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# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from slicc.ast.StatementAST import StatementAST
from slicc.symbols import Var
class EnqueueStatementAST(StatementAST):
def __init__(self, slicc, queue_name, type_ast, pairs, statements):
super(EnqueueStatementAST, self).__init__(slicc, pairs)
self.queue_name = queue_name
self.type_ast = type_ast
self.statements = statements
def __repr__(self):
return "[EnqueueStatementAst: %s %s %s]" % \
(self.queue_name, self.type_ast.ident, self.statements)
def generate(self, code, return_type):
code("{")
code.indent()
self.symtab.pushFrame()
msg_type = self.type_ast.type
# Add new local var to symbol table
v = Var(self.symtab, "out_msg", self.location, msg_type, "*out_msg",
self.pairs)
self.symtab.newSymbol(v)
# Declare message
code("${{msg_type.ident}} *out_msg = \
new ${{msg_type.ident}}(curCycle());")
# The other statements
t = self.statements.generate(code, None)
self.queue_name.assertType("OutPort")
args = [ "out_msg" ]
if "latency" in self:
latency = self["latency"]
try:
# see if this is an integer
latency = int(latency)
args.append("%s" % latency)
except ValueError:
# if not, it should be a member
args.append("m_%s" % latency)
args = ", ".join(args)
code('(${{self.queue_name.var.code}}).enqueue($args);')
# End scope
self.symtab.popFrame()
code.dedent()
code("}")
def findResources(self, resources):
var = self.queue_name.var
res_count = int(resources.get(var, 0))
resources[var] = str(res_count + 1)
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