Jelle Raaijmakers 30580ed7e4 LibPthread: Initialize conditions with realtime clock ...

All the way back in commit 1670ee5aba, the default clock for
condition variables was set to `CLOCK_MONOTONIC`, because there was no
other clock available.

However, if a condition variable is initialized without any additional
attributes by an application, they sometimes assume that the absolute
time that is passed to e.g. `pthread_cond_timedwait` is actually based
on a realtime clock, as can be seen here in SDL2:

6f419bdf5f/src/thread/pthread/SDL_syscond.c (L99)

Additionally, the glibc implementation defaults to a realtime clock:

aac54dcd37/nptl/pthread_cond_init.c (L42)

...so we probably should do so as well :^)

2021-11-24 19:44:57 +01:00

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