Content-type: text/html Man page of bcanput

bcanput

Section: Kernel Functions for Drivers (9F)
Updated: 16 Jan 2006
Index Return to Main Contents
 

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.


 

Index

NAME
SYNOPSIS
INTERFACE LEVEL
PARAMETERS
DESCRIPTION
RETURN VALUES
CONTEXT
SEE ALSO
WARNINGS

This document was created by man2html, using the manual pages.
Time: 02:39:39 GMT, October 02, 2010