[mono] Allow uses of pthread_condattr_setclock on Apple and Android

[lambdageek]

For Android, it seems like this was broken prior to NDK r21, but we require r21
as a minimum now.

For ios it was not available prior to ios 10, which is also our minimumm now.

Fixes#58737

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Issue Details

---

For Android, it seems like this was broken prior to NDK r21, but we require r21
as a minimum now.

For ios it was not available prior to ios 10, which is also our minimumm now.

Fixes #58737

Author:	lambdageek
Assignees:	-
Labels:	area-VM-meta-mono
Milestone:	-

[lambdageek]

Actually doesn't look like apple have pthread_condattr_setclock. Why did we think that it does?

[lambdageek]

Oh, maybe I misunderstood @akoeplinger - CLOCK_MONOTONIC is available on ios 10+, but not pthread_condattr_setclock.

#58701 (comment)

So we would want to use pthread_cond_timedwait with a CLOCK_MONOTONIC argument on Apple.

[ghost]

Draft Pull Request was automatically closed for inactivity. Please let us know if you'd like to reopen it.