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-rw-r--r--cpukit/rtems/src/schedulerremoveprocessor.c85
1 files changed, 72 insertions, 13 deletions
diff --git a/cpukit/rtems/src/schedulerremoveprocessor.c b/cpukit/rtems/src/schedulerremoveprocessor.c
index 79c17bda49..2fc9b524ae 100644
--- a/cpukit/rtems/src/schedulerremoveprocessor.c
+++ b/cpukit/rtems/src/schedulerremoveprocessor.c
@@ -1,31 +1,44 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
/**
* @file
*
- * @ingroup RTEMSImplClassic
+ * @ingroup RTEMSImplClassicScheduler
*
* @brief This source file contains the implementation of
* rtems_scheduler_remove_processor().
*/
/*
- * Copyright (c) 2016 embedded brains GmbH. All rights reserved.
+ * Copyright (c) 2016 embedded brains GmbH & Co. KG
*
- * embedded brains GmbH
- * Dornierstr. 4
- * 82178 Puchheim
- * Germany
- * <rtems@embedded-brains.de>
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
*
- * 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.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <rtems/rtems/tasks.h>
+#include <rtems/rtems/scheduler.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/config.h>
@@ -35,7 +48,7 @@ typedef struct {
rtems_status_code status;
} Scheduler_Processor_removal_context;
-static bool _Scheduler_Check_processor_removal(
+static bool _Scheduler_Check_processor_not_required(
Thread_Control *the_thread,
void *arg
)
@@ -68,6 +81,45 @@ static bool _Scheduler_Check_processor_removal(
_Thread_Wait_release( the_thread, &queue_context );
return iter_context->status != RTEMS_SUCCESSFUL;
}
+
+static bool _Scheduler_Check_no_helping(
+ Thread_Control *the_thread,
+ void *arg
+)
+{
+ Scheduler_Processor_removal_context *iter_context;
+ ISR_lock_Context lock_context;
+ const Chain_Node *node;
+ const Chain_Node *tail;
+
+ if ( the_thread->is_idle ) {
+ return false;
+ }
+
+ iter_context = arg;
+
+ _Thread_State_acquire( the_thread, &lock_context );
+ node = _Chain_Immutable_first( &the_thread->Scheduler.Scheduler_nodes );
+ tail = _Chain_Immutable_tail( &the_thread->Scheduler.Scheduler_nodes );
+
+ do {
+ const Scheduler_Node *scheduler_node;
+ const Scheduler_Control *scheduler;
+
+ scheduler_node = SCHEDULER_NODE_OF_THREAD_SCHEDULER_NODE( node );
+ scheduler = _Scheduler_Node_get_scheduler( scheduler_node );
+
+ if ( scheduler == iter_context->scheduler ) {
+ iter_context->status = RTEMS_RESOURCE_IN_USE;
+ break;
+ }
+
+ node = _Chain_Immutable_next( node );
+ } while ( node != tail );
+
+ _Thread_State_release( the_thread, &lock_context );
+ return iter_context->status != RTEMS_SUCCESSFUL;
+}
#endif
rtems_status_code rtems_scheduler_remove_processor(
@@ -116,7 +168,14 @@ rtems_status_code rtems_scheduler_remove_processor(
_Scheduler_Release_critical( scheduler, &lock_context );
_ISR_lock_ISR_enable( &lock_context );
- _Thread_Iterate( _Scheduler_Check_processor_removal, &iter_context );
+ _Thread_Iterate( _Scheduler_Check_processor_not_required, &iter_context );
+
+ if (
+ _Processor_mask_Is_zero( &scheduler_context->Processors ) &&
+ iter_context.status == RTEMS_SUCCESSFUL
+ ) {
+ _Thread_Iterate( _Scheduler_Check_no_helping, &iter_context );
+ }
_ISR_lock_ISR_disable( &lock_context );
_Scheduler_Acquire_critical( scheduler, &lock_context );