mORMot Open Source

Mo0211

Member

Registered: 2018-12-30

Posts: 42

Clock redirection in mormot2

Hi,
I found a clock redirection in mormot.core.os.posix.inc that changes CLOCK_REALTIME and CLOCK_MONOTONIC to their *_FAST variants before calling libc’s clock_gettime.
In our Linux/FPC build, the RTL uses clock readings to calculate absolute deadlines for event waits. Replacing the requested clock ID can make the timestamp use a different clock source or resolution than the wait expects.
This appears to affect short timeouts in particular: a deadline can already be expired when the wait checks it.

Is it possible to not use this redirection in any way or to have a parameter to use the normal version?

Thank you for your feedback!

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 15,622

Website

Re: Clock redirection in mormot2

You can disable those redirections by defining the proper conditional in the package.