score: Rename tc_getfrequency()

Rename tc_getfrequency() to _Timecounter_Get_frequency().

Update #2349.

cpukit/include/rtems/score/timecounter.h

@@ -292,6 +292,14 @@ void _Timecounter_Set_NTP_update_second(
  */
 void _Timecounter_NTP_update_second(int64_t *adjustment, time_t *newsec);
 
+/**
+ * @brief Gets the frequency in Hz of the current timecounter at some time
+ *   point during the call.
+ *
+ * @return Returns the frequency in Hz.
+ */
+uint64_t _Timecounter_Get_frequency(void);
+
 /** @} */
 
 #ifdef __cplusplus

cpukit/include/sys/timetc.h

@@ -16,6 +16,10 @@
 #ifndef _KERNEL
 #error "no user-serviceable parts inside"
 #endif
+#else /* __rtems__ */
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
 #endif /* __rtems__ */
 
 /*-
@@ -36,6 +40,7 @@ struct vdso_timehands32;
 typedef u_int timecounter_get_t(struct timecounter *);
 #else /* __rtems__ */
 typedef uint32_t timecounter_get_t(struct timecounter *);
+#define	tc_getfrequency _Timecounter_Get_frequency
 #endif /* __rtems__ */
 typedef void timecounter_pps_t(struct timecounter *);
 typedef uint32_t timecounter_fill_vdso_timehands_t(struct vdso_timehands *,
@@ -104,4 +109,9 @@ void	cpu_tick_calibration(void);
 SYSCTL_DECL(_kern_timecounter);
 #endif
 
+#ifdef __rtems__
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* __rtems__ */
 #endif /* !_SYS_TIMETC_H_ */

cpukit/score/src/kern_tc.c

@@ -1513,7 +1513,6 @@ unlock:
 #endif /* __rtems__ */
 }
 
-#ifndef __rtems__
 /* Report the frequency of the current timecounter. */
 uint64_t
 tc_getfrequency(void)
@@ -1522,6 +1521,7 @@ tc_getfrequency(void)
 	return (timehands->th_counter->tc_frequency);
 }
 
+#ifndef __rtems__
 static bool
 sleeping_on_old_rtc(struct thread *td)
 {