74 lines
3 KiB
Python
74 lines
3 KiB
Python
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# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
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# Copyright (c) 2009 The Hewlett-Packard Development Company
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from slicc.ast.StatementAST import StatementAST
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from slicc.symbols import Var
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class PeekStatementAST(StatementAST):
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def __init__(self, slicc, queue_name, type_ast, statements, method):
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super(PeekStatementAST, self).__init__(slicc)
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self.queue_name = queue_name
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self.type_ast = type_ast
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self.statements = statements
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self.method = method
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def __repr__(self):
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return "[PeekStatementAST: %r queue_name: %r type: %r %r]" % \
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(self.method, self.queue_name, self.type_ast, self.statements)
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def generate(self, code, return_type):
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self.symtab.pushFrame()
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msg_type = self.type_ast.type
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# Add new local var to symbol table
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var = Var(self.symtab, "in_msg", self.location, msg_type, "(*in_msg_ptr)",
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self.pairs)
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self.symtab.newSymbol(var)
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# Check the queue type
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self.queue_name.assertType("InPort")
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# Declare the new "in_msg_ptr" variable
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mtid = msg_type.ident
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qcode = self.queue_name.var.code
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code('''
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{
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const $mtid* in_msg_ptr;
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in_msg_ptr = dynamic_cast<const $mtid *>(($qcode).${{self.method}}());
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assert(in_msg_ptr != NULL);
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''')
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# The other statements
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self.statements.generate(code, return_type)
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self.symtab.popFrame()
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code("}")
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def findResources(self, resources):
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self.statements.findResources(resources)
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