esbbcall(9F)

NAME

esbbcall − call function when buffer is available

SYNOPSIS

#include <sys/stream.h>
int esbbcall(int pri,
void(∗
long arg);

INTERFACE LEVEL

Architecture independent level 1 (DDI/DKI).

ARGUMENTS

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 non-zero integer is 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.

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