diff options
Diffstat (limited to 'cpukit/rtems/include/rtems/rtems/region.h')
| -rw-r--r-- | cpukit/rtems/include/rtems/rtems/region.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/cpukit/rtems/include/rtems/rtems/region.h b/cpukit/rtems/include/rtems/rtems/region.h index a27dd7879b..9c8a0cffa9 100644 --- a/cpukit/rtems/include/rtems/rtems/region.h +++ b/cpukit/rtems/include/rtems/rtems/region.h @@ -232,8 +232,39 @@ rtems_status_code rtems_region_return_segment( void *segment ); +/* + * rtems_region_resize_segment + * + * DESCRIPTION: + * + * This routine implements the rtems_region_resize_segment directive. It + * tries to resize segment in the region associated with 'id' to the new size + * 'size' in place. The first 'size' or old size bytes of the segment + * (whatever is less) are guaranteed to remain unmodified. The segment must + * have been previously allocated from the same region. If resizing the + * segment results in enough memory being available to satisfy the + * rtems_region_get_segment of the first blocked task, then that task and as + * many subsequent tasks as possible will be unblocked with their requests + * satisfied. + * Returns: + * RTEMS_SUCCESSFUL - operation successful + * RTEMS_UNSATISFIED - the segment can't be resized in place + * any other code - failure. + * On RTEMS_SUCCESSFUL or RTEMS_UNSATISFIED exit it returns into the + * 'old_size' the old size in bytes of the user memory area of the specified + * segment. + */ + +rtems_status_code rtems_region_resize_segment( + Objects_Id id, + void *segment, + size_t size, + size_t *old_size +); + #ifndef __RTEMS_APPLICATION__ #include <rtems/rtems/region.inl> +extern void _Region_Process_queue(Region_Control *the_region); #endif #if defined(RTEMS_MULTIPROCESSING) #include <rtems/rtems/regionmp.h> |