get_arg.h
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00001 // -*- C++ -*- 00002 00003 //============================================================================= 00004 /** 00005 * @file get_arg.h 00006 * 00007 * $Id: get_arg.h 88803 2010-02-02 11:13:27Z vzykov $ 00008 * 00009 * Thru-POA/skeleton argument selection function templates. 00010 * @par 00011 * These function templates are used to choose between arguments 00012 * supplied in thru-POA collocated invocations and arguments in 00013 * uncollocated invocations. 00014 * 00015 * @note A function template approach is used to avoid complicated 00016 * argument conversions between stub supplied arguments and 00017 * skeleton supplied ones. For example, it is possible to make 00018 * argument selection more transparent by taking advantage of 00019 * run-time polymorphism. However, that approach would incur 00020 * additional footprint overhead on the client side due to the 00021 * introduction of virtual tables, etc. 00022 * 00023 * @author Ossama Othman 00024 */ 00025 //============================================================================= 00026 00027 #ifndef TAO_GET_ARG_H 00028 #define TAO_GET_ARG_H 00029 00030 #include /**/ "ace/pre.h" 00031 00032 #include "tao/PortableServer/SArg_Traits_T.h" 00033 #include "tao/operation_details.h" 00034 00035 TAO_BEGIN_VERSIONED_NAMESPACE_DECL 00036 00037 namespace TAO 00038 { 00039 namespace Portable_Server 00040 { 00041 /// Get return value/argument. 00042 template<typename T> 00043 typename TAO::SArg_Traits<T>::ret_arg_type 00044 get_ret_arg (TAO_Operation_Details const * details, 00045 TAO::Argument * const * skel_args) 00046 { 00047 return 00048 (details != 0 && details->use_stub_args ()) 00049 ? static_cast<typename TAO::Arg_Traits<T>::ret_val *> ( 00050 details->args ()[0])->arg () 00051 : static_cast<typename TAO::SArg_Traits<T>::ret_val *> ( 00052 skel_args[0])->arg (); 00053 } 00054 00055 /// Get "in" argument. 00056 template<typename T> 00057 typename TAO::SArg_Traits<T>::in_arg_type 00058 get_in_arg (TAO_Operation_Details const * details, 00059 TAO::Argument * const * skel_args, 00060 size_t i) 00061 { 00062 return 00063 (details != 0 && details->use_stub_args ()) 00064 ? static_cast<typename TAO::Arg_Traits<T>::in_arg_val *> ( 00065 details->args ()[i])->arg () 00066 : static_cast<typename TAO::SArg_Traits<T>::in_arg_val *> ( 00067 skel_args[i])->arg (); 00068 } 00069 00070 /// Get "inout" argument. 00071 template<typename T> 00072 typename TAO::SArg_Traits<T>::inout_arg_type 00073 get_inout_arg (TAO_Operation_Details const * details, 00074 TAO::Argument * const * skel_args, 00075 size_t i) 00076 { 00077 return 00078 (details != 0 && details->use_stub_args ()) 00079 ? static_cast<typename TAO::Arg_Traits<T>::inout_arg_val *> ( 00080 details->args ()[i])->arg () 00081 : static_cast<typename TAO::SArg_Traits<T>::inout_arg_val *> ( 00082 skel_args[i])->arg (); 00083 } 00084 00085 /// Get "out" argument. 00086 template<typename T> 00087 typename TAO::SArg_Traits<T>::out_arg_type 00088 get_out_arg (TAO_Operation_Details const * details, 00089 TAO::Argument * const * skel_args, 00090 size_t i) 00091 { 00092 return 00093 (details != 0 && details->use_stub_args ()) 00094 ? static_cast<typename TAO::Arg_Traits<T>::out_arg_val *> ( 00095 details->args ()[i])->arg () 00096 : static_cast<typename TAO::SArg_Traits<T>::out_arg_val *> ( 00097 skel_args[i])->arg (); 00098 } 00099 } 00100 } 00101 00102 TAO_END_VERSIONED_NAMESPACE_DECL 00103 00104 #include /**/ "ace/post.h" 00105 00106 #endif /* TAO_GET_ARG_H*/
