Mutex requirements#146
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nashif
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Jun 25, 2026
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- requirements: correct Mutex umbrella requirement
- requirements: add missing Mutex software requirements
The single existing Mutex requirement (ZEP-SRS-6-1) was vague, embedded a parenthetical note in its statement, and had no parent link. Reword it to state the mutex's mutual-exclusion purpose, clean up the user story wording, and link it to the Mutex system requirement (ZEP-SYRS-13). The detailed mutex behavior (locking, unlocking, ownership, recursion, priority inheritance) is added in a separate change. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The Mutex document previously contained only a single high-level requirement. Add eleven requirements (ZEP-SRS-6-2 .. ZEP-SRS-6-12) covering the implemented k_mutex behavior: definition (compile time, run time), locking (acquiring an unowned mutex, blocking on a mutex owned by another thread, lock timeout and timeout expiry), recursive locking by the owner, unlocking (by the owner and the error for a non-owner), and priority inheritance. The requirements reflect the currently implemented k_mutex API behavior following the Route 3s approach and link to the Mutex system parent (ZEP-SYRS-13). UIDs were generated with "strictdoc manage auto-uid". Signed-off-by: Anas Nashif <anas.nashif@intel.com>
parphane
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Jul 23, 2026
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Performed review:
- Agreed with change on "Mutex Kernel Object", this SW req is about Mutex. If we want a generic requirement, we should make one at system level.
- Properly traced to sys req ZEP-SYRS-13
- 4 functions covered by requirements, internal function logic defined without ambiguity
- No checklist violation https://docs.zephyrproject.org/latest/safety/safety_requirements/safety_requirements_checklist.html
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