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# -*- coding: utf-8 -*-
#
# AWL simulator - Code validator
#
# Copyright 2014-2020 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.cython_support cimport * #@cy
from awlsim.common.compat import *
from awlsim.common.util import *
from awlsim.common.exceptions import *
from awlsim.common.monotonic import * #+cimport
from awlsim.coreclient.client import *
import threading
import time
__all__ = [
"AwlValidator",
]
class AwlValidator(object):
"""Source code validation.
"""
__globalInstance = None
_PORT_RANGE = range(30000, 32000)
_EXIT_THREAD = object()
TIMEOUT = object()
@classmethod
def startup(cls):
if cls.__globalInstance:
return cls.__globalInstance
printDebug("AwlValidator: Startup")
try:
val = cls()
except AwlSimError as e:
printDebug("Failed to startup validator: %s" % str(e))
return None
cls.__globalInstance = val
return val
@classmethod
def shutdown(cls):
if cls.__globalInstance:
cls.__globalInstance.doShutdown()
cls.__globalInstance = None
@classmethod
def get(cls):
return cls.startup()
def __init__(self):
self.__thread = None
self.__job = None
self.__exception = None
self.__running = False
self.__lock = threading.Lock()
self.__condition = threading.Condition(self.__lock)
self.__client = AwlSimClient()
try:
self.__client.setLoglevel(Logging.LOG_ERROR,
setClientSide=False,
setServerSide=True)
self.__client.spawnServer(listenHost = "localhost",
listenPort = self._PORT_RANGE)
self.__client.connectToServer(host = "localhost",
port = self.__client.serverProcessPort)
self.__client.setLoglevel(Logging.LOG_NONE,
setClientSide=False,
setServerSide=True)
except AwlSimError as e:
self.doShutdown()
raise e
self.__thread = threading.Thread(target=self.__threadFunc)
self.__thread.daemon = False
self.__thread.start()
def doShutdown(self):
printDebug("AwlValidator: Shutdown")
if self.__client:
self.__client.shutdown()
self.__client = None
if self.__thread:
with self.__lock:
self.__job = self._EXIT_THREAD
self.__condition.notify_all()
self.__thread.join()
self.__thread = None
self.__exception = None
self.__running = False
def __runJob(self, job):
(project,
symTabSources, libSelections, awlSources,
fupSources, kopSources) = job
client = self.__client
exception = None
try:
client.setRunState(False)
client.reset()
client.loadProject(
project,
loadSymTabs=(symTabSources is None),
loadLibSelections=(libSelections is None),
loadSources=(awlSources is None),
loadFup=(fupSources is None),
loadKop=(kopSources is None))
if symTabSources is not None:
client.loadSymTabSources(symTabSources)
if libSelections is not None:
client.loadLibraryBlocks(libSelections)
if awlSources is not None:
client.loadAwlSources(awlSources)
if fupSources is not None:
client.loadFupSources(fupSources)
if kopSources is not None:
client.loadKopSources(kopSources)
client.build()
client.reset()
except AwlSimError as e:
exception = e
with self.__lock:
if self.__job is None:
self.__running = False
self.__exception = exception
def __threadFunc(self):
"""This is the validation thread.
"""
while True:
with self.__lock:
if self.__job is None:
self.__condition.wait()
job, self.__job = self.__job, None
if job is self._EXIT_THREAD:
break
if job:
self.__runJob(job)
def validate(self, project,
symTabSources=None, libSelections=None, awlSources=None,
fupSources=None, kopSources=None):
"""Schedule a validation.
Get the result with getState().
"""
if not project:
return
with self.__lock:
if self.__job is self._EXIT_THREAD:
return
self.__job = (project,
symTabSources, libSelections, awlSources,
fupSources, kopSources)
self.__running = True
self.__condition.notify_all()
def __waitSync(self, timeout, sleepFunc):
exception = None
running = True
end = monotonic_time() + timeout
while monotonic_time() < end:
running, exception = self.getState()
if not running:
break
sleepFunc(0.1)
return running, exception
def validateSync(self, project,
symTabSources=None, libSelections=None, awlSources=None,
fupSources=None, kopSources=None,
sync=False,
timeout=5.0,
sleepFunc=time.sleep):
"""Synchronous validation. Wait for completion.
Returns the exception, None or TIMEOUT.
"""
if not project:
return None
# Wait for currently running job, if any.
running, exception = self.__waitSync(timeout, sleepFunc)
if running:
return self.TIMEOUT
# Start new job.
self.validate(project=project,
symTabSources=symTabSources,
libSelections=libSelections,
awlSources=awlSources,
fupSources=fupSources,
kopSources=kopSources)
# Wait for the job.
running, exception = self.__waitSync(timeout, sleepFunc)
if running:
return self.TIMEOUT
return exception
def getState(self):
"""Get the validation result.
Returns a tuple (running, exception).
"""
with self.__lock:
running = self.__running
exception = self.__exception
return running, exception
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