~laurynas-biveinis/percona-xtrabackup/xb-changed-page-bitmap

/******************************************************

Copyright (c) 2011 Percona Ireland Ltd.

Common declarations for XtraBackup.

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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

*******************************************************/

#ifndef XB_COMMON_H

#define XB_COMMON_H

#include <my_global.h>

#include <mysql_version.h>

#include <fcntl.h>

#include <stdarg.h>

#define xb_a(expr)							\

	do {								\

		if (!(expr)) {						\

			msg("Assertion \"%s\" failed at %s:%lu\n",	\

			    #expr, __FILE__, (ulong) __LINE__);		\

			abort();					\

		}							\

	} while (0);

#ifdef XB_DEBUG

#define xb_ad(expr) xb_a(expr)

#else

#define xb_ad(expr)

#endif

#define XB_DELTA_INFO_SUFFIX ".meta"

static inline int msg(const char *fmt, ...) ATTRIBUTE_FORMAT(printf, 1, 2);

static inline int msg(const char *fmt, ...)

{

	int	result;

	va_list args;

	va_start(args, fmt);

	result = vfprintf(stderr, fmt, args);

	va_end(args);

	return result;

}

#if MYSQL_VERSION_ID >= 50500

# define MY_FREE(a) my_free(a)

#else

# define MY_FREE(a) my_free(a, MYF(0))

#endif

/* Use POSIX_FADV_NORMAL when available */

#ifdef POSIX_FADV_NORMAL

# define USE_POSIX_FADVISE

#else

# define POSIX_FADV_NORMAL

# define POSIX_FADV_SEQUENTIAL

# define POSIX_FADV_DONTNEED

# define posix_fadvise(a,b,c,d) do {} while(0)

#endif

/***********************************************************************

Computes bit shift for a given value. If the argument is not a power

of 2, returns 0.*/

static inline ulong

get_bit_shift(ulong value)

{

    ulong shift;

    if (value == 0)

	return 0;

    for (shift = 0; !(value & 1UL); shift++) {

	value >>= 1;

    }

    return (value >> 1) ? 0 : shift;

}

#endif