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class ObjectSpace::WeakMap

Parent:
Object
Included modules:
Enumerable

An ObjectSpace::WeakMap object holds references to any objects, but those objects can get garbage collected.

This class is mostly used internally by WeakRef, please use lib/weakref.rb for the public interface.

Public Instance Methods

[](p1) Show source 
static VALUE
wmap_aref(VALUE self, VALUE key)
{
    VALUE obj = wmap_lookup(self, key);
    return obj != Qundef ? obj : Qnil;
}

Retrieves a weakly referenced object with the given key

[]=(p1, p2) Show source 
static VALUE
wmap_aset(VALUE self, VALUE key, VALUE value)
{
    struct weakmap *w;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    if (FL_ABLE(value)) {
        define_final0(value, w->final);
    }
    if (FL_ABLE(key)) {
        define_final0(key, w->final);
    }

    st_update(w->obj2wmap, (st_data_t)value, wmap_aset_update, key);
    st_insert(w->wmap2obj, (st_data_t)key, (st_data_t)value);
    return nonspecial_obj_id(value);
}

Creates a weak reference from the given key to the given value

each() Show source 
static VALUE
wmap_each(VALUE self)
{
    struct weakmap *w;
    rb_objspace_t *objspace = &rb_objspace;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    st_foreach(w->wmap2obj, wmap_each_i, (st_data_t)objspace);
    return self;
}

Iterates over keys and objects in a weakly referenced object

Also aliased as: each_pair
each_key() Show source 
static VALUE
wmap_each_key(VALUE self)
{
    struct weakmap *w;
    rb_objspace_t *objspace = &rb_objspace;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    st_foreach(w->wmap2obj, wmap_each_key_i, (st_data_t)objspace);
    return self;
}

Iterates over keys and objects in a weakly referenced object

each_pair()

Iterates over keys and objects in a weakly referenced object

Alias for: each
each_value() Show source 
static VALUE
wmap_each_value(VALUE self)
{
    struct weakmap *w;
    rb_objspace_t *objspace = &rb_objspace;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    st_foreach(w->wmap2obj, wmap_each_value_i, (st_data_t)objspace);
    return self;
}

Iterates over keys and objects in a weakly referenced object

include?(p1) Show source 
static VALUE
wmap_has_key(VALUE self, VALUE key)
{
    return wmap_lookup(self, key) == Qundef ? Qfalse : Qtrue;
}

Returns true if key is registered

Also aliased as: member?, key?
inspect() Show source 
static VALUE
wmap_inspect(VALUE self)
{
    VALUE str;
    VALUE c = rb_class_name(CLASS_OF(self));
    struct weakmap *w;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    str = rb_sprintf("-<%"PRIsVALUE":%p", c, (void *)self);
    if (w->wmap2obj) {
        st_foreach(w->wmap2obj, wmap_inspect_i, str);
    }
    RSTRING_PTR(str)[0] = '#';
    rb_str_cat2(str, ">");
    return str;
}
key?(p1)

Returns true if key is registered

Alias for: include?
keys() Show source 
static VALUE
wmap_keys(VALUE self)
{
    struct weakmap *w;
    struct wmap_iter_arg args;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    args.objspace = &rb_objspace;
    args.value = rb_ary_new();
    st_foreach(w->wmap2obj, wmap_keys_i, (st_data_t)&args);
    return args.value;
}

Iterates over keys and objects in a weakly referenced object

length()

Returns the number of referenced objects

Alias for: size
member?(p1)

Returns true if key is registered

Alias for: include?
size() Show source 
static VALUE
wmap_size(VALUE self)
{
    struct weakmap *w;
    st_index_t n;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    n = w->wmap2obj->num_entries;
#if SIZEOF_ST_INDEX_T <= SIZEOF_LONG
    return ULONG2NUM(n);
#else
    return ULL2NUM(n);
#endif
}

Returns the number of referenced objects

Also aliased as: length
values() Show source 
static VALUE
wmap_values(VALUE self)
{
    struct weakmap *w;
    struct wmap_iter_arg args;

    TypedData_Get_Struct(self, struct weakmap, &weakmap_type, w);
    args.objspace = &rb_objspace;
    args.value = rb_ary_new();
    st_foreach(w->wmap2obj, wmap_values_i, (st_data_t)&args);
    return args.value;
}

Iterates over values and objects in a weakly referenced object

Ruby Core © 1993–2020 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.