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* lib/monitor.rb (wait): supported timeout.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shugo 2010-02-06 12:31:52 +00:00
parent cef8a996be
commit 332e8fe51f
2 changed files with 23 additions and 11 deletions
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30
lib/monitor.rb
View file

@ -87,46 +87,57 @@ module MonitorMixin
class ConditionVariable
class Timeout < Exception; end
#
# Releases the lock held in the associated monitor and waits; reacquires the lock on wakeup.
#
# If +timeout+ is given, this method returns after +timeout+ seconds passed,
# even if no other thread doesn't signal.
#
def wait(timeout = nil)
if timeout
raise NotImplementedError, "timeout is not implemented yet"
end
@monitor.__send__(:mon_check_owner)
count = @monitor.__send__(:mon_exit_for_cond)
begin
@cond.wait(@monitor.instance_variable_get("@mon_mutex"))
@cond.wait(@monitor.instance_variable_get("@mon_mutex"), timeout)
return true
ensure
@monitor.__send__(:mon_enter_for_cond, count)
end
end
#
# Calls wait repeatedly while the given block yields a truthy value.
#
def wait_while
while yield
wait
end
end
#
# Calls wait repeatedly until the given block yields a truthy value.
#
def wait_until
until yield
wait
end
end
#
# Wakes up the first thread in line waiting for this lock.
#
def signal
@monitor.__send__(:mon_check_owner)
@cond.signal
end
#
# Wakes up all threads waiting for this lock.
#
def broadcast
@monitor.__send__(:mon_check_owner)
@cond.broadcast
end
def count_waiters
raise NotImplementedError
end
private
def initialize(monitor)
@ -195,7 +206,8 @@ module MonitorMixin
alias synchronize mon_synchronize
#
# FIXME: This isn't documented in Nutshell.
# Creates a new MonitorMixin::ConditionVariable associated with the
# receiver.
#
def new_cond
return ConditionVariable.new(self)

4
test/monitor/test_monitor.rb
View file

@ -122,7 +122,7 @@ class TestMonitor < Test::Unit::TestCase
end
end
def _test_timedwait
def test_timedwait
cond = @monitor.new_cond
b = "foo"
queue2 = Queue.new
@ -153,7 +153,7 @@ class TestMonitor < Test::Unit::TestCase
@monitor.synchronize do
assert_equal("foo", c)
result3 = cond.wait(0.1)
assert_equal(false, result3)
assert_equal(true, result3) # wait always returns true in Ruby 1.9
assert_equal("foo", c)
queue3.enq(nil)
result4 = cond.wait