Understanding the C/C++ memory model

Software is Crap

I know that a lot of people struggle with understanding the memory model introduced in C11/C++11. In a recent conversation I was alerted to the existence of this blog post, which while correct (by my understanding) is in my opinion aimed at those who already have a good understanding of some of the underlying concepts. I’m going to try to set out my understanding of the model, which is hopefully correct, in more straightforward terms and with a more “ground up” explanation.

Introduction: Program order versus memory order

You have your C/C++ program and it stores values (sets a variable or stores a value through a pointer) and it loads values (reads a variable or reads a value through a pointer). The order that your program specifies these loads and stores is the “program order”. However, there are a number of things that can cause the order in which…

View original post 1,418 more words

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s