mirror of
https://git.rtems.org/rtems-docs/
synced 2025-07-25 13:01:54 +08:00
Sebastian Huber
parent
a9e6a1dbf8
commit
16b0d3f177
@ -15,255 +15,7 @@ Configuring a System
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general
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classic-api
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classic-init-task
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POSIX API Configuration
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=======================
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The parameters in this section are used to configure resources for the POSIX
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API supported by RTEMS. Most POSIX API objects are available by default since
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RTEMS 5.1. The queued signals and timers are only available if RTEMS was built
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with the ``--enable-posix`` build configuration option.
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.. index:: CONFIGURE_MAXIMUM_POSIX_KEYS
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.. _CONFIGURE_MAXIMUM_POSIX_KEYS:
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CONFIGURE_MAXIMUM_POSIX_KEYS
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_KEYS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_KEYS`` is the maximum number of POSIX API Keys
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that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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.. index:: CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS
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.. _CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS:
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CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS
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---------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is
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:ref:`CONFIGURE_MAXIMUM_POSIX_KEYS <CONFIGURE_MAXIMUM_POSIX_KEYS>` *
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:ref:`CONFIGURE_MAXIMUM_TASKS <CONFIGURE_MAXIMUM_TASKS>` +
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:ref:`CONFIGURE_MAXIMUM_POSIX_THREADS <CONFIGURE_MAXIMUM_POSIX_THREADS>`.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS`` is the maximum number of key
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value pairs used by POSIX API Keys that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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A key value pair is created by :c:func:`pthread_setspecific` if the value
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is not :c:macro:`NULL`, otherwise it is deleted.
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.. index:: CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES
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.. _CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES:
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CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES
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--------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES`` is the maximum number of POSIX
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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. You have
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to account for the memory used to store the messages of each message queue,
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see :ref:`CONFIGURE_MESSAGE_BUFFER_MEMORY`.
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.. index:: CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS
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.. _CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS:
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CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS
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--------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS`` is the maximum number of POSIX
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API Queued Signals that can be concurrently active.
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NOTES:
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Unlimited objects are not available for queued signals.
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Queued signals are only available if RTEMS was built with the
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``--enable-posix`` build configuration option.
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.. index:: CONFIGURE_MAXIMUM_POSIX_SEMAPHORES
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.. _CONFIGURE_MAXIMUM_POSIX_SEMAPHORES:
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CONFIGURE_MAXIMUM_POSIX_SEMAPHORES
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----------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_SEMAPHORES``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_SEMAPHORES`` is the maximum number of POSIX API
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Named Semaphores that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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Named semaphores are created with ``sem_open()``. Semaphores initialized
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with ``sem_init()`` are not affected by this configuration option since the
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storage space for these semaphores is user-provided.
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.. index:: CONFIGURE_MAXIMUM_POSIX_TIMERS
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.. _CONFIGURE_MAXIMUM_POSIX_TIMERS:
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CONFIGURE_MAXIMUM_POSIX_TIMERS
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------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_TIMERS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_TIMERS`` is the maximum number of POSIX API
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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.
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Timers are only available if RTEMS was built with the
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``--enable-posix`` build configuration option.
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.. index:: CONFIGURE_MAXIMUM_POSIX_THREADS
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.. _CONFIGURE_MAXIMUM_POSIX_THREADS:
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CONFIGURE_MAXIMUM_POSIX_THREADS
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-------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_THREADS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_THREADS`` is the maximum number of POSIX API
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Threads that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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This calculations for the required memory in the RTEMS Workspace for
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threads assume that each thread has a minimum stack size and has floating
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point support enabled. The configuration parameter
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``CONFIGURE_EXTRA_TASK_STACKS`` is used to specify thread stack
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requirements *ABOVE* the minimum size required. See :ref:`Reserve
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Task/Thread Stack Memory Above Minimum` for more information about
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``CONFIGURE_EXTRA_TASK_STACKS``.
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The maximum number of Classic API Tasks is specified by
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:ref:`CONFIGURE_MAXIMUM_TASKS <CONFIGURE_MAXIMUM_TASKS>`.
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All POSIX threads have floating point enabled.
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.. index:: CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE
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.. index:: minimum POSIX thread stack size
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.. _CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE:
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CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE
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-----------------------------------------
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CONSTANT:
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``CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE``
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DATA TYPE:
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Unsigned integer (``size_t``).
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RANGE:
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Positive.
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DEFAULT VALUE:
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The default value is two times the value of
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:ref:`CONFIGURE_MINIMUM_TASK_STACK_SIZE <CONFIGURE_MINIMUM_TASK_STACK_SIZE>`.
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DESCRIPTION:
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This configuration parameter defines the minimum stack size in bytes for
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every POSIX thread in the system.
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NOTES:
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None.
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posix-api
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POSIX Initialization Thread Configuration
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=========================================
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252
c-user/config/posix-api.rst
Normal file
252
c-user/config/posix-api.rst
Normal file
@ -0,0 +1,252 @@
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.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
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POSIX API Configuration
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=======================
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The parameters in this section are used to configure resources for the POSIX
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API supported by RTEMS. Most POSIX API objects are available by default since
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RTEMS 5.1. The queued signals and timers are only available if RTEMS was built
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with the ``--enable-posix`` build configuration option.
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.. index:: CONFIGURE_MAXIMUM_POSIX_KEYS
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.. _CONFIGURE_MAXIMUM_POSIX_KEYS:
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CONFIGURE_MAXIMUM_POSIX_KEYS
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----------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_KEYS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_KEYS`` is the maximum number of POSIX API Keys
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that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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.. index:: CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS
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.. _CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS:
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CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS
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---------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is
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:ref:`CONFIGURE_MAXIMUM_POSIX_KEYS <CONFIGURE_MAXIMUM_POSIX_KEYS>` *
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:ref:`CONFIGURE_MAXIMUM_TASKS <CONFIGURE_MAXIMUM_TASKS>` +
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:ref:`CONFIGURE_MAXIMUM_POSIX_THREADS <CONFIGURE_MAXIMUM_POSIX_THREADS>`.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS`` is the maximum number of key
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value pairs used by POSIX API Keys that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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A key value pair is created by :c:func:`pthread_setspecific` if the value
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is not :c:macro:`NULL`, otherwise it is deleted.
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.. index:: CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES
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.. _CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES:
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CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES
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--------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_MESSAGE_QUEUES`` is the maximum number of POSIX
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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. You have
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to account for the memory used to store the messages of each message queue,
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see :ref:`CONFIGURE_MESSAGE_BUFFER_MEMORY`.
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.. index:: CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS
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.. _CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS:
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CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS
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--------------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_QUEUED_SIGNALS`` is the maximum number of POSIX
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API Queued Signals that can be concurrently active.
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NOTES:
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Unlimited objects are not available for queued signals.
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Queued signals are only available if RTEMS was built with the
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``--enable-posix`` build configuration option.
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.. index:: CONFIGURE_MAXIMUM_POSIX_SEMAPHORES
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.. _CONFIGURE_MAXIMUM_POSIX_SEMAPHORES:
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CONFIGURE_MAXIMUM_POSIX_SEMAPHORES
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----------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_SEMAPHORES``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
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``CONFIGURE_MAXIMUM_POSIX_SEMAPHORES`` is the maximum number of POSIX API
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Named Semaphores that can be concurrently active.
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NOTES:
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This object class can be configured in unlimited allocation mode.
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Named semaphores are created with ``sem_open()``. Semaphores initialized
|
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with ``sem_init()`` are not affected by this configuration option since the
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storage space for these semaphores is user-provided.
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.. index:: CONFIGURE_MAXIMUM_POSIX_TIMERS
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.. _CONFIGURE_MAXIMUM_POSIX_TIMERS:
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CONFIGURE_MAXIMUM_POSIX_TIMERS
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------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_TIMERS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
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RANGE:
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Zero or positive.
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DEFAULT VALUE:
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The default value is 0.
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DESCRIPTION:
|
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``CONFIGURE_MAXIMUM_POSIX_TIMERS`` is the maximum number of POSIX API
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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.
|
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|
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Timers are only available if RTEMS was built with the
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``--enable-posix`` build configuration option.
|
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.. index:: CONFIGURE_MAXIMUM_POSIX_THREADS
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.. _CONFIGURE_MAXIMUM_POSIX_THREADS:
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CONFIGURE_MAXIMUM_POSIX_THREADS
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-------------------------------
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CONSTANT:
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``CONFIGURE_MAXIMUM_POSIX_THREADS``
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DATA TYPE:
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Unsigned integer (``uint32_t``).
|
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|
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RANGE:
|
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Zero or positive.
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DEFAULT VALUE:
|
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The default value is 0.
|
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|
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DESCRIPTION:
|
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``CONFIGURE_MAXIMUM_POSIX_THREADS`` is the maximum number of POSIX API
|
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Threads that can be concurrently active.
|
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|
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NOTES:
|
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This object class can be configured in unlimited allocation mode.
|
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|
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This calculations for the required memory in the RTEMS Workspace for
|
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threads assume that each thread has a minimum stack size and has floating
|
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point support enabled. The configuration parameter
|
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``CONFIGURE_EXTRA_TASK_STACKS`` is used to specify thread stack
|
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requirements *ABOVE* the minimum size required. See :ref:`Reserve
|
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Task/Thread Stack Memory Above Minimum` for more information about
|
||||
``CONFIGURE_EXTRA_TASK_STACKS``.
|
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|
||||
The maximum number of Classic API Tasks is specified by
|
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:ref:`CONFIGURE_MAXIMUM_TASKS <CONFIGURE_MAXIMUM_TASKS>`.
|
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|
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All POSIX threads have floating point enabled.
|
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.. index:: CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE
|
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.. index:: minimum POSIX thread stack size
|
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.. _CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE:
|
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CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE
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-----------------------------------------
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CONSTANT:
|
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``CONFIGURE_MINIMUM_POSIX_THREAD_STACK_SIZE``
|
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|
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DATA TYPE:
|
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Unsigned integer (``size_t``).
|
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|
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RANGE:
|
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Positive.
|
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|
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DEFAULT VALUE:
|
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The default value is two times the value of
|
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:ref:`CONFIGURE_MINIMUM_TASK_STACK_SIZE <CONFIGURE_MINIMUM_TASK_STACK_SIZE>`.
|
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|
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DESCRIPTION:
|
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This configuration parameter defines the minimum stack size in bytes for
|
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every POSIX thread in the system.
|
||||
|
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NOTES:
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||||
None.
|
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