Add TOD Hooks to allow BSP to take action when TOD is set

Two use cases were envisioned for this.

1) a BSP or application which desires to update a real-time clock
   when the RTEMS TOD is set.

2) a paravirtualized BSP can use this to propagate setting the time
   in an RTEMS application to the hosting environment. This enables
   the entire set of applications in the virtualized environments
   to have a single consistent TOD.

1 files changed, 45 insertions, 0 deletions

diff --git a/cpukit/score/src/coretodhookdata.c b/cpukit/score/src/coretodhookdata.c
new file mode 100644
index 0000000000..6e7bcff494
--- /dev/null
+++ b/cpukit/score/src/coretodhookdata.c
@@ -0,0 +1,45 @@
+/**
+ * @file
+ *
+ * @brief TOD Hook Set
+ *
+ * @ingroup RTEMSScoreTODHooks
+ */
+
+/*
+ *  SPDX-License-Identifier: BSD-2-Clause
+ *
+ *  COPYRIGHT (c) 2019.
+ *  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.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/score/todimpl.h>
+#include <rtems/score/chainimpl.h>
+ 
+Chain_Control _TOD_Hooks = CHAIN_INITIALIZER_EMPTY(_TOD_Hooks);
+