1 files changed, 100 insertions, 0 deletions
diff --git a/cpukit/rtems/src/regionextend.c b/cpukit/rtems/src/regionextend.c
new file mode 100644
index 0000000000..25883e4c28
--- /dev/null
+++ b/cpukit/rtems/src/regionextend.c
@@ -0,0 +1,100 @@
+/*
+ *  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.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#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>
+#include <rtems/score/apimutex.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,
+  uint32_t            length
+)
+{
+  Region_Control     *the_region;
+  Objects_Locations   location;
+  uint32_t            amount_extended;
+  Heap_Extend_status  heap_status;
+  rtems_status_code   status;
+
+  if ( !starting_address )
+    return RTEMS_INVALID_ADDRESS;
+
+  status = RTEMS_SUCCESSFUL;
+
+  _RTEMS_Lock_allocator();                      /* to prevent deletion */
+  the_region = _Region_Get( id, &location );
+  switch ( location ) {
+    case OBJECTS_REMOTE:        /* this error cannot be returned */
+      _RTEMS_Unlock_allocator();
+      return RTEMS_INTERNAL_ERROR;
+
+    case OBJECTS_ERROR:
+      _RTEMS_Unlock_allocator();
+      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;
+      }
+      _RTEMS_Unlock_allocator();
+      return( status );
+  }
+
+  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
+}