MachineAST.py revision 9773:915be89faf30 
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
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9# redistributions in binary form must reproduce the above copyright
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14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27
28from slicc.ast.DeclAST import DeclAST
29from slicc.symbols import StateMachine, Type
30
31class MachineAST(DeclAST):
32    def __init__(self, slicc, idents, pairs_ast, config_parameters, decls):
33        super(MachineAST, self).__init__(slicc, pairs_ast)
34
35        self.ident = idents[0]
36        self.machine_types = idents
37        self.pairs_ast = pairs_ast
38        self.config_parameters = config_parameters
39        self.decls = decls
40
41    def __repr__(self):
42        return "[Machine: %r]" % self.ident
43
44    def files(self, parent=None):
45        s = set(('%s_Controller.cc' % self.ident,
46                 '%s_Controller.hh' % self.ident,
47                 '%s_Controller.py' % self.ident,
48                 '%s_Transitions.cc' % self.ident,
49                 '%s_Wakeup.cc' % self.ident))
50
51        s |= self.decls.files(self.ident)
52        return s
53
54    def generate(self):
55        # Make a new frame
56        self.symtab.pushFrame()
57
58        # Create a new machine
59        machine = StateMachine(self.symtab, self.ident, self.location,
60                               self.pairs, self.config_parameters)
61
62        self.symtab.newCurrentMachine(machine)
63
64        # Generate code for all the internal decls
65        self.decls.generate()
66
67        # Build the transition table
68        machine.buildTable()
69
70        # Pop the frame
71        self.symtab.popFrame()
72
73    def findMachines(self):
74        # Add to MachineType enumeration
75        for mtype in self.machine_types:
76            machine_type = self.symtab.find("MachineType", Type)
77            pairs = self.pairs_ast.pairs
78
79            if mtype == self.ident:
80                pairs["Primary"] = True
81            else:
82                pairs["Primary"] = False
83
84            if not machine_type.addEnum(mtype, pairs):
85                self.error("Duplicate machine name: %s:%s" % (
86                            machine_type, mtype))
87
88        # Generate code for all the internal decls
89        self.decls.findMachines()
90