Change Details

This patch adds support for using the steady (monotonic) clock when waiting on a condition variable with a timeout. This feature is currently implemented for POSIX threads. The patch generalizes it to be usable with an external threading library by adding a new function __libcpp_condvar_steady_timedwait. External threading layer implementors should define _LIBCPP_HAS_COND_STEADY_TIMEDWAIT in their __external_threading header and implement the __libcpp_condvar_steady_timedwait function to use the feature.

This patch adds support for using the monotonic clock (steady_clock) when waiting on a condition variable with a timeout. This feature is currently implemented for POSIX threads. The patch generalizes it to be usable with an external threading library by adding `__libcpp_condvar_monotonic_timedwait`. The external threading layer implementors should define `_LIBCPP_CONDVAR_HAS_MONOTONIC_TIMEDWAIT` in their `__external_threading` header and implement the `__libcpp_condvar_monotonic_timedwait` function to use the feature.

This patch adds support for using the steady (monotonic) clock when(steady_clock) when waiting on a condition variable with a timeout. This feature is currently implemented for POSIX threads. The patch generalizes it to be usable with an external threading library by adding a new function `__libcpp_condvar_steadymonotonic_timedwait`. EThe external threading layer implementors should define `_LIBCPP_CONDVAR_HAS_COND_STEADYMONOTONIC_TIMEDWAIT` in their `__external_threading` header and implement the `__libcpp_condvar_steadymonotonic_timedwait` function to use the feature.