CrystaX NDK

Use case:

• Main thread set its shcedule policy as "SCHED_FIFO", with highest priority: sched_get_priority_min()+3.
• Main thread write lock 'rwlock'
• Create a writer1 thread, with schedule policy as "SCHED_FIFO", and priority using sched_get_priority_min()+2. The writer should block.
• Create reader thread, with same priority as writer1. The reader should also block.
• Create a writer2 thread, with priority sched_get_priority_min(). It should block on write lock too.
• Main thread release the 'rwlock'

Expected order of lock:

1. writer1
2. reader
3. writer2

Actual order:

1. writer1
2. writer2
3. reader