Function table_tuple_lock

src/include/access/tableam.h:1780–1789

* Lock a tuple in the specified mode. * * Input parameters: * relation: relation containing tuple (caller must hold suitable lock) * tid: TID of tuple to lock * snapshot: snapshot to use for visibility determinations * cid: current command ID (used for visibility test, and stored into * tuple's cmax if lock is successful) * mode: lock mode desired * wait_policy: what to do if tuple lock

 * comments for struct TM_FailureData for additional info.
 */
static inline TM_Result
table_tuple_lock(Relation rel, ItemPointer tid, Snapshot snapshot,
				 TupleTableSlot *slot, CommandId cid, LockTupleMode mode,
				 LockWaitPolicy wait_policy, uint8 flags,
				 TM_FailureData *tmfd)
{
	return rel->rd_tableam->tuple_lock(rel, tid, snapshot, slot,
									   cid, mode, wait_policy,
									   flags, tmfd);
}

/*
 * Perform operations necessary to complete insertions made via