July 15th Wednesday (七月　十五日　水曜日)

最新推荐文章于 2025-08-21 09:06:15 发布

原创最新推荐文章于 2025-08-21 09:06:15 发布 · 542 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#reference #vector #table

本文介绍了弱引用箱(WeakBoxes)的概念及其工作原理。弱引用箱类似于普通的存储单元，但其内容可通过弱引用访问。当垃圾回收器确定弱引用箱的内容仅能通过弱引用访问时，该内容将被替换为#f。文章还提到了弱引用的几种形式。

Weak Boxes

A weak box is similar to a normal box (A box is like a single-element vector, normally used as minimal mutable storage.), but when
the garbage collector can prove that the content value of a weak box is only reachable via weak references, the content of the weak box
is replaced with #f. A weak reference is a reference through a weak box, through a key reference in a weak hash table, through a value
in an ephemeron where the value can be replaced by #f, or through a custodian.