Class: Concurrent::Set — Concurrent Ruby

# Class: Concurrent::Set

Inherits:
  SetImplementation
  - Object
  - Concurrent::Set
  show all

Defined in:
  lib/concurrent/set.rb

## Overview

Note:

`a += b` is not a thread-safe operation on

A thread-safe subclass of Set. This version locks against the object itself for every method call, ensuring only one thread can be reading or writing at a time. This includes iteration methods like `#each`.

`Concurrent::Set`. It reads Set `a`, then it creates new `Concurrent::Set` which is union of `a` and `b`, then it writes the union to `a`. The read and write are independent operations they do not form a single atomic operation therefore when two `+=` operations are executed concurrently updates may be lost. Use `#merge` instead.

See Also:

- Ruby standard library `Set`