rtems: Add rtems_clock_get_ticks_since_boot() function

This function was declared, however, a definition was missing.  Add a
validation test for it.

cpukit/rtems/src/clockgettickssinceboot.c

@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSImplClassicClock
+ *
+ * @brief This source file contains the implementation of
+ *   rtems_clock_get_ticks_since_boot().
+ */
+
+/*
+ * Copyright (C) 2022 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/rtems/clock.h>
+
+static rtems_interval _RTEMS_Clock_get_ticks_since_boot( void )
+{
+  return rtems_clock_get_ticks_since_boot();
+}
+
+#undef rtems_clock_get_ticks_since_boot
+
+rtems_interval rtems_clock_get_ticks_since_boot( void )
+{
+  return _RTEMS_Clock_get_ticks_since_boot();
+}

spec/build/cpukit/librtemscpu.yml

@@ -1184,6 +1184,7 @@ source:
 - cpukit/rtems/src/barrierrelease.c
 - cpukit/rtems/src/barrierwait.c
 - cpukit/rtems/src/clockgetsecondssinceepoch.c
+- cpukit/rtems/src/clockgettickssinceboot.c
 - cpukit/rtems/src/clockgettickspersecond.c
 - cpukit/rtems/src/clockgettod.c
 - cpukit/rtems/src/clockgettodtimeval.c

testsuites/validation/tc-clock.c

@@ -7,7 +7,7 @@
  */
 
 /*
- * Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
+ * Copyright (C) 2021, 2022 embedded brains GmbH (http://www.embedded-brains.de)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -68,11 +68,22 @@
  *
  * This test case performs the following actions:
  *
- * - Use the rtems_clock_get_ticks_since_boot() function.
+ * - Use the rtems_clock_get_ticks_since_boot() directive before and after
+ *   exactly one clock tick.
  *
  *   - Check that clock tick gets incremented.
  *
- * - Use the rtems_clock_get_ticks_per_second() function.
+ * - Use the rtems_clock_get_ticks_since_boot() directive before and after
+ *   exactly one clock tick.
+ *
+ *   - Check that clock tick gets incremented.
+ *
+ * - Use the rtems_clock_get_ticks_per_second() directive.
+ *
+ *   - Check that rtems_clock_get_ticks_per_second() actually returns 1us /
+ *     CONFIGURE_MICROSECONDS_PER_TICK.
+ *
+ * - Use the rtems_clock_get_ticks_per_second() directive.
  *
  *   - Check that rtems_clock_get_ticks_per_second() actually returns 1us /
  *     CONFIGURE_MICROSECONDS_PER_TICK.
@@ -81,43 +92,77 @@
  */
 
 /**
- * @brief Use the rtems_clock_get_ticks_since_boot() function.
+ * @brief Use the rtems_clock_get_ticks_since_boot() directive before and after
+ *   exactly one clock tick.
  */
 static void RtemsClockValClock_Action_0( void )
 {
   rtems_interval result_0;
   rtems_interval result_1;
-  int32_t difference; /* Note: rtems_interval = uint32_t (unsigned!) */
 
   result_0 = rtems_clock_get_ticks_since_boot();
   ClockTick();
   result_1 = rtems_clock_get_ticks_since_boot();
-  /*
-   * Because of the ones-complement, the overflow
-   * is handled correctly. result_0 = 0xFFFFFFFF will become -1
-   * and result_1 = 0x0 will become 0.
-   */
-  difference = (int32_t) result_1 - (int32_t) result_0;
 
   /*
    * Check that clock tick gets incremented.
    */
-  T_step_eq_i32( 0, difference, 1 );
+  T_step_eq_u32( 0, result_1 - result_0, 1 );
 }
 
 /**
- * @brief Use the rtems_clock_get_ticks_per_second() function.
+ * @brief Use the rtems_clock_get_ticks_since_boot() directive before and after
+ *   exactly one clock tick.
  */
 static void RtemsClockValClock_Action_1( void )
+{
+  rtems_interval result_0;
+  rtems_interval result_1;
+
+  #undef rtems_clock_get_ticks_since_boot
+
+  result_0 = rtems_clock_get_ticks_since_boot();
+  ClockTick();
+  result_1 = rtems_clock_get_ticks_since_boot();
+
+  /*
+   * Check that clock tick gets incremented.
+   */
+  T_step_eq_u32( 1, result_1 - result_0, 1 );
+}
+
+/**
+ * @brief Use the rtems_clock_get_ticks_per_second() directive.
+ */
+static void RtemsClockValClock_Action_2( void )
 {
   rtems_interval result;
+
   result = rtems_clock_get_ticks_per_second();
 
   /*
    * Check that rtems_clock_get_ticks_per_second() actually returns 1us /
    * CONFIGURE_MICROSECONDS_PER_TICK.
    */
-  T_step_eq_u32( 1, result, 1000000UL / TEST_MICROSECONDS_PER_TICK );
+  T_step_eq_u32( 2, result, 1000000UL / TEST_MICROSECONDS_PER_TICK );
+}
+
+/**
+ * @brief Use the rtems_clock_get_ticks_per_second() directive.
+ */
+static void RtemsClockValClock_Action_3( void )
+{
+  rtems_interval result;
+
+  #undef rtems_clock_get_ticks_per_second
+
+  result = rtems_clock_get_ticks_per_second();
+
+  /*
+   * Check that rtems_clock_get_ticks_per_second() actually returns 1us /
+   * CONFIGURE_MICROSECONDS_PER_TICK.
+   */
+  T_step_eq_u32( 3, result, 1000000UL / TEST_MICROSECONDS_PER_TICK );
 }
 
 /**
@@ -125,10 +170,12 @@ static void RtemsClockValClock_Action_1( void )
  */
 T_TEST_CASE( RtemsClockValClock )
 {
-  T_plan( 2 );
+  T_plan( 4 );
 
   RtemsClockValClock_Action_0();
   RtemsClockValClock_Action_1();
+  RtemsClockValClock_Action_2();
+  RtemsClockValClock_Action_3();
 }
 
 /** @} */