AMiRo-OS

/'

µRtWare is a lightweight publish/subscribe middleware for real-time

applications. It was developed as part of the software habitat for the

Autonomous Mini Robot [1] (AMiRo) but can be used for other purposes as well.

Copyright (C) 2018..2020  Thomas Schöpping et al.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.

'/

/'### INTRO ##################################################################'/

@startuml

title **µRtWare**

!include ./functions.iuml

/'### ENTITIES ###############################################################'/

!startsub ENTITIES

/' uRtWare core structure. '/

$structure("urt_core_t") {

    'List of nodes ordered by their (initial) priority.

  - {field} {static} _nodes : urt_node_t*

    'Event source for control events.

  - {field} {static} _evtSource : urt_osEventSource_t

    'Mutex used for synchronization.

  - {field} {static} _lock : urt_osMutex_t

    'System execution/health status.

  - {field} {static} _status : urt_status_t

  .. URT_CFG_PUBSUB_ENABLED == true ..

    'List of topics ordered by their identifiers.

  - {field} {static} _topics : urt_topic_t*

  .. URT_CFG_RPC_ENABLED == true ..

    'List of services ordered by their identifiers.

  - {field} {static} _services : urt_service_t*

  __

    'Initializes the urt_core_t object.

  + {method} urtCoreInit (void) : void

    'Retrieves the current system status.

  + {method} urtCoreGetStatus (void) : urt_status_t

    'Starts all node threads (nodes will block before the loop).

  + {method} urtCoreStartNodes (void) : void

    'Nodes can use this function to synchronize.

  + {method} urtCoreSynchronize (node : urt_node_t*) : urt_status_t

    'Stops all nodes and propagates a specified reason.

  + {method} urtCoreStopNodes (reason : urt_status_t) : urt_status_t

  .. URT_CFG_PUBSUB_ENABLED == true ..

    'Retrieves a topic given an identifier.

  + {method} urtCoreGetTopic (id : urt_topicid_t) : urt_topic_t*

  .. URT_CFG_RPC_ENABLED == true ..

    'Retrieves a service given an identifier.

  + {method} urtCoreGetService (id : urt_serviceid_t) : urt_service_t*

}

$group("node") {

  /' Function type to be called during setup phase of node threads. '/

  $type("urt_nodeSetupCallback_t") {

      'Takes the node and optional parameters as arguments and returns a event mask for the next iteration.

    urt_nodeSetupCallback_t (node : urt_node_t*, arg : void*) : urt_osEventMask_t

  }

  /' Function type to be called during loop phase of node threads. '/

  $type("urt_nodeLoopCallback_t") {

      'Takes the node, a mask of occurred events and optional parameters as arguments and returns a event mask for the next iteration.

    urt_nodeLoopCallback_t (node : urt_node_t*, events : urt_osEventMask_t, arg : void*) : urt_osEventMask_t

  }

  /' Function type to be called during shutdown phase of node threads. '/

  $type("urt_nodeShutdownCallback_t") {

      'Takes the node, an error code defining the cause of the shutdown and optional parameters as argumnets.

    urt_nodeShutdownCallback_t (node : urt_node_t*, cause : urt_status_t, arg : void*) : void

  }

  /' Node structure. '/

  $structure("urt_node_t") {

      'Pointer to the next node in a list.

    + {field} next : urt_node_t*

      'Pointer to the node thread.

    + {field} thread : urt_osThread_t*

      'Optional callback function to be called during the setup phase.

    + {field} setupcallback : urt_nodeSetupCallback_t*

      'Optional parameters for the setup callback function.

    + {field} setupparams : void*

      'Callback function to be called in each loop iteration.

    + {field} loopcallback : urt_nodeLoopCallback_t*

      'Optional parameters for the loop callback function.

    + {field} loopparams : void*

      'Optional callback function to be called during the shutdown phase.

    + {field} shutdowncallback : urt_nodeShutdownCallback_t*

      'Optional parameters for the shutdown callback function.

    + {field} shutdownparams : void*

      'Execution stage of the node.

    + {field} stage : urt_nodestage_t

      'Event listener for middleware-wide control events.

    + {field} listener : urt_osEventListener_t

    .. URT_CFG_PUBSUB_PROFILING == true || URT_CFG_RPC_PROFILING = true ..

      'Counter of executed loops.

    + {field} loops : uint64_t

    __

    'The main() function of the node thread.

    - {method} {static} _main : urt_osThreadFunction_t

      'Initializes an urt_node_t object.

    + {method} urtNodeInit (node : urt_node_t*, thread : urt_osThread_t*, setupcallback : urt_nodeSetupCallback_t*, setupparams : void*, loopcallback : urt_nodeLoopCallback_t*, loopparams : void*, shutdowncallback : urt_nodeShutdownCallback_t*, shutodwnparams : void*) : void

  }

} /'node'/

$module("Publish-Subscribe System") {

  !includesub pubsub.uml!ENTITIES

}

$module("Remote Procedure Call System") {

  !includesub rpc.uml!ENTITIES

}

!endsub

/'### DEPENDENCIES & LAYOUT ##################################################'/

!startsub DEPENDENCIES

urt_node_t "1" o-- "0..1" urt_node_t

urt_node_t "1" o-- "0..1" urt_nodeSetupCallback_t

urt_node_t <.. urt_nodeSetupCallback_t

urt_node_t "1" o-- "1" urt_nodeLoopCallback_t

urt_node_t <.. urt_nodeLoopCallback_t

urt_node_t "1" o-- "0..1" urt_nodeShutdownCallback_t

urt_node_t <.. urt_nodeShutdownCallback_t

!includesub pubsub.uml!DEPENDENCIES

!includesub rpc.uml!DEPENDENCIES

urt_core_t "1" o-- "0..1" urt_node_t

urt_core_t "1" *-- "0..1" urt_topic_t

urt_core_t "1" *-- "0..1" urt_service_t

!endsub

/'### OUTRO ##################################################################'/

@enduml