Open Source

GSoC 2026 Final Report: Modular Heap Allocators and TLSF Integration in RTEMS Project Summary My Google Summer of Code 2026 project focused on making the RTEMS heap architecture modular and adding the Two-Level Segregated Fit (TLSF) allocator as an alternative heap implementation. RTEMS (Real-Time Executive for Multiprocessor Systems) is a real-time operating system used in embedded and mission-critical systems. RTEMS currently uses its first-fit Heap Allocator for dynamic memory allocation. The goal of this project is to let RTEMS use different heap implementations through a common allocator interface without requiring application-level code to depend on a specific backend. TLSF was selected as the first alternative backend because it organizes free blocks using two-level size classes and bitmaps, allowing suitable blocks to be located without scanning a linear free list. ...

GSoC 2025 Final Report: Implementing POSIX Issue 8 Functions in RTEMS Project Summary My Google Summer of Code 2025 project focused on enhancing RTEMS’ POSIX compliance by implementing critical functions introduced in POSIX Issue 8. RTEMS (Real-Time Executive for Multiprocessor Systems) is a real-time operating system designed for embedded and mission-critical applications, including space exploration and aerospace systems. The goal of this project was to analyze, implement, and thoroughly test missing POSIX Issue 8 APIs to bring RTEMS closer to full POSIX compliance, enabling better portability and functionality for real-time applications. ...

GSoC 2025 Midterm Evaluation: Implementing POSIX Issue 8 Functions in RTEMS As I reach the midpoint of my Google Summer of Code 2025 journey with RTEMS, I’m excited to share the progress I’ve made on implementing POSIX Issue 8 functions. This project aims to enhance RTEMS’ POSIX compliance by adding support for new functions introduced in the latest POSIX standard. Project Overview My GSoC project focuses on implementing and testing 8 key POSIX Issue 8 functions in RTEMS: ...

Contributing to Newlib: A Step-by-Step Guide If you’re interested in contributing to Newlib, the C standard library used by many embedded systems (including RTEMS and Cygwin), this guide will walk you through the process of submitting patches. What is Newlib? Newlib is a C standard library implementation intended for use on embedded systems. It’s widely used in projects like RTEMS, Cygwin, and various bare-metal environments. Part 1: Creating and Submitting Patches 1. Clone the Repository First, you need to clone the newlib-cygwin repository: ...