!apps: drop CONFIG_SYSTEM_TIME64 conditionals

NuttX always uses a 64-bit system clock now (time_t/clock_t are
always 64-bit). Remove the obsolete CONFIG_SYSTEM_TIME64 #ifdef
branches and Kconfig dependency.

  - examples/dronecan: drop SYSTEM_TIME64 dependency
  - examples/netlink_route: always use PRIx64
  - netutils/netinit: always use the 1-hour LONG_TIME_SEC
  - netutils/ptpd: always pack the 48-bit seconds field and apply
    the 64-bit overflow guard in timespec_delta_ns()
  - testing/ostest/semtimed: always validate tv_sec >= 0

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

Author: xiaoxiang781216

examples/dronecan/Kconfig

@@ -6,7 +6,7 @@
 config EXAMPLES_DRONECAN
 	tristate "DroneCAN example"
 	default n
-	depends on CANUTILS_LIBDRONECAN && SYSTEM_TIME64
+	depends on CANUTILS_LIBDRONECAN
 	---help---
 		Enable the LIBDRONECAN example
 

examples/netlink_route/netlink_route_main.c

@@ -168,11 +168,7 @@ static void dump_neighbor(void)
           printf("  ");
         }
 
-#ifdef CONFIG_SYSTEM_TIME64
       printf("Time 0x%" PRIx64 "\n", nb->ne_time);
-#else
-      printf("Time 0x%" PRIx32 "\n", nb->ne_time);
-#endif
     }
 
   free(nbtab);

netutils/netinit/netinit.c

@@ -204,11 +204,7 @@
  * signal indicating a change in network status.
  */
 
-#ifdef CONFIG_SYSTEM_TIME64
-#  define LONG_TIME_SEC    (60*60)   /* One hour in seconds */
-#else
-#  define LONG_TIME_SEC    (5*60)    /* Five minutes in seconds */
-#endif
+#define LONG_TIME_SEC      (60*60)   /* One hour in seconds */
 
 #define SHORT_TIME_SEC     (2)       /* 2 seconds */
 

netutils/ptpd/ptpd.c

@@ -184,13 +184,8 @@ static void timespec_to_ptp_format(FAR const struct timespec *ts,
    * both fields big-endian.
    */
 
-#ifdef CONFIG_SYSTEM_TIME64
   timestamp[0] = (uint8_t)(ts->tv_sec >> 40);
   timestamp[1] = (uint8_t)(ts->tv_sec >> 32);
-#else
-  timestamp[0] = 0;
-  timestamp[1] = 0;
-#endif
   timestamp[2] = (uint8_t)(ts->tv_sec >> 24);
   timestamp[3] = (uint8_t)(ts->tv_sec >> 16);
   timestamp[4] = (uint8_t)(ts->tv_sec >>  8);
@@ -320,7 +315,6 @@ static int64_t timespec_delta_ns(FAR const struct timespec *ts1,
 
   delta_s = ts1->tv_sec - ts2->tv_sec;
 
-#ifdef CONFIG_SYSTEM_TIME64
   /* Conversion to nanoseconds could overflow if the system time is 64-bit */
 
   if (delta_s >= INT64_MAX / NSEC_PER_SEC)
@@ -331,7 +325,6 @@ static int64_t timespec_delta_ns(FAR const struct timespec *ts1,
     {
       return INT64_MIN;
     }
-#endif
 
   return delta_s * NSEC_PER_SEC + (ts1->tv_nsec - ts2->tv_nsec);
 }

testing/ostest/semtimed.c

@@ -79,11 +79,7 @@ static void ostest_gettime(struct timespec *tp)
       printf("ostest_gettime: ERROR: clock_gettime failed\n");
       ASSERT(false);
     }
-#ifdef CONFIG_SYSTEM_TIME64
   else if (tp->tv_sec < 0 || tp->tv_nsec < 0 ||
-#else
-  else if (tp->tv_nsec < 0 ||
-#endif
            tp->tv_nsec >= 1000 * 1000 * 1000)
     {
       printf("ostest_gettime: ERROR: clock_gettime returned bogus time\n");