diff options
Diffstat (limited to 'ppsthread.h')
| -rw-r--r-- | ppsthread.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/ppsthread.h b/ppsthread.h index 81faa033..58d4b31a 100644 --- a/ppsthread.h +++ b/ppsthread.h @@ -17,9 +17,9 @@ struct timedelta_t { #endif /* TIMEDELTA_DEFINED */ /* difference between timespecs in nanoseconds */ -/* int is too small, avoid floats */ -/* WARNING! this will overflow if x and y differ by more than a few seconds */ -#define timespec_diff_ns(x, y) (long)(((x).tv_sec-(y).tv_sec)*1000000000+(x).tv_nsec-(y).tv_nsec) +/* int is too small, 32 bit long is too small, avoid floats */ +/* MUST be long long to maintain precision on 32 bit code */ +#define timespec_diff_ns(x, y) (long long)(((x).tv_sec-(y).tv_sec)*1000000000LL+(x).tv_nsec-(y).tv_nsec) /* * Set context, devicefd, and devicename at initialization time, before |