int logger_vprintf(LOGGER_HANDLE *log, const char* fmt, va_list ap)
{
int result;
my_off_t filesize;
char cvtbuf[1024];
size_t n_bytes;
mysql_mutex_lock(&log->lock);
if (log->rotations > 0)
if ((filesize= my_tell(log->file, MYF(0))) == (my_off_t) -1 ||
((unsigned long long)filesize >= log->size_limit &&
do_rotate(log)))
{
result= -1;
errno= my_errno;
goto exit; /* Log rotation needed but failed */
}
n_bytes= my_vsnprintf(cvtbuf, sizeof(cvtbuf), fmt, ap);
if (n_bytes >= sizeof(cvtbuf))
n_bytes= sizeof(cvtbuf) - 1;
result= my_write(log->file, (uchar *) cvtbuf, n_bytes, MYF(0));
exit:
mysql_mutex_unlock(&log->lock);
return result;
}
my_off_t my_b_append_tell(IO_CACHE* info)
{
/*
Sometimes we want to make sure that the variable is not put into
a register in debugging mode so we can see its value in the core
*/
#ifndef DBUG_OFF
# define dbug_volatile volatile
#else
# define dbug_volatile
#endif
/*
Prevent optimizer from putting res in a register when debugging
we need this to be able to see the value of res when the assert fails
*/
dbug_volatile my_off_t res;
/*
We need to lock the append buffer mutex to keep flush_io_cache()
from messing with the variables that we need in order to provide the
answer to the question.
*/
mysql_mutex_lock(&info->append_buffer_lock);
#ifndef DBUG_OFF
/*
Make sure EOF is where we think it is. Note that we cannot just use
my_tell() because we have a reader thread that could have left the
file offset in a non-EOF location
*/
{
volatile my_off_t save_pos;
save_pos = my_tell(info->file,MYF(0));
my_seek(info->file,(my_off_t)0,MY_SEEK_END,MYF(0));
/*
Save the value of my_tell in res so we can see it when studying coredump
*/
DBUG_ASSERT(info->end_of_file - (info->append_read_pos-info->write_buffer)
== (res=my_tell(info->file,MYF(0))));
my_seek(info->file,save_pos,MY_SEEK_SET,MYF(0));
}
#endif
res = info->end_of_file + (info->write_pos-info->append_read_pos);
mysql_mutex_unlock(&info->append_buffer_lock);
return res;
}
int logger_write(LOGGER_HANDLE *log, const char *buffer, size_t size)
{
int result;
my_off_t filesize;
mysql_mutex_lock(&log->lock);
if (log->rotations > 0)
if ((filesize= my_tell(log->file, MYF(0))) == (my_off_t) -1 ||
((unsigned long long)filesize >= log->size_limit &&
do_rotate(log)))
{
result= -1;
errno= my_errno;
goto exit; /* Log rotation needed but failed */
}
result= my_write(log->file, (uchar *) buffer, size, MYF(0));
exit:
mysql_mutex_unlock(&log->lock);
return result;
}