Experimental Physics and
Industrial Control System

mdavidsaver via Core-talk <core-talk at aps.anl.gov> · Fri, 27 Nov 2020 18:32:22 -0000

Also, it may be worth repeating.  Even on modern Linux, support for PTHREAD_PRIO_INHERIT can't be taken for granted as some (partially) emulated environments don't implement/allow all of the syscalls necessary for PI mutex operations.

So I think it is necessary to probe for support at runtime.  eg. with glibc, an error will be returned by pthread_mutex_init().

The obvious place to do this would be in your thread once function.  Try to create a mutex with PTHREAD_PRIO_INHERIT, the fallback to PTHREAD_PRIO_NONE if this isn't possible.  This would also help convince me that a thread once is the better approach.

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System