int file_fsync(unsigned int file_id, int thread_id)
{
FILE_DESCRIPTOR fd = files[file_id];
#ifdef HAVE_LIBAIO
struct iocb iocb;
#else
(void)thread_id; /* unused */
#endif
/*
FIXME: asynchronous fsync support is missing
in Linux kernel at the moment
*/
if (file_io_mode == FILE_IO_MODE_SYNC
|| file_io_mode == FILE_IO_MODE_ASYNC
#if defined(HAVE_MMAP) && SIZEOF_SIZE_T == 4
/* Use fsync in mmaped mode on 32-bit architectures */
|| file_io_mode == FILE_IO_MODE_MMAP
#endif
)
{
if (file_fsync_mode == FSYNC_ALL)
#ifndef _WIN32
return fsync(fd);
#else
return !FlushFileBuffers(fd);
#endif
#ifdef HAVE_FDATASYNC
return fdatasync(fd);
#else
log_text(LOG_ALERT, "Unknown fsync mode: %d", file_fsync_mode);
return -1;
#endif
}
#ifdef HAVE_LIBAIO
else if (file_io_mode == FILE_IO_MODE_ASYNC)
{
/* Use asynchronous fsync */
if (file_fsync_mode == FSYNC_ALL)
io_prep_fsync(&iocb, fd);
else
io_prep_fdsync(&iocb, fd);
return file_submit_or_wait(&iocb, FILE_OP_TYPE_FSYNC, 0, thread_id);
}
#endif
#ifdef HAVE_MMAP
/* Use msync on file on 64-bit architectures */
else if (file_io_mode == FILE_IO_MODE_MMAP)
{
#ifndef _WIN32
msync(mmaps[file_id], file_size, MS_SYNC | MS_INVALIDATE);
#else
FlushViewOfFile(mmaps[file_id], (size_t)file_size);
#endif
}
#endif
return 1; /* Unknown I/O mode */
}
static inline int io_fdsync(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd)
{
io_prep_fdsync(iocb, fd);
io_set_callback(iocb, cb);
return io_submit(ctx, 1, &iocb);
}
