score: Add _Thread_Scheduler_process_requests()

Update #2556.

1 files changed, 84 insertions, 0 deletions

diff --git a/cpukit/score/src/threadscheduler.c b/cpukit/score/src/threadscheduler.c
new file mode 100644
index 0000000000..b73598e750
--- /dev/null
+++ b/cpukit/score/src/threadscheduler.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/score/threadimpl.h>
+#include <rtems/score/schedulerimpl.h>
+
+#if defined(RTEMS_SMP)
+void _Thread_Scheduler_process_requests( Thread_Control *the_thread )
+{
+  ISR_lock_Context  lock_context;
+  Scheduler_Node   *scheduler_node;
+
+  _Thread_Scheduler_acquire_critical( the_thread, &lock_context );
+
+  scheduler_node = the_thread->Scheduler.requests;
+
+  if ( scheduler_node != NULL ) {
+    Scheduler_Node *next;
+    Scheduler_Node *remove;
+
+    the_thread->Scheduler.requests = NULL;
+    remove = NULL;
+
+    do {
+      Scheduler_Node_request request;
+
+      request = scheduler_node->Thread.request;
+      scheduler_node->Thread.request = SCHEDULER_NODE_REQUEST_NOT_PENDING;
+
+      next = scheduler_node->Thread.next_request;
+#if defined(RTEMS_DEBUG)
+      scheduler_node->Thread.next_request = NULL;
+#endif
+
+      if ( request == SCHEDULER_NODE_REQUEST_ADD ) {
+        _Chain_Append_unprotected(
+          &the_thread->Scheduler.Scheduler_nodes,
+          &scheduler_node->Thread.Scheduler_node.Chain
+        );
+      } else if ( request == SCHEDULER_NODE_REQUEST_REMOVE ) {
+        _Chain_Extract_unprotected(
+          &scheduler_node->Thread.Scheduler_node.Chain
+        );
+        scheduler_node->Thread.Scheduler_node.next = remove;
+        remove = scheduler_node;
+      } else {
+        _Assert( request == SCHEDULER_NODE_REQUEST_NOTHING );
+      }
+
+      scheduler_node = next;
+    } while ( scheduler_node != NULL );
+
+    _Thread_Scheduler_release_critical( the_thread, &lock_context );
+
+    scheduler_node = remove;
+
+    while ( scheduler_node != NULL ) {
+      next = scheduler_node->Thread.Scheduler_node.next;
+#if defined(RTEMS_DEBUG)
+      scheduler_node->Thread.Scheduler_node.next = NULL;
+#endif
+
+      scheduler_node = next;
+    }
+  } else {
+    _Thread_Scheduler_release_critical( the_thread, &lock_context );
+  }
+}
+#endif