#include <postgres.h>
#include <fmgr.h>

int xid_to_int4(TransactionId xid)
{
   return xid;
}

/*
 * To bind this into PGSQL, try something like:
 *
 * CREATE FUNCTION xid_to_int4(xid) RETURNS int4
 *  AS '/path/to/rails-port/db/functions/libpgosm', 'xid_to_int4'
 *  LANGUAGE C IMMUTABLE STRICT;
 *
 * (without all the *s)
 */