Julian Oes 98ae0186e9 px4_sem: use px4_sem on all POSIX system
This uses the "fake" px4_sem based on mutex and condition_variable on
all POSIX system, not just macOS and Cygwin. This means that we can
change px4_sem_timedwait under the hood and inject the simulated time.
2018-12-22 10:32:18 +01:00
..