/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSAPIClassicPart
*
* @brief This header file provides the Partition Manager API.
*/
/*
* Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
* Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This file is part of the RTEMS quality process and was automatically
* generated. If you find something that needs to be fixed or
* worded better please post a report or patch to an RTEMS mailing list
* or raise a bug report:
*
* https://docs.rtems.org/branches/master/user/support/bugs.html
*
* For information on updating and regenerating please refer to:
*
* https://docs.rtems.org/branches/master/eng/req/howto.html
*/
/* Generated from spec:/rtems/part/if/header */
#ifndef _RTEMS_RTEMS_PART_H
#define _RTEMS_RTEMS_PART_H
#include <stddef.h>
#include <stdint.h>
#include <rtems/rtems/attr.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/types.h>
#include <rtems/score/cpu.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Generated from spec:/rtems/part/if/group */
/**
* @defgroup RTEMSAPIClassicPart Partition Manager
*
* @ingroup RTEMSAPIClassic
*
* @brief The Partition Manager provides facilities to dynamically allocate
* memory in fixed-size units.
*/
/* Generated from spec:/rtems/part/if/alignment */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief This constant defines the minimum alignment of a partition buffer in
* bytes.
*
* Use it with RTEMS_ALIGNED() to define the alignment of partition buffer
* types or statically allocated partition buffer areas.
*/
#define RTEMS_PARTITION_ALIGNMENT CPU_SIZEOF_POINTER
/* Generated from spec:/rtems/part/if/create */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief Creates a partition.
*
* This directive creates a partition of fixed size buffers from a physically
* contiguous memory space which starts at ``starting_address`` and is
* ``length`` bytes in size. Each allocated buffer is to be of ``buffer_size``
* in bytes. The assigned partition identifier is returned in ``id``. This
* partition identifier is used to access the partition with other partition
* related directives.
*
* The **attribute set** specified in ``attribute_set`` is built through a
* *bitwise or* of the attribute constants described below. Attributes not
* mentioned below are not evaluated by this directive and have no effect.
*
* The partition can have **local** or **global** scope in a multiprocessing
* network (this attribute does not refer to SMP systems).
*
* * A **local** scope is the default and can be emphasized through the use of
* the #RTEMS_LOCAL attribute. A local partition can be only used by the
* node which created it.
*
* * A **global** scope is established if the #RTEMS_GLOBAL attribute is set.
* The memory space used for the partition must reside in shared memory.
* Setting the global attribute in a single node system has no effect.
*
* This directive may cause the calling task to be preempted due to an obtain
* and release of the object allocator mutex.
*
* The partition buffer area specified by the ``starting_address`` must be
* properly aligned. It must be possible to directly store target architecture
* pointers and also the user data. For example, if the user data contains
* some long double or vector data types, the partition buffer area and the
* buffer size must take the alignment of these types into account which is
* usually larger than the pointer alignment. A cache line alignment may be
* also a factor. Use #RTEMS_PARTITION_ALIGNMENT to specify the minimum
* alignment of a partition buffer type.
*
* The ``buffer_size`` parameter must be an integral multiple of the pointer
* size on the target architecture. Additionally, ``buffer_size`` must be
* large enough to hold two pointers on the target architecture. This is
* required for RTEMS to manage the buffers when they are free.
*
* For control and maintenance of the partition, RTEMS allocates a PTCB from
* the local PTCB free pool and initializes it. Memory from the partition
* buffer area is not used by RTEMS to store the PTCB.
*
* The PTCB for a global partition is allocated on the local node. Partitions
* should not be made global unless remote tasks must interact with the
* partition. This is to avoid the overhead incurred by the creation of a
* global partition. When a global partition is created, the partition's name
* and identifier must be transmitted to every node in the system for insertion
* in the local copy of the global object table.
*
* The total number of global objects, including partitions, is limited by the
* value of the #CONFIGURE_MP_MAXIMUM_GLOBAL_OBJECTS application configuration
* option.
*
* @param name is the name of the partition.
*
* @param starting_address is the starting address of the buffer area used by
* the partition.
*
* @param length is the length in bytes of the buffer area used by the
* partition.
*
* @param buffer_size is the size in bytes of a buffer managed by the
* partition.
*
* @param attribute_set is the attribute set of the partition.
*
* @param id is the pointer to an object identifier variable. The identifier
* of the created partition object will be stored in this variable, in case
* of a successful operation.
*
* @retval ::RTEMS_SUCCESSFUL The requested operation was successful.
*
* @retval ::RTEMS_INVALID_NAME The partition name was invalid.
*
* @retval ::RTEMS_INVALID_ADDRESS The ``id`` parameter was NULL.
*
* @retval ::RTEMS_INVALID_SIZE The ``length`` parameter was 0.
*
* @retval ::RTEMS_INVALID_SIZE The ``buffer_size`` parameter was 0.
*
* @retval ::RTEMS_INVALID_SIZE The ``length`` parameter was less than the
* ``buffer_size`` parameter.
*
* @retval ::RTEMS_INVALID_SIZE The ``buffer_size`` parameter was not an
* integral multiple of the pointer size.
*
* @retval ::RTEMS_INVALID_SIZE The ``buffer_size`` parameter was less than two
* times the pointer size.
*
* @retval ::RTEMS_INVALID_ADDRESS The ``starting_address`` parameter was not
* on a pointer size boundary.
*
* @retval ::RTEMS_TOO_MANY There was no inactive object available to create a
* new partition. The number of partitions available to the application is
* configured through the #CONFIGURE_MAXIMUM_PARTITIONS configuration option.
*/
rtems_status_code rtems_partition_create(
rtems_name name,
void *starting_address,
uintptr_t length,
size_t buffer_size,
rtems_attribute attribute_set,
rtems_id *id
);
/* Generated from spec:/rtems/part/if/ident */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief Identifies a partition by the object name.
*
* This directive obtains a partition identifier associated with the partition
* name specified in ``name``.
*
* The node to search is specified in ``node``. It shall be
*
* * a valid node number,
*
* * the constant #RTEMS_SEARCH_ALL_NODES to search in all nodes,
*
* * the constant #RTEMS_SEARCH_LOCAL_NODE to search in the local node only, or
*
* * the constant #RTEMS_SEARCH_OTHER_NODES to search in all nodes except the
* local node.
*
* If the partition name is not unique, then the partition identifier will
* match the first partition with that name in the search order. However, this
* partition identifier is not guaranteed to correspond to the desired
* partition. The partition identifier is used with other partition related
* directives to access the partition.
*
* If node is #RTEMS_SEARCH_ALL_NODES, all nodes are searched with the local
* node being searched first. All other nodes are searched with the lowest
* numbered node searched first.
*
* If node is a valid node number which does not represent the local node, then
* only the partitions exported by the designated node are searched.
*
* This directive does not generate activity on remote nodes. It accesses only
* the local copy of the global object table.
*
* @param name is the object name to look up.
*
* @param node is the node or node set to search for a matching object.
*
* @param[out] id is the pointer to an object identifier variable. The object
* identifier of an object with the specified name will be stored in this
* variable, in case of a successful operation.
*
* @retval ::RTEMS_SUCCESSFUL The requested operation was successful.
*
* @retval ::RTEMS_INVALID_ADDRESS The ``id`` parameter was NULL.
*
* @retval ::RTEMS_INVALID_NAME The ``name`` parameter was 0.
*
* @retval ::RTEMS_INVALID_NAME There was no object with the specified name on
* the specified nodes.
*
* @retval ::RTEMS_INVALID_NODE In multiprocessing configurations, the
* specified node was invalid.
*/
rtems_status_code rtems_partition_ident(
rtems_name name,
uint32_t node,
rtems_id *id
);
/* Generated from spec:/rtems/part/if/delete */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief Deletes the partition.
*
* This directive deletes the partition specified by the ``id`` parameter. The
* partition cannot be deleted if any of its buffers are still allocated. The
* PTCB for the deleted partition is reclaimed by RTEMS.
*
* This directive may cause the calling task to be preempted due to an obtain
* and release of the object allocator mutex.
*
* The calling task does not have to be the task that created the partition.
* Any local task that knows the partition identifier can delete the partition.
*
* When a global partition is deleted, the partition identifier must be
* transmitted to every node in the system for deletion from the local copy of
* the global object table.
*
* The partition must reside on the local node, even if the partition was
* created with the #RTEMS_GLOBAL attribute.
*
* @param id is the partition identifier.
*
* @retval ::RTEMS_SUCCESSFUL The requested operation was successful.
*
* @retval ::RTEMS_INVALID_ID There was no partition with the specified
* identifier.
*
* @retval ::RTEMS_ILLEGAL_ON_REMOTE_OBJECT The partition resided on a remote
* node.
*
* @retval ::RTEMS_RESOURCE_IN_USE There were buffers of the partition still in
* use.
*/
rtems_status_code rtems_partition_delete( rtems_id id );
/* Generated from spec:/rtems/part/if/get-buffer */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief Tries to get a buffer from the partition.
*
* This directive allows a buffer to be obtained from the partition specified
* in the ``id`` parameter. The address of the allocated buffer is returned
* through the ``buffer`` parameter.
*
* This directive will not cause the running task to be preempted.
*
* The buffer start alignment is determined by the memory area and buffer size
* used to create the partition.
*
* A task cannot wait on a buffer to become available.
*
* Getting a buffer from a global partition which does not reside on the local
* node will generate a request telling the remote node to allocate a buffer
* from the partition.
*
* @param id is the partition identifier.
*
* @param[out] buffer is the pointer to a buffer pointer variable. The pointer
* to the allocated buffer will be stored in this variable, in case of a
* successful operation.
*
* @retval ::RTEMS_SUCCESSFUL The requested operation was successful.
*
* @retval ::RTEMS_INVALID_ID There was no partition with the specified
* identifier.
*
* @retval ::RTEMS_INVALID_ADDRESS The ``buffer`` parameter was NULL.
*
* @retval ::RTEMS_UNSATISFIED There was no free buffer available to allocate
* and return.
*/
rtems_status_code rtems_partition_get_buffer( rtems_id id, void **buffer );
/* Generated from spec:/rtems/part/if/return-buffer */
/**
* @ingroup RTEMSAPIClassicPart
*
* @brief Returns the buffer to the partition.
*
* This directive returns the buffer specified by ``buffer`` to the partition
* specified by ``id``.
*
* This directive will not cause the running task to be preempted.
*
* Returning a buffer to a global partition which does not reside on the local
* node will generate a request telling the remote node to return the buffer to
* the partition.
*
* Returning a buffer multiple times is an error. It will corrupt the internal
* state of the partition.
*
* @param id is the partition identifier.
*
* @param buffer is the pointer to the buffer to return.
*
* @retval ::RTEMS_SUCCESSFUL The requested operation was successful.
*
* @retval ::RTEMS_INVALID_ID There was no partition with the specified
* identifier.
*
* @retval ::RTEMS_INVALID_ADDRESS The buffer referenced by ``buffer`` was not
* in the partition.
*/
rtems_status_code rtems_partition_return_buffer( rtems_id id, void *buffer );
#ifdef __cplusplus
}
#endif
#endif /* _RTEMS_RTEMS_PART_H */