fut0fut.ic

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/**********************************************************************
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 */
{
	byte*	ptr;

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

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

#ifdef UNIV_SYNC_DEBUG
	buf_page_dbg_add_level(ptr, SYNC_NO_ORDER_CHECK);
#endif /* UNIV_SYNC_DEBUG */

	return(ptr);
}