Experimental Physics and
Industrial Control System

Till Straumann <[email protected]> · Thu, 27 Jan 2011 19:52:47 -0600

I found that for one of my applications the size of the registry's
hash table was too small. However, it is impossible to make it
bigger (w/o recompiling EPICS, that is -- or using a special
prioritized C++ global constructor hack).

registrySetTableSize() can only be called before the hash table
is lazy-initialized but that apparently happens from some C++
global constructor already so that the application gets it's shot
too late (i.e., even the first line of 'main()' is too late).

(Since the registry is used for registering function names for
iocsh etc. it is impossible to set the table size from a startup
script anyways.)

-- Till

PS: An alternate 'general-purpose' hash implementation using
the linear-hashing algorithm could be explored. This would avoid
having to set static table sizes.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System