BIOWAIT(9F) Kernel Functions for Drivers BIOWAIT(9F)
NAME
biowait - suspend processes pending completion of block I/O
SYNOPSIS
#include <sys/types.h>
#include <sys/buf.h>
int biowait(
struct buf *bp);
INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI).
PARAMETERS
bp Pointer to the
buf structure describing the transfer.
DESCRIPTION
Drivers allocating their own
buf structures with
getrbuf(9F) can
use the
biowait() function to suspend the current thread and wait for
completion of the transfer.
Drivers must call
biodone(9F) when the transfer is complete to
notify the thread blocked by
biowait().
biodone() is usually called
in the interrupt routine.
RETURN VALUES
0 Upon success
non-zero Upon
I/O failure.
biowait() calls
geterror(9F) to
retrieve the error number which it returns.
CONTEXT
biowait() can be called from user context only.
SEE ALSO
biodone(9F),
geterror(9F),
getrbuf(9F),
buf(9S) Writing Device Drivers April 11, 1991 BIOWAIT(9F)
