diff options
Diffstat (limited to 'src/rt-app_utils.c')
| -rw-r--r-- | src/rt-app_utils.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/rt-app_utils.c b/src/rt-app_utils.c index d749cfc..1ef2f7a 100644 --- a/src/rt-app_utils.c +++ b/src/rt-app_utils.c @@ -116,6 +116,23 @@ timespec_lower(struct timespec *what, struct timespec *than) return 0; } +int64_t +timespec_sub_to_ns(struct timespec *t1, struct timespec *t2) +{ + int64_t diff; + + if (t1->tv_nsec < t2->tv_nsec) { + diff = 1E9 * (int64_t)((int) t1->tv_sec - + (int) t2->tv_sec - 1); + diff += ((int) t1->tv_nsec + 1E9 - (int) t2->tv_nsec); + } else { + diff = 1E9 * (int64_t)((int) t1->tv_sec - (int) t2->tv_sec); + diff += ((int) t1->tv_nsec - (int) t2->tv_nsec); + } + return diff; +} + + void log_timing(FILE *handler, timing_point_t *t) { |