The variable used to gouard calls to the Pathfinder C library. The C library appears not to be thread safe and this variable is used to make sure that only one pathfinder call is made at time even when a number parallel calls are made to the DSH's fromQ query evaluator.
The variable used to gouard calls to the Pathfinder C library.
The C library appears not to be thread safe and this
variable is used to make sure that only one pathfinder call is made at time
even when a number parallel calls are made to the DSH's fromQ query
evaluator.

ulricha/dsh