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require "helper"
class IntegrationPendingTestCase < SQLite3::TestCase
class ThreadSynchronizer
def initialize
@main_to_thread = Queue.new
@thread_to_main = Queue.new
end
def send_to_thread state
@main_to_thread.push state
end
def send_to_main state
@thread_to_main.push state
end
def wait_for_thread expected_state, non_block = false
state = @thread_to_main.pop(non_block)
raise "Invalid state #{state}. #{expected_state} is expected" if state != expected_state
end
def wait_for_main expected_state, non_block = false
state = @main_to_thread.pop(non_block)
raise "Invalid state #{state}. #{expected_state} is expected" if state != expected_state
end
def close_thread
@thread_to_main.close
end
def close_main
@main_to_thread.close
end
def close
close_thread
close_main
end
end
def setup
@db = SQLite3::Database.new("test.db")
@db.transaction do
@db.execute "create table foo ( a integer primary key, b text )"
@db.execute "insert into foo ( b ) values ( 'foo' )"
@db.execute "insert into foo ( b ) values ( 'bar' )"
@db.execute "insert into foo ( b ) values ( 'baz' )"
end
end
def teardown
@db.close
File.delete("test.db")
end
def test_busy_handler_impatient
synchronizer = ThreadSynchronizer.new
handler_call_count = 0
t = Thread.new(synchronizer) do |sync|
db2 = SQLite3::Database.open("test.db")
db2.transaction(:exclusive) do
sync.send_to_main :ready_0
sync.wait_for_main :end_1
end
ensure
db2&.close
sync.close_thread
end
synchronizer.wait_for_thread :ready_0
@db.busy_handler do
handler_call_count += 1
false
end
assert_raise(SQLite3::BusyException) do
@db.execute "insert into foo (b) values ( 'from 2' )"
end
assert_equal 1, handler_call_count
synchronizer.send_to_thread :end_1
synchronizer.close_main
t.join
end
def test_busy_timeout
@db.busy_timeout 1000
synchronizer = ThreadSynchronizer.new
t = Thread.new(synchronizer) do |sync|
db2 = SQLite3::Database.open("test.db")
db2.transaction(:exclusive) do
sync.send_to_main :ready_0
sync.wait_for_main :end_1
end
ensure
db2&.close
sync.close_thread
end
synchronizer.wait_for_thread :ready_0
start_time = Time.now
assert_raise(SQLite3::BusyException) do
@db.execute "insert into foo (b) values ( 'from 2' )"
end
end_time = Time.now
assert_operator(end_time - start_time, :>=, 1.0)
synchronizer.send_to_thread :end_1
synchronizer.close_main
t.join
end
def test_busy_handler_timeout_releases_gvl
@db.busy_handler_timeout = 100
t1sync = ThreadSynchronizer.new
t2sync = ThreadSynchronizer.new
busy = Mutex.new
busy.lock
count = 0
active_thread = Thread.new(t1sync) do |sync|
sync.send_to_main :ready
sync.wait_for_main :start
loop do
sleep 0.005
count += 1
begin
sync.wait_for_main :end, true
break
rescue ThreadError
end
end
sync.send_to_main :done
end
blocking_thread = Thread.new(t2sync) do |sync|
db2 = SQLite3::Database.open("test.db")
db2.transaction(:exclusive) do
sync.send_to_main :ready
busy.lock
end
sync.send_to_main :done
ensure
db2&.close
end
t1sync.wait_for_thread :ready
t2sync.wait_for_thread :ready
t1sync.send_to_thread :start
assert_raises(SQLite3::BusyException) do
@db.execute "insert into foo (b) values ( 'from 2' )"
end
t1sync.send_to_thread :end
busy.unlock
t2sync.wait_for_thread :done
expected = if RUBY_PLATFORM.include?("linux")
# 20 is the theoretical max if timeout is 100ms and active thread sleeps 5ms
15
else
# in CI, macos and windows systems seem to really not thread very well, so let's set a lower bar.
2
end
assert_operator(count, :>=, expected)
ensure
active_thread&.join
blocking_thread&.join
t1sync&.close
t2sync&.close
end
def test_busy_handler_outwait
synchronizer = ThreadSynchronizer.new
handler_call_count = 0
t = Thread.new(synchronizer) do |sync|
db2 = SQLite3::Database.open("test.db")
db2.transaction(:exclusive) do
sync.send_to_main :ready_0
sync.wait_for_main :busy_handler_called_1
end
sync.send_to_main :end_of_transaction_2
ensure
db2&.close
sync.close_thread
end
synchronizer.wait_for_thread :ready_0
@db.busy_handler do |count|
handler_call_count += 1
synchronizer.send_to_thread :busy_handler_called_1
synchronizer.wait_for_thread :end_of_transaction_2
true
end
assert_nothing_raised do
@db.execute "insert into foo (b) values ( 'from 2' )"
end
assert_equal 1, handler_call_count
synchronizer.close_main
t.join
end
end
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