Software Engineering

When should one utilize Atomic Operations?

I have never used atomic operations, and remain largely ignorant of how to utilize them. And yet, I often come across objects like this when peering into Qt's backend: https://doc.qt.io/qt-6/qatomicinteger.html This leads me to question if there is a feature here that I have not been properly taking advantage of. My question therefore is regarding, When should one utilize atomic operations? Is it supposed to improve performance? Are there other considerations besides performance? When would one look at someones code, and chastize them for having not used atomic operations? Looking back, I am wondering if there are places that I should have been using them, but just went with a mutex instead.

Jun 22, 2025 - 23:10
 0

I have never used atomic operations, and remain largely ignorant of how to utilize them. And yet, I often come across objects like this when peering into Qt's backend: https://doc.qt.io/qt-6/qatomicinteger.html

This leads me to question if there is a feature here that I have not been properly taking advantage of.

My question therefore is regarding,

  • When should one utilize atomic operations?
  • Is it supposed to improve performance?
  • Are there other considerations besides performance?
  • When would one look at someones code, and chastize them for having not used atomic operations?

Looking back, I am wondering if there are places that I should have been using them, but just went with a mutex instead.

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