mchain.h revision 7568150a58e78021968b6c22bc28e9787b33496a
/*
* Copyright (c) 2000, 2001 Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _MCHAIN_H_
#define _MCHAIN_H_
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/isa_defs.h>
#include <sys/byteorder.h>
#ifdef _LITTLE_ENDIAN
/* little-endian values on little-endian */
/*
* big-endian values on little-endian (swap)
*
* Use the BSWAP macros because they're fastest, and they're
* available in all environments where we use this header.
*/
#else /* (BYTE_ORDER == LITTLE_ENDIAN) */
/* little-endian values on big-endian (swap) */
/* big-endian values on big-endian */
#endif /* (BYTE_ORDER == LITTLE_ENDIAN) */
#ifdef _KERNEL
/* BEGIN CSTYLED */
/*
* BSD-style mbufs, vs SysV-style mblks:
* One big difference: the mbuf payload is:
* m_data ... (m_data + m_len)
* In Unix STREAMS, the mblk payload is:
* b_rptr ... b_wptr
*
* Here are some handy conversion notes:
*
* struct mbuf struct mblk
* m->m_next m->b_cont
* m->m_nextpkt m->b_next
* m->m_data m->b_rptr
* m->m_len MBLKL(m)
* m->m_dat[] m->b_datap->db_base
* &m->m_dat[MLEN] m->b_datap->db_lim
* M_TRAILINGSPACE(m) MBLKTAIL(m)
* m_freem(m) freemsg(m)
*
* Note that mbufs chains also have a special "packet" header,
* which has the length of the whole message. In STREAMS one
* typically just calls msgdsize(m) to get that.
*/
/* END CSTYLED */
/*
* Type of copy for mb_{put|get}_mem()
*/
#define MB_MSYSTEM 0 /* use bcopy() */
struct mbchain {
};
struct mdchain {
};
/*
* Additions for Solaris to replace things that came from
* wrappers for streams functions. See: subr_mchain.c
*/
/* length to m_copym to copy all */
#define M_COPYALL -1
#endif /* ifdef _KERNEL */
#endif /* !_MCHAIN_H_ */