diff options
| -rw-r--r-- | src/platform/windows/win_clock.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/platform/windows/win_clock.c b/src/platform/windows/win_clock.c index 6cf191ee..9064b5e2 100644 --- a/src/platform/windows/win_clock.c +++ b/src/platform/windows/win_clock.c @@ -20,9 +20,27 @@ nni_plat_clock(void) void -nni_plat_usleep(nni_duration usec) +nni_plat_usleep(nni_duration dur) { - Sleep((DWORD) ((usec + 999) / 1000)); + uint64_t exp; + + + // Convert duration to msec, rounding up. + dur += 999; + dur /= 1000; + + exp = (uint64_t) GetTickCount64() + dur; + + // Sleep() would be our preferred API, if it didn't have a nasty + // feature where it rounds *down*. We always want to sleep *at + // least* the requested amount of time, and never ever less. + // If we wind up sleeping less, then we will sleep(1) in the hope + // of waiting until the next clock tick. + + Sleep((DWORD) dur); + while ((uint64_t) GetTickCount64() < exp) { + Sleep(1); + } } |