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# coding: UTF8
# Copyright 2009 Thomas Jourdan
#
# 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 3 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import sys
import threading
import gobject
import ka_debug
#gtk.gdk.threads_init()
_internal_lock = threading.Lock()
_internal_task_count = 0
def _enter():
"""
pre: _internal_task_count >= 0
post: _internal_task_count >= 1
"""
_internal_lock.acquire()
global _internal_task_count
_internal_task_count += 1
_internal_lock.release()
def _leave():
"""
pre: _internal_task_count >= 1
post: _internal_task_count >= 0
"""
_internal_lock.acquire()
global _internal_task_count
_internal_task_count -= 1
_internal_lock.release()
def is_completed():
"""
pre: _internal_task_count >= 0
"""
global _internal_task_count
return _internal_task_count < 1
class GeneratorTask(object):
def __init__(self, task_function, on_task_completed):
"""
pre: task_function is not None and callable(task_function)
pre: on_task_completed is not None and callable(on_task_completed)
"""
self._on_task_completed = on_task_completed
self._task_function = task_function
def _start(self, *args, **kwargs):
try:
_enter()
result = self._task_function(*args)
print 'result', result
gobject.idle_add(self._on_task_completed, result)
except:
ka_debug.err('failed calculating [%s] [%s] [%s]' % \
(self._task_function, sys.exc_info()[0], sys.exc_info()[1]))
finally:
_leave()
def start(self, *args, **kwargs):
threading.Thread(target=self._start, args=args, kwargs=kwargs).start()
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