is variable active? */
      local_number--;
      if (local_number == 0)
        return getstr(f->locvars[i].varname);
    }
  }
  return NULL;  /* not found */
}

luaF_newCclosure()

LUAI_FUNC Closure * luaF_newCclosure	(	lua_State *	L,
		int	nelems,
		Table *	e )

Definition at line 23 of file lua-5.1.5/src/lfunc.c.

                                                               {
  Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
  luaC_link(L, obj2gco(c), LUA_TFUNCTION);
  c->c.isC = 1;
  c->c.env = e;
  c->c.nupvalues = cast_byte(nelems);
  return c;
}

References Closure::c, cast, cast_byte, LUA_TFUNCTION, luaC_link(), luaM_malloc, obj2gco, and sizeCclosure.

Referenced by f_Ccall(), and lua_pushcclosure().

luaF_newLclosure()

LUAI_FUNC Closure * luaF_newLclosure	(	lua_State *	L,
		int	nelems,
		Table *	e )

Definition at line 33 of file lua-5.1.5/src/lfunc.c.

                                                               {
  Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
  luaC_link(L, obj2gco(c), LUA_TFUNCTION);
  c->l.isC = 0;
  c->l.env = e;
  c->l.nupvalues = cast_byte(nelems);
  while (nelems--) c->l.upvals[nelems] = NULL;
  return c;
}

References cast, cast_byte, Closure::l, LUA_TFUNCTION, luaC_link(), luaM_malloc, NULL, obj2gco, sizeLclosure, and LClosure::upvals.

Referenced by f_parser(), luaU_undump(), luaU_undump(), luaV_execute(), luaY_parser(), pushclosure(), pushclosure(), and pushclosure().

luaF_newproto()

LUAI_FUNC Proto * luaF_newproto

(

lua_State *

L

)

Definition at line 115 of file lua-5.1.5/src/lfunc.c.

                                    {
  Proto *f = luaM_new(L, Proto);
  luaC_link(L, obj2gco(f), LUA_TPROTO);
  f->k = NULL;
  f->sizek = 0;
  f->p = NULL;
  f->sizep = 0;
  f->code = NULL;
  f->sizecode = 0;
  f->sizelineinfo = 0;
  f->sizeupvalues = 0;
  f->nups = 0;
  f->upvalues = NULL;
  f->numparams = 0;
  f->is_vararg = 0;
  f->maxstacksize = 0;
  f->lineinfo = NULL;
  f->sizelocvars = 0;
  f->locvars = NULL;
  f->linedefined = 0;
  f->lastlinedefined = 0;
  f->source = NULL;
  return f;
}

luaF_newupval()

LUAI_FUNC UpVal * luaF_newupval

(

lua_State *

L

)

Definition at line 44 of file lua-5.1.5/src/lfunc.c.

                                    {
  UpVal *uv = luaM_new(L, UpVal);
  luaC_link(L, obj2gco(uv), LUA_TUPVAL);
  uv->v = &uv->u.value;
  setnilvalue(uv->v);
  return uv;
}