Using preloaded PS sets

GDDM V3R2 Base Application Programming Reference

Using preloaded PS sets

GDDM V3R2 Base Application Programming Reference
SC33-0868-02

When GDDM is initialized, the current state of the PS stores is determined by a device query, which returns the identifier of any loaded sets. These preloaded sets are noted by the GDDM PS management routines, which maintain knowledge of the contents of the PS stores.

GDDM's PSLSSC call conditionally loads a symbol set into a PS store only if the PS store does not already contain a symbol set with the specified identifier. Conditional loading can be used to optimize PS loading, but it must be used with care, because incorrect results occur if different symbol sets have the same identifier. For example, an application program may load a symbol set with a given identifier, and another program running subsequently on the same device may attempt a conditional load of a different set having the same identifier. This situation can be avoided if a convention is adopted that assigns unique identifiers to specific symbol sets.

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