1 files changed, 82 insertions, 0 deletions
diff --git a/cpukit/include/rtems/confdefs/face.h b/cpukit/include/rtems/confdefs/face.h
new file mode 100644
index 0000000000..317d821623
--- /dev/null
+++ b/cpukit/include/rtems/confdefs/face.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSImplApplConfig
+ *
+ * @brief This header file evaluates configuration options related to
+ *   the FACE Technical Standard.
+ *
+ * The FACE Technical Standard (https://opengroup.org/face) is an
+ * open standard designed for safety critical embedded systems. It
+ * includes POSIX profiles and requirements that promote safety
+ * and portability. As a general rules, the profiles place a minimum
+ * on the services which an operating system must provide. Those
+ * same profile definitions represent the maximum services which
+ * an application may use. 
+ */
+
+/*
+ * Copyright (C) 2022 On-Line Applications Research Corporation (OAR)
+ *
+ * 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.
+ */
+
+#ifndef _RTEMS_CONFDEFS_FACE_H
+#define _RTEMS_CONFDEFS_FACE_H
+
+#ifndef __CONFIGURATION_TEMPLATE_h
+#error "Do not include this file directly, use <rtems/confdefs.h> instead"
+#endif
+
+#ifdef CONFIGURE_INIT
+
+#ifdef CONFIGURE_POSIX_TIMERS_FACE_BEHAVIOR
+
+  #include <rtems/posix/timer.h>
+
+  int _POSIX_Timer_Is_allowed(
+    clockid_t clock_id
+  )
+  {
+    /*
+     * Per the FACE Technical Standard, POSIX timers should not be
+     * allowed on CLOCK_REALTIME for safety reasons. If the application
+     * wants the FACE behavior, then this method is instantiated.
+     */
+    if (  clock_id == CLOCK_REALTIME ) {
+      return EPERM;
+    }
+
+    if ( clock_id != CLOCK_MONOTONIC ) {
+      return EINVAL;
+    }
+
+    return 0;
+  }
+
+#endif /* CONFIGURE_POSIX_TIMERS_FACE_BEHAVIOR */
+
+#endif /* CONFIGURE_INIT */
+
+#endif /* _RTEMS_CONFDEFS_FACE_H */