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.. SPDX-License-Identifier: CC-BY-SA-4.0
.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
Classic API Configuration
=========================
This section defines the Classic API related system configuration parameters
supported by ``<rtems/confdefs.h>``.
.. index:: CONFIGURE_MAXIMUM_BARRIERS
.. _CONFIGURE_MAXIMUM_BARRIERS:
CONFIGURE_MAXIMUM_BARRIERS
--------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_BARRIERS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_BARRIERS`` is the maximum number of Classic API
Barriers that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
.. index:: CONFIGURE_MAXIMUM_MESSAGE_QUEUES
.. _CONFIGURE_MAXIMUM_MESSAGE_QUEUES:
CONFIGURE_MAXIMUM_MESSAGE_QUEUES
--------------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_MESSAGE_QUEUES``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_MESSAGE_QUEUES`` is the maximum number of Classic API
Message Queues that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode. You have
to account for the memory used to store the messages of each message queue,
see :ref:`CONFIGURE_MESSAGE_BUFFER_MEMORY`.
.. index:: CONFIGURE_MAXIMUM_PARTITIONS
.. _CONFIGURE_MAXIMUM_PARTITIONS:
CONFIGURE_MAXIMUM_PARTITIONS
----------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_PARTITIONS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_PARTITIONS`` is the maximum number of Classic API
Partitions that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
.. index:: CONFIGURE_MAXIMUM_PERIODS
.. _CONFIGURE_MAXIMUM_PERIODS:
CONFIGURE_MAXIMUM_PERIODS
-------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_PERIODS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_PERIODS`` is the maximum number of Classic API Periods
that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
.. index:: CONFIGURE_MAXIMUM_PORTS
.. _CONFIGURE_MAXIMUM_PORTS:
CONFIGURE_MAXIMUM_PORTS
-----------------------
CONSTANT:
``CONFIGURE_MAXIMUM_PORTS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_PORTS`` is the maximum number of Classic API Ports that
can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
.. index:: CONFIGURE_MAXIMUM_REGIONS
.. _CONFIGURE_MAXIMUM_REGIONS:
CONFIGURE_MAXIMUM_REGIONS
-------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_REGIONS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_REGIONS`` is the maximum number of Classic API Regions
that can be concurrently active.
NOTES:
None.
.. index:: CONFIGURE_MAXIMUM_SEMAPHORES
.. _CONFIGURE_MAXIMUM_SEMAPHORES:
CONFIGURE_MAXIMUM_SEMAPHORES
----------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_SEMAPHORES``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_SEMAPHORES`` is the maximum number of Classic API
Semaphores that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
In SMP configurations, the size of a Semaphore Control Block depends on the
scheduler count (see :ref:`ConfigurationSchedulerTable`). The semaphores
using the :ref:`MrsP` need a ceiling priority per scheduler.
.. index:: CONFIGURE_MAXIMUM_TASKS
.. _CONFIGURE_MAXIMUM_TASKS:
CONFIGURE_MAXIMUM_TASKS
-----------------------
CONSTANT:
``CONFIGURE_MAXIMUM_TASKS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is ``0``.
DESCRIPTION:
``CONFIGURE_MAXIMUM_TASKS`` is the maximum number of Classic API Tasks that
can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
The calculations for the required memory in the RTEMS Workspace for tasks
assume that each task has a minimum stack size and has floating point
support enabled. The configuration parameter
``CONFIGURE_EXTRA_TASK_STACKS`` is used to specify task stack requirements
*ABOVE* the minimum size required. See :ref:`Reserve Task/Thread Stack
Memory Above Minimum` for more information about
``CONFIGURE_EXTRA_TASK_STACKS``.
The maximum number of POSIX threads is specified by
:ref:`CONFIGURE_MAXIMUM_POSIX_THREADS <CONFIGURE_MAXIMUM_POSIX_THREADS>`.
A future enhancement to ``<rtems/confdefs.h>`` could be to eliminate the
assumption that all tasks have floating point enabled. This would require
the addition of a new configuration parameter to specify the number of
tasks which enable floating point support.
.. index:: CONFIGURE_MAXIMUM_TIMERS
.. _CONFIGURE_MAXIMUM_TIMERS:
CONFIGURE_MAXIMUM_TIMERS
------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_TIMERS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_TIMERS`` is the maximum number of Classic API Timers
that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
.. index:: CONFIGURE_MAXIMUM_USER_EXTENSIONS
.. _CONFIGURE_MAXIMUM_USER_EXTENSIONS:
CONFIGURE_MAXIMUM_USER_EXTENSIONS
---------------------------------
CONSTANT:
``CONFIGURE_MAXIMUM_USER_EXTENSIONS``
DATA TYPE:
Unsigned integer (``uint32_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 0.
DESCRIPTION:
``CONFIGURE_MAXIMUM_USER_EXTENSIONS`` is the maximum number of Classic API
User Extensions that can be concurrently active.
NOTES:
This object class can be configured in unlimited allocation mode.
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