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+/**
+ * @file rtems/posix/priority.h
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2008.
+ *  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.
+ *
+ *  $Id$
+ */
+
+#ifndef _RTEMS_POSIX_PRIORITY_H
+#define _RTEMS_POSIX_PRIORITY_H
+
+#include <rtems/score/priority.h>
+
+/**
+ *  1003.1b-1993,2.2.2.80 definition of priority, p. 19
+ *
+ *  "Numerically higher values represent higher priorities."
+ *
+ *  Thus, RTEMS Core has priorities run in the opposite sense of the POSIX API.
+ *
+ *  There are only 254 posix priority levels since a task at priority level
+ *  255 would never run because of the RTEMS idle task.  This is necessary
+ *  because GNAT maps the lowest Ada task priority to the lowest thread
+ *  priority.  The lowest priority Ada task should get to run, so there is
+ *  a fundamental conflict with having 255 priorities.
+ *
+ *  But since RTEMS can be configured with fewer than 256 priorities,
+ *  we use the internal constant.
+ */
+#define POSIX_SCHEDULER_MAXIMUM_PRIORITY (PRIORITY_MAXIMUM - 1)
+
+
+/**
+ *  This is the numerically least important POSIX priority.
+ */
+#define POSIX_SCHEDULER_MINIMUM_PRIORITY (1)
+
+/**
+ *  1003.1b-1993,2.2.2.80 definition of priority, p. 19
+ *
+ *  "Numerically higher values represent higher priorities."
+ *
+ *  Thus, RTEMS Core has priorities run in the opposite sense of the POSIX API.
+ *
+ *  @param[in] priority is the priority to test
+ *
+ *  @return This method returns true if the priority is valid and
+ *          false otherwise.
+ */
+bool _POSIX_Priority_Is_valid(
+  int priority
+);
+
+/**
+ *  @brief Convert POSIX Priority To SuperCore Priority
+ *
+ *  This method converts a POSIX API priority into onto the corresponding
+ *  SuperCore value.
+ *
+ *  @param[in] priority is the POSIX API priority.
+ *
+ *  @return This method returns the corresponding SuperCore priority.
+ */
+RTEMS_INLINE_ROUTINE Priority_Control _POSIX_Priority_To_core(
+  int priority
+);
+
+/**
+ *  @brief Convert SuperCore Priority To POSIX Priority
+ *
+ *  This method converts a SuperCore priority into onto the corresponding
+ *  POSIX API value.
+ *
+ *  @param[in] priority is the POSIX API priority.
+ *
+ *  @return This method returns the corresponding POSIX priority.
+ */
+RTEMS_INLINE_ROUTINE int _POSIX_Priority_From_core(
+  Priority_Control priority
+);
+
+#include <rtems/posix/priority.inl>
+
+#endif