15 lines
892 B
Markdown
15 lines
892 B
Markdown
% The Perils Of RAII
|
|
|
|
Ownership Based Resource Management (AKA RAII: Resource Acquisition Is Initialization) is
|
|
something you'll interact with a lot in Rust. Especially if you use the standard library.
|
|
|
|
Roughly speaking the pattern is as follows: to acquire a resource, you create an object that
|
|
manages it. To release the resource, you simply destroy the object, and it cleans up the
|
|
resource for you. The most common "resource"
|
|
this pattern manages is simply *memory*. `Box`, `Rc`, and basically everything in
|
|
`std::collections` is a convenience to enable correctly managing memory. This is particularly
|
|
important in Rust because we have no pervasive GC to rely on for memory management. Which is the
|
|
point, really: Rust is about control. However we are not limited to just memory.
|
|
Pretty much every other system resource like a thread, file, or socket is exposed through
|
|
this kind of API.
|