From the course: Design Patterns for Rust
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Guard - Rust Tutorial
From the course: Design Patterns for Rust
Guard
- [Instructor] The guard pattern ensures that resources are required and released in a safe and predictable manner. In Rust, this concept is often implemented through its ownership system. For example, when you lock a mutex, you get a mutex guard that unlocks the mutex when the guard goes out of scope. Guards provide access to some shared resource. Guards typically have a special role at the end of the resource's lifecycle. They need to ensure that cleanup steps have been completed, and Rust's standard library mutex guard serves as an implementation of the guard pattern. When you call the lock method on a mutex, you don't get direct access to the data behind the lock. Instead, the call to lock returns a mutex guard that facilitates access to the underlying data. The mutex guard ensures two things. First, that only one thread can access the guarded data at any given time, and secondly, that the lock is automatically released…
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