Mother Board Drivers ...........?? Post: 302098856

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biowait

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

SunOS 5.10							    11 Apr 1991 						       biowait(9F)