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# -*- coding: utf-8 -*-
#
# AWL simulator - FUP compiler - Base object
#
# Copyright 2016 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 *
from awlsim.common.util import *
from awlsim.common.enumeration import *
from awlsim.common.exceptions import *
class FupCompilerError(AwlSimError):
"""FUP compiler exception.
"""
def __init__(self, message, fupObj=None):
if fupObj:
fupObjStr = str(fupObj).strip()
if fupObjStr:
message += "\n\nThe reporting FUP/FBD element is:\n"\
"%s" % fupObjStr
AwlSimError.__init__(self, message)
self.fupObj = fupObj
class FupInterfError(FupCompilerError):
"""FUP compiler exception in FUP interface.
"""
class FupDeclError(FupCompilerError):
"""FUP compiler exception in FUP declaration.
"""
class FupGridError(FupCompilerError):
"""FUP compiler exception in FUP grid.
"""
class FupConnError(FupCompilerError):
"""FUP compiler exception in FUP connection.
"""
class FupElemError(FupCompilerError):
"""FUP compiler exception in FUP element.
"""
class FupOperError(FupElemError):
"""FUP compiler exception in FUP operator.
"""
class FupCompiler_BaseObj(object):
"""FUP compiler base class.
"""
factory = None
# compileState values
EnumGen.start
COMPILE_IDLE = EnumGen.item
COMPILE_PREPROCESSING = EnumGen.item
COMPILE_PREPROCESSED = EnumGen.item
COMPILE_RUNNING = EnumGen.item
COMPILE_DONE = EnumGen.item
EnumGen.end
compileState2name = {
COMPILE_IDLE : "COMPILE_IDLE",
COMPILE_PREPROCESSING : "COMPILE_PREPROCESSING",
COMPILE_PREPROCESSED : "COMPILE_PREPROCESSED",
COMPILE_RUNNING : "COMPILE_RUNNING",
COMPILE_DONE : "COMPILE_DONE",
}
# Set to True, if preprocessing is not used for this object.
noPreprocessing = False
# Allow certain state transitions?
allowTrans_done2Running = False # DONE -> RUNNING
__slots__ = (
"__uuid",
"__compileState",
)
def __init__(self, uuid=None):
self.__compileState = self.COMPILE_IDLE
self.uuid = uuid
@property
def uuid(self):
return self.__uuid
@uuid.setter
def uuid(self, uuid):
self.__uuid = uuid or "00000000-0000-0000-0000-000000000000"
@property
def isCompileEntryPoint(self):
"""Return True, if this element is a compilation entry point.
Override this, if this element (possibly) is an entry point.
The default implementation returns False.
"""
return False
@property
def needPreprocess(self):
return self.__compileState < self.COMPILE_PREPROCESSING
@property
def needCompile(self):
return self.__compileState < self.COMPILE_RUNNING
@property
def compileState(self):
return self.__compileState
@compileState.setter
def compileState(self, state):
if self.noPreprocessing:
allowedTransitions_IDLE = (self.COMPILE_RUNNING, )
allowedTransitions_PREPROCESSING = ()
allowedTransitions_PREPROCESSED = ()
else:
allowedTransitions_IDLE = (self.COMPILE_PREPROCESSING, )
allowedTransitions_PREPROCESSING = (self.COMPILE_PREPROCESSED, )
allowedTransitions_PREPROCESSED = (self.COMPILE_RUNNING, )
allowedTransitions_RUNNING = (self.COMPILE_DONE, )
if self.allowTrans_done2Running:
allowedTransitions_DONE = (self.COMPILE_RUNNING, )
else:
allowedTransitions_DONE = ()
allowedTransitionsMap = {
# fromState : (toStates)
self.COMPILE_IDLE : allowedTransitions_IDLE,
self.COMPILE_PREPROCESSING : allowedTransitions_PREPROCESSING,
self.COMPILE_PREPROCESSED : allowedTransitions_PREPROCESSED,
self.COMPILE_RUNNING : allowedTransitions_RUNNING,
self.COMPILE_DONE : allowedTransitions_DONE,
}
allowedTransitions = allowedTransitionsMap[self.__compileState]
if self.__compileState == state:
if state == self.COMPILE_RUNNING:
raise FupCompilerError(
"Tried to set FUP/FBD element state to "
"%s while already being in that state.\n"
"This most likely happened due to some dependency "
"loop in the FBD/FUP diagram.\n"
"Please check the diagram for signal loops." % (
self.compileState2name[state]),
self)
if state not in allowedTransitions:
raise FupCompilerError(
"The FUP/FBD element compile state transition "
"from %s to %s is not allowed." % (
self.compileState2name[self.__compileState],
self.compileState2name[state]),
self)
self.forceCompileState(state)
def forceCompileState(self, state):
self.__compileState = state
def __eq__(self, other):
return self is other
def __ne__(self, other):
return self is not other
def __hash__(self):
return id(self)
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