bcanput(9f) opensolaris man page | unix.com

bcanput(9F)						   Kernel Functions for Drivers 					       bcanput(9F)

NAME
       bcanput - test for flow control in specified priority band

SYNOPSIS
       #include <sys/stream.h>

       int bcanput(queue_t *q, unsigned char pri);

INTERFACE LEVEL
       Architecture independent level 1 (DDI/DKI).

PARAMETERS
       q      Pointer to the message queue.

       pri    Message priority.

DESCRIPTION
       The  bcanput()  function  searches through the stream (starting at q) until it finds a queue containing a service routine where the message
       can be enqueued, or until it reaches the end of the stream. If found, the queue containing the service routine is tested to see if there is
       room for a message of priority pri in the queue.

       If pri is 0, bcanput() is equivalent to a call with  canput(9F).

       canputnext(q) and bcanputnext(q,pri) should always be used in preference to canput(q->q_next) and bcanput(q->q_next,pri) respectively.

RETURN VALUES
       1    If a message of priority pri can be placed on the queue.

       0    If the priority band is full.

CONTEXT
       The bcanput() function can be called from user, interrupt, or kernel context.

SEE ALSO
       bcanputnext(9F), canput(9F), canputnext(9F), putbq(9F), putnext(9F)

       Writing Device Drivers

       STREAMS Programming Guide

WARNINGS
       Drivers are responsible for both testing a queue with bcanput() and refraining from placing a message on the queue if bcanput() fails.

SunOS 5.11							    16 Jan 2006 						       bcanput(9F)