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-rw-r--r--cpukit/score/src/objectallocate.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/cpukit/score/src/objectallocate.c b/cpukit/score/src/objectallocate.c
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+/*
+ * Object Handler
+ *
+ *
+ * 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.
+ *
+ * $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/address.h>
+#include <rtems/score/chain.h>
+#include <rtems/score/object.h>
+#if defined(RTEMS_MULTIPROCESSING)
+#include <rtems/score/objectmp.h>
+#endif
+#include <rtems/score/thread.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/score/sysstate.h>
+#include <rtems/score/isr.h>
+
+/*PAGE
+ *
+ * _Objects_Allocate
+ *
+ * DESCRIPTION:
+ *
+ * This function allocates a object control block from
+ * the inactive chain of free object control blocks.
+ */
+
+Objects_Control *_Objects_Allocate(
+ Objects_Information *information
+)
+{
+ Objects_Control *the_object =
+ (Objects_Control *) _Chain_Get( &information->Inactive );
+
+ if ( information->auto_extend ) {
+ /*
+ * If the list is empty then we are out of objects and need to
+ * extend information base.
+ */
+
+ if ( !the_object ) {
+ _Objects_Extend_information( information );
+ the_object = (Objects_Control *) _Chain_Get( &information->Inactive );
+ }
+
+ if ( the_object ) {
+ unsigned32 block;
+
+ block = _Objects_Get_index( the_object->id ) -
+ _Objects_Get_index( information->minimum_id );
+ block /= information->allocation_size;
+
+ information->inactive_per_block[ block ]--;
+ information->inactive--;
+ }
+ }
+
+ return the_object;
+}