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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [regionextend.c] - Rev 593
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/* * Region Manager * * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: regionextend.c,v 1.2 2001-09-27 11:59:19 chris Exp $ */ #include <rtems/system.h> #include <rtems/rtems/status.h> #include <rtems/rtems/support.h> #include <rtems/score/object.h> #include <rtems/rtems/options.h> #include <rtems/rtems/region.h> #include <rtems/score/states.h> #include <rtems/score/thread.h> /*PAGE * * rtems_region_extend * * This directive attempts to grow a region of physical contiguous memory area * from which variable sized segments can be allocated. * * Input parameters: * id - id of region to grow * start - starting address of memory area for extension * length - physical length in bytes to grow the region * * Output parameters: * RTEMS_SUCCESSFUL - if successful * error code - if unsuccessful */ rtems_status_code rtems_region_extend( Objects_Id id, void *starting_address, unsigned32 length ) { Region_Control *the_region; Objects_Locations location; unsigned32 amount_extended; Heap_Extend_status heap_status; rtems_status_code status; status = RTEMS_SUCCESSFUL; the_region = _Region_Get( id, &location ); switch ( location ) { case OBJECTS_REMOTE: /* this error cannot be returned */ return RTEMS_INTERNAL_ERROR; case OBJECTS_ERROR: return RTEMS_INVALID_ID; case OBJECTS_LOCAL: heap_status = _Heap_Extend( &the_region->Memory, starting_address, length, &amount_extended ); switch ( heap_status ) { case HEAP_EXTEND_SUCCESSFUL: the_region->length += amount_extended; the_region->maximum_segment_size += amount_extended; break; case HEAP_EXTEND_ERROR: status = RTEMS_INVALID_ADDRESS; break; case HEAP_EXTEND_NOT_IMPLEMENTED: status = RTEMS_NOT_IMPLEMENTED; break; } _Thread_Enable_dispatch(); return( status ); } return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ }
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