ObjectLockTest

all > gov.usgs.util > ObjectLockTest

tests

failures

ignored

10.693s

duration

100%

successful

Tests
Standard output
Standard error

Tests

Test	Duration	Result
readLockBlocksUntilWriteLockIsReleased	10.334s	passed
testWithLocks	0.252s	passed
testWithoutLocks	0.107s	passed

Standard output

The below numbers should be strictly increasing, but need not be sequential. However the displayed logic statements should (at least periodically) evaluate to false.
1 == 4
5 == 7
8 == 10
The below numbers should be strictly increasing, but need not be sequential. However the displayed logic statements should always evaluate to true.
1 == 1
2 == 2
4 == 4
5 == 5
6 == 6
8 == 8
10 == 10

Standard error

Starting threads
thread 1335 acquiring read lock
thread 1335 acquired read lock
thread 1337 acquiring write lock
thread 1336 acquiring read lock
thread 1338 acquiring write lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1335 acquiring read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1337 acquiring write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1336 acquiring read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock
thread 1338 acquiring write lock
thread 1335 acquired read lock
thread 1335 releasing read lock
thread 1335 released read lock
thread 1337 acquired write lock
thread 1337 releasing write lock
thread 1337 released write lock
thread 1336 acquired read lock
thread 1336 releasing read lock
thread 1336 released read lock
thread 1338 acquired write lock
thread 1338 releasing write lock
thread 1338 released write lock