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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-*-
*
* $Revision$
* $Date$
*
*
* 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 */
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