#16709: THR: Test FAILED - conformance/interfaces/pthread_rwlock_rdlock/2-3.test
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Reporter: cocobean | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone:
| Unscheduled
Component: System/POSIX | Version:
Keywords: POSIX, pthreads, | R1/Development
pthread_rwlock_rdlock | Blocked By:
Blocking: | Platform: All
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Test that pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
If the Thread Execution Scheduling option is supported, and the threads
involved in the lock are executing with the scheduling policies SCHED_FIFO
or SCHED_RR, the calling thread shall not acquire the lock if a writer
holds the lock or if writers of higher or equal priority are blocked on
the lock; otherwise, the calling thread shall acquire the lock.
In this case, reader has higher priority than the writer
Steps:
We have three threads, main(also a reader), writer, reader
{{{
1. Main thread set its shcedule policy as "SCHED_FIFO", with highest
priority the three: sched_get_priority_min()+2.
2. Main thread read lock 'rwlock'
3. Create a writer thread, with schedule policy as "SCHED_FIFO", and
priority using sched_get_priority_min().
4. The thread write lock 'rwlock', should block.
5. Main thread create a reader thread, with schedule policy as
"SCHED_FIFO", and priority sched_get_priority_min()+1
6. Reader thread read lock 'rwlock', shouldn't block, since it has a
higher priority than the writer blocked on 'rwlock'
7. Main thread release the 'rwlock', the writer should get the lock
first.
}}}
NOTE: The test result is UNSUPPORTED if Thread Execution Scheduling option
is not supported.
Ref:
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 hrev54815 x86 with Open POSIX Test Suite 1.5.2
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Ticket URL: <https://dev.haiku-os.org/ticket/16709>
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