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/***********************************************************************
Copyright (c) 2017, 2019, 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, Suite 500, Boston, MA 02110-1335 USA
***********************************************************************/
/**************************************************//**
@file os0api.h
The interface to the helper functions.
These functions are used on os0file.h where
including full full header is not feasible and
implemented on buf0buf.cc and fil0fil.cc.
*******************************************************/
#ifndef OS_API_H
#define OS_API_H 1
/** Page control block */
class buf_page_t;
/** File Node */
struct fil_node_t;
/**
Should we punch hole to deallocate unused portion of the page.
@param[in] bpage Page control block
@return true if punch hole should be used, false if not */
bool
buf_page_should_punch_hole(
const buf_page_t* bpage)
MY_ATTRIBUTE((warn_unused_result));
/**
Calculate the length of trim (punch_hole) operation.
@param[in] bpage Page control block
@param[in] write_length Write length
@return length of the trim or zero. */
ulint
buf_page_get_trim_length(
const buf_page_t* bpage,
ulint write_length)
MY_ATTRIBUTE((warn_unused_result));
#endif /* OS_API_H */
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