rtems: Add rtems_scheduler_ident_by_processor()

Update #3069.

3 files changed, 67 insertions, 0 deletions

diff --git a/cpukit/rtems/Makefile.am b/cpukit/rtems/Makefile.am
index ada1f83510..e9ad2deb5d 100644
--- a/cpukit/rtems/Makefile.am
+++ b/cpukit/rtems/Makefile.am
@@ -108,6 +108,7 @@ librtems_a_SOURCES += src/taskwakewhen.c
 librtems_a_SOURCES += src/scheduleraddprocessor.c
 librtems_a_SOURCES += src/schedulergetprocessorset.c
 librtems_a_SOURCES += src/schedulerident.c
+librtems_a_SOURCES += src/scheduleridentbyprocessor.c
 librtems_a_SOURCES += src/schedulerremoveprocessor.c
 
 ## RATEMON_C_FILES
diff --git a/cpukit/rtems/include/rtems/rtems/tasks.h b/cpukit/rtems/include/rtems/rtems/tasks.h
index 88e43556ce..e68c78989d 100644
--- a/cpukit/rtems/include/rtems/rtems/tasks.h
+++ b/cpukit/rtems/include/rtems/rtems/tasks.h
@@ -560,6 +560,23 @@ rtems_status_code rtems_scheduler_ident(
 );
 
 /**
+ * @brief Identifies a scheduler by a processor index.
+ *
+ * @param[in] cpu_index The processor index.
+ * @param[out] id The scheduler identifier associated with the processor index.
+ *
+ * @retval RTEMS_SUCCESSFUL Successful operation.
+ * @retval RTEMS_INVALID_ADDRESS The @a id parameter is @c NULL.
+ * @retval RTEMS_INVALID_NAME Invalid processor index.
+ * @retval RTEMS_INCORRECT_STATE The processor index is valid, however, this
+ *   processor is not owned by a scheduler.
+ */
+rtems_status_code rtems_scheduler_ident_by_processor(
+  uint32_t  cpu_index,
+  rtems_id *id
+);
+
+/**
  * @brief Gets the set of processors owned by the specified scheduler instance.
  *
  * @param[in] scheduler_id Identifier of the scheduler instance.
diff --git a/cpukit/rtems/src/scheduleridentbyprocessor.c b/cpukit/rtems/src/scheduleridentbyprocessor.c
new file mode 100644
index 0000000000..2bc64d77d3
--- /dev/null
+++ b/cpukit/rtems/src/scheduleridentbyprocessor.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2017 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/rtems/tasks.h>
+#include <rtems/score/assert.h>
+#include <rtems/score/schedulerimpl.h>
+
+rtems_status_code rtems_scheduler_ident_by_processor(
+  uint32_t  cpu_index,
+  rtems_id *id
+)
+{
+  const Scheduler_Control *scheduler;
+
+  if ( id == NULL ) {
+    return RTEMS_INVALID_ADDRESS;
+  }
+
+  if ( cpu_index >= _SMP_Get_processor_count() ) {
+    return RTEMS_INVALID_NAME;
+  }
+
+  scheduler = _Scheduler_Get_by_CPU( _Per_CPU_Get_by_index( cpu_index ) );
+#if defined(RTEMS_SMP)
+  if ( scheduler == NULL ) {
+    return RTEMS_INCORRECT_STATE;
+  }
+#else
+  _Assert( scheduler != NULL );
+#endif
+
+  *id = _Scheduler_Build_id( _Scheduler_Get_index( scheduler ) );
+  return RTEMS_SUCCESSFUL;
+}