/*

create function drive_spinlocks(count int) returns void
strict volatile language c as '.../spinlocktest.so';

 */

#include "postgres.h"

#include "access/xlog.h"
#include "fmgr.h"
#include "miscadmin.h"

PG_MODULE_MAGIC;

/*
 * drive_spinlocks(count int) returns void
 */
PG_FUNCTION_INFO_V1(drive_spinlocks);
Datum
drive_spinlocks(PG_FUNCTION_ARGS)
{
	int32		count = PG_GETARG_INT32(0);

	while (count-- > 0)
	{
		XLogGetLastRemovedSegno();

		CHECK_FOR_INTERRUPTS();
	}

	PG_RETURN_VOID();
}