xiaoxiang781216 commented on code in PR #18331:
URL: https://github.com/apache/nuttx/pull/18331#discussion_r2758567966
##########
arch/sim/src/sim/posix/sim_hosttime.c:
##########
@@ -119,19 +133,36 @@ void host_sleepuntil(uint64_t nsec)
int host_settimer(uint64_t nsec)
{
- struct itimerspec tspec =
- {
- 0
- };
+#ifdef NUTTX_DARWIN
+ /* macOS implementation using setitimer() */
+
+ struct itimerval it;
+ uint64_t usec = nsec / 1000;
+
+ it.it_value.tv_sec = usec / 1000000;
+ it.it_value.tv_usec = usec % 1000000;
+
+ /* One-shot timer */
+ it.it_interval.tv_sec = 0;
+ it.it_interval.tv_usec = 0;
+
+ return setitimer(ITIMER_REAL, &it, NULL);
Review Comment:
why not use setitimer on Linux too? https://linux.die.net/man/2/setitimer
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