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Table 3 Structure of tuple_table.

From: An Embedded System Dedicated to Intervehicle Communication Applications

ID Numeric identifier: key of tuple
STAT Current tuple state: Free or Full
WRI_HEAD Current writing buffer pointer
REA_TAIL Current reading buffer pointer
MSG_NUM Count of current message in tuple
SIZE Length of the ring buffer (constant)
STA_ADD The start address of ring buffer (constant)
END_ADD The end address of ring buffer (constant)