esbbcall(9F) Kernel Functions for Drivers esbbcall(9F)
NAME
esbbcall - call function when buffer is available
SYNOPSIS
#include <sys/stream.h>
bufcall_id_t esbbcall(uint_t pri, void (*func)(void *arg), void (arg));
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
pri Priority of allocation request (to be used by allocb(9F) function, called by esbbcall())
func Function to be called when buffer becomes available.
arg Argument to func.
DESCRIPTION
esbbcall(), like bufcall(9F), serves as a timeout(9F) call of indeterminate length. If esballoc(9F) is unable to allocate a message and
data block header to go with its externally supplied data buffer, esbbcall() can be used to schedule the routine func, to be called with
the argument arg when a buffer becomes available. func may be a routine that calls esballoc(9F) or it may be another kernel function.
RETURN VALUES
On success, a bufcall IDis returned. On failure, 0 is returned. The value returned from a successful call should be saved for possible
future use with unbufcall() should it become necessary to cancel the esbbcall() request (as at driver close time).
CONTEXT
esbbcall() can be called from user or interrupt context.
SEE ALSO
allocb(9F), bufcall(9F), esballoc(9F), timeout(9F), datab(9S), unbufcall(9F)
Writing Device Drivers STREAMS Programming Guide
SunOS 5.10 18 Feb 98 esbbcall(9F)
