mirror of
https://git.rtems.org/rtems-docs/
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c-user: Split up user extensions manager
This makes it easier to automatically generate parts of the manager documentation in the future. Update #3993.
This commit is contained in:
Sebastian Huber
parent
a99bbaec5f
commit
80df4d6a47
@ -46,7 +46,7 @@ RTEMS Classic API Guide (|version|).
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io/index
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fatal_error
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board_support_packages
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user_extensions
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user-extensions/index
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config/index
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self_contained_objects
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multiprocessing
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@ -2,27 +2,6 @@
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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.. index:: user extensions
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.. _User Extensions Manager:
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User Extensions Manager
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***********************
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Introduction
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============
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The user extensions manager allows the application developer to augment the
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executive by allowing them to supply extension routines which are invoked at
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critical system events. The directives provided by the user extensions manager
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are:
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- rtems_extension_create_ - Create an extension set
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- rtems_extension_ident_ - Get ID of an extension set
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- rtems_extension_delete_ - Delete an extension set
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Background
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==========
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@ -431,143 +410,3 @@ It is strongly advised to use initial extension sets to install a fatal error
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extension. Usually, the initial extension set of board support package
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provides a fatal error extension which resets the board. In this case, the
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dynamic fatal error extensions are not invoked.
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Directives
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==========
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This section details the user extension manager's directives. A subsection is
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dedicated to each of this manager's directives and describes the calling
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sequence, related constants, usage, and status codes.
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.. raw:: latex
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\clearpage
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.. index:: create an extension set
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.. index:: rtems_extension_create
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.. _rtems_extension_create:
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EXTENSION_CREATE - Create a extension set
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-----------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_create(
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rtems_name name,
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const rtems_extensions_table *table,
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rtems_id *id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set created successfully
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* - ``RTEMS_INVALID_ADDRESS``
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- ``table`` or ``id`` are NULL
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* - ``RTEMS_INVALID_NAME``
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- invalid extension set name
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* - ``RTEMS_TOO_MANY``
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- too many extension sets created
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DESCRIPTION:
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This directive creates an extension set object and initializes it using the
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specified extension set table. The assigned extension set identifier is
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returned in :c:data:`id`. This identifier is used to access the extension
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set with other user extension manager directives. For control and
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maintenance of the extension set, RTEMS allocates an Extension Set Control
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Block (ESCB) from the local ESCB free pool and initializes it. The
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user-specified :c:data:`name` is assigned to the ESCB and may be used to
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identify the extension set via
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:ref:`rtems_extension_ident() <rtems_extension_ident>`. The extension set
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specified by :c:data:`table` is copied to the ESCB.
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NOTES:
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This directive may cause the calling task to be preempted due to an
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obtain and release of the object allocator mutex.
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.. raw:: latex
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\clearpage
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.. index:: get ID of an extension set
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.. index:: obtain ID of an extension set
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.. index:: rtems_extension_ident
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.. _rtems_extension_ident:
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EXTENSION_IDENT - Get ID of a extension set
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-------------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_ident(
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rtems_name name,
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rtems_id *id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set identified successfully
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* - ``RTEMS_INVALID_NAME``
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- extension set name not found
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DESCRIPTION:
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This directive obtains the extension set identifier associated with the
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extension set :c:data:`name` to be acquired and returns it in :c:data:`id`.
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If the extension set name is not unique, then the extension set identifier
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will match one of the extension sets with that name. However, this
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extension set identifier is not guaranteed to correspond to the desired
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extension set. The extension set identifier is used to access this
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extension set in other extension set related directives.
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NOTES:
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This directive will not cause the running task to be preempted.
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.. raw:: latex
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\clearpage
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.. index:: delete an extension set
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.. index:: rtems_extension_delete
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.. _rtems_extension_delete:
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EXTENSION_DELETE - Delete a extension set
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-----------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_delete(
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rtems_id id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set deleted successfully
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* - ``RTEMS_INVALID_ID``
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- invalid extension set id
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DESCRIPTION:
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This directive deletes the extension set specified by :c:data:`id`. If the
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extension set is running, it is automatically canceled. The ESCB for the
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deleted extension set is reclaimed by RTEMS.
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NOTES:
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This directive may cause the calling task to be preempted due to an
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obtain and release of the object allocator mutex.
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A extension set can be deleted by a task other than the task which created
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the extension set.
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143
c-user/user-extensions/directives.rst
Normal file
143
c-user/user-extensions/directives.rst
Normal file
@ -0,0 +1,143 @@
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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Directives
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==========
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This section details the user extension manager's directives. A subsection is
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dedicated to each of this manager's directives and describes the calling
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sequence, related constants, usage, and status codes.
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.. raw:: latex
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\clearpage
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.. index:: create an extension set
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.. index:: rtems_extension_create
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.. _rtems_extension_create:
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EXTENSION_CREATE - Create a extension set
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-----------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_create(
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rtems_name name,
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const rtems_extensions_table *table,
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rtems_id *id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set created successfully
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* - ``RTEMS_INVALID_ADDRESS``
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- ``table`` or ``id`` are NULL
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* - ``RTEMS_INVALID_NAME``
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- invalid extension set name
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* - ``RTEMS_TOO_MANY``
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- too many extension sets created
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DESCRIPTION:
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This directive creates an extension set object and initializes it using the
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specified extension set table. The assigned extension set identifier is
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returned in :c:data:`id`. This identifier is used to access the extension
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set with other user extension manager directives. For control and
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maintenance of the extension set, RTEMS allocates an Extension Set Control
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Block (ESCB) from the local ESCB free pool and initializes it. The
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user-specified :c:data:`name` is assigned to the ESCB and may be used to
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identify the extension set via
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:ref:`rtems_extension_ident() <rtems_extension_ident>`. The extension set
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specified by :c:data:`table` is copied to the ESCB.
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NOTES:
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This directive may cause the calling task to be preempted due to an
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obtain and release of the object allocator mutex.
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.. raw:: latex
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\clearpage
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.. index:: get ID of an extension set
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.. index:: obtain ID of an extension set
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.. index:: rtems_extension_ident
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.. _rtems_extension_ident:
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EXTENSION_IDENT - Get ID of a extension set
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-------------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_ident(
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rtems_name name,
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rtems_id *id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set identified successfully
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* - ``RTEMS_INVALID_NAME``
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- extension set name not found
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DESCRIPTION:
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This directive obtains the extension set identifier associated with the
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extension set :c:data:`name` to be acquired and returns it in :c:data:`id`.
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If the extension set name is not unique, then the extension set identifier
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will match one of the extension sets with that name. However, this
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extension set identifier is not guaranteed to correspond to the desired
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extension set. The extension set identifier is used to access this
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extension set in other extension set related directives.
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NOTES:
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This directive will not cause the running task to be preempted.
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.. raw:: latex
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\clearpage
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.. index:: delete an extension set
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.. index:: rtems_extension_delete
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.. _rtems_extension_delete:
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EXTENSION_DELETE - Delete a extension set
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-----------------------------------------
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CALLING SEQUENCE:
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.. code-block:: c
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rtems_status_code rtems_extension_delete(
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rtems_id id
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);
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DIRECTIVE STATUS CODES:
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.. list-table::
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:class: rtems-table
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* - ``RTEMS_SUCCESSFUL``
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- extension set deleted successfully
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* - ``RTEMS_INVALID_ID``
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- invalid extension set id
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DESCRIPTION:
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This directive deletes the extension set specified by :c:data:`id`. If the
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extension set is running, it is automatically canceled. The ESCB for the
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deleted extension set is reclaimed by RTEMS.
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NOTES:
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This directive may cause the calling task to be preempted due to an
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obtain and release of the object allocator mutex.
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A extension set can be deleted by a task other than the task which created
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the extension set.
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16
c-user/user-extensions/index.rst
Normal file
16
c-user/user-extensions/index.rst
Normal file
@ -0,0 +1,16 @@
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
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.. index:: user extensions
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.. _User Extensions Manager:
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User Extensions Manager
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***********************
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.. toctree::
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introduction
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background
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directives
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17
c-user/user-extensions/introduction.rst
Normal file
17
c-user/user-extensions/introduction.rst
Normal file
@ -0,0 +1,17 @@
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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Introduction
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============
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The user extensions manager allows the application developer to augment the
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executive by allowing them to supply extension routines which are invoked at
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critical system events. The directives provided by the user extensions manager
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are:
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- :ref:`rtems_extension_create`
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- :ref:`rtems_extension_ident`
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- :ref:`rtems_extension_delete`
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