MachineAST.py revision 11282 
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from slicc.ast.DeclAST import DeclAST
29from slicc.symbols import StateMachine, Type
30
31class MachineAST(DeclAST):
32    def __init__(self, slicc, ident, pairs_ast, config_parameters, decls):
33        super(MachineAST, self).__init__(slicc, pairs_ast)
34
35        self.ident = ident
36        self.pairs_ast = pairs_ast
37        self.config_parameters = config_parameters
38        self.decls = decls
39
40    def __repr__(self):
41        return "[Machine: %r]" % self.ident
42
43    def files(self, parent=None):
44        s = set(('%s_Controller.cc' % self.ident,
45                 '%s_Controller.hh' % self.ident,
46                 '%s_Controller.py' % self.ident,
47                 '%s_Transitions.cc' % self.ident,
48                 '%s_Wakeup.cc' % self.ident))
49
50        s |= self.decls.files(self.ident)
51        return s
52
53    def generate(self):
54        # Make a new frame
55        self.symtab.pushFrame()
56
57        # Create a new machine
58        machine = StateMachine(self.symtab, self.ident, self.location,
59                               self.pairs, self.config_parameters)
60
61        self.symtab.newCurrentMachine(machine)
62
63        # Generate code for all the internal decls
64        self.decls.generate()
65
66        # Build the transition table
67        machine.buildTable()
68
69        # Pop the frame
70        self.symtab.popFrame()
71
72    def findMachines(self):
73        mtype = self.ident
74        machine_type = self.symtab.find("MachineType", Type)
75        pairs = self.pairs_ast.pairs
76
77        pairs["Primary"] = True
78        if not machine_type.addEnum(mtype, pairs):
79            self.error("Duplicate machine name: %s:%s" % (machine_type, mtype))
80
81        # Generate code for all the internal decls
82        self.decls.findMachines()
83