Glossary coding Term Page

Rc<T>

A single-threaded shared-ownership reference-counted pointer

rc #rust#ownership#memory

Korean version

Aliases

Reference CountedRc

Prerequisites

Smart Pointer

Related Concepts

Smart Pointer Heap Memory Arc<T>Ownership Send/Sync

Core Idea

[[rc|Rc<T>]] is the single-threaded reference-counted pointer for shared read-only ownership of one heap value. Rc::clone does not copy the data itself; it only increments the reference count so several owners can hold the same value.

Why It Matters Here

Mathbong uses Rc for GUI-like trees, graph structures, shared configuration, and contrasts with Arc<T>. The defining constraint is simple: shared ownership is allowed, but only inside one thread.

Posts Mentioning This Concept

[Rust Series 18] Concurrency Basics Take the first step toward safe parallel work by covering threads, channels, and an intuition for Send/Sync.[Rust Series 16] Smart Pointers and Heap Data Walk through the first pattern for sharing and mutating heap data with Box, Rc, and RefCell.[Rust 시리즈 18편] 동시성 기초 스레드, 채널, Send/Sync 감각을 다루며 안전하게 작업을 병렬로 나누는 첫 걸음을 떼어 봅니다.