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 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") 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 machine = symtab.state_machine 55 if machine is None: 56 self.error("InPort declaration not part of a machine.") 57 58 code = self.slicc.codeFormatter() 59 queue_type = self.var_expr.generate(code) 60 if not queue_type.isInPort: 61 self.error("The inport queue's type must have the 'inport' " + \ 62 "attribute. Type '%s' does not have this attribute.", 63 queue_type) 64 65 type = self.queue_type.type 66 in_port = Var(self.symtab, self.ident, self.location, type, str(code), 67 self.pairs) 68 symtab.newSymbol(in_port) 69 70 symtab.pushFrame() 71 param_types = [] 72 73 # Check for Event 74 type = symtab.find("Event", Type) 75 if type is None: 76 self.error("in_port decls require 'Event' enumeration defined") 77 param_types.append(type) 78 79 # Check for Address 80 type = symtab.find("Address", Type) 81 if type is None: 82 self.error("in_port decls require 'Address' type to be defined") 83 84 param_types.append(type) 85 86 if machine.EntryType != None: 87 param_types.append(machine.EntryType) 88 if machine.TBEType != None: 89 param_types.append(machine.TBEType) 90 91 # Add the trigger method - FIXME, this is a bit dirty 92 pairs = { "external" : "yes" } 93 func = Func(self.symtab, "trigger", self.location, void_type,
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94 param_types, [], "", pairs, None)
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94 param_types, [], "", pairs) |
95 symtab.newSymbol(func) 96 97 param_types = [] 98 # Check for Event2 99 type = symtab.find("Event", Type) 100 if type is None: 101 self.error("in_port decls require 'Event' enumeration") 102 103 param_types.append(type) 104 105 # Check for Address2 106 type = symtab.find("Address", Type) 107 if type is None: 108 self.error("in_port decls require 'Address' type to be defined") 109 110 param_types.append(type) 111 112 # Add the doubleTrigger method - this hack supports tiggering 113 # two simulateous events 114 # 115 # The key is that the second transistion cannot fail because 116 # the first event cannot be undone therefore you must do some 117 # checks before calling double trigger to ensure that won't 118 # happen 119 func = Func(self.symtab, "doubleTrigger", self.location, void_type,
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120 param_types, [], "", pairs, None)
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120 param_types, [], "", pairs) |
121 symtab.newSymbol(func) 122 123 # Add the continueProcessing method - this hack supports 124 # messages that don't trigger events 125 func = Func(self.symtab, "continueProcessing", self.location,
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126 void_type, [], [], "", pairs, None)
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126 void_type, [], [], "", pairs) |
127 symtab.newSymbol(func) 128 129 if self.statements is not None: 130 rcode = self.slicc.codeFormatter() 131 rcode.indent() 132 rcode.indent() 133 self.statements.generate(rcode, None) 134 in_port["c_code_in_port"] = str(rcode) 135 136 symtab.popFrame() 137 138 # Add port to state machine 139 machine.addInPort(in_port) 140 141 # Include max_rank to be used by StateMachine.py 142 in_port["max_port_rank"] = InPortDeclAST.max_port_rank
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