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57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
/***********************************************************************
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Copyright (c) 2017, 2019, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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***********************************************************************/
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/**************************************************//**
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@file os0api.h
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The interface to the helper functions.
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These functions are used on os0file.h where
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including full full header is not feasible and
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implemented on buf0buf.cc and fil0fil.cc.
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*******************************************************/
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#ifndef OS_API_H
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#define OS_API_H 1
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/** Page control block */
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class buf_page_t;
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/** File Node */
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struct fil_node_t;
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/**
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Should we punch hole to deallocate unused portion of the page.
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@param[in] bpage Page control block
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@return true if punch hole should be used, false if not */
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bool
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buf_page_should_punch_hole(
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const buf_page_t* bpage)
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MY_ATTRIBUTE((warn_unused_result));
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/**
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Calculate the length of trim (punch_hole) operation.
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@param[in] bpage Page control block
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@param[in] write_length Write length
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@return length of the trim or zero. */
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ulint
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buf_page_get_trim_length(
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const buf_page_t* bpage,
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ulint write_length)
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MY_ATTRIBUTE((warn_unused_result));
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#endif /* OS_API_H */
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