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/*

 * Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.

 *

 * This software may be freely used, copied, modified, and distributed

 * provided that the above copyright notice is preserved in all copies of the

 * software.

 */

/* -*-C-*-

 *

 * $Revision: 1.2 $

 *     $Date: 2003-08-15 01:06:10 $

 *

 *

 *   Project: ANGEL

 *

 *     Title: Private header for channels implementations

 */

#ifndef angel_chanpriv_h

#define angel_chanpriv_h

/*

 * This describes the internal structure and flags for a channels packet.

 */

/* byte positions within channel packet */

#define CF_CHANNEL_BYTE_POS  0

#define CF_HOME_SEQ_BYTE_POS 1

#define CF_OPPO_SEQ_BYTE_POS 2

#define CF_FLAGS_BYTE_POS    3

#define CF_DATA_BYTE_POS     4

/* flags for FLAGS field */

#define CF_RELIABLE  (1 << 0)    /* use reliable channels protocol */

#define CF_RESEND    (1 << 1)    /* this is a renegotiation packet */

#define CF_HEARTBEAT (1 << 2)    /* heartbeat packet - prod target into sync */

/* byte positions within buffer */

#define CB_LINK_BYTE_POS        0   /* the link pointer */

#define CB_CHAN_HEADER_BYTE_POS 4   /* the channel frame starts here */

/* macro to get buffer position of packet component */

#define CB_PACKET(x) (CB_CHAN_HEADER_BYTE_POS + (x))

/* byte offset of packet data within buffer */

#define CB_CHAN_DATA_BYTE_POS   (CB_PACKET(CF_DATA_BYTE_POS))

/* access the link in a buffer, where b is byte pointer to buffer */

#define CB_LINK(b) ((p_Buffer)(&(b)[0]))

#define invalidChannelID(chan)  (((int)(chan)) < 0 || \

                                 (chan) >= CI_NUM_CHANNELS)

#endif /* ndef angel_chanpriv_h */

/* EOF chanpriv.h */