How does sbrk() work in C++?

Question

Where can I read about sbrk() in some detail?

How does it exactly work?

In what situations would I want to use sbrk() instead of th

Answer 1

This depends on what you mean by malloc being "Cumbersome". sbrk is typically not used directly anymore, unless you're implementing your own memory allocator: IE, operator overriding "new". Even then I'd possibly use malloc to give me my initial memory.

If you'd like to see how to to implement malloc() on top of sbrk(), check out http://web.ics.purdue.edu/~cs354/labs/lab6/ which is an exercise going through that.

On a modern system you shouldn't touch this interface, though. Since you're calling malloc and new cumbersome, I suspect you don't have all the requisite experience to safely and properly use sbrk for your code.