clrbuf(D3) clrbuf(D3)
NAME
clrbuf - erase the contents of a buffer
SYNOPSIS
#include <sys/types.h>
#include <sys/buf.h>
#include <sys/ddi.h>
void clrbuf(buf_t *bp);
Arguments
bp Pointer to the buffer header structure.
DESCRIPTION
The clrbuf function zeros a buffer and sets the b_resid member
of the buf(D4) structure to 0. Zeros are placed in the buffer
starting at the address specified by b_un.b_addr for a length
of b_bcount bytes.
Return Values
None
USAGE
If the buffer has the B_PAGEIO or the B_PHYS flag set in the
b_flags field, then clrbuf should not be called until the
proper virtual space has been allocated by a call to
bp_mapin(D3).
Level
Base or Interrupt.
Synchronization Constraints
Does not sleep.
Driver-defined basic locks, read/write locks, and sleep locks
may be held across calls to this function.
REFERENCES
bp_mapin(D3), buf(D4)
NOTICES
Portability
All processors
Applicability
ddi: 1, 2, 3, 4, 5, 5mp, 6, 6mp, 7, 7mp
Copyright 1994 Novell, Inc. Page 1