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58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
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/*
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* Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
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*
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* This software may be freely used, copied, modified, and distributed
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* provided that the above copyright notice is preserved in all copies of the
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* software.
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*/
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/* -*-C-*-
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*
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* $Revision$
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* $Date$
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*
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*
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* Project: ANGEL
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*
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* Title: Private header for channels implementations
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*/
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#ifndef angel_chanpriv_h
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#define angel_chanpriv_h
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/*
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* This describes the internal structure and flags for a channels packet.
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*/
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/* byte positions within channel packet */
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#define CF_CHANNEL_BYTE_POS 0
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#define CF_HOME_SEQ_BYTE_POS 1
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#define CF_OPPO_SEQ_BYTE_POS 2
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#define CF_FLAGS_BYTE_POS 3
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#define CF_DATA_BYTE_POS 4
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/* flags for FLAGS field */
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#define CF_RELIABLE (1 << 0) /* use reliable channels protocol */
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#define CF_RESEND (1 << 1) /* this is a renegotiation packet */
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#define CF_HEARTBEAT (1 << 2) /* heartbeat packet - prod target into sync */
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/* byte positions within buffer */
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#define CB_LINK_BYTE_POS 0 /* the link pointer */
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#define CB_CHAN_HEADER_BYTE_POS 4 /* the channel frame starts here */
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/* macro to get buffer position of packet component */
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#define CB_PACKET(x) (CB_CHAN_HEADER_BYTE_POS + (x))
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/* byte offset of packet data within buffer */
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#define CB_CHAN_DATA_BYTE_POS (CB_PACKET(CF_DATA_BYTE_POS))
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/* access the link in a buffer, where b is byte pointer to buffer */
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#define CB_LINK(b) ((p_Buffer)(&(b)[0]))
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#define invalidChannelID(chan) (((int)(chan)) < 0 || \
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(chan) >= CI_NUM_CHANNELS)
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#endif /* ndef angel_chanpriv_h */
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/* EOF chanpriv.h */
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