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ReStructuredText
444 lines
13 KiB
ReStructuredText
.. 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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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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.. This file was automatically generated. Do not edit it manually.
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.. Please have a look at
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..
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.. https://docs.rtems.org/branches/master/eng/req/howto.html
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..
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.. for information how to maintain and re-generate this file.
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Classic API Configuration
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=========================
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This section describes configuration options related to the Classic API.
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.. index:: CONFIGURE_MAXIMUM_BARRIERS
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.. _CONFIGURE_MAXIMUM_BARRIERS:
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CONFIGURE_MAXIMUM_BARRIERS
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--------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_BARRIERS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Barriers that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_MESSAGE_QUEUES
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.. _CONFIGURE_MAXIMUM_MESSAGE_QUEUES:
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CONFIGURE_MAXIMUM_MESSAGE_QUEUES
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--------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_MESSAGE_QUEUES``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Message Queues that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`. You have to account for the memory used to
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store the messages of each message queue, see
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:ref:`CONFIGURE_MESSAGE_BUFFER_MEMORY`.
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.. index:: CONFIGURE_MAXIMUM_PARTITIONS
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.. _CONFIGURE_MAXIMUM_PARTITIONS:
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CONFIGURE_MAXIMUM_PARTITIONS
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PARTITIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Partitions that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_PERIODS
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.. _CONFIGURE_MAXIMUM_PERIODS:
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CONFIGURE_MAXIMUM_PERIODS
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-------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PERIODS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Periods that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_PORTS
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.. _CONFIGURE_MAXIMUM_PORTS:
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CONFIGURE_MAXIMUM_PORTS
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-----------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_PORTS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Ports that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_REGIONS
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.. _CONFIGURE_MAXIMUM_REGIONS:
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CONFIGURE_MAXIMUM_REGIONS
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-------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_REGIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Regions that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_SEMAPHORES
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.. _CONFIGURE_MAXIMUM_SEMAPHORES:
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CONFIGURE_MAXIMUM_SEMAPHORES
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_SEMAPHORES``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Semaphore that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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In SMP configurations, the size of a Semaphore Control Block depends on the
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scheduler count (see :ref:`ConfigurationSchedulerTable`). The semaphores
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using the :ref:`MrsP` need a ceiling priority per scheduler.
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.. index:: CONFIGURE_MAXIMUM_TASKS
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.. _CONFIGURE_MAXIMUM_TASKS:
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CONFIGURE_MAXIMUM_TASKS
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-----------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_TASKS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It shall be small enough so that the task
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stack space calculation carried out by ``<rtems/confdefs.h>`` does not
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overflow an integer of type `uintptr_t <https://en.cppreference.com/w/c/types/integer>`_.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Tasks that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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The calculations for the required memory in the RTEMS Workspace for tasks
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assume that each task has a minimum stack size and has floating point
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support enabled. The configuration option :ref:`CONFIGURE_EXTRA_TASK_STACKS` is used
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to specify task stack requirements *above* the minimum size required.
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The maximum number of POSIX threads is specified by
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:ref:`CONFIGURE_MAXIMUM_POSIX_THREADS`.
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A future enhancement to ``<rtems/confdefs.h>`` could be to eliminate the
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assumption that all tasks have floating point enabled. This would require
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the addition of a new configuration parameter to specify the number of
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tasks which enable floating point support.
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.. index:: CONFIGURE_MAXIMUM_TIMERS
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.. _CONFIGURE_MAXIMUM_TIMERS:
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CONFIGURE_MAXIMUM_TIMERS
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------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_TIMERS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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* It may be defined through
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:c:func:`rtems_resource_unlimited` the enable unlimited objects for this
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object class, if the value passed to :c:func:`rtems_resource_unlimited`
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satisfies all other constraints of this configuration option.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API Timers that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode, see
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:ref:`ConfigUnlimitedObjects`.
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.. index:: CONFIGURE_MAXIMUM_USER_EXTENSIONS
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.. _CONFIGURE_MAXIMUM_USER_EXTENSIONS:
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CONFIGURE_MAXIMUM_USER_EXTENSIONS
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---------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_USER_EXTENSIONS``
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OPTION TYPE:
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This configuration option is an integer define.
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DEFAULT VALUE:
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The default value is 0.
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VALUE CONSTRAINTS:
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The value of this configuration option shall satisfy all of the following
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constraints:
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* It shall be greater than or equal to 0.
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* It shall be less than or equal to 65535.
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* It shall be less than or equal to a
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BSP-specific and application-specific value which depends on the size of the
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memory available to the application.
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DESCRIPTION:
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The value of this configuration option defines the maximum number of Classic
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API User Extensions that can be concurrently active.
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NOTES:
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This object class cannot be configured in unlimited allocation mode.
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