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| author | A. Wilcox <AWilcox@Wilcox-Tech.com> | 2022-12-29 21:21:32 -0600 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2023-02-12 18:03:24 -0500 |
| commit | 7d756e1c04de6eb3f2b3d3e1141a218bb329fcfb (patch) | |
| tree | beaef48969dcb8c8fe74cef00a910e78402611cb | |
| parent | 07616721f1fa6cb215ffbef23441cae80412484f (diff) | |
| download | musl-7d756e1c04de6eb3f2b3d3e1141a218bb329fcfb.tar.gz | |
dns: prefer monotonic clock for timeouts
Before this commit, DNS timeouts always used CLOCK_REALTIME, which
could produce spurious timeouts or delays if wall time changed for
whatever reason.
Now we try CLOCK_MONOTONIC and only fall back to CLOCK_REALTIME when
it is unavailable.
| -rw-r--r-- | src/network/res_msend.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/network/res_msend.c b/src/network/res_msend.c index 11c6aa0e..fef7e3a2 100644 --- a/src/network/res_msend.c +++ b/src/network/res_msend.c @@ -25,7 +25,8 @@ static void cleanup(void *p) static unsigned long mtime() { struct timespec ts; - clock_gettime(CLOCK_REALTIME, &ts); + if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0 && errno == ENOSYS) + clock_gettime(CLOCK_REALTIME, &ts); return (unsigned long)ts.tv_sec * 1000 + ts.tv_nsec / 1000000; } |