rtems: Add rtems_scheduler_get_maximum_priority()

Update #3636.

1 files changed, 53 insertions, 0 deletions

diff --git a/cpukit/rtems/src/schedulergetmaxprio.c b/cpukit/rtems/src/schedulergetmaxprio.c
new file mode 100644
index 0000000000..a1eef31761
--- /dev/null
+++ b/cpukit/rtems/src/schedulergetmaxprio.c
@@ -0,0 +1,53 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2018 embedded brains GmbH
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/rtems/tasks.h>
+#include <rtems/score/schedulerimpl.h>
+
+rtems_status_code rtems_scheduler_get_maximum_priority(
+  rtems_id             scheduler_id,
+  rtems_task_priority *priority
+)
+{
+  uint32_t index;
+
+  if ( priority == NULL ) {
+    return RTEMS_INVALID_ADDRESS;
+  }
+
+  index = _Scheduler_Get_index_by_id( scheduler_id );
+  if ( index >= _Scheduler_Count ) {
+    return RTEMS_INVALID_ID;
+  }
+
+  *priority = _Scheduler_Table[ index ].maximum_priority;
+  return RTEMS_SUCCESSFUL;
+}