HP A4500A - VMEbus Single Board Computer 744 Motherboard Programmer's Manual page 16

APRI Overview
What is the HP ACSE/Presentation and ROSE Interface
#define ap_errno _ap_errno()
• Any multi-threaded application program, which also includes
osi_lib.h, should include it after the threads-specific include files.
• See the appropriate man page regarding thread-safe information
about the various api's.
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