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#include "gtm/gtm_c.h"
#include "gtm/gtm_gxid.h"
/*
* GlobalTransactionIdPrecedes --- is id1 logically < id2?
*/
bool
GlobalTransactionIdPrecedes(GlobalTransactionId id1, GlobalTransactionId id2)
{
/*
* If either ID is a permanent XID then we can just do unsigned
* comparison. If both are normal, do a modulo-2^31 comparison.
*/
int32 diff;
if (!GlobalTransactionIdIsNormal(id1) || !GlobalTransactionIdIsNormal(id2))
return (id1 < id2);
diff = (int32) (id1 - id2);
return (diff < 0);
}
/*
* GlobalTransactionIdPrecedesOrEquals --- is id1 logically <= id2?
*/
bool
GlobalTransactionIdPrecedesOrEquals(GlobalTransactionId id1, GlobalTransactionId id2)
{
int32 diff;
if (!GlobalTransactionIdIsNormal(id1) || !GlobalTransactionIdIsNormal(id2))
return (id1 <= id2);
diff = (int32) (id1 - id2);
return (diff <= 0);
}
/*
* GlobalTransactionIdFollows --- is id1 logically > id2?
*/
bool
GlobalTransactionIdFollows(GlobalTransactionId id1, GlobalTransactionId id2)
{
int32 diff;
if (!GlobalTransactionIdIsNormal(id1) || !GlobalTransactionIdIsNormal(id2))
return (id1 > id2);
diff = (int32) (id1 - id2);
return (diff > 0);
}
/*
* GlobalTransactionIdFollowsOrEquals --- is id1 logically >= id2?
*/
bool
GlobalTransactionIdFollowsOrEquals(GlobalTransactionId id1, GlobalTransactionId id2)
{
int32 diff;
if (!GlobalTransactionIdIsNormal(id1) || !GlobalTransactionIdIsNormal(id2))
return (id1 >= id2);
diff = (int32) (id1 - id2);
return (diff >= 0);
}
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