32 lines
780 B
C
32 lines
780 B
C
#ifndef SEQUENCENUMBER_H
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#define SEQUENCENUMBER_H
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#include <stdint.h>
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// mask for sequence numbers (2^24 - 1)
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#define SN_MASK 16777215
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/**
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* Mask a given sequence number to get rid of MSB.
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*/
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#define GET_MASKED_SN(x) (x & SN_MASK)
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typedef uint32_t record_sequence_number_t;
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/**
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* Compare to sequence numbers for equality.
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*
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* @param a first sequence number
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* @param b second sequence number
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* @return 1, if sequence numbers are equal, 0 otherwise.
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*/
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int sn_equal(record_sequence_number_t a, record_sequence_number_t b);
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/**
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* Increment the given sequence number. Wraps around, if 2^24 is reached.
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*
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* @param sn sequence number to increment
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* @return the incremented sequenced number
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*/
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record_sequence_number_t sn_increment(record_sequence_number_t sn);
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#endif |