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-rw-r--r--cpukit/score/src/schedulercbsattachthread.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/cpukit/score/src/schedulercbsattachthread.c b/cpukit/score/src/schedulercbsattachthread.c
new file mode 100644
index 0000000000..7796f12a6b
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+++ b/cpukit/score/src/schedulercbsattachthread.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2011 Petr Benes.
+ * Copyright (C) 2011 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/config.h>
+#include <rtems/score/scheduler.h>
+#include <rtems/score/schedulercbs.h>
+#include <rtems/rtems/object.h>
+
+int _Scheduler_CBS_Attach_thread (
+ Scheduler_CBS_Server_id server_id,
+ rtems_id task_id
+)
+{
+ Objects_Locations location;
+ Thread_Control *the_thread;
+ Scheduler_CBS_Per_thread *sched_info;
+
+ if ( server_id < 0 || server_id >= _Scheduler_CBS_Maximum_servers )
+ return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
+
+ the_thread = _Thread_Get(task_id, &location);
+ /* The routine _Thread_Get may disable dispatch and not enable again. */
+ if ( the_thread )
+ _Thread_Enable_dispatch();
+ if ( !the_thread )
+ return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
+
+ sched_info = (Scheduler_CBS_Per_thread *) the_thread->scheduler_info;
+
+ /* Thread is already attached to a server. */
+ if ( sched_info->cbs_server )
+ return SCHEDULER_CBS_ERROR_FULL;
+
+ /* Server is not valid. */
+ if ( !_Scheduler_CBS_Server_list[server_id] )
+ return SCHEDULER_CBS_ERROR_NOSERVER;
+
+ /* Server is already attached to a thread. */
+ if ( _Scheduler_CBS_Server_list[server_id]->task_id != -1 )
+ return SCHEDULER_CBS_ERROR_FULL;
+
+ _Scheduler_CBS_Server_list[server_id]->task_id = task_id;
+ sched_info->cbs_server = (void *) _Scheduler_CBS_Server_list[server_id];
+
+ the_thread->budget_callout = _Scheduler_CBS_Budget_callout;
+ the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
+ the_thread->is_preemptible = true;
+
+ return SCHEDULER_CBS_OK;
+}