InPortDeclAST.py revision 10984
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.ast.TypeAST import TypeAST 30from slicc.symbols import Func, Type, Var 31 32class InPortDeclAST(DeclAST): 33 def __init__(self, slicc, ident, msg_type, var_expr, pairs, statements): 34 super(InPortDeclAST, self).__init__(slicc, pairs) 35 36 self.ident = ident 37 self.msg_type = msg_type 38 self.var_expr = var_expr 39 self.statements = statements 40 self.queue_type = TypeAST(slicc, "InPort") 41 42 def __repr__(self): 43 return "[InPortDecl: %s]" % self.ident 44 45 def generate(self): 46 symtab = self.symtab 47 void_type = symtab.find("void", Type) 48 49 machine = symtab.state_machine 50 if machine is None: 51 self.error("InPort declaration not part of a machine.") 52 53 code = self.slicc.codeFormatter() 54 queue_type = self.var_expr.generate(code) 55 if not queue_type.isInPort: 56 self.error("The inport queue's type must have the 'inport' " + \ 57 "attribute. Type '%s' does not have this attribute.", 58 queue_type) 59 60 type = self.queue_type.type 61 in_port = Var(self.symtab, self.ident, self.location, type, str(code), 62 self.pairs, machine, self.var_expr) 63 symtab.newSymbol(in_port) 64 65 symtab.pushFrame() 66 param_types = [] 67 68 # Check for Event 69 type = symtab.find("Event", Type) 70 if type is None: 71 self.error("in_port decls require 'Event' enumeration defined") 72 param_types.append(type) 73 74 # Check for Address 75 type = symtab.find("Address", Type) 76 if type is None: 77 self.error("in_port decls require 'Address' type to be defined") 78 79 param_types.append(type) 80 81 if machine.EntryType != None: 82 param_types.append(machine.EntryType) 83 if machine.TBEType != None: 84 param_types.append(machine.TBEType) 85 86 # Add the trigger method - FIXME, this is a bit dirty 87 pairs = { "external" : "yes" } 88 trigger_func_name = "trigger" 89 for param in param_types: 90 trigger_func_name += "_" + param.ident 91 func = Func(self.symtab, trigger_func_name, "trigger", self.location, 92 void_type, param_types, [], "", pairs) 93 symtab.newSymbol(func) 94 95 # Add the stallPort method - this hacks reschedules the controller 96 # for stalled messages that don't trigger events 97 func = Func(self.symtab, "stallPort", "stallPort", self.location, 98 void_type, [], [], "", pairs) 99 symtab.newSymbol(func) 100 101 param_types = [] 102 # Check for Event2 103 type = symtab.find("Event", Type) 104 if type is None: 105 self.error("in_port decls require 'Event' enumeration") 106 107 param_types.append(type) 108 109 # Check for Address2 110 type = symtab.find("Address", Type) 111 if type is None: 112 self.error("in_port decls require 'Address' type to be defined") 113 114 param_types.append(type) 115 116 if self.statements is not None: 117 rcode = self.slicc.codeFormatter() 118 rcode.indent() 119 rcode.indent() 120 self.statements.generate(rcode, None) 121 in_port["c_code_in_port"] = str(rcode) 122 123 symtab.popFrame() 124 125 # Add port to state machine 126 machine.addInPort(in_port) 127