THR: Test FAILED - conformance/interfaces/pthread_rwlock_rdlock/2-3.test

[cocobean]

pthread_rwlock_rdlock implementation in Haiku R1b5 must pass this OpenPOSIX test for POSIX.1-2008 conformance.

https://github.com/haiku/open_posix_testsuite/blob/from_haiku_trunk/conformance/interfaces/pthread_rwlock_rdlock/2-3.c

Expected result: Test passed Actual result: Test failed. rd_thread blocked on read lock

Tested on: Haiku hrev58305 x86 with Open POSIX Test Suite 1.5.2

[waddlesplash]

This looks intentional. The test creates a rwlock, read-locks it, creates a thread that calls wrlock, and creates another thread that calls rdlock. The last thread blocks because a writer is waiting to acquire the lock. Anything else would let reader threads starve out writer threads.

[cocobean]

Using hrev58072 source:

Note old commit: https://github.com/haiku/haiku/commit/298314fe4b1f592c5b2caf3f06a1e8a452329396

Technically, test reads that main thread and writer uses SCHED_FIFO - which isn't implemented yet in Haiku R1B5 hrev58095 and hrev57937+94.

POSIX.1-2024 was updated to clarify this functionality a bit better:

https://pubs.opengroup.org/onlinepubs/9799919799/functions/pthread_rwlock_rdlock.html