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📦 QUEUE_LIB – Changelog

All notable changes to this project will be documented in this file. This project adheres to Semantic Versioning.

[1.0.4] – 2026-03-05

Type: Feature / Unit Test Expansion / API Enhancement Previous Release: [1.0.1]

🧩 Added

  • Queue peek API: queue_peek() to inspect the first element without removing it.
  • Expanded unit tests: separated tests into groups (queue_init, queue_push, queue_pop, queue_peek, queue_state, queue_core, DV_QUEUE_001).
  • Additional edge-case and MISRA coverage tests: wrap-around, multiple struct types, float alignment, zero-byte element, null-pointer handling.
  • Enhanced DV_QUEUE_001 test suite to fully verify MISRA Deviation DV-QUEUE-001.

🔄 Changed

  • Reorganized unit tests to improve readability and maintainability.
  • Updated documentation to reflect new API and test grouping.
  • Corrected previous file version numbers in headers to match release numbering (1.0.4).

🧱 Fixed

  • Minor fixes in test setups for wrap-around scenarios and zero-element edge cases.
  • Ensured queue_peek() maintains queue state correctly.

📋 Notes

  • Full backward compatibility with previous releases preserved.
  • Static analysis: PASSED (cppcheck, gcc -Wall -Wextra -pedantic).
  • Unit tests: All grouped tests passed; coverage validated via GCOVR.
  • Ready for MISRA-C:2012 and ISO 26262 compliant integration.

[1.0.1] – 2025-11-06

Type: Maintenance / MISRA Compliance / Documentation Update Previous Release: [1.0.0]

🧩 Added

  • Static helper function: validate_init_arg() for input validation during initialization.
  • Doxygen groups: @defgroup queue (public API) and @defgroup queue_internal (internal static functions).
  • Extended MISRA compliance documentation (DV-QUEUE-001 justification).
  • Added explicit grouping and cross-linking for MkDocs + Doxygen integration.

🔄 Changed

  • Changed linkage of validate_init_arg() from PRIVATE to static (MISRA Rule 8.8).
  • Replaced literal pointer constants (type*)0 with <stddef.h> NULL (MISRA Rule 21.6).
  • Renamed element_size → buffer_element_size for consistent naming and readability.
  • Added explicit boolean handling in queue_is_empty() and queue_is_full().
  • Improved @file, @details, and @ingroup Doxygen documentation blocks.
  • Unified and clarified MISRA Deviation Table formatting and references.

🧱 Fixed

  • Ensured proper internal linkage (no unintended external visibility of internal helpers).
  • Defensive handling in copy_bytes() for null-pointer safety.

📋 Notes

  • No API or functional behavior changes from v1.0.0.
  • Full backward compatibility preserved.
  • Static analysis: PASSED (cppcheck, gcc -Wall -Wextra -pedantic).
  • Unit tests: All DV_QUEUE_001 tests passed.
  • Ready for MISRA-C:2012 and ISO 26262 compliant integration.

[1.0.0] – 2025-10-26

Type: Initial Release

🧩 Features

  • Deterministic, static FIFO queue (no dynamic allocation).

  • Simple API:

  • queue_init

  • queue_push
  • queue_pop
  • queue_is_empty
  • queue_is_full
  • Type-agnostic design — supports any data type.
  • Safe and MISRA-C:2012–aware implementation.
  • Includes example usage and Unity-based unit tests.
  • Licensed under MIT License.

📘 Summary

First public release of QUEUE_LIB, a deterministic FIFO queue implementation for embedded and safety-critical applications. Designed for use in ISO 26262 / IEC 61508–compliant software modules.

🧭 Version History

Version Date Type / Focus Status
1.0.0 2025-10-26 Initial Release ✅ Stable
1.0.1 2025-11-06 MISRA Compliance & Documentation Fix ✅ Stable
1.0.4 2026-03-05 API Enhancement & Unit Test Expansion ✅ Stable

© 2025–2026 niwciu Licensed under the MIT License.