smart_proxy_cs.cpp

来自「这是广泛使用的通信开源项目,对于大容量,高并发的通讯要求完全能够胜任,他广泛可用」· C++ 代码 · 共 173 行

//
// smart_proxy_cs.cpp,v 1.7 2003/03/12 16:50:34 parsons Exp
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    operation_smart_proxy_cs.cpp
//
// = DESCRIPTION
//    Visitor generating code for Operation in the stubs file.
//
// = AUTHOR
//    Kirthika Parameswaran <[e-mail]>
//
// ============================================================================

ACE_RCSID (be_visitor_operation, 
           operation_smart_proxy_cs, 
           "smart_proxy_cs.cpp,v 1.7 2003/03/12 16:50:34 parsons Exp")

// ************************************************************
// Operation visitor for client stubs
// ************************************************************

be_visitor_operation_smart_proxy_cs::be_visitor_operation_smart_proxy_cs (
    be_visitor_context *ctx
  )
  : be_visitor_operation (ctx)
{
}

be_visitor_operation_smart_proxy_cs::~be_visitor_operation_smart_proxy_cs (
    void
  )
{
}

int be_visitor_operation_smart_proxy_cs::visit_operation (be_operation *node)
{
  if (be_global->gen_smart_proxies ())
    {
      TAO_OutStream *os = this->ctx_->stream ();

      // We need the interface node in which this operation was defined. However,
      // if this operation node was an attribute node in disguise, we get this
      // information from the context.
      be_interface *intf = this->ctx_->attribute ()
        ? be_interface::narrow_from_scope (this->ctx_->attribute ()->defined_in ())
        : be_interface::narrow_from_scope (node->defined_in ());

      if (!intf)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_operation_smart_proxy_cs::"
                             "visit_operation - "
                             "bad interface scope\n"),
                            -1);
        }

      be_type *bt = be_type::narrow_from_decl (node->return_type ());

      if (!bt)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_operation_smart_proxy_cs::"
                             "visit_operation - "
                             "Bad return type\n"),
                            -1);
        }

      // STEP 2: generate the return type mapping (same as in the header file).
      be_visitor_context ctx (*this->ctx_);
      be_visitor_operation_rettype oro_visitor (&ctx);

      if (bt->accept (&oro_visitor) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_operation_smart_proxy_cs::"
                             "visit_operation - "
                             "codegen for return type failed\n"),
                            -1);
        }

      // Its necessary to take care of the nested case. The smart proxy classes
      // are in the same scope as the proxy (i.e. interface) but here the
      // node (i.e the operation) is already in a scope lower than intf
      // (i.e. be_interface), so for deciding the exact scope use intf.

      be_decl* scope = be_scope::narrow_from_scope (intf->defined_in ())->decl ();

      *os << " ";
      *os << scope->full_name ();

      // Only if there exists any nesting "::" is needed!
      if (intf->is_nested ())
        *os << "::";

      *os << "TAO_" << intf->flat_name () <<"_Smart_Proxy_Base::";
      *os << node->local_name () << " ";

      // STEP 4: generate the argument list with the appropriate mapping (same as
      // in the header file)
      ctx = *this->ctx_;
      be_visitor_operation_arglist oao_visitor (&ctx);

      if (node->accept (&oao_visitor) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_operation_ss::"
                             "visit_operation - "
                             "codegen for argument list failed\n"),
                            -1);
        }

      *os << "{" << be_idt << "\n";

      os->indent ();

      // Simply make the call and leave everything to the layer
      // above, i.e. the client code.
      if (!this->void_return_type (bt))
        {
          *os << "return ";
        }

      *os << "this->get_proxy ()";

      if (this->gen_invoke (ctx, node) == -1)
        return -1;

      *os << be_uidt_nl
          << "}\n\n";
    }
  else
    {
      ACE_UNUSED_ARG (node);
    }

  return 0;
}

int be_visitor_operation_smart_proxy_cs::gen_invoke (be_visitor_context &ctx,
                                                     be_operation *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  *os << "->" << node->local_name () << " ("
      << be_idt << be_idt << "\n";

  ctx = *this->ctx_;
  ctx.state (TAO_CodeGen::TAO_OPERATION_COLLOCATED_ARG_UPCALL_SS);
  be_visitor_operation_argument visitor (&ctx);

  if (node->accept (&visitor) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_operation_smart_proxy_cs::"
                         "gen_invoke - "
                         "codegen for making upcall failed\n"),
                        -1);
    }

  *os << be_uidt_nl
      << ");\n" << be_uidt;

  return 0;
}