ObjDeclAST.py revision 6657:ef5fae93a3b2 
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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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
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26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from slicc.ast.DeclAST import DeclAST
29from slicc.symbols import Var
30
31class ObjDeclAST(DeclAST):
32    def __init__(self, slicc, type_ast, ident, pairs):
33        super(ObjDeclAST, self).__init__(slicc, pairs)
34
35        self.type_ast = type_ast
36        self.ident = ident
37
38    def __repr__(self):
39        return "[ObjDecl: %r]" % self.ident
40
41    def generate(self):
42        machineComponentSym = False
43
44        self["chip_object"] = "yes"
45
46        if "hack" in self:
47            warning("'hack=' is now deprecated")
48
49        if "network" in self and "virtual_network" not in self:
50            self.error("Network queues require a 'virtual_network' attribute")
51
52        type = self.type_ast.type
53        if type.isBuffer and "ordered" not in self:
54            self.error("Buffer object decls require an 'ordered' attribute")
55
56        if "ordered" in self:
57            value = self["ordered"]
58
59            if value not in ("true", "false"):
60                self.error("The 'ordered' attribute is '%s' " + \
61                           "must be 'true' or 'false'.", value)
62
63        if "random" in self:
64            value = self["random"]
65            if value not in ("true", "false"):
66                self.error("The 'random' attribute is '%s' " + \
67                           "must be 'true' or 'false'.", value)
68
69        machine = self.symtab.state_machine
70
71        # FIXME : should all use accessors here to avoid public member
72        # variables
73        if self.ident == "id":
74            c_code = "m_chip_ptr.getID()"
75        elif self.ident == "version":
76            c_code = "m_version"
77        elif self.ident == "machineID":
78            c_code = "m_machineID"
79        elif machine:
80            c_code = "(*m_%s_%s_ptr)" % (machine.ident, self.ident)
81        else:
82            c_code = "(*m_%s_ptr)" % (self.ident)
83
84        v = Var(self.symtab, self.ident, self.location, type, c_code,
85                self.pairs, machine)
86
87        if machine:
88            machine.addObject(v)
89
90        self.symtab.newSymbol(v)
91
92        # used to cheat-- that is, access components in other machines
93        if machineComponentSym:
94            self.symtab.newMachComponentSym(v)
95