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.. SPDX-License-Identifier: CC-BY-SA-4.0
.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
POSIX Initialization Thread Configuration
=========================================
The ``<rtems/confdefs.h>`` configuration system can automatically generate a
POSIX Initialization Threads Table named ``POSIX_Initialization_threads`` with
a single entry. The following parameters control the generation of that table.
.. index:: CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT
.. _CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT:
CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT
---------------------------------------
CONSTANT:
``CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT``
DATA TYPE:
POSIX thread function pointer (``void *(*entry_point)(void *)``).
RANGE:
Undefined or a valid POSIX thread function pointer.
DEFAULT VALUE:
The default value is ``POSIX_Init``.
DESCRIPTION:
``CONFIGURE_POSIX_INIT_THREAD_ENTRY_POINT`` is the entry point
(a.k.a. function name) of the single initialization thread defined by the
POSIX API Initialization Threads Table.
NOTES:
The user must implement the function ``POSIX_Init`` or the function name
provided in this configuration parameter.
.. index:: CONFIGURE_POSIX_INIT_THREAD_STACK_SIZE
.. _CONFIGURE_POSIX_INIT_THREAD_STACK_SIZE:
CONFIGURE_POSIX_INIT_THREAD_STACK_SIZE
--------------------------------------
CONSTANT:
``CONFIGURE_POSIX_INIT_THREAD_STACK_SIZE``
DATA TYPE:
Unsigned integer (``size_t``).
RANGE:
Zero or positive.
DEFAULT VALUE:
The default value is 2 \* RTEMS_MINIMUM_STACK_SIZE.
DESCRIPTION:
``CONFIGURE_POSIX_INIT_THREAD_STACK_SIZE`` is the stack size of the single
initialization thread defined by the POSIX API Initialization Threads
Table.
NOTES:
If the stack size specified is greater than the configured minimum, it must
be accounted for in ``CONFIGURE_EXTRA_TASK_STACKS``. See :ref:`Reserve
Task/Thread Stack Memory Above Minimum` for more information about
``CONFIGURE_EXTRA_TASK_STACKS``.
.. index:: CONFIGURE_POSIX_INIT_THREAD_TABLE
.. _CONFIGURE_POSIX_INIT_THREAD_TABLE:
CONFIGURE_POSIX_INIT_THREAD_TABLE
---------------------------------
CONSTANT:
``CONFIGURE_POSIX_INIT_THREAD_TABLE``
DATA TYPE:
Boolean feature macro.
RANGE:
Defined or undefined.
DEFAULT VALUE:
This field is not defined by default, as the user MUST select their own API
for initialization tasks.
DESCRIPTION:
``CONFIGURE_POSIX_INIT_THREAD_TABLE`` is defined if the user wishes to use
a POSIX API Initialization Threads Table. The table built by
``<rtems/confdefs.h>`` specifies the parameters for a single thread. This
is sufficient for applications which initialization the system from a
single task.
By default, this field is not defined as the user MUST select their own API
for initialization tasks.
NOTES:
The application may choose to use the initialization tasks or threads table
from another API.
A compile time error will be generated if the user does not configure any
initialization tasks or threads.
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