Tests for flow control in the given priority band.
int bcanput(q, pri) register queue_t *q; unsigned char pri;
The bcanput utility provides modules and drivers with a way to test flow control in the given priority band.
The bcanput (q, 0) call is equivalent to the canput (q) call.
| q | Specifies the queue from which to begin to test. |
| pri | Specifies the priority band to test. |
The bcanput utility returns a value of 1 if a message of the specified priority can be placed on the queue. It returns a value of 0 if the priority band is flow-controlled and sets the QWANTW flag to 0 band (the QB_WANTW flag is set to nonzero band). If the band does not yet exist on the queue in question, it returns a value of 1.
This utility is part of STREAMS Kernel Extensions.
List of Streams Programming References, Understanding STREAMS Flow Control in AIX Version 4.3 Communications Programming Concepts.