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SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
brief: |
Changes the size of the segment.
copyrights:
- Copyright (C) 2021 embedded brains GmbH & Co. KG
- Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
definition:
default:
attributes: null
body: null
params:
- ${../../type/if/id:/name} ${.:/params[0]/name}
- void *${.:/params[1]/name}
- ${/c/if/uintptr_t:/name} ${.:/params[2]/name}
- ${/c/if/uintptr_t:/name} *${.:/params[3]/name}
return: ${../../status/if/code:/name}
variants: []
description: |
This directive is used to increase or decrease the size of the
${.:/params[1]/name} of the region specified by ${.:/params[0]/name}. When
increasing the size of a segment, it is possible that there is no memory
available contiguous to the segment. In this case, the request is
unsatisfied.
enabled-by: true
index-entries:
- resize segment
interface-type: function
links:
- role: interface-placement
uid: header
- role: interface-ingroup
uid: group
- role: constraint
uid: /constraint/directive-not-pre-qualified
- role: constraint
uid: /constraint/directive-ctx-devinit
- role: constraint
uid: /constraint/directive-ctx-task
- role: constraint
uid: /constraint/object-allocator
name: rtems_region_resize_segment
notes: |
If an attempt to increase the size of a segment fails, then the application
may want to allocate a new segment of the desired size, copy the contents of
the original segment to the new, larger segment and then return the original
segment.
params:
- description: |
is the region identifier.
dir: null
name: id
- description: |
is the begin address of the segment to resize.
dir: null
name: segment
- description: |
is the requested new size of the segment.
dir: null
name: size
- description: |
is the pointer to an ${/c/if/uintptr_t:/name} object. When the directive
call is successful, the old size of the segment will be stored in this
object.
dir: out
name: old_size
return:
return: null
return-values:
- description: |
The requested operation was successful.
value: ${../../status/if/successful:/name}
- description: |
The ${.:/params[3]/name} parameter was ${/c/if/null:/name}.
value: ${../../status/if/invalid-address:/name}
- description: |
There was no region associated with the identifier specified by
${.:/params[0]/name}.
value: ${../../status/if/invalid-id:/name}
- description: |
The segment was not within the region.
value: ${../../status/if/invalid-address:/name}
- description: |
The region was unable to resize the segment.
value: ${../../status/if/unsatisfied:/name}
type: interface
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