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/******************************************************
Copyright (c) 2011-2013 Percona LLC and/or its affiliates.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*******************************************************/
#ifndef XB_COMMON_H
#define XB_COMMON_H
#include <my_global.h>
#include <mysql_version.h>
#include <fcntl.h>
#include <stdarg.h>
#include <my_sys.h>
# define fil_is_user_tablespace_id(i) ((i) > srv_undo_tablespaces_open)
#ifdef _MSC_VER
#define stat _stati64
#define PATH_MAX MAX_PATH
#endif
#ifndef HAVE_VASPRINTF
static inline int vasprintf(char **strp, const char *fmt, va_list args)
{
int len;
#ifdef _MSC_VER
len = _vscprintf(fmt, args);
#else
len = vsnprintf(NULL, 0, fmt, args);
#endif
if (len < 0)
{
return -1;
}
*strp = (char *)malloc(len + 1);
if (!*strp)
{
return -1;
}
vsprintf(*strp, fmt, args);
return len;
}
static inline int asprintf(char **strp, const char *fmt,...)
{
va_list args;
va_start(args, fmt);
int len = vasprintf(strp, fmt, args);
va_end(args);
return len;
}
#endif
#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;
}
static inline int msg_ts(const char *fmt, ...) ATTRIBUTE_FORMAT(printf, 1, 2);
static inline int msg_ts(const char *fmt, ...)
{
int result;
time_t t = time(NULL);
char date[100];
char *line;
va_list args;
strftime(date, sizeof(date), "%y%m%d %H:%M:%S", localtime(&t));
va_start(args, fmt);
result = vasprintf(&line, fmt, args);
va_end(args);
if (result != -1) {
result = fprintf(stderr, "%s %s", date, line);
free(line);
}
return result;
}
/* 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 size_t
get_bit_shift(size_t value)
{
size_t shift;
if (value == 0)
return 0;
for (shift = 0; !(value & 1); shift++) {
value >>= 1;
}
return (value >> 1) ? 0 : shift;
}
/****************************************************************************
Read 'len' bytes from 'fd'. It is identical to my_read(..., MYF(MY_FULL_IO)),
i.e. tries to combine partial reads into a single block of size 'len', except
that it bails out on EOF or error, and returns the number of successfully read
bytes instead. */
static inline size_t
xb_read_full(File fd, uchar *buf, size_t len)
{
size_t tlen = 0;
size_t tbytes;
while (tlen < len) {
tbytes = my_read(fd, buf, len - tlen, MYF(MY_WME));
if (tbytes == 0 || tbytes == MY_FILE_ERROR) {
break;
}
buf += tbytes;
tlen += tbytes;
}
return tlen;
}
#endif
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