diff options
Diffstat (limited to 'activesupport/test/share_lock_test.rb')
-rw-r--r-- | activesupport/test/share_lock_test.rb | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/activesupport/test/share_lock_test.rb b/activesupport/test/share_lock_test.rb index 0a5b074bee..3475ee94cd 100644 --- a/activesupport/test/share_lock_test.rb +++ b/activesupport/test/share_lock_test.rb @@ -241,6 +241,35 @@ class ShareLockTest < ActiveSupport::TestCase end end + def test_share_remains_reentrant_ignoring_a_waiting_exclusive + with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| + ready = Concurrent::CyclicBarrier.new(2) + attempt_reentrancy = Concurrent::CountDownLatch.new + + sharer = Thread.new do + @lock.sharing do + ready.wait + attempt_reentrancy.wait + @lock.sharing {} + end + end + + exclusive = Thread.new do + @lock.sharing do + ready.wait + @lock.exclusive {} + end + end + + assert_threads_stuck exclusive + + attempt_reentrancy.count_down + + assert_threads_not_stuck sharer + assert_threads_stuck exclusive + end + end + def test_in_shared_section_incompatible_non_upgrading_threads_cannot_preempt_upgrading_threads scratch_pad = [] scratch_pad_mutex = Mutex.new |