Use mach_absolute_time() on OSX without clock_gettime().

[libserialport.git] / serialport.c

diff --git a/serialport.c b/serialport.c
index 15ca1fda35bc9e85f4404c18109c4cd7c9c10beb..6e681533ed24896a33de59f7e17597a4f0bf5082 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -64,6 +64,13 @@ static void get_time(struct timeval *time)
        clock_gettime(CLOCK_MONOTONIC, &ts);
        time->tv_sec = ts.tv_sec;
        time->tv_usec = ts.tv_nsec / 1000;
+#elif defined(__APPLE__)
+       mach_timebase_info_data_t info;
+       mach_timebase_info(&info);
+       uint64_t ticks = mach_absolute_time();
+       uint64_t ns = (ticks * info.numer) / info.denom;
+       time->tv_sec = ns / 1000000000;
+       time->tv_usec = (ns % 1000000000) / 1000;
 #else
        gettimeofday(time, NULL);
 #endif