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/*****************************************************************************
Copyright (c) 1995, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2019, 2021, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/******************************************************************//**
@file include/fut0fut.h
File-based utilities
Created 12/13/1995 Heikki Tuuri
***********************************************************************/
#ifndef fut0fut_h
#define fut0fut_h
#include "mtr0mtr.h"
/** Gets a pointer to a file address and latches the page.
@param[in] space space id
@param[in] zip_size ROW_FORMAT=COMPRESSED page size, or 0
@param[in] addr file address
@param[in] rw_latch RW_S_LATCH, RW_X_LATCH, RW_SX_LATCH
@param[out] ptr_block file page
@param[in,out] mtr mini-transaction
@return pointer to a byte in (*ptr_block)->frame; the *ptr_block is
bufferfixed and latched */
inline
byte*
fut_get_ptr(
uint32_t space,
ulint zip_size,
fil_addr_t addr,
rw_lock_type_t rw_latch,
mtr_t* mtr,
buf_block_t** ptr_block = NULL)
{
buf_block_t* block;
byte* ptr = NULL;
ut_ad(addr.boffset < srv_page_size);
ut_ad((rw_latch == RW_S_LATCH)
|| (rw_latch == RW_X_LATCH)
|| (rw_latch == RW_SX_LATCH));
block = buf_page_get_gen(page_id_t(space, addr.page), zip_size,
rw_latch, nullptr, BUF_GET_POSSIBLY_FREED,
mtr);
if (!block) {
} else if (block->page.is_freed()) {
block = nullptr;
} else {
ptr = buf_block_get_frame(block) + addr.boffset;
}
if (ptr_block != NULL) {
*ptr_block = block;
}
return(ptr);
}
#endif /* fut0fut_h */
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