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-rw-r--r-- | c-user/glossary.rst | 40 |
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diff --git a/c-user/glossary.rst b/c-user/glossary.rst index 71a0242..16ddcef 100644 --- a/c-user/glossary.rst +++ b/c-user/glossary.rst @@ -233,6 +233,12 @@ Glossary A term used to describe memory which can be accessed at two different addresses. + dynamic extension sets + The dynamic extension sets are a list of :term:`user extensions`. The list + is defined by the system services used by the application and directive calls + such as :c:func:`rtems_extension_create`. See also + :term:`initial extension sets`. + EARS This term is an acronym for Easy Approach to Requirements Syntax. @@ -286,6 +292,26 @@ Glossary An object known by all nodes in a multiprocessor system. An object created with the GLOBAL attribute will be exported. + extension forward order + The :term:`user extensions` may be invoked in extension forward order. In + forward order, all user extensions of the :term:`initial extension sets` are + invoked before all user extensions of the :term:`dynamic extension sets`. + In the initial extension sets the order is defined by the table index. The + user extension with the lowest table index is invoked first. In the dynamic + extension sets the order is defined by the registration order. The first + registered user extension is invoked first. See also + :term:`extension reverse order`. + + extension reverse order + The :term:`user extensions` may be invoked in extension reverse order. In + reverse order, all user extensions of the :term:`dynamic extension sets` are + invoked before all user extensions of the :term:`initial extension sets`. + In the dynamic extension sets the order is defined by the registration order. + The last registered user extension is invoked first. In the initial + extension sets the order is defined by the table index. The user extension + with the highest table index is invoked first. See also + :term:`extension forward order`. + external address The address used to access dual-ported memory by all the nodes in a system which do not own the memory. @@ -371,6 +397,13 @@ Glossary An ineligible scheduler of a :term:`task` is a :term:`scheduler` which is not an :term:`eligible scheduler`. + initial extension sets + The initial extension sets are a table of :term:`user extensions`. The table + is defined by the application configuration for example through the + :ref:`CONFIGURE_INITIAL_EXTENSIONS` application configuration option. The + initial extension sets cannot be altered during runtime through directive + calls. See also :term:`dynamic extension sets`. + interface A specification of the methodology used to connect multiple independent subsystems. @@ -991,8 +1024,11 @@ Glossary A table which contains the entry points for each user extensions. user extensions - Software routines provided by the application to enhance the - functionality of RTEMS. + User extensions are software routines provided by the application to enhance + the functionality of RTEMS. An active user extension is either in the + :term:`initial extension sets` or the :term:`dynamic extension sets`. User + extensions are invoked in :term:`extension forward order` or + :term:`extension reverse order`. User Initialization Tasks Table A table which contains the information needed to create and start each of |