/**********************************************************************
File-based utilities

(c) 1995 Innobase Oy

Created 12/13/1995 Heikki Tuuri
***********************************************************************/

#include "sync0rw.h"
#include "buf0buf.h"

/************************************************************************
Gets a pointer to a file address and latches the page. */
UNIV_INLINE
byte*
fut_get_ptr(
/*========*/
				/* out: pointer to a byte in a frame; the file
				page in the frame is bufferfixed and latched */
	ulint		space,	/* in: space id */
	fil_addr_t	addr,	/* in: file address */
	ulint		rw_latch, /* in: RW_S_LATCH, RW_X_LATCH */
	mtr_t*		mtr)	/* in: mtr handle */
{
	buf_block_t*	block;
	byte*		ptr;

	ut_ad(addr.boffset < UNIV_PAGE_SIZE);
	ut_ad((rw_latch == RW_S_LATCH) || (rw_latch == RW_X_LATCH));

	block = buf_page_get(space, addr.page, rw_latch, mtr);
	ptr = buf_block_get_frame(block) + addr.boffset;

#ifdef UNIV_SYNC_DEBUG
	buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
#endif /* UNIV_SYNC_DEBUG */

	return(ptr);
}