file.cc File Reference

The interface to the operating system file i/o primitives. More...

#include "buf0checksum.h"
#include "db0err.h"
#include "fil0fil.h"
#include "mach0data.h"
#include "os0file.h"
#include "univ.i"
#include <lz4.h>
#include <zlib.h>

Functions
dberr_t	os_file_decompress_page (bool dblwr_read, byte *src, byte *dst, ulint dst_len)
	Decompress the page data contents. More...

Detailed Description

The interface to the operating system file i/o primitives.

Created 10/21/1995 Heikki Tuuri

Function Documentation

os_file_decompress_page()

dberr_t os_file_decompress_page	(	bool	dblwr_read,
		byte *	src,
		byte *	dst,
		ulint	dst_len
	)

Decompress the page data contents.

Page type must be FIL_PAGE_COMPRESSED, if not then the source contents are left unchanged and DB_SUCCESS is returned.

Parameters

[in]	dblwr_read	true of double write recovery in progress
[in,out]	src	Data read from disk, decompressed data will be copied to this page
[in,out]	dst	Scratch area to use for decompression or nullptr.
[in]	dst_len	If dst is valid, then size of the scratch area in bytes

Returns

DB_SUCCESS or error code