RTEMS 4.7.2 On-Line Library

Region Manager REGION_RESIZE_SEGMENT - Change size of a segment

RTEMS Ada User's Guide

14.4.8: REGION_RESIZE_SEGMENT - Change size of a segment

CALLING SEQUENCE:

procedure Region_Resize_Segment (
   ID         : in     RTEMS.ID;
   Segment    : in     RTEMS.Address;
   Size       : in     RTEMS.Unsigned32;
   Old_Size   :    out RTEMS.Unsigned32;
   Result     :    out RTEMS.Status_Codes
);

DIRECTIVE STATUS CODES:

RTEMS.SUCCESSFUL - segment obtained successfully
RTEMS.INVALID_ADDRESS - segment is NULL
RTEMS.INVALID_ADDRESS - old_size is NULL
RTEMS.INVALID_ID - invalid region id
RTEMS.INVALID_ADDRESS - segment address not in region RTEMS.UNSATISFIED - unable to make segment larger

DESCRIPTION:

This directive is used to increase or decrease the size of a segment. When increasing the size of a segment, it is possible that there is not memory available contiguous to the segment. In this case, the request is unsatisfied.

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.

RTEMS Ada User's Guide