Split Region Manager into one routine per file.

1 files changed, 115 insertions, 0 deletions

diff --git a/cpukit/rtems/src/regionreturnsegment.c b/cpukit/rtems/src/regionreturnsegment.c
new file mode 100644
index 0000000000..7910d26e8d
--- /dev/null
+++ b/cpukit/rtems/src/regionreturnsegment.c
@@ -0,0 +1,115 @@
+/*
+ *  Region Manager
+ *
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
+#include <string.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>
+
+/*PAGE
+ *
+ *  rtems_region_return_segment
+ *
+ *  This directive will return a segment to its region.
+ *
+ *  Input parameters:
+ *    id      - region id
+ *    segment - pointer to segment address
+ *
+ *  Output parameters:
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code        - if unsuccessful
+ */
+
+rtems_status_code rtems_region_return_segment(
+  Objects_Id  id,
+  void       *segment
+)
+{
+  register Region_Control *the_region;
+  Thread_Control          *the_thread;
+  Objects_Locations        location;
+  void                   **the_segment;
+#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
+  unsigned32               size;
+#endif
+  int                      status;
+
+  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:
+
+      _Region_Debug_Walk( the_region, 3 );
+
+#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
+      if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {
+        memset(segment, (RTEMS_REGION_FREE_SHRED_BYTE & 0xFF), size);
+      } else {
+        _Thread_Enable_dispatch();
+        return RTEMS_INVALID_ADDRESS;
+      }
+#endif
+
+      status = _Region_Free_segment( the_region, segment );
+
+      _Region_Debug_Walk( the_region, 4 );
+
+      if ( !status ) {
+        _Thread_Enable_dispatch();
+        return RTEMS_INVALID_ADDRESS;
+      }
+
+      the_region->number_of_used_blocks -= 1;
+      for ( ; ; ) {
+        the_thread = _Thread_queue_First( &the_region->Wait_queue );
+
+        if ( the_thread == NULL )
+           break;
+
+        the_segment = (void **) _Region_Allocate_segment(
+           the_region, 
+           the_thread->Wait.count
+        );
+
+        if ( the_segment == NULL )
+           break;
+
+        *(void **)the_thread->Wait.return_argument = the_segment;
+        the_region->number_of_used_blocks += 1;
+        _Thread_queue_Extract( &the_region->Wait_queue, the_thread );
+        the_thread->Wait.return_code = RTEMS_SUCCESSFUL;
+      }
+
+      _Thread_Enable_dispatch();
+      return RTEMS_SUCCESSFUL;
+  }
+
+  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
+}