##############################################################################
#
# Copyright (c) 2004 TINY SPRL. (http://tiny.be) All Rights Reserved.
#                    Fabien Pinckaers <fp@tiny.Be>
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsability of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# garantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
##############################################################################

# Why doing some multi-thread instead of using OSE capabilities ?
# For progress bar.

#
# Add a transparant multi-thread layer to all report rendering layers
#

import threading

#
# TODO: method to stock on the disk
# Les class de reporting doivent surclasser cette classe
# Les seules methodes qui peuvent etre redefinies sont:
#     __init__
#     _render
#
class render(object):
	def __init__(self, bin_datas={}, path='.'):
		self.done = False
		self.bin_datas = bin_datas
		self.path = path
	
	def _render(self):
		return None

	def render(self):
		self.done = False
		self.sema = threading.Condition()
		class rend_thread(threading.Thread):
			def __init__(self, obj):
				self.obj = obj
				threading.Thread.__init__(self)
			def run(self):
				result = self.obj._render()
				self.obj.sema.acquire()
				self.obj._result = result
				self.obj.done = True
				self.obj.sema.release()
		r = rend_thread(self)
		r.start()
		
	def is_done(self):
		self.sema.acquire()
		res = self.done
		self.sema.release()
		return res

	def get(self):
		if self.is_done():
			return self._result
		else:
			return None

if __name__=='__main__':
	import time
	print 'Multi-thread code !'
	r = render()
	r.render()
	while not r.is_done():
		print 'not yet!'
		time.sleep(1)
	print 'done!'