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require 'thread'
require 'singleton'
module Mauve
class MauveThread
def initialize
@thread = nil
end
def logger
@logger ||= Log4r::Logger.new(self.class.to_s)
end
def run_thread(interval = 0.1)
#
# Good to go.
#
@frozen = false
@stop = false
logger.debug("Started")
@sleep_interval ||= interval
while !@stop do
#
# Schtop!
#
if @frozen
logger.debug("Frozen")
Thread.stop
logger.debug("Thawed")
end
yield
next if self.should_stop?
Kernel.sleep(@sleep_interval)
end
logger.debug("Stopped")
end
def should_stop?
@frozen or @stop
end
def freeze
logger.debug("Freezing")
@frozen = true
if @thread.is_a?(Thread)
20.times { Kernel.sleep 0.1 ; break if @thread.stop? }
logger.debug("Thread has not frozen!") unless @thread.stop?
end
end
def frozen?
defined? @frozen and @frozen and @thread.is_a?(Thread) and @thread.stop?
end
def thaw
logger.debug("Thawing")
@frozen = false
@thread.wakeup if @thread.stop?
end
def start
@logger = nil
logger.debug("Starting")
@stop = false
@thread = Thread.new{ self.run_thread { self.main_loop } }
end
def run
if self.alive?
self.thaw
else
self.start
end
end
def alive?
@thread.is_a?(Thread) and @thread.alive?
end
def stop?
@thread.is_a?(Thread) and @thread.stop?
end
def join(ok_exceptions=[])
@thread.join if @thread.is_a?(Thread)
end
def raise(ex)
@thread.raise(ex)
end
def backtrace
@thread.backtrace if @thread.is_a?(Thread)
end
def restart
self.stop
self.start
end
def stop
logger.debug("Stopping")
@stop = true
10.times do
break unless self.alive?
Kernel.sleep 1 if self.alive?
end
#
# OK I've had enough now.
#
self.kill if self.alive?
self.join
end
alias exit stop
def kill
logger.debug("Killing")
@frozen = true
@thread.kill
logger.debug("Killed")
end
def thread
@thread
end
end
end
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