A blog about low level and game engine programming.https://andreleite.com/https://andreleite.com/posts/2025/cpp/implementing-defer-in-cpp/https://andreleite.com/posts/2025/cpp/implementing-defer-in-cpp/Implementing a Go-style defer mechanism in C++Fri, 28 Nov 2025 20:00:00 GMThttps://andreleite.com/posts/2025/game-loop/fixed-timestep-game-loop/https://andreleite.com/posts/2025/game-loop/fixed-timestep-game-loop/A deep dive into fixed timesteps and floating point determinism.Mon, 24 Nov 2025 22:00:00 GMThttps://andreleite.com/posts/2025/deque/work-stealing-deque-part-4-lock-free-thief/https://andreleite.com/posts/2025/deque/work-stealing-deque-part-4-lock-free-thief/Completing the lock-free deque with the `steal` operation. We look at how thieves safely race against the owner and how to integrate this into a robust scheduler.Mon, 29 Sep 2025 19:00:00 GMThttps://andreleite.com/posts/2025/deque/work-stealing-deque-part-3-lock-free-owner/https://andreleite.com/posts/2025/deque/work-stealing-deque-part-3-lock-free-owner/Implementing the lock-free `push` and `pop` for the deque owner, handling cache alignment, and managing the race condition when the queue becomes empty.Mon, 29 Sep 2025 17:00:00 GMThttps://andreleite.com/posts/2025/deque/work-stealing-deque-part-2-memory-ordering/https://andreleite.com/posts/2025/deque/work-stealing-deque-part-2-memory-ordering/Moving beyond locks requires understanding how CPUs reorder instructions. We explore atomics, acquire/release semantics, and the illusion of sequential execution.Sun, 28 Sep 2025 22:00:00 GMThttps://andreleite.com/posts/2025/deque/work-stealing-deque-part-1-locks-and-contention/https://andreleite.com/posts/2025/deque/work-stealing-deque-part-1-locks-and-contention/Why a central task queue becomes a bottleneck, how false sharing kills performance, and building a baseline implementation with locks.Sun, 28 Sep 2025 11:30:00 GMThttps://andreleite.com/posts/2025/nstl/virtual-memory-ring-buffer/https://andreleite.com/posts/2025/nstl/virtual-memory-ring-buffer/Using virtual memory to create a seamless ring buffer with no wrap-around logic.Sat, 09 Aug 2025 15:00:00 GMThttps://andreleite.com/posts/2025/nstl/virtual-memory-pool-allocator/https://andreleite.com/posts/2025/nstl/virtual-memory-pool-allocator/Building specialized allocators: free lists, packed arrays, and slot maps with generational handles.Sat, 12 Jul 2025 09:00:00 GMThttps://andreleite.com/posts/2025/nstl/virtual-memory-arena-allocator/https://andreleite.com/posts/2025/nstl/virtual-memory-arena-allocator/Building an Arena: a private memory block where allocation is instant and entire classes of bugs disappear.Fri, 04 Jul 2025 19:00:00 GMThttps://andreleite.com/posts/2025/nstl/virtual-memory-explained/https://andreleite.com/posts/2025/nstl/virtual-memory-explained/How your computer runs multiple programs without them corrupting each other.Sat, 21 Jun 2025 17:00:00 GMT