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c-user: Update POSIX API configuration

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Close ##2514.
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Sebastian Huber 2018-10-30 08:09:15 +01:00
parent 5ca4172a4c
commit dd1c262d2a
1 changed files with 22 additions and 11 deletions
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c-user/configuring_a_system.rst
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@ -517,7 +517,7 @@ NOTES:
``CONFIGURE_EXTRA_TASK_STACKS``.
The maximum number of POSIX threads is specified by
``CONFIGURE_MAXIMUM_POSIX_THREADS``.
: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
@ -1051,9 +1051,10 @@ NOTES:
POSIX API Configuration
=======================
The parameters in this section are used to configure resources for the RTEMS
POSIX API. They are only relevant if the POSIX API is enabled at configure
time using the ``--enable-posix`` option.
The parameters in this section are used to configure resources for the POSIX
API supported by RTEMS. Most POSIX API objects are available by default since
RTEMS 5.1. The queued signals and timers are only available if RTEMS was built
with the ``--enable-posix`` build configuration option.
.. index:: CONFIGURE_MAXIMUM_POSIX_KEYS
@ -1163,7 +1164,10 @@ DESCRIPTION:
API Queued Signals that can be concurrently active.
NOTES:
None.
Unlimited objects are not available for queued signals.
Queued signals are only available if RTEMS was built with the
``--enable-posix`` build configuration option.
.. index:: CONFIGURE_MAXIMUM_POSIX_SEMAPHORES
@ -1186,13 +1190,14 @@ DEFAULT VALUE:
DESCRIPTION:
``CONFIGURE_MAXIMUM_POSIX_SEMAPHORES`` is the maximum number of POSIX API
Named Semaphores that can be concurrently active. Named semaphores are
created with ``sem_open()``. Semaphores initialized with ``sem_init()``
are not affected by this configuration option since the storage space for
these semaphores is user-provided.
Named Semaphores that can be concurrently active.
NOTES:
None.
This object class can be configured in unlimited allocation mode.
Named semaphores are created with ``sem_open()``. Semaphores initialized
with ``sem_init()`` are not affected by this configuration option since the
storage space for these semaphores is user-provided.
.. index:: CONFIGURE_MAXIMUM_POSIX_TIMERS
@ -1220,6 +1225,9 @@ DESCRIPTION:
NOTES:
This object class can be configured in unlimited allocation mode.
Timers are only available if RTEMS was built with the
``--enable-posix`` build configuration option.
.. index:: CONFIGURE_MAXIMUM_POSIX_THREADS
.. _CONFIGURE_MAXIMUM_POSIX_THREADS:
@ -1255,7 +1263,7 @@ NOTES:
``CONFIGURE_EXTRA_TASK_STACKS``.
The maximum number of Classic API Tasks is specified by
``CONFIGURE_MAXIMUM_TASKS``.
:ref:`CONFIGURE_MAXIMUM_TASKS <CONFIGURE_MAXIMUM_TASKS>`.
All POSIX threads have floating point enabled.
@ -1284,6 +1292,9 @@ DESCRIPTION:
This configuration parameter defines the minimum stack size in bytes for
every POSIX thread in the system.
NOTES:
None.
POSIX Initialization Threads Table Configuration
================================================