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):
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33 max_port_rank = 0 34 |
35 def __init__(self, slicc, ident, msg_type, var_expr, pairs, statements): 36 super(InPortDeclAST, self).__init__(slicc, pairs) 37 38 self.ident = ident 39 self.msg_type = msg_type 40 self.var_expr = var_expr 41 self.statements = statements 42 self.queue_type = TypeAST(slicc, "InPort")
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43 if self.pairs.has_key("rank"): 44 InPortDeclAST.max_port_rank = max(self.pairs["rank"], 45 InPortDeclAST.max_port_rank) |
46 47 def __repr__(self): 48 return "[InPortDecl: %s]" % self.ident 49 50 def generate(self): 51 symtab = self.symtab 52 void_type = symtab.find("void", Type) 53 54 code = self.slicc.codeFormatter() 55 queue_type = self.var_expr.generate(code) 56 if not queue_type.isInPort: 57 self.error("The inport queue's type must have the 'inport' " + \ 58 "attribute. Type '%s' does not have this attribute.", 59 queue_type) 60 61 type = self.queue_type.type 62 in_port = Var(self.symtab, self.ident, self.location, type, str(code), 63 self.pairs) 64 symtab.newSymbol(in_port) 65 66 symtab.pushFrame() 67 param_types = [] 68 69 # Check for Event 70 type = symtab.find("Event", Type) 71 if type is None: 72 self.error("in_port decls require 'Event' enumeration defined") 73 param_types.append(type) 74 75 # Check for Address 76 type = symtab.find("Address", Type) 77 if type is None: 78 self.error("in_port decls require 'Address' type to be defined") 79 80 param_types.append(type) 81 82 # Add the trigger method - FIXME, this is a bit dirty 83 pairs = { "external" : "yes" } 84 func = Func(self.symtab, "trigger", self.location, void_type, 85 param_types, [], "", pairs, None) 86 symtab.newSymbol(func) 87 88 param_types = [] 89 # Check for Event2 90 type = symtab.find("Event", Type) 91 if type is None: 92 self.error("in_port decls require 'Event' enumeration") 93 94 param_types.append(type) 95 96 # Check for Address2 97 type = symtab.find("Address", Type) 98 if type is None: 99 self.error("in_port decls require 'Address' type to be defined") 100 101 param_types.append(type) 102 103 # Add the doubleTrigger method - this hack supports tiggering 104 # two simulateous events 105 # 106 # The key is that the second transistion cannot fail because 107 # the first event cannot be undone therefore you must do some 108 # checks before calling double trigger to ensure that won't 109 # happen 110 func = Func(self.symtab, "doubleTrigger", self.location, void_type, 111 param_types, [], "", pairs, None) 112 symtab.newSymbol(func) 113 114 # Add the continueProcessing method - this hack supports 115 # messages that don't trigger events 116 func = Func(self.symtab, "continueProcessing", self.location, 117 void_type, [], [], "", pairs, None) 118 symtab.newSymbol(func) 119 120 if self.statements is not None: 121 rcode = self.slicc.codeFormatter() 122 rcode.indent() 123 rcode.indent() 124 self.statements.generate(rcode, None) 125 in_port["c_code_in_port"] = str(rcode) 126 symtab.popFrame() 127 128 # Add port to state machine 129 machine = symtab.state_machine 130 if machine is None: 131 self.error("InPort declaration not part of a machine.") 132 133 machine.addInPort(in_port)
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134 135 # Include max_rank to be used by StateMachine.py 136 in_port["max_port_rank"] = InPortDeclAST.max_port_rank |
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