/doc/activitydiagrams/request/functions.iuml - Annotate - AMiRo-OS - Research for Cognitive Interaction

2d315870

Thomas Schöpping

/'

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

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

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

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

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

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

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

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(at your option) any later version.

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

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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GNU General Public License for more details.

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

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

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'/

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/' Acquire a request (blocking). '/

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!function $acquire_request()

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  start

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  :lock request;

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  note

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    Execution is blocked until mutex is locked.

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  endnote

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  if (Request is owned by a service?) then (yes)

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    :unlock request;

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    stop

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    note

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      Returns ""URT_STATUS_REQUEST_BADOWNER"".

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    endnote

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  else (no)

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    stop

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    note

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      Returns ""URT_STATUS_OK"".

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    endnote

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  endif

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!endfunction

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/' Try to acquire a request (non blocking). '/

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!function $try_acquire_request()

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  start

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  :lock request;

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  note

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    Does not block.

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  endnote

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  if (Request could be locked?) then (yes)

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    if (Request is owned by a service?) then (yes)

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      :unlock request;

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      stop

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      note

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        Returns ""URT_STATUS_REQUEST_BADOWNER"".

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      endnote

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    else (no)

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      stop

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      note

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        Returns ""URT_STATUS_OK"".

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      endnote

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    endif

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  else (no)

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    stop

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    note

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      Returns ""URT_STATUS_REQUEST_LOCKED"".

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    endnote

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  endif

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!endfunction

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/' Release a previously acquired request. '/

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!function $release_request()

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  start

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  :unlock request;

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  stop

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  note

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    Returns ""URT_STATUS_OK"".

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  endnote

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!endfunction

AMiRo-OS

urtware / doc / activitydiagrams / request / functions.iuml @ 5b7188aa