.. _program_listing_file_include_rosidl_runtime_c_message_type_support_struct.h:

Program Listing for File message_type_support_struct.h
======================================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_rosidl_runtime_c_message_type_support_struct.h>` (``include/rosidl_runtime_c/message_type_support_struct.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2015-2016 Open Source Robotics Foundation, Inc.
   //
   // Licensed under the Apache License, Version 2.0 (the "License");
   // you may not use this file except in compliance with the License.
   // You may obtain a copy of the License at
   //
   //     http://www.apache.org/licenses/LICENSE-2.0
   //
   // Unless required by applicable law or agreed to in writing, software
   // distributed under the License is distributed on an "AS IS" BASIS,
   // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   // See the License for the specific language governing permissions and
   // limitations under the License.
   
   #ifndef ROSIDL_RUNTIME_C__MESSAGE_TYPE_SUPPORT_STRUCT_H_
   #define ROSIDL_RUNTIME_C__MESSAGE_TYPE_SUPPORT_STRUCT_H_
   
   #include "rosidl_runtime_c/type_description/type_description__struct.h"
   #include "rosidl_runtime_c/type_description/type_source__struct.h"
   #include "rosidl_runtime_c/type_hash.h"
   #include "rosidl_runtime_c/visibility_control.h"
   #include "rosidl_typesupport_interface/macros.h"
   
   #ifdef __cplusplus
   extern "C"
   {
   #endif
   
   typedef struct rosidl_message_type_support_t rosidl_message_type_support_t;
   
   typedef const rosidl_message_type_support_t * (* rosidl_message_typesupport_handle_function)(
     const rosidl_message_type_support_t *, const char *);
   
   typedef const rosidl_type_hash_t *
   (* rosidl_message_get_type_hash_function)(const rosidl_message_type_support_t *);
   
   typedef const rosidl_runtime_c__type_description__TypeDescription *
   (* rosidl_message_get_type_description_function)(const rosidl_message_type_support_t *);
   
   typedef const rosidl_runtime_c__type_description__TypeSource__Sequence *
   (* rosidl_message_get_type_description_sources_function)(const rosidl_message_type_support_t *);
   
   struct rosidl_message_type_support_t
   {
     const char * typesupport_identifier;
     const void * data;
     rosidl_message_typesupport_handle_function func;
     rosidl_message_get_type_hash_function get_type_hash_func;
     rosidl_message_get_type_description_function get_type_description_func;
     rosidl_message_get_type_description_sources_function get_type_description_sources_func;
   };
   
   ROSIDL_GENERATOR_C_PUBLIC
   rosidl_message_type_support_t rosidl_get_zero_initialized_message_type_support_handle(void);
   
   
   ROSIDL_GENERATOR_C_PUBLIC
   const rosidl_message_type_support_t * get_message_typesupport_handle(
     const rosidl_message_type_support_t * handle, const char * identifier);
   
   // Get the message type support handle function specific to this identifier.
   ROSIDL_GENERATOR_C_PUBLIC
   const rosidl_message_type_support_t * get_message_typesupport_handle_function(
     const rosidl_message_type_support_t * handle, const char * identifier);
   
   /*
    * \param PkgName Name of the package that contains the message
    * \param MsgSubfolder name of the subfolder (for example: msg)
    * \param MsgName message name
    * \return a rosidl_message_type_support_t struct if founded, otherwise NULL.
    */
   #define ROSIDL_GET_MSG_TYPE_SUPPORT(PkgName, MsgSubfolder, MsgName) \
     ROSIDL_TYPESUPPORT_INTERFACE__MESSAGE_SYMBOL_NAME( \
       rosidl_typesupport_c, PkgName, MsgSubfolder, MsgName)()
   
   #ifdef __cplusplus
   }
   #endif
   
   #endif  // ROSIDL_RUNTIME_C__MESSAGE_TYPE_SUPPORT_STRUCT_H_