diff options
Diffstat (limited to 'activesupport/test/share_lock_test.rb')
-rw-r--r-- | activesupport/test/share_lock_test.rb | 102 |
1 files changed, 50 insertions, 52 deletions
diff --git a/activesupport/test/share_lock_test.rb b/activesupport/test/share_lock_test.rb index 34479020e1..30a1ddad3f 100644 --- a/activesupport/test/share_lock_test.rb +++ b/activesupport/test/share_lock_test.rb @@ -115,68 +115,66 @@ class ShareLockTest < ActiveSupport::TestCase def test_exclusive_conflicting_purpose [true, false].each do |use_upgrading| with_thread_waiting_in_lock_section(:sharing) do |sharing_thread_release_latch| - begin - together = Concurrent::CyclicBarrier.new(2) - conflicting_exclusive_threads = [ - Thread.new do - @lock.send(use_upgrading ? :sharing : :tap) do - together.wait - @lock.exclusive(purpose: :red, compatible: [:green, :purple]) { } - end - end, - Thread.new do - @lock.send(use_upgrading ? :sharing : :tap) do - together.wait - @lock.exclusive(purpose: :blue, compatible: [:green]) { } - end + together = Concurrent::CyclicBarrier.new(2) + conflicting_exclusive_threads = [ + Thread.new do + @lock.send(use_upgrading ? :sharing : :tap) do + together.wait + @lock.exclusive(purpose: :red, compatible: [:green, :purple]) { } + end + end, + Thread.new do + @lock.send(use_upgrading ? :sharing : :tap) do + together.wait + @lock.exclusive(purpose: :blue, compatible: [:green]) { } end - ] - - assert_threads_stuck conflicting_exclusive_threads # wait for threads to get into their respective `exclusive {}` blocks - - # This thread will be stuck as long as any other thread is in - # a sharing block. While it's blocked, it holds no lock, so it - # doesn't interfere with any other attempts. - no_purpose_thread = Thread.new do - @lock.exclusive { } end - assert_threads_stuck no_purpose_thread + ] - # This thread is compatible with both of the "primary" - # attempts above. It's initially stuck on the outer share - # lock, but as soon as that's released, it can run -- - # regardless of whether those threads hold share locks. - compatible_thread = Thread.new do - @lock.exclusive(purpose: :green, compatible: []) { } - end - assert_threads_stuck compatible_thread + assert_threads_stuck conflicting_exclusive_threads # wait for threads to get into their respective `exclusive {}` blocks - assert_threads_stuck conflicting_exclusive_threads + # This thread will be stuck as long as any other thread is in + # a sharing block. While it's blocked, it holds no lock, so it + # doesn't interfere with any other attempts. + no_purpose_thread = Thread.new do + @lock.exclusive { } + end + assert_threads_stuck no_purpose_thread + + # This thread is compatible with both of the "primary" + # attempts above. It's initially stuck on the outer share + # lock, but as soon as that's released, it can run -- + # regardless of whether those threads hold share locks. + compatible_thread = Thread.new do + @lock.exclusive(purpose: :green, compatible: []) { } + end + assert_threads_stuck compatible_thread - sharing_thread_release_latch.count_down + assert_threads_stuck conflicting_exclusive_threads - assert_threads_not_stuck compatible_thread # compatible thread is now able to squeak through + sharing_thread_release_latch.count_down - if use_upgrading - # The "primary" threads both each hold a share lock, and are - # mutually incompatible; they're still stuck. - assert_threads_stuck conflicting_exclusive_threads + assert_threads_not_stuck compatible_thread # compatible thread is now able to squeak through - # The thread without a specified purpose is also stuck; it's - # not compatible with anything. - assert_threads_stuck no_purpose_thread - else - # As the primaries didn't hold a share lock, as soon as the - # outer one was released, all the exclusive locks are free - # to be acquired in turn. + if use_upgrading + # The "primary" threads both each hold a share lock, and are + # mutually incompatible; they're still stuck. + assert_threads_stuck conflicting_exclusive_threads - assert_threads_not_stuck conflicting_exclusive_threads - assert_threads_not_stuck no_purpose_thread - end - ensure - conflicting_exclusive_threads.each(&:kill) - no_purpose_thread.kill + # The thread without a specified purpose is also stuck; it's + # not compatible with anything. + assert_threads_stuck no_purpose_thread + else + # As the primaries didn't hold a share lock, as soon as the + # outer one was released, all the exclusive locks are free + # to be acquired in turn. + + assert_threads_not_stuck conflicting_exclusive_threads + assert_threads_not_stuck no_purpose_thread end + ensure + conflicting_exclusive_threads.each(&:kill) + no_purpose_thread.kill end end end |