diff options
Diffstat (limited to 'lib/monitor.rb')
| -rw-r--r-- | lib/monitor.rb | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/monitor.rb b/lib/monitor.rb index 288ed755ea..86c779f184 100644 --- a/lib/monitor.rb +++ b/lib/monitor.rb @@ -251,9 +251,12 @@ module MonitorMixin # Initializes the MonitorMixin after being included in a class or when an # object has been extended with the MonitorMixin def mon_initialize + if defined?(@mon_mutex) + raise ThreadError, "already initialized" + end + @mon_mutex = Thread::Mutex.new @mon_owner = nil @mon_count = 0 - @mon_mutex = Thread::Mutex.new end def mon_check_owner |