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# -*- coding: utf-8 -*-
#
# AWL simulator - Asynchronous code validator
#
# Copyright 2014-2015 Michael Buesch <m@bues.ch>
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
import multiprocessing
from awlsim.common.util import *
from awlsim.common.debug import *
from awlsim.core import *
_VALIDATOR_DEBUG = 0
def __awlValidatorWorker(text):
if _VALIDATOR_DEBUG:
print("Validation worker: started")
# Try to parse and translate the text.
# On error return the erratic line numbers.
errLines = ()
try:
p = AwlParser()
p.parseText(text)
s = AwlSim()
s.getCPU().enableExtendedInsns(True)
s.load(p.getParseTree())
except AwlSimError as e:
lineNr = e.getLineNr()
if lineNr is not None:
lineNr -= 1
errLines = ( lineNr, )
except UnicodeError as e:
pass
except Exception as e:
print("Validation worker exception: %s" % str(e))
if _VALIDATOR_DEBUG:
print("Validation worker: done %s" % str(errLines))
return errLines
def _awlValidatorWorker(text):
errLines = __awlValidatorWorker(text)
garbageCollector.collect()
return errLines
class AwlValidatorResult(object):
def __init__(self, mpAsync, result=None):
self.__mpAsync = mpAsync
self.__result = result
def ready(self):
if self.__result is not None:
return True
return self.__mpAsync.ready()
def getErrLines(self):
if self.__result is not None:
return self.__result
return self.__mpAsync.get(None)
class AwlValidator(object):
__instance = None
@classmethod
def startup(cls, synchronous = False):
assert(cls.__instance is None)
garbageCollector.collect()
if isPy2Compat and not synchronous:
#FIXME: Asynchronous validator is currently broken on Py2.
printInfo("Python 2: Enforcing synchronous validator.")
synchronous = True
cls.__instance = cls(synchronous)
@classmethod
def get(cls):
assert(cls.__instance)
return cls.__instance
@staticmethod
def __cpu_count():
try:
return multiprocessing.cpu_count()
except NotImplementedError:
return 1
def __init__(self, synchronous=False,
minNrWorkers=2, maxNrWorkers=4):
if synchronous:
if _VALIDATOR_DEBUG:
print("Using synchronous AWL code validation")
self.__pool = None
else:
if _VALIDATOR_DEBUG:
print("Using asynchronous AWL code validation")
nrWorkers = max(minNrWorkers,
min(maxNrWorkers, self.__cpu_count()))
self.__pool = multiprocessing.Pool(processes = nrWorkers)
def shutdown(self):
if not self.__pool:
return
self.__pool.close()
self.__pool.terminate()
self.__pool.join()
del self.__pool
self.__pool = None
garbageCollector.collect()
def enqueue(self, sourceText):
sourceText = str(sourceText)
if self.__pool:
mpAsync = self.__pool.apply_async(_awlValidatorWorker,
(sourceText,))
return AwlValidatorResult(mpAsync)
else:
return AwlValidatorResult(None,
result = _awlValidatorWorker(sourceText))
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