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CppCon 2016: Bob Steagall “Lightweight Object Persistence With Relocatable Heaps in Modern C++"

3,819 views · Published 1 October 2016 · 1:01:32 · Indexed 21 September 2026

Channel: CppCon · 2016 · Education

http://CppCon.org
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Presentation Slides, PDFs, Source Code and other presenter materials are available at: https://github.com/cppcon/cppcon2016
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Modern C++ brings many exciting and powerful advances to both the core language and the standard C++ library. Among these are changes to the standard allocator requirements that now permit allocators to allocate and deallocate blocks of memory that are addressable by generalized (i.e., non-native) pointers, as well as requirements for allocator-aware containers to employ such pointers.

This talk will describe a slightly different way of thinking about memory allocation, decomposing the idea into four distinct structural concepts – addressing model, storage model, pointer interface, and allocation strategy. To illustrate this new mental framework, we'll examine the design of a standard-conformant allocator that uses shared memory as its storage model, and show how it can be used to construct data structures based on standard C++ containers directly in shared memory. We'll then explore how this particular allocator's address-independent storage model supports a form of lightweight object persistence (with some constraints). Along the way we'll compare and contrast the old C++03 allocator requirements with those of C++14, and we'll also see at least one way to implement a generalized pointer. Finally, if time permits, we'll touch on other storage models and possible applications.
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Bob Steagall
I've been working in C++ for the last 24 years. The majority of my career has been spent in medical imaging, where I led teams building applications for functional MRI and CT-based cardiac visualization. After a brief journey through the world of DNS, I'm now trying my hand at analytics.
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Videos Filmed & Edited by Bash Films: http://www.BashFilms.com

Work at Hudson River Trading (HRT): https://tinyurl.com/safxfctf

CppCon 2016: Bob Steagall “Lightweight Object Persistence With Relocatable Heaps in Modern C++"

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