queclass - a STREAMS macro that returns the queue message class definitions for a given message block
#include <sys/stream.h> queclass(mblk_t *bp);
Solaris DDI specific (Solaris DDI)
queclass returns the queue message class definition for a given data block pointed to by the message block bp passed in.
The message can be either QNORM, a normal priority message, or QPCTL, a high priority message.